Merge tag 'platform-drivers-x86-v5.19-1' of...

Merge tag 'platform-drivers-x86-v5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver updates from Hans de Goede:
 "This includes some small changes to kernel/stop_machine.c and arch/x86
  which are deps of the new Intel IFS support.

  Highlights:

   - New drivers:
       - Intel "In Field Scan" (IFS) support
       - Winmate FM07/FM07P buttons
       - Mellanox SN2201 support

   -  AMD PMC driver enhancements

   -  Lots of various other small fixes and hardware-id additions"

* tag 'platform-drivers-x86-v5.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (54 commits)
  platform/x86/intel/ifs: Add CPU_SUP_INTEL dependency
  platform/x86: intel_cht_int33fe: Set driver data
  platform/x86: intel-hid: fix _DSM function index handling
  platform/x86: toshiba_acpi: use kobj_to_dev()
  platform/x86: samsung-laptop: use kobj_to_dev()
  platform/x86: gigabyte-wmi: Add support for Z490 AORUS ELITE AC and X570 AORUS ELITE WIFI
  tools/power/x86/intel-speed-select: Fix warning for perf_cap.cpu
  tools/power/x86/intel-speed-select: Display error on turbo mode disabled
  Documentation: In-Field Scan
  platform/x86/intel/ifs: add ABI documentation for IFS
  trace: platform/x86/intel/ifs: Add trace point to track Intel IFS operations
  platform/x86/intel/ifs: Add IFS sysfs interface
  platform/x86/intel/ifs: Add scan test support
  platform/x86/intel/ifs: Authenticate and copy to secured memory
  platform/x86/intel/ifs: Check IFS Image sanity
  platform/x86/intel/ifs: Read IFS firmware image
  platform/x86/intel/ifs: Add stub driver for In-Field Scan
  stop_machine: Add stop_core_cpuslocked() for per-core operations
  x86/msr-index: Define INTEGRITY_CAPABILITIES MSR
  x86/microcode/intel: Expose collect_cpu_info_early() for IFS
  ...

Documentation/ABI/stable/sysfs-driver-mlxreg-io

@@ -467,3 +467,39 @@ Description:	These files provide the maximum powered required for line card
 		feeding and line card configuration Id.
 
 		The files are read only.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/phy_reset
+Date:		May 2022
+KernelVersion:	5.19
+Contact:	Vadim Pasternak <vadimpmellanox.com>
+Description:	This file allows to reset PHY 88E1548 when attribute is set 0
+		due to some abnormal PHY behavior.
+		Expected behavior:
+		When phy_reset is written 1, all PHY 88E1548 are released
+		from the reset state, when 0 - are hold in reset state.
+
+		The files are read/write.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/mac_reset
+Date:		May 2022
+KernelVersion:	5.19
+Contact:	Vadim Pasternak <vadimpmellanox.com>
+Description:	This file allows to reset ASIC MT52132 when attribute is set 0
+		due to some abnormal ASIC behavior.
+		Expected behavior:
+		When mac_reset is written 1, the ASIC MT52132 is released
+		from the reset state, when 0 - is hold in reset state.
+
+		The files are read/write.
+
+What:		/sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/qsfp_pwr_good
+Date:		May 2022
+KernelVersion:	5.19
+Contact:	Vadim Pasternak <vadimpmellanox.com>
+Description:	This file shows QSFP ports power status. The value is set to 0
+		when one of any QSFP ports is plugged. The value is set to 1 when
+		there are no any QSFP ports are plugged.
+		The possible values are:
+		0 - Power good, 1 - Not power good.
+
+		The files are read only.

Documentation/ABI/testing/sysfs-platform-intel-ifs

+What:		/sys/devices/virtual/misc/intel_ifs_<N>/run_test
+Date:		April 21 2022
+KernelVersion:	5.19
+Contact:	"Jithu Joseph" <jithu.joseph@intel.com>
+Description:	Write <cpu#> to trigger IFS test for one online core.
+		Note that the test is per core. The cpu# can be
+		for any thread on the core. Running on one thread
+		completes the test for the core containing that thread.
+		Example: to test the core containing cpu5: echo 5 >
+		/sys/devices/platform/intel_ifs.<N>/run_test
+
+What:		/sys/devices/virtual/misc/intel_ifs_<N>/status
+Date:		April 21 2022
+KernelVersion:	5.19
+Contact:	"Jithu Joseph" <jithu.joseph@intel.com>
+Description:	The status of the last test. It can be one of "pass", "fail"
+		or "untested".
+
+What:		/sys/devices/virtual/misc/intel_ifs_<N>/details
+Date:		April 21 2022
+KernelVersion:	5.19
+Contact:	"Jithu Joseph" <jithu.joseph@intel.com>
+Description:	Additional information regarding the last test. The details file reports
+		the hex value of the SCAN_STATUS MSR. Note that the error_code field
+		may contain driver defined software code not defined in the Intel SDM.
+
+What:		/sys/devices/virtual/misc/intel_ifs_<N>/image_version
+Date:		April 21 2022
+KernelVersion:	5.19
+Contact:	"Jithu Joseph" <jithu.joseph@intel.com>
+Description:	Version (hexadecimal) of loaded IFS binary image. If no scan image
+		is loaded reports "none".
+
+What:		/sys/devices/virtual/misc/intel_ifs_<N>/reload
+Date:		April 21 2022
+KernelVersion:	5.19
+Contact:	"Jithu Joseph" <jithu.joseph@intel.com>
+Description:	Write "1" (or "y" or "Y") to reload the IFS image from
+		/lib/firmware/intel/ifs/ff-mm-ss.scan.

Documentation/x86/ifs.rst

+.. SPDX-License-Identifier: GPL-2.0
+.. kernel-doc:: drivers/platform/x86/intel/ifs/ifs.h

Documentation/x86/index.rst

@@ -36,6 +36,7 @@ x86-specific Documentation
    usb-legacy-support
    i386/index
    x86_64/index
+   ifs
    sva
    sgx
    features

MAINTAINERS

@@ -9863,6 +9863,14 @@ B:	https://bugzilla.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux.git
 F:	drivers/idle/intel_idle.c
 
+INTEL IN FIELD SCAN (IFS) DEVICE
+M:	Jithu Joseph <jithu.joseph@intel.com>
+R:	Ashok Raj <ashok.raj@intel.com>
+R:	Tony Luck <tony.luck@intel.com>
+S:	Maintained
+F:	drivers/platform/x86/intel/ifs
+F:	include/trace/events/intel_ifs.h
+
 INTEL INTEGRATED SENSOR HUB DRIVER
 M:	Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
 M:	Jiri Kosina <jikos@kernel.org>

arch/x86/include/asm/cpu.h

@@ -76,4 +76,22 @@ static inline void init_ia32_feat_ctl(struct cpuinfo_x86 *c) {}
 
 extern __noendbr void cet_disable(void);
 
+struct ucode_cpu_info;
+
+int intel_cpu_collect_info(struct ucode_cpu_info *uci);
+
+static inline bool intel_cpu_signatures_match(unsigned int s1, unsigned int p1,
+					      unsigned int s2, unsigned int p2)
+{
+	if (s1 != s2)
+		return false;
+
+	/* Processor flags are either both 0 ... */
+	if (!p1 && !p2)
+		return true;
+
+	/* ... or they intersect. */
+	return p1 & p2;
+}
+
 #endif /* _ASM_X86_CPU_H */

arch/x86/include/asm/msr-index.h

@@ -76,6 +76,8 @@
 
 /* Abbreviated from Intel SDM name IA32_CORE_CAPABILITIES */
 #define MSR_IA32_CORE_CAPS			  0x000000cf
+#define MSR_IA32_CORE_CAPS_INTEGRITY_CAPS_BIT	  2
+#define MSR_IA32_CORE_CAPS_INTEGRITY_CAPS	  BIT(MSR_IA32_CORE_CAPS_INTEGRITY_CAPS_BIT)
 #define MSR_IA32_CORE_CAPS_SPLIT_LOCK_DETECT_BIT  5
 #define MSR_IA32_CORE_CAPS_SPLIT_LOCK_DETECT	  BIT(MSR_IA32_CORE_CAPS_SPLIT_LOCK_DETECT_BIT)
 
@@ -154,6 +156,11 @@
 #define MSR_IA32_POWER_CTL		0x000001fc
 #define MSR_IA32_POWER_CTL_BIT_EE	19
 
+/* Abbreviated from Intel SDM name IA32_INTEGRITY_CAPABILITIES */
+#define MSR_INTEGRITY_CAPS			0x000002d9
+#define MSR_INTEGRITY_CAPS_PERIODIC_BIST_BIT	4
+#define MSR_INTEGRITY_CAPS_PERIODIC_BIST	BIT(MSR_INTEGRITY_CAPS_PERIODIC_BIST_BIT)
+
 #define MSR_LBR_NHM_FROM		0x00000680
 #define MSR_LBR_NHM_TO			0x000006c0
 #define MSR_LBR_CORE_FROM		0x00000040

arch/x86/include/uapi/asm/amd_hsmp.h

@@ -31,9 +31,22 @@ enum hsmp_message_ids {
 	HSMP_GET_CCLK_THROTTLE_LIMIT,	/* 10h Get CCLK frequency limit in socket */
 	HSMP_GET_C0_PERCENT,		/* 11h Get average C0 residency in socket */
 	HSMP_SET_NBIO_DPM_LEVEL,	/* 12h Set max/min LCLK DPM Level for a given NBIO */
-					/* 13h Reserved */
-	HSMP_GET_DDR_BANDWIDTH = 0x14,	/* 14h Get theoretical maximum and current DDR Bandwidth */
-	HSMP_GET_TEMP_MONITOR,		/* 15h Get per-DIMM temperature and refresh rates */
+	HSMP_GET_NBIO_DPM_LEVEL,	/* 13h Get LCLK DPM level min and max for a given NBIO */
+	HSMP_GET_DDR_BANDWIDTH,		/* 14h Get theoretical maximum and current DDR Bandwidth */
+	HSMP_GET_TEMP_MONITOR,		/* 15h Get socket temperature */
+	HSMP_GET_DIMM_TEMP_RANGE,	/* 16h Get per-DIMM temperature range and refresh rate */
+	HSMP_GET_DIMM_POWER,		/* 17h Get per-DIMM power consumption */
+	HSMP_GET_DIMM_THERMAL,		/* 18h Get per-DIMM thermal sensors */
+	HSMP_GET_SOCKET_FREQ_LIMIT,	/* 19h Get current active frequency per socket */
+	HSMP_GET_CCLK_CORE_LIMIT,	/* 1Ah Get CCLK frequency limit per core */
+	HSMP_GET_RAILS_SVI,		/* 1Bh Get SVI-based Telemetry for all rails */
+	HSMP_GET_SOCKET_FMAX_FMIN,	/* 1Ch Get Fmax and Fmin per socket */
+	HSMP_GET_IOLINK_BANDWITH,	/* 1Dh Get current bandwidth on IO Link */
+	HSMP_GET_XGMI_BANDWITH,		/* 1Eh Get current bandwidth on xGMI Link */
+	HSMP_SET_GMI3_WIDTH,		/* 1Fh Set max and min GMI3 Link width */
+	HSMP_SET_PCI_RATE,		/* 20h Control link rate on PCIe devices */
+	HSMP_SET_POWER_MODE,		/* 21h Select power efficiency profile policy */
+	HSMP_SET_PSTATE_MAX_MIN,	/* 22h Set the max and min DF P-State  */
 	HSMP_MSG_ID_MAX,
 };
 
@@ -175,8 +188,12 @@ static const struct hsmp_msg_desc hsmp_msg_desc_table[] = {
 	 */
 	{1, 0, HSMP_SET},
 
-	/* RESERVED message */
-	{0, 0, HSMP_RSVD},
+	/*
+	 * HSMP_GET_NBIO_DPM_LEVEL, num_args = 1, response_sz = 1
+	 * input: args[0] = nbioid[23:16]
+	 * output: args[0] = max dpm level[15:8] + min dpm level[7:0]
+	 */
+	{1, 1, HSMP_GET},
 
 	/*
 	 * HSMP_GET_DDR_BANDWIDTH, num_args = 0, response_sz = 1
@@ -191,6 +208,93 @@ static const struct hsmp_msg_desc hsmp_msg_desc_table[] = {
 	 * [7:5] fractional part
 	 */
 	{0, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_DIMM_TEMP_RANGE, num_args = 1, response_sz = 1
+	 * input: args[0] = DIMM address[7:0]
+	 * output: args[0] = refresh rate[3] + temperature range[2:0]
+	 */
+	{1, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_DIMM_POWER, num_args = 1, response_sz = 1
+	 * input: args[0] = DIMM address[7:0]
+	 * output: args[0] = DIMM power in mW[31:17] + update rate in ms[16:8] +
+	 * DIMM address[7:0]
+	 */
+	{1, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_DIMM_THERMAL, num_args = 1, response_sz = 1
+	 * input: args[0] = DIMM address[7:0]
+	 * output: args[0] = temperature in degree celcius[31:21] + update rate in ms[16:8] +
+	 * DIMM address[7:0]
+	 */
+	{1, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_SOCKET_FREQ_LIMIT, num_args = 0, response_sz = 1
+	 * output: args[0] = frequency in MHz[31:16] + frequency source[15:0]
+	 */
+	{0, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_CCLK_CORE_LIMIT, num_args = 1, response_sz = 1
+	 * input: args[0] = apic id [31:0]
+	 * output: args[0] = frequency in MHz[31:0]
+	 */
+	{1, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_RAILS_SVI, num_args = 0, response_sz = 1
+	 * output: args[0] = power in mW[31:0]
+	 */
+	{0, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_SOCKET_FMAX_FMIN, num_args = 0, response_sz = 1
+	 * output: args[0] = fmax in MHz[31:16] + fmin in MHz[15:0]
+	 */
+	{0, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_IOLINK_BANDWITH, num_args = 1, response_sz = 1
+	 * input: args[0] = link id[15:8] + bw type[2:0]
+	 * output: args[0] = io bandwidth in Mbps[31:0]
+	 */
+	{1, 1, HSMP_GET},
+
+	/*
+	 * HSMP_GET_XGMI_BANDWITH, num_args = 1, response_sz = 1
+	 * input: args[0] = link id[15:8] + bw type[2:0]
+	 * output: args[0] = xgmi bandwidth in Mbps[31:0]
+	 */
+	{1, 1, HSMP_GET},
+
+	/*
+	 * HSMP_SET_GMI3_WIDTH, num_args = 1, response_sz = 0
+	 * input: args[0] = min link width[15:8] + max link width[7:0]
+	 */
+	{1, 0, HSMP_SET},
+
+	/*
+	 * HSMP_SET_PCI_RATE, num_args = 1, response_sz = 1
+	 * input: args[0] = link rate control value
+	 * output: args[0] = previous link rate control value
+	 */
+	{1, 1, HSMP_SET},
+
+	/*
+	 * HSMP_SET_POWER_MODE, num_args = 1, response_sz = 0
+	 * input: args[0] = power efficiency mode[2:0]
+	 */
+	{1, 0, HSMP_SET},
+
+	/*
+	 * HSMP_SET_PSTATE_MAX_MIN, num_args = 1, response_sz = 0
+	 * input: args[0] = min df pstate[15:8] + max df pstate[7:0]
+	 */
+	{1, 0, HSMP_SET},
 };
 
 /* Reset to default packing */

arch/x86/kernel/cpu/intel.c

@@ -184,6 +184,38 @@ static bool bad_spectre_microcode(struct cpuinfo_x86 *c)
 	return false;
 }
 
+int intel_cpu_collect_info(struct ucode_cpu_info *uci)
+{
+	unsigned int val[2];
+	unsigned int family, model;
+	struct cpu_signature csig = { 0 };
+	unsigned int eax, ebx, ecx, edx;
+
+	memset(uci, 0, sizeof(*uci));
+
+	eax = 0x00000001;
+	ecx = 0;
+	native_cpuid(&eax, &ebx, &ecx, &edx);
+	csig.sig = eax;
+
+	family = x86_family(eax);
+	model  = x86_model(eax);
+
+	if (model >= 5 || family > 6) {
+		/* get processor flags from MSR 0x17 */
+		native_rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
+		csig.pf = 1 << ((val[1] >> 18) & 7);
+	}
+
+	csig.rev = intel_get_microcode_revision();
+
+	uci->cpu_sig = csig;
+	uci->valid = 1;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(intel_cpu_collect_info);
+
 static void early_init_intel(struct cpuinfo_x86 *c)
 {
 	u64 misc_enable;

arch/x86/kernel/cpu/microcode/intel.c

@@ -45,20 +45,6 @@ static struct microcode_intel *intel_ucode_patch;
 /* last level cache size per core */
 static int llc_size_per_core;
 
-static inline bool cpu_signatures_match(unsigned int s1, unsigned int p1,
-					unsigned int s2, unsigned int p2)
-{
-	if (s1 != s2)
-		return false;
-
-	/* Processor flags are either both 0 ... */
-	if (!p1 && !p2)
-		return true;
-
-	/* ... or they intersect. */
-	return p1 & p2;
-}
-
 /*
  * Returns 1 if update has been found, 0 otherwise.
  */
@@ -69,7 +55,7 @@ static int find_matching_signature(void *mc, unsigned int csig, int cpf)
 	struct extended_signature *ext_sig;
 	int i;
 
-	if (cpu_signatures_match(csig, cpf, mc_hdr->sig, mc_hdr->pf))
+	if (intel_cpu_signatures_match(csig, cpf, mc_hdr->sig, mc_hdr->pf))
 		return 1;
 
 	/* Look for ext. headers: */
@@ -80,7 +66,7 @@ static int find_matching_signature(void *mc, unsigned int csig, int cpf)
 	ext_sig = (void *)ext_hdr + EXT_HEADER_SIZE;
 
 	for (i = 0; i < ext_hdr->count; i++) {
-		if (cpu_signatures_match(csig, cpf, ext_sig->sig, ext_sig->pf))
+		if (intel_cpu_signatures_match(csig, cpf, ext_sig->sig, ext_sig->pf))
 			return 1;
 		ext_sig++;
 	}
@@ -342,37 +328,6 @@ scan_microcode(void *data, size_t size, struct ucode_cpu_info *uci, bool save)
 	return patch;
 }
 
-static int collect_cpu_info_early(struct ucode_cpu_info *uci)
-{
-	unsigned int val[2];
-	unsigned int family, model;
-	struct cpu_signature csig = { 0 };
-	unsigned int eax, ebx, ecx, edx;
-
-	memset(uci, 0, sizeof(*uci));
-
-	eax = 0x00000001;
-	ecx = 0;
-	native_cpuid(&eax, &ebx, &ecx, &edx);
-	csig.sig = eax;
-
-	family = x86_family(eax);
-	model  = x86_model(eax);
-
-	if ((model >= 5) || (family > 6)) {
-		/* get processor flags from MSR 0x17 */
-		native_rdmsr(MSR_IA32_PLATFORM_ID, val[0], val[1]);
-		csig.pf = 1 << ((val[1] >> 18) & 7);
-	}
-
-	csig.rev = intel_get_microcode_revision();
-
-	uci->cpu_sig = csig;
-	uci->valid = 1;
-
-	return 0;
-}
-
 static void show_saved_mc(void)
 {
 #ifdef DEBUG
@@ -386,7 +341,7 @@ static void show_saved_mc(void)
 		return;
 	}
 
-	collect_cpu_info_early(&uci);
+	intel_cpu_collect_info(&uci);
 
 	sig	= uci.cpu_sig.sig;
 	pf	= uci.cpu_sig.pf;
@@ -502,7 +457,7 @@ void show_ucode_info_early(void)
 	struct ucode_cpu_info uci;
 
 	if (delay_ucode_info) {
-		collect_cpu_info_early(&uci);
+		intel_cpu_collect_info(&uci);
 		print_ucode_info(&uci, current_mc_date);
 		delay_ucode_info = 0;
 	}
@@ -604,7 +559,7 @@ int __init save_microcode_in_initrd_intel(void)
 	if (!(cp.data && cp.size))
 		return 0;
 
-	collect_cpu_info_early(&uci);
+	intel_cpu_collect_info(&uci);
 
 	scan_microcode(cp.data, cp.size, &uci, true);
 
@@ -637,7 +592,7 @@ static struct microcode_intel *__load_ucode_intel(struct ucode_cpu_info *uci)
 	if (!(cp.data && cp.size))
 		return NULL;
 
-	collect_cpu_info_early(uci);
+	intel_cpu_collect_info(uci);
 
 	return scan_microcode(cp.data, cp.size, uci, false);
 }
@@ -712,7 +667,7 @@ void reload_ucode_intel(void)
 	struct microcode_intel *p;
 	struct ucode_cpu_info uci;
 
-	collect_cpu_info_early(&uci);
+	intel_cpu_collect_info(&uci);
 
 	p = find_patch(&uci);
 	if (!p)

drivers/platform/mellanox/Kconfig

@@ -78,4 +78,21 @@ config MLXBF_PMC
 	  to performance monitoring counters within various blocks in the
 	  Mellanox BlueField SoC via a sysfs interface.
 
+config NVSW_SN2201
+	tristate "Nvidia SN2201 platform driver support"
+	depends on REGMAP
+	depends on HWMON
+	depends on I2C
+	depends on REGMAP_I2C
+	help
+	  This driver provides support for the Nvidia SN2201 platfom.
+	  The SN2201 is a highly integrated for one rack unit system with
+	  L3 management switches. It has 48 x 1Gbps RJ45 + 4 x 100G QSFP28
+	  ports in a compact 1RU form factor. The system also including a
+	  serial port (RS-232 interface), an OOB port (1G/100M MDI interface)
+	  and USB ports for management functions.
+	  The processor used on SN2201 is Intel Atom®Processor C Series,
+	  C3338R which is one of the Denverton product families.
+	  System equipped with Nvidia®Spectrum-1 32x100GbE Ethernet switch.
+
 endif # MELLANOX_PLATFORM

drivers/platform/mellanox/Makefile

@@ -9,3 +9,4 @@ obj-$(CONFIG_MLXBF_TMFIFO)	+= mlxbf-tmfifo.o
 obj-$(CONFIG_MLXREG_HOTPLUG)	+= mlxreg-hotplug.o
 obj-$(CONFIG_MLXREG_IO) += mlxreg-io.o
 obj-$(CONFIG_MLXREG_LC) += mlxreg-lc.o
+obj-$(CONFIG_NVSW_SN2201) += nvsw-sn2201.o

drivers/platform/mellanox/nvsw-sn2201.c

+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Nvidia sn2201 driver
+ *
+ * Copyright (C) 2022 Nvidia Technologies Ltd.
+ */
+
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/platform_data/mlxcpld.h>
+#include <linux/platform_data/mlxreg.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+/* SN2201 CPLD register offset. */
+#define NVSW_SN2201_CPLD_LPC_I2C_BASE_ADRR          0x2000
+#define NVSW_SN2201_CPLD_LPC_IO_RANGE               0x100
+#define NVSW_SN2201_HW_VER_ID_OFFSET                0x00
+#define NVSW_SN2201_BOARD_ID_OFFSET                 0x01
+#define NVSW_SN2201_CPLD_VER_OFFSET                 0x02
+#define NVSW_SN2201_CPLD_MVER_OFFSET                0x03
+#define NVSW_SN2201_CPLD_ID_OFFSET                  0x04
+#define NVSW_SN2201_CPLD_PN_OFFSET                  0x05
+#define NVSW_SN2201_CPLD_PN1_OFFSET                 0x06
+#define NVSW_SN2201_PSU_CTRL_OFFSET                 0x0a
+#define NVSW_SN2201_QSFP28_STATUS_OFFSET            0x0b
+#define NVSW_SN2201_QSFP28_INT_STATUS_OFFSET        0x0c
+#define NVSW_SN2201_QSFP28_LP_STATUS_OFFSET         0x0d
+#define NVSW_SN2201_QSFP28_RST_STATUS_OFFSET        0x0e
+#define NVSW_SN2201_SYS_STATUS_OFFSET               0x0f
+#define NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET       0x10
+#define NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET       0x12
+#define NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET       0x13
+#define NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET   0x14
+#define NVSW_SN2201_SYS_RST_STATUS_OFFSET           0x15
+#define NVSW_SN2201_SYS_INT_STATUS_OFFSET           0x21
+#define NVSW_SN2201_SYS_INT_MASK_OFFSET             0x22
+#define NVSW_SN2201_ASIC_STATUS_OFFSET              0x24
+#define NVSW_SN2201_ASIC_EVENT_OFFSET               0x25
+#define NVSW_SN2201_ASIC_MAKS_OFFSET                0x26
+#define NVSW_SN2201_THML_STATUS_OFFSET              0x27
+#define NVSW_SN2201_THML_EVENT_OFFSET               0x28
+#define NVSW_SN2201_THML_MASK_OFFSET                0x29
+#define NVSW_SN2201_PS_ALT_STATUS_OFFSET            0x2a
+#define NVSW_SN2201_PS_ALT_EVENT_OFFSET             0x2b
+#define NVSW_SN2201_PS_ALT_MASK_OFFSET              0x2c
+#define NVSW_SN2201_PS_PRSNT_STATUS_OFFSET          0x30
+#define NVSW_SN2201_PS_PRSNT_EVENT_OFFSET           0x31
+#define NVSW_SN2201_PS_PRSNT_MASK_OFFSET            0x32
+#define NVSW_SN2201_PS_DC_OK_STATUS_OFFSET          0x33
+#define NVSW_SN2201_PS_DC_OK_EVENT_OFFSET           0x34
+#define NVSW_SN2201_PS_DC_OK_MASK_OFFSET            0x35
+#define NVSW_SN2201_RST_CAUSE1_OFFSET               0x36
+#define NVSW_SN2201_RST_CAUSE2_OFFSET               0x37
+#define NVSW_SN2201_RST_SW_CTRL_OFFSET              0x38
+#define NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET         0x3a
+#define NVSW_SN2201_FAN_PRSNT_EVENT_OFFSET          0x3b
+#define NVSW_SN2201_FAN_PRSNT_MASK_OFFSET           0x3c
+#define NVSW_SN2201_WD_TMR_OFFSET_LSB               0x40
+#define NVSW_SN2201_WD_TMR_OFFSET_MSB               0x41
+#define NVSW_SN2201_WD_ACT_OFFSET                   0x42
+#define NVSW_SN2201_FAN_LED1_CTRL_OFFSET            0x50
+#define NVSW_SN2201_FAN_LED2_CTRL_OFFSET            0x51
+#define NVSW_SN2201_REG_MAX                         0x52
+
+/* Number of physical I2C busses. */
+#define NVSW_SN2201_PHY_I2C_BUS_NUM		2
+/* Number of main mux channels. */
+#define NVSW_SN2201_MAIN_MUX_CHNL_NUM		8
+
+#define NVSW_SN2201_MAIN_NR			0
+#define NVSW_SN2201_MAIN_MUX_NR			1
+#define NVSW_SN2201_MAIN_MUX_DEFER_NR		(NVSW_SN2201_PHY_I2C_BUS_NUM + \
+						 NVSW_SN2201_MAIN_MUX_CHNL_NUM - 1)
+
+#define NVSW_SN2201_MAIN_MUX_CH0_NR	NVSW_SN2201_PHY_I2C_BUS_NUM
+#define NVSW_SN2201_MAIN_MUX_CH1_NR	(NVSW_SN2201_MAIN_MUX_CH0_NR + 1)
+#define NVSW_SN2201_MAIN_MUX_CH2_NR	(NVSW_SN2201_MAIN_MUX_CH0_NR + 2)
+#define NVSW_SN2201_MAIN_MUX_CH3_NR	(NVSW_SN2201_MAIN_MUX_CH0_NR + 3)
+#define NVSW_SN2201_MAIN_MUX_CH5_NR	(NVSW_SN2201_MAIN_MUX_CH0_NR + 5)
+#define NVSW_SN2201_MAIN_MUX_CH6_NR	(NVSW_SN2201_MAIN_MUX_CH0_NR + 6)
+#define NVSW_SN2201_MAIN_MUX_CH7_NR	(NVSW_SN2201_MAIN_MUX_CH0_NR + 7)
+
+#define NVSW_SN2201_CPLD_NR		NVSW_SN2201_MAIN_MUX_CH0_NR
+#define NVSW_SN2201_NR_NONE		-1
+
+/* Masks for aggregation, PSU presence and power, ASIC events
+ * in CPLD related registers.
+ */
+#define NVSW_SN2201_CPLD_AGGR_ASIC_MASK_DEF	0xe0
+#define NVSW_SN2201_CPLD_AGGR_PSU_MASK_DEF	0x04
+#define NVSW_SN2201_CPLD_AGGR_PWR_MASK_DEF	0x02
+#define NVSW_SN2201_CPLD_AGGR_FAN_MASK_DEF	0x10
+#define NVSW_SN2201_CPLD_AGGR_MASK_DEF      \
+	(NVSW_SN2201_CPLD_AGGR_ASIC_MASK_DEF \
+	| NVSW_SN2201_CPLD_AGGR_PSU_MASK_DEF \
+	| NVSW_SN2201_CPLD_AGGR_PWR_MASK_DEF \
+	| NVSW_SN2201_CPLD_AGGR_FAN_MASK_DEF)
+
+#define NVSW_SN2201_CPLD_ASIC_MASK		GENMASK(3, 1)
+#define NVSW_SN2201_CPLD_PSU_MASK		GENMASK(1, 0)
+#define NVSW_SN2201_CPLD_PWR_MASK		GENMASK(1, 0)
+#define NVSW_SN2201_CPLD_FAN_MASK		GENMASK(3, 0)
+
+#define NVSW_SN2201_CPLD_SYSIRQ			26
+#define NVSW_SN2201_LPC_SYSIRQ			28
+#define NVSW_SN2201_CPLD_I2CADDR		0x41
+
+#define NVSW_SN2201_WD_DFLT_TIMEOUT		600
+
+/* nvsw_sn2201 - device private data
+ * @dev: platform device;
+ * @io_data: register access platform data;
+ * @led_data: LED platform data;
+ * @hotplug_data: hotplug platform data;
+ * @i2c_data: I2C controller platform data;
+ * @led: LED device;
+ * @io_regs: register access device;
+ * @pdev_hotplug: hotplug device;
+ * @sn2201_devs: I2C devices for sn2201 devices;
+ * @sn2201_devs_num: number of I2C devices for sn2201 device;
+ * @main_mux_devs: I2C devices for main mux;
+ * @main_mux_devs_num: number of I2C devices for main mux;
+ * @cpld_devs: I2C devices for cpld;
+ * @cpld_devs_num: number of I2C devices for cpld;
+ * @main_mux_deferred_nr: I2C adapter number must be exist prior creating devices execution;
+ */
+struct nvsw_sn2201 {
+	struct device *dev;
+	struct mlxreg_core_platform_data *io_data;
+	struct mlxreg_core_platform_data *led_data;
+	struct mlxreg_core_platform_data *wd_data;
+	struct mlxreg_core_hotplug_platform_data *hotplug_data;
+	struct mlxreg_core_hotplug_platform_data *i2c_data;
+	struct platform_device *led;
+	struct platform_device *wd;
+	struct platform_device *io_regs;
+	struct platform_device *pdev_hotplug;
+	struct platform_device *pdev_i2c;
+	struct mlxreg_hotplug_device *sn2201_devs;
+	int sn2201_devs_num;
+	struct mlxreg_hotplug_device *main_mux_devs;
+	int main_mux_devs_num;
+	struct mlxreg_hotplug_device *cpld_devs;
+	int cpld_devs_num;
+	int main_mux_deferred_nr;
+};
+
+static bool nvsw_sn2201_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case NVSW_SN2201_PSU_CTRL_OFFSET:
+	case NVSW_SN2201_QSFP28_LP_STATUS_OFFSET:
+	case NVSW_SN2201_QSFP28_RST_STATUS_OFFSET:
+	case NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET:
+	case NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET:
+	case NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET:
+	case NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET:
+	case NVSW_SN2201_SYS_RST_STATUS_OFFSET:
+	case NVSW_SN2201_SYS_INT_MASK_OFFSET:
+	case NVSW_SN2201_ASIC_EVENT_OFFSET:
+	case NVSW_SN2201_ASIC_MAKS_OFFSET:
+	case NVSW_SN2201_THML_EVENT_OFFSET:
+	case NVSW_SN2201_THML_MASK_OFFSET:
+	case NVSW_SN2201_PS_ALT_EVENT_OFFSET:
+	case NVSW_SN2201_PS_ALT_MASK_OFFSET:
+	case NVSW_SN2201_PS_PRSNT_EVENT_OFFSET:
+	case NVSW_SN2201_PS_PRSNT_MASK_OFFSET:
+	case NVSW_SN2201_PS_DC_OK_EVENT_OFFSET:
+	case NVSW_SN2201_PS_DC_OK_MASK_OFFSET:
+	case NVSW_SN2201_RST_SW_CTRL_OFFSET:
+	case NVSW_SN2201_FAN_PRSNT_EVENT_OFFSET:
+	case NVSW_SN2201_FAN_PRSNT_MASK_OFFSET:
+	case NVSW_SN2201_WD_TMR_OFFSET_LSB:
+	case NVSW_SN2201_WD_TMR_OFFSET_MSB:
+	case NVSW_SN2201_WD_ACT_OFFSET:
+	case NVSW_SN2201_FAN_LED1_CTRL_OFFSET:
+	case NVSW_SN2201_FAN_LED2_CTRL_OFFSET:
+		return true;
+	}
+	return false;
+}
+
+static bool nvsw_sn2201_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case NVSW_SN2201_HW_VER_ID_OFFSET:
+	case NVSW_SN2201_BOARD_ID_OFFSET:
+	case NVSW_SN2201_CPLD_VER_OFFSET:
+	case NVSW_SN2201_CPLD_MVER_OFFSET:
+	case NVSW_SN2201_CPLD_ID_OFFSET:
+	case NVSW_SN2201_CPLD_PN_OFFSET:
+	case NVSW_SN2201_CPLD_PN1_OFFSET:
+	case NVSW_SN2201_PSU_CTRL_OFFSET:
+	case NVSW_SN2201_QSFP28_STATUS_OFFSET:
+	case NVSW_SN2201_QSFP28_INT_STATUS_OFFSET:
+	case NVSW_SN2201_QSFP28_LP_STATUS_OFFSET:
+	case NVSW_SN2201_QSFP28_RST_STATUS_OFFSET:
+	case NVSW_SN2201_SYS_STATUS_OFFSET:
+	case NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET:
+	case NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET:
+	case NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET:
+	case NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET:
+	case NVSW_SN2201_SYS_RST_STATUS_OFFSET:
+	case NVSW_SN2201_RST_CAUSE1_OFFSET:
+	case NVSW_SN2201_RST_CAUSE2_OFFSET:
+	case NVSW_SN2201_SYS_INT_STATUS_OFFSET:
+	case NVSW_SN2201_SYS_INT_MASK_OFFSET:
+	case NVSW_SN2201_ASIC_STATUS_OFFSET:
+	case NVSW_SN2201_ASIC_EVENT_OFFSET:
+	case NVSW_SN2201_ASIC_MAKS_OFFSET:
+	case NVSW_SN2201_THML_STATUS_OFFSET:
+	case NVSW_SN2201_THML_EVENT_OFFSET:
+	case NVSW_SN2201_THML_MASK_OFFSET:
+	case NVSW_SN2201_PS_ALT_STATUS_OFFSET:
+	case NVSW_SN2201_PS_ALT_EVENT_OFFSET:
+	case NVSW_SN2201_PS_ALT_MASK_OFFSET:
+	case NVSW_SN2201_PS_PRSNT_STATUS_OFFSET:
+	case NVSW_SN2201_PS_PRSNT_EVENT_OFFSET:
+	case NVSW_SN2201_PS_PRSNT_MASK_OFFSET:
+	case NVSW_SN2201_PS_DC_OK_STATUS_OFFSET:
+	case NVSW_SN2201_PS_DC_OK_EVENT_OFFSET:
+	case NVSW_SN2201_PS_DC_OK_MASK_OFFSET:
+	case NVSW_SN2201_RST_SW_CTRL_OFFSET:
+	case NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET:
+	case NVSW_SN2201_FAN_PRSNT_EVENT_OFFSET:
+	case NVSW_SN2201_FAN_PRSNT_MASK_OFFSET:
+	case NVSW_SN2201_WD_TMR_OFFSET_LSB:
+	case NVSW_SN2201_WD_TMR_OFFSET_MSB:
+	case NVSW_SN2201_WD_ACT_OFFSET:
+	case NVSW_SN2201_FAN_LED1_CTRL_OFFSET:
+	case NVSW_SN2201_FAN_LED2_CTRL_OFFSET:
+		return true;
+	}
+	return false;
+}
+
+static bool nvsw_sn2201_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case NVSW_SN2201_HW_VER_ID_OFFSET:
+	case NVSW_SN2201_BOARD_ID_OFFSET:
+	case NVSW_SN2201_CPLD_VER_OFFSET:
+	case NVSW_SN2201_CPLD_MVER_OFFSET:
+	case NVSW_SN2201_CPLD_ID_OFFSET:
+	case NVSW_SN2201_CPLD_PN_OFFSET:
+	case NVSW_SN2201_CPLD_PN1_OFFSET:
+	case NVSW_SN2201_PSU_CTRL_OFFSET:
+	case NVSW_SN2201_QSFP28_STATUS_OFFSET:
+	case NVSW_SN2201_QSFP28_INT_STATUS_OFFSET:
+	case NVSW_SN2201_QSFP28_LP_STATUS_OFFSET:
+	case NVSW_SN2201_QSFP28_RST_STATUS_OFFSET:
+	case NVSW_SN2201_SYS_STATUS_OFFSET:
+	case NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET:
+	case NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET:
+	case NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET:
+	case NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET:
+	case NVSW_SN2201_SYS_RST_STATUS_OFFSET:
+	case NVSW_SN2201_RST_CAUSE1_OFFSET:
+	case NVSW_SN2201_RST_CAUSE2_OFFSET:
+	case NVSW_SN2201_SYS_INT_STATUS_OFFSET:
+	case NVSW_SN2201_SYS_INT_MASK_OFFSET:
+	case NVSW_SN2201_ASIC_STATUS_OFFSET:
+	case NVSW_SN2201_ASIC_EVENT_OFFSET:
+	case NVSW_SN2201_ASIC_MAKS_OFFSET:
+	case NVSW_SN2201_THML_STATUS_OFFSET:
+	case NVSW_SN2201_THML_EVENT_OFFSET:
+	case NVSW_SN2201_THML_MASK_OFFSET:
+	case NVSW_SN2201_PS_ALT_STATUS_OFFSET:
+	case NVSW_SN2201_PS_ALT_EVENT_OFFSET:
+	case NVSW_SN2201_PS_ALT_MASK_OFFSET:
+	case NVSW_SN2201_PS_PRSNT_STATUS_OFFSET:
+	case NVSW_SN2201_PS_PRSNT_EVENT_OFFSET:
+	case NVSW_SN2201_PS_PRSNT_MASK_OFFSET:
+	case NVSW_SN2201_PS_DC_OK_STATUS_OFFSET:
+	case NVSW_SN2201_PS_DC_OK_EVENT_OFFSET:
+	case NVSW_SN2201_PS_DC_OK_MASK_OFFSET:
+	case NVSW_SN2201_RST_SW_CTRL_OFFSET:
+	case NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET:
+	case NVSW_SN2201_FAN_PRSNT_EVENT_OFFSET:
+	case NVSW_SN2201_FAN_PRSNT_MASK_OFFSET:
+	case NVSW_SN2201_WD_TMR_OFFSET_LSB:
+	case NVSW_SN2201_WD_TMR_OFFSET_MSB:
+	case NVSW_SN2201_FAN_LED1_CTRL_OFFSET:
+	case NVSW_SN2201_FAN_LED2_CTRL_OFFSET:
+		return true;
+	}
+	return false;
+}
+
+static const struct reg_default nvsw_sn2201_regmap_default[] = {
+	{ NVSW_SN2201_QSFP28_LED_TEST_STATUS_OFFSET, 0x00 },
+	{ NVSW_SN2201_WD_ACT_OFFSET, 0x00 },
+};
+
+/* Configuration for the register map of a device with 1 bytes address space. */
+static const struct regmap_config nvsw_sn2201_regmap_conf = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = NVSW_SN2201_REG_MAX,
+	.cache_type = REGCACHE_FLAT,
+	.writeable_reg = nvsw_sn2201_writeable_reg,
+	.readable_reg = nvsw_sn2201_readable_reg,
+	.volatile_reg = nvsw_sn2201_volatile_reg,
+	.reg_defaults = nvsw_sn2201_regmap_default,
+	.num_reg_defaults = ARRAY_SIZE(nvsw_sn2201_regmap_default),
+};
+
+/* Regions for LPC I2C controller and LPC base register space. */
+static const struct resource nvsw_sn2201_lpc_io_resources[] = {
+	[0] = DEFINE_RES_NAMED(NVSW_SN2201_CPLD_LPC_I2C_BASE_ADRR,
+			       NVSW_SN2201_CPLD_LPC_IO_RANGE,
+			       "mlxplat_cpld_lpc_i2c_ctrl", IORESOURCE_IO),
+};
+
+static struct resource nvsw_sn2201_cpld_res[] = {
+	[0] = DEFINE_RES_IRQ_NAMED(NVSW_SN2201_CPLD_SYSIRQ, "mlxreg-hotplug"),
+};
+
+static struct resource nvsw_sn2201_lpc_res[] = {
+	[0] = DEFINE_RES_IRQ_NAMED(NVSW_SN2201_LPC_SYSIRQ, "i2c-mlxcpld"),
+};
+
+/* SN2201 I2C platform data. */
+struct mlxreg_core_hotplug_platform_data nvsw_sn2201_i2c_data = {
+	.irq = NVSW_SN2201_CPLD_SYSIRQ,
+};
+
+/* SN2201 CPLD device. */
+static struct i2c_board_info nvsw_sn2201_cpld_devices[] = {
+	{
+		I2C_BOARD_INFO("nvsw-sn2201", 0x41),
+	},
+};
+
+/* SN2201 CPLD board info. */
+static struct mlxreg_hotplug_device nvsw_sn2201_cpld_brdinfo[] = {
+	{
+		.brdinfo = &nvsw_sn2201_cpld_devices[0],
+		.nr = NVSW_SN2201_CPLD_NR,
+	},
+};
+
+/* SN2201 main mux device. */
+static struct i2c_board_info nvsw_sn2201_main_mux_devices[] = {
+	{
+		I2C_BOARD_INFO("pca9548", 0x70),
+	},
+};
+
+/* SN2201 main mux board info. */
+static struct mlxreg_hotplug_device nvsw_sn2201_main_mux_brdinfo[] = {
+	{
+		.brdinfo = &nvsw_sn2201_main_mux_devices[0],
+		.nr = NVSW_SN2201_MAIN_MUX_NR,
+	},
+};
+
+/* SN2201 power devices. */
+static struct i2c_board_info nvsw_sn2201_pwr_devices[] = {
+	{
+		I2C_BOARD_INFO("pmbus", 0x58),
+	},
+	{
+		I2C_BOARD_INFO("pmbus", 0x58),
+	},
+};
+
+/* SN2201 fan devices. */
+static struct i2c_board_info nvsw_sn2201_fan_devices[] = {
+	{
+		I2C_BOARD_INFO("24c02", 0x50),
+	},
+	{
+		I2C_BOARD_INFO("24c02", 0x51),
+	},
+	{
+		I2C_BOARD_INFO("24c02", 0x52),
+	},
+	{
+		I2C_BOARD_INFO("24c02", 0x53),
+	},
+};
+
+/* SN2201 hotplug default data. */
+static struct mlxreg_core_data nvsw_sn2201_psu_items_data[] = {
+	{
+		.label = "psu1",
+		.reg = NVSW_SN2201_PS_PRSNT_STATUS_OFFSET,
+		.mask = BIT(0),
+		.hpdev.nr = NVSW_SN2201_NR_NONE,
+	},
+	{
+		.label = "psu2",
+		.reg = NVSW_SN2201_PS_PRSNT_STATUS_OFFSET,
+		.mask = BIT(1),
+		.hpdev.nr = NVSW_SN2201_NR_NONE,
+	},
+};
+
+static struct mlxreg_core_data nvsw_sn2201_pwr_items_data[] = {
+	{
+		.label = "pwr1",
+		.reg = NVSW_SN2201_PS_DC_OK_STATUS_OFFSET,
+		.mask = BIT(0),
+		.hpdev.brdinfo = &nvsw_sn2201_pwr_devices[0],
+		.hpdev.nr = NVSW_SN2201_MAIN_MUX_CH1_NR,
+	},
+	{
+		.label = "pwr2",
+		.reg = NVSW_SN2201_PS_DC_OK_STATUS_OFFSET,
+		.mask = BIT(1),
+		.hpdev.brdinfo = &nvsw_sn2201_pwr_devices[1],
+		.hpdev.nr = NVSW_SN2201_MAIN_MUX_CH2_NR,
+	},
+};
+
+static struct mlxreg_core_data nvsw_sn2201_fan_items_data[] = {
+	{
+		.label = "fan1",
+		.reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,
+		.mask = BIT(0),
+		.hpdev.brdinfo = &nvsw_sn2201_fan_devices[0],
+		.hpdev.nr = NVSW_SN2201_NR_NONE,
+	},
+	{
+		.label = "fan2",
+		.reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,
+		.mask = BIT(1),
+		.hpdev.brdinfo = &nvsw_sn2201_fan_devices[1],
+		.hpdev.nr = NVSW_SN2201_NR_NONE,
+	},
+	{
+		.label = "fan3",
+		.reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,
+		.mask = BIT(2),
+		.hpdev.brdinfo = &nvsw_sn2201_fan_devices[2],
+		.hpdev.nr = NVSW_SN2201_NR_NONE,
+	},
+	{
+		.label = "fan4",
+		.reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,
+		.mask = BIT(3),
+		.hpdev.brdinfo = &nvsw_sn2201_fan_devices[3],
+		.hpdev.nr = NVSW_SN2201_NR_NONE,
+	},
+};
+
+static struct mlxreg_core_data nvsw_sn2201_sys_items_data[] = {
+	{
+		.label = "nic_smb_alert",
+		.reg = NVSW_SN2201_ASIC_STATUS_OFFSET,
+		.mask = BIT(1),
+		.hpdev.nr = NVSW_SN2201_NR_NONE,
+	},
+	{
+		.label = "cpu_sd",
+		.reg = NVSW_SN2201_ASIC_STATUS_OFFSET,
+		.mask = BIT(2),
+		.hpdev.nr = NVSW_SN2201_NR_NONE,
+	},
+	{
+		.label = "mac_health",
+		.reg = NVSW_SN2201_ASIC_STATUS_OFFSET,
+		.mask = BIT(3),
+		.hpdev.nr = NVSW_SN2201_NR_NONE,
+	},
+};
+
+static struct mlxreg_core_item nvsw_sn2201_items[] = {
+	{
+		.data = nvsw_sn2201_psu_items_data,
+		.aggr_mask = NVSW_SN2201_CPLD_AGGR_PSU_MASK_DEF,
+		.reg = NVSW_SN2201_PS_PRSNT_STATUS_OFFSET,
+		.mask = NVSW_SN2201_CPLD_PSU_MASK,
+		.count = ARRAY_SIZE(nvsw_sn2201_psu_items_data),
+		.inversed = 1,
+		.health = false,
+	},
+	{
+		.data = nvsw_sn2201_pwr_items_data,
+		.aggr_mask = NVSW_SN2201_CPLD_AGGR_PWR_MASK_DEF,
+		.reg = NVSW_SN2201_PS_DC_OK_STATUS_OFFSET,
+		.mask = NVSW_SN2201_CPLD_PWR_MASK,
+		.count = ARRAY_SIZE(nvsw_sn2201_pwr_items_data),
+		.inversed = 0,
+		.health = false,
+	},
+	{
+		.data = nvsw_sn2201_fan_items_data,
+		.aggr_mask = NVSW_SN2201_CPLD_AGGR_FAN_MASK_DEF,
+		.reg = NVSW_SN2201_FAN_PRSNT_STATUS_OFFSET,
+		.mask = NVSW_SN2201_CPLD_FAN_MASK,
+		.count = ARRAY_SIZE(nvsw_sn2201_fan_items_data),
+		.inversed = 1,
+		.health = false,
+	},
+	{
+		.data = nvsw_sn2201_sys_items_data,
+		.aggr_mask = NVSW_SN2201_CPLD_AGGR_ASIC_MASK_DEF,
+		.reg = NVSW_SN2201_ASIC_STATUS_OFFSET,
+		.mask = NVSW_SN2201_CPLD_ASIC_MASK,
+		.count = ARRAY_SIZE(nvsw_sn2201_sys_items_data),
+		.inversed = 1,
+		.health = false,
+	},
+};
+
+static
+struct mlxreg_core_hotplug_platform_data nvsw_sn2201_hotplug = {
+	.items = nvsw_sn2201_items,
+	.counter = ARRAY_SIZE(nvsw_sn2201_items),
+	.cell = NVSW_SN2201_SYS_INT_STATUS_OFFSET,
+	.mask = NVSW_SN2201_CPLD_AGGR_MASK_DEF,
+};
+
+/* SN2201 static devices. */
+static struct i2c_board_info nvsw_sn2201_static_devices[] = {
+	{
+		I2C_BOARD_INFO("24c02", 0x57),
+	},
+	{
+		I2C_BOARD_INFO("lm75", 0x4b),
+	},
+	{
+		I2C_BOARD_INFO("24c64", 0x56),
+	},
+	{
+		I2C_BOARD_INFO("ads1015", 0x49),
+	},
+	{
+		I2C_BOARD_INFO("pca9546", 0x71),
+	},
+	{
+		I2C_BOARD_INFO("emc2305", 0x4d),
+	},
+	{
+		I2C_BOARD_INFO("lm75", 0x49),
+	},
+	{
+		I2C_BOARD_INFO("pca9555", 0x27),
+	},
+	{
+		I2C_BOARD_INFO("powr1014", 0x37),
+	},
+	{
+		I2C_BOARD_INFO("lm75", 0x4f),
+	},
+	{
+		I2C_BOARD_INFO("pmbus", 0x40),
+	},
+};
+
+/* SN2201 default static board info. */
+static struct mlxreg_hotplug_device nvsw_sn2201_static_brdinfo[] = {
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[0],
+		.nr = NVSW_SN2201_MAIN_NR,
+	},
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[1],
+		.nr = NVSW_SN2201_MAIN_MUX_CH0_NR,
+	},
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[2],
+		.nr = NVSW_SN2201_MAIN_MUX_CH0_NR,
+	},
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[3],
+		.nr = NVSW_SN2201_MAIN_MUX_CH0_NR,
+	},
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[4],
+		.nr = NVSW_SN2201_MAIN_MUX_CH3_NR,
+	},
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[5],
+		.nr = NVSW_SN2201_MAIN_MUX_CH5_NR,
+	},
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[6],
+		.nr = NVSW_SN2201_MAIN_MUX_CH5_NR,
+	},
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[7],
+		.nr = NVSW_SN2201_MAIN_MUX_CH5_NR,
+	},
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[8],
+		.nr = NVSW_SN2201_MAIN_MUX_CH6_NR,
+	},
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[9],
+		.nr = NVSW_SN2201_MAIN_MUX_CH6_NR,
+	},
+	{
+		.brdinfo = &nvsw_sn2201_static_devices[10],
+		.nr = NVSW_SN2201_MAIN_MUX_CH7_NR,
+	},
+};
+
+/* LED default data. */
+static struct mlxreg_core_data nvsw_sn2201_led_data[] = {
+	{
+		.label = "status:green",
+		.reg = NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET,
+		.mask = GENMASK(7, 4),
+	},
+	{
+		.label = "status:orange",
+		.reg = NVSW_SN2201_FRONT_SYS_LED_CTRL_OFFSET,
+		.mask = GENMASK(7, 4),
+	},
+	{
+		.label = "psu:green",
+		.reg = NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET,
+		.mask = GENMASK(7, 4),
+	},
+	{
+		.label = "psu:orange",
+		.reg = NVSW_SN2201_FRONT_PSU_LED_CTRL_OFFSET,
+		.mask = GENMASK(7, 4),
+	},
+	{
+		.label = "uid:blue",
+		.reg = NVSW_SN2201_FRONT_UID_LED_CTRL_OFFSET,
+		.mask = GENMASK(7, 4),
+	},
+	{
+		.label = "fan1:green",
+		.reg = NVSW_SN2201_FAN_LED1_CTRL_OFFSET,
+		.mask = GENMASK(7, 4),
+	},
+	{
+		.label = "fan1:orange",
+		.reg = NVSW_SN2201_FAN_LED1_CTRL_OFFSET,
+		.mask = GENMASK(7, 4),
+	},
+	{
+		.label = "fan2:green",
+		.reg = NVSW_SN2201_FAN_LED1_CTRL_OFFSET,
+		.mask = GENMASK(3, 0),
+	},
+	{
+		.label = "fan2:orange",
+		.reg = NVSW_SN2201_FAN_LED1_CTRL_OFFSET,
+		.mask = GENMASK(3, 0),
+	},
+	{
+		.label = "fan3:green",
+		.reg = NVSW_SN2201_FAN_LED2_CTRL_OFFSET,
+		.mask = GENMASK(7, 4),
+	},
+	{
+		.label = "fan3:orange",
+		.reg = NVSW_SN2201_FAN_LED2_CTRL_OFFSET,
+		.mask = GENMASK(7, 4),
+	},
+	{
+		.label = "fan4:green",
+		.reg = NVSW_SN2201_FAN_LED2_CTRL_OFFSET,
+		.mask = GENMASK(3, 0),
+	},
+	{
+		.label = "fan4:orange",
+		.reg = NVSW_SN2201_FAN_LED2_CTRL_OFFSET,
+		.mask = GENMASK(3, 0),
+	},
+};
+
+static struct mlxreg_core_platform_data nvsw_sn2201_led = {
+	.data = nvsw_sn2201_led_data,
+	.counter = ARRAY_SIZE(nvsw_sn2201_led_data),
+};
+
+/* Default register access data. */
+static struct mlxreg_core_data nvsw_sn2201_io_data[] = {
+	{
+		.label = "cpld1_version",
+		.reg = NVSW_SN2201_CPLD_VER_OFFSET,
+		.bit = GENMASK(7, 0),
+		.mode = 0444,
+	},
+	{
+		.label = "cpld1_version_min",
+		.reg = NVSW_SN2201_CPLD_MVER_OFFSET,
+		.bit = GENMASK(7, 0),
+		.mode = 0444,
+	},
+	{
+		.label = "cpld1_pn",
+		.reg = NVSW_SN2201_CPLD_PN_OFFSET,
+		.bit = GENMASK(15, 0),
+		.mode = 0444,
+		.regnum = 2,
+	},
+	{
+		.label = "psu1_on",
+		.reg = NVSW_SN2201_PSU_CTRL_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(0),
+		.mode = 0644,
+	},
+	{
+		.label = "psu2_on",
+		.reg = NVSW_SN2201_PSU_CTRL_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(1),
+		.mode = 0644,
+	},
+	{
+		.label = "pwr_cycle",
+		.reg = NVSW_SN2201_PSU_CTRL_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(2),
+		.mode = 0644,
+	},
+	{
+		.label = "asic_health",
+		.reg = NVSW_SN2201_SYS_STATUS_OFFSET,
+		.mask = GENMASK(4, 3),
+		.bit = 4,
+		.mode = 0444,
+	},
+	{
+		.label = "qsfp_pwr_good",
+		.reg = NVSW_SN2201_SYS_STATUS_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(0),
+		.mode = 0444,
+	},
+	{
+		.label = "phy_reset",
+		.reg = NVSW_SN2201_SYS_RST_STATUS_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(3),
+		.mode = 0644,
+	},
+	{
+		.label = "mac_reset",
+		.reg = NVSW_SN2201_SYS_RST_STATUS_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(2),
+		.mode = 0644,
+	},
+	{
+		.label = "pwr_down",
+		.reg = NVSW_SN2201_RST_SW_CTRL_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(0),
+		.mode = 0644,
+	},
+	{
+		.label = "reset_long_pb",
+		.reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(0),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_short_pb",
+		.reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(1),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_aux_pwr_or_fu",
+		.reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(2),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_swb_dc_dc_pwr_fail",
+		.reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(3),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_sw_reset",
+		.reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(4),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_fw_reset",
+		.reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(5),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_swb_wd",
+		.reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(6),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_asic_thermal",
+		.reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(7),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_system",
+		.reg = NVSW_SN2201_RST_CAUSE2_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(1),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_sw_pwr_off",
+		.reg = NVSW_SN2201_RST_CAUSE2_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(2),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_cpu_pwr_fail_thermal",
+		.reg = NVSW_SN2201_RST_CAUSE2_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(4),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_reload_bios",
+		.reg = NVSW_SN2201_RST_CAUSE2_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(5),
+		.mode = 0444,
+	},
+	{
+		.label = "reset_ac_pwr_fail",
+		.reg = NVSW_SN2201_RST_CAUSE2_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(6),
+		.mode = 0444,
+	},
+	{
+		.label = "psu1",
+		.reg = NVSW_SN2201_PS_PRSNT_STATUS_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(0),
+		.mode = 0444,
+	},
+	{
+		.label = "psu2",
+		.reg = NVSW_SN2201_PS_PRSNT_STATUS_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(1),
+		.mode = 0444,
+	},
+};
+
+static struct mlxreg_core_platform_data nvsw_sn2201_regs_io = {
+	.data = nvsw_sn2201_io_data,
+	.counter = ARRAY_SIZE(nvsw_sn2201_io_data),
+};
+
+/* Default watchdog data. */
+static struct mlxreg_core_data nvsw_sn2201_wd_data[] = {
+	{
+		.label = "action",
+		.reg = NVSW_SN2201_WD_ACT_OFFSET,
+		.mask = GENMASK(7, 1),
+		.bit = 0,
+	},
+	{
+		.label = "timeout",
+		.reg = NVSW_SN2201_WD_TMR_OFFSET_LSB,
+		.mask = 0,
+		.health_cntr = NVSW_SN2201_WD_DFLT_TIMEOUT,
+	},
+	{
+		.label = "timeleft",
+		.reg = NVSW_SN2201_WD_TMR_OFFSET_LSB,
+		.mask = 0,
+	},
+	{
+		.label = "ping",
+		.reg = NVSW_SN2201_WD_ACT_OFFSET,
+		.mask = GENMASK(7, 1),
+		.bit = 0,
+	},
+	{
+		.label = "reset",
+		.reg = NVSW_SN2201_RST_CAUSE1_OFFSET,
+		.mask = GENMASK(7, 0) & ~BIT(6),
+		.bit = 6,
+	},
+};
+
+static struct mlxreg_core_platform_data nvsw_sn2201_wd = {
+	.data = nvsw_sn2201_wd_data,
+	.counter = ARRAY_SIZE(nvsw_sn2201_wd_data),
+	.version = MLX_WDT_TYPE3,
+	.identity = "mlx-wdt-main",
+};
+
+static int
+nvsw_sn2201_create_static_devices(struct nvsw_sn2201 *nvsw_sn2201,
+				  struct mlxreg_hotplug_device *devs,
+				  int size)
+{
+	struct mlxreg_hotplug_device *dev = devs;
+	int i;
+
+	/* Create I2C static devices. */
+	for (i = 0; i < size; i++, dev++) {
+		dev->client = i2c_new_client_device(dev->adapter, dev->brdinfo);
+		if (IS_ERR(dev->client)) {
+			dev_err(nvsw_sn2201->dev, "Failed to create client %s at bus %d at addr 0x%02x\n",
+				dev->brdinfo->type,
+				dev->nr, dev->brdinfo->addr);
+
+			dev->adapter = NULL;
+			goto fail_create_static_devices;
+		}
+	}
+
+	return 0;
+
+fail_create_static_devices:
+	while (--i >= 0) {
+		dev = devs + i;
+		i2c_unregister_device(dev->client);
+		dev->client = NULL;
+		dev->adapter = NULL;
+	}
+	return IS_ERR(dev->client);
+}
+
+static void nvsw_sn2201_destroy_static_devices(struct nvsw_sn2201 *nvsw_sn2201,
+					       struct mlxreg_hotplug_device *devs, int size)
+{
+	struct mlxreg_hotplug_device *dev = devs;
+	int i;
+
+	/* Destroy static I2C device for SN2201 static devices. */
+	for (i = 0; i < size; i++, dev++) {
+		if (dev->client) {
+			i2c_unregister_device(dev->client);
+			dev->client = NULL;
+			i2c_put_adapter(dev->adapter);
+			dev->adapter = NULL;
+		}
+	}
+}
+
+static int nvsw_sn2201_config_post_init(struct nvsw_sn2201 *nvsw_sn2201)
+{
+	struct mlxreg_hotplug_device *sn2201_dev;
+	struct i2c_adapter *adap;
+	struct device *dev;
+	int i, err;
+
+	dev = nvsw_sn2201->dev;
+	adap = i2c_get_adapter(nvsw_sn2201->main_mux_deferred_nr);
+	if (!adap) {
+		dev_err(dev, "Failed to get adapter for bus %d\n",
+			nvsw_sn2201->main_mux_deferred_nr);
+		return -ENODEV;
+	}
+	i2c_put_adapter(adap);
+
+	/* Update board info. */
+	sn2201_dev = nvsw_sn2201->sn2201_devs;
+	for (i = 0; i < nvsw_sn2201->sn2201_devs_num; i++, sn2201_dev++) {
+		sn2201_dev->adapter = i2c_get_adapter(sn2201_dev->nr);
+		if (!sn2201_dev->adapter)
+			return -ENODEV;
+		i2c_put_adapter(sn2201_dev->adapter);
+	}
+
+	err = nvsw_sn2201_create_static_devices(nvsw_sn2201, nvsw_sn2201->sn2201_devs,
+						nvsw_sn2201->sn2201_devs_num);
+	if (err)
+		dev_err(dev, "Failed to create static devices\n");
+
+	return err;
+}
+
+static int nvsw_sn2201_config_init(struct nvsw_sn2201 *nvsw_sn2201, void *regmap)
+{
+	struct device *dev = nvsw_sn2201->dev;
+	int err;
+
+	nvsw_sn2201->io_data = &nvsw_sn2201_regs_io;
+	nvsw_sn2201->led_data = &nvsw_sn2201_led;
+	nvsw_sn2201->wd_data = &nvsw_sn2201_wd;
+	nvsw_sn2201->hotplug_data = &nvsw_sn2201_hotplug;
+
+	/* Register IO access driver. */
+	if (nvsw_sn2201->io_data) {
+		nvsw_sn2201->io_data->regmap = regmap;
+		nvsw_sn2201->io_regs =
+		platform_device_register_resndata(dev, "mlxreg-io", PLATFORM_DEVID_NONE, NULL, 0,
+						  nvsw_sn2201->io_data,
+						  sizeof(*nvsw_sn2201->io_data));
+		if (IS_ERR(nvsw_sn2201->io_regs)) {
+			err = PTR_ERR(nvsw_sn2201->io_regs);
+			goto fail_register_io;
+		}
+	}
+
+	/* Register LED driver. */
+	if (nvsw_sn2201->led_data) {
+		nvsw_sn2201->led_data->regmap = regmap;
+		nvsw_sn2201->led =
+		platform_device_register_resndata(dev, "leds-mlxreg", PLATFORM_DEVID_NONE, NULL, 0,
+						  nvsw_sn2201->led_data,
+						  sizeof(*nvsw_sn2201->led_data));
+		if (IS_ERR(nvsw_sn2201->led)) {
+			err = PTR_ERR(nvsw_sn2201->led);
+			goto fail_register_led;
+		}
+	}
+
+	/* Register WD driver. */
+	if (nvsw_sn2201->wd_data) {
+		nvsw_sn2201->wd_data->regmap = regmap;
+		nvsw_sn2201->wd =
+		platform_device_register_resndata(dev, "mlx-wdt", PLATFORM_DEVID_NONE, NULL, 0,
+						  nvsw_sn2201->wd_data,
+						  sizeof(*nvsw_sn2201->wd_data));
+		if (IS_ERR(nvsw_sn2201->wd)) {
+			err = PTR_ERR(nvsw_sn2201->wd);
+			goto fail_register_wd;
+		}
+	}
+
+	/* Register hotplug driver. */
+	if (nvsw_sn2201->hotplug_data) {
+		nvsw_sn2201->hotplug_data->regmap = regmap;
+		nvsw_sn2201->pdev_hotplug =
+		platform_device_register_resndata(dev, "mlxreg-hotplug", PLATFORM_DEVID_NONE,
+						  nvsw_sn2201_cpld_res,
+						  ARRAY_SIZE(nvsw_sn2201_cpld_res),
+						  nvsw_sn2201->hotplug_data,
+						  sizeof(*nvsw_sn2201->hotplug_data));
+		if (IS_ERR(nvsw_sn2201->pdev_hotplug)) {
+			err = PTR_ERR(nvsw_sn2201->pdev_hotplug);
+			goto fail_register_hotplug;
+		}
+	}
+
+	return nvsw_sn2201_config_post_init(nvsw_sn2201);
+
+fail_register_hotplug:
+	if (nvsw_sn2201->wd)
+		platform_device_unregister(nvsw_sn2201->wd);
+fail_register_wd:
+	if (nvsw_sn2201->led)
+		platform_device_unregister(nvsw_sn2201->led);
+fail_register_led:
+	if (nvsw_sn2201->io_regs)
+		platform_device_unregister(nvsw_sn2201->io_regs);
+fail_register_io:
+
+	return err;
+}
+
+static void nvsw_sn2201_config_exit(struct nvsw_sn2201 *nvsw_sn2201)
+{
+	/* Unregister hotplug driver. */
+	if (nvsw_sn2201->pdev_hotplug)
+		platform_device_unregister(nvsw_sn2201->pdev_hotplug);
+	/* Unregister WD driver. */
+	if (nvsw_sn2201->wd)
+		platform_device_unregister(nvsw_sn2201->wd);
+	/* Unregister LED driver. */
+	if (nvsw_sn2201->led)
+		platform_device_unregister(nvsw_sn2201->led);
+	/* Unregister IO access driver. */
+	if (nvsw_sn2201->io_regs)
+		platform_device_unregister(nvsw_sn2201->io_regs);
+}
+
+/*
+ * Initialization is divided into two parts:
+ * - I2C main bus init.
+ * - Mux creation and attaching devices to the mux,
+ *   which assumes that the main bus is already created.
+ * This separation is required for synchronization between these two parts.
+ * Completion notify callback is used to make this flow synchronized.
+ */
+static int nvsw_sn2201_i2c_completion_notify(void *handle, int id)
+{
+	struct nvsw_sn2201 *nvsw_sn2201 = handle;
+	void *regmap;
+	int i, err;
+
+	/* Create main mux. */
+	nvsw_sn2201->main_mux_devs->adapter = i2c_get_adapter(nvsw_sn2201->main_mux_devs->nr);
+	if (!nvsw_sn2201->main_mux_devs->adapter) {
+		err = -ENODEV;
+		dev_err(nvsw_sn2201->dev, "Failed to get adapter for bus %d\n",
+			nvsw_sn2201->cpld_devs->nr);
+		goto i2c_get_adapter_main_fail;
+	}
+
+	nvsw_sn2201->main_mux_devs_num = ARRAY_SIZE(nvsw_sn2201_main_mux_brdinfo);
+	err = nvsw_sn2201_create_static_devices(nvsw_sn2201, nvsw_sn2201->main_mux_devs,
+						nvsw_sn2201->main_mux_devs_num);
+	if (err) {
+		dev_err(nvsw_sn2201->dev, "Failed to create main mux devices\n");
+		goto nvsw_sn2201_create_static_devices_fail;
+	}
+
+	nvsw_sn2201->cpld_devs->adapter = i2c_get_adapter(nvsw_sn2201->cpld_devs->nr);
+	if (!nvsw_sn2201->cpld_devs->adapter) {
+		err = -ENODEV;
+		dev_err(nvsw_sn2201->dev, "Failed to get adapter for bus %d\n",
+			nvsw_sn2201->cpld_devs->nr);
+		goto i2c_get_adapter_fail;
+	}
+
+	/* Create CPLD device. */
+	nvsw_sn2201->cpld_devs->client = i2c_new_dummy_device(nvsw_sn2201->cpld_devs->adapter,
+							      NVSW_SN2201_CPLD_I2CADDR);
+	if (IS_ERR(nvsw_sn2201->cpld_devs->client)) {
+		err = PTR_ERR(nvsw_sn2201->cpld_devs->client);
+		dev_err(nvsw_sn2201->dev, "Failed to create %s cpld device at bus %d at addr 0x%02x\n",
+			nvsw_sn2201->cpld_devs->brdinfo->type, nvsw_sn2201->cpld_devs->nr,
+			nvsw_sn2201->cpld_devs->brdinfo->addr);
+		goto i2c_new_dummy_fail;
+	}
+
+	regmap = devm_regmap_init_i2c(nvsw_sn2201->cpld_devs->client, &nvsw_sn2201_regmap_conf);
+	if (IS_ERR(regmap)) {
+		err = PTR_ERR(regmap);
+		dev_err(nvsw_sn2201->dev, "Failed to initialise managed register map\n");
+		goto devm_regmap_init_i2c_fail;
+	}
+
+	/* Set default registers. */
+	for (i = 0; i < nvsw_sn2201_regmap_conf.num_reg_defaults; i++) {
+		err = regmap_write(regmap, nvsw_sn2201_regmap_default[i].reg,
+				   nvsw_sn2201_regmap_default[i].def);
+		if (err) {
+			dev_err(nvsw_sn2201->dev, "Failed to set register at offset 0x%02x to default value: 0x%02x\n",
+				nvsw_sn2201_regmap_default[i].reg,
+				nvsw_sn2201_regmap_default[i].def);
+			goto regmap_write_fail;
+		}
+	}
+
+	/* Sync registers with hardware. */
+	regcache_mark_dirty(regmap);
+	err = regcache_sync(regmap);
+	if (err) {
+		dev_err(nvsw_sn2201->dev, "Failed to Sync registers with hardware\n");
+		goto regcache_sync_fail;
+	}
+
+	/* Configure SN2201 board. */
+	err = nvsw_sn2201_config_init(nvsw_sn2201, regmap);
+	if (err) {
+		dev_err(nvsw_sn2201->dev, "Failed to configure board\n");
+		goto nvsw_sn2201_config_init_fail;
+	}
+
+	return 0;
+
+nvsw_sn2201_config_init_fail:
+	nvsw_sn2201_config_exit(nvsw_sn2201);
+regcache_sync_fail:
+regmap_write_fail:
+devm_regmap_init_i2c_fail:
+i2c_new_dummy_fail:
+	i2c_put_adapter(nvsw_sn2201->cpld_devs->adapter);
+	nvsw_sn2201->cpld_devs->adapter = NULL;
+i2c_get_adapter_fail:
+	/* Destroy SN2201 static I2C devices. */
+	nvsw_sn2201_destroy_static_devices(nvsw_sn2201, nvsw_sn2201->sn2201_devs,
+					   nvsw_sn2201->sn2201_devs_num);
+	/* Destroy main mux device. */
+	nvsw_sn2201_destroy_static_devices(nvsw_sn2201, nvsw_sn2201->main_mux_devs,
+					   nvsw_sn2201->main_mux_devs_num);
+nvsw_sn2201_create_static_devices_fail:
+	i2c_put_adapter(nvsw_sn2201->main_mux_devs->adapter);
+i2c_get_adapter_main_fail:
+	return err;
+}
+
+static int nvsw_sn2201_config_pre_init(struct nvsw_sn2201 *nvsw_sn2201)
+{
+	nvsw_sn2201->i2c_data = &nvsw_sn2201_i2c_data;
+
+	/* Register I2C controller. */
+	nvsw_sn2201->i2c_data->handle = nvsw_sn2201;
+	nvsw_sn2201->i2c_data->completion_notify = nvsw_sn2201_i2c_completion_notify;
+	nvsw_sn2201->pdev_i2c = platform_device_register_resndata(nvsw_sn2201->dev, "i2c_mlxcpld",
+								  NVSW_SN2201_MAIN_MUX_NR,
+								  nvsw_sn2201_lpc_res,
+								  ARRAY_SIZE(nvsw_sn2201_lpc_res),
+								  nvsw_sn2201->i2c_data,
+								  sizeof(*nvsw_sn2201->i2c_data));
+	if (IS_ERR(nvsw_sn2201->pdev_i2c))
+		return PTR_ERR(nvsw_sn2201->pdev_i2c);
+
+	return 0;
+}
+
+static int nvsw_sn2201_probe(struct platform_device *pdev)
+{
+	struct nvsw_sn2201 *nvsw_sn2201;
+
+	nvsw_sn2201 = devm_kzalloc(&pdev->dev, sizeof(*nvsw_sn2201), GFP_KERNEL);
+	if (!nvsw_sn2201)
+		return -ENOMEM;
+
+	nvsw_sn2201->dev = &pdev->dev;
+	platform_set_drvdata(pdev, nvsw_sn2201);
+	platform_device_add_resources(pdev, nvsw_sn2201_lpc_io_resources,
+				      ARRAY_SIZE(nvsw_sn2201_lpc_io_resources));
+
+	nvsw_sn2201->main_mux_deferred_nr = NVSW_SN2201_MAIN_MUX_DEFER_NR;
+	nvsw_sn2201->main_mux_devs = nvsw_sn2201_main_mux_brdinfo;
+	nvsw_sn2201->cpld_devs = nvsw_sn2201_cpld_brdinfo;
+	nvsw_sn2201->sn2201_devs = nvsw_sn2201_static_brdinfo;
+	nvsw_sn2201->sn2201_devs_num = ARRAY_SIZE(nvsw_sn2201_static_brdinfo);
+
+	return nvsw_sn2201_config_pre_init(nvsw_sn2201);
+}
+
+static int nvsw_sn2201_remove(struct platform_device *pdev)
+{
+	struct nvsw_sn2201 *nvsw_sn2201 = platform_get_drvdata(pdev);
+
+	/* Unregister underlying drivers. */
+	nvsw_sn2201_config_exit(nvsw_sn2201);
+
+	/* Destroy SN2201 static I2C devices. */
+	nvsw_sn2201_destroy_static_devices(nvsw_sn2201,
+					   nvsw_sn2201->sn2201_devs,
+					   nvsw_sn2201->sn2201_devs_num);
+
+	i2c_put_adapter(nvsw_sn2201->cpld_devs->adapter);
+	nvsw_sn2201->cpld_devs->adapter = NULL;
+	/* Destroy main mux device. */
+	nvsw_sn2201_destroy_static_devices(nvsw_sn2201,
+					   nvsw_sn2201->main_mux_devs,
+					   nvsw_sn2201->main_mux_devs_num);
+
+	/* Unregister I2C controller. */
+	if (nvsw_sn2201->pdev_i2c)
+		platform_device_unregister(nvsw_sn2201->pdev_i2c);
+
+	return 0;
+}
+
+static const struct acpi_device_id nvsw_sn2201_acpi_ids[] = {
+	{"NVSN2201", 0},
+	{}
+};
+
+MODULE_DEVICE_TABLE(acpi, nvsw_sn2201_acpi_ids);
+
+static struct platform_driver nvsw_sn2201_driver = {
+	.probe = nvsw_sn2201_probe,
+	.remove = nvsw_sn2201_remove,
+	.driver = {
+		.name = "nvsw-sn2201",
+	.acpi_match_table = nvsw_sn2201_acpi_ids,
+	},
+};
+
+module_platform_driver(nvsw_sn2201_driver);
+
+MODULE_AUTHOR("Nvidia");
+MODULE_DESCRIPTION("Nvidia sn2201 platform driver");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_ALIAS("platform:nvsw-sn2201");

drivers/platform/x86/Kconfig

@@ -1152,6 +1152,14 @@ config SIEMENS_SIMATIC_IPC
 	  To compile this driver as a module, choose M here: the module
 	  will be called simatic-ipc.
 
+config WINMATE_FM07_KEYS
+	tristate "Winmate FM07/FM07P front-panel keys driver"
+	depends on INPUT
+	help
+	  Winmate FM07 and FM07P in-vehicle computers have a row of five
+	  buttons below the display. This module adds an input device
+	  that delivers key events when these buttons are pressed.
+
 endif # X86_PLATFORM_DEVICES
 
 config PMC_ATOM

drivers/platform/x86/Makefile

@@ -130,3 +130,6 @@ obj-$(CONFIG_PMC_ATOM)			+= pmc_atom.o
 
 # Siemens Simatic Industrial PCs
 obj-$(CONFIG_SIEMENS_SIMATIC_IPC)	+= simatic-ipc.o
+
+# Winmate
+obj-$(CONFIG_WINMATE_FM07_KEYS)		+= winmate-fm07-keys.o

drivers/platform/x86/amd-pmc.c

@@ -192,26 +192,6 @@ struct smu_metrics {
 	u64 timecondition_notmet_totaltime[SOC_SUBSYSTEM_IP_MAX];
 } __packed;
 
-static int amd_pmc_get_smu_version(struct amd_pmc_dev *dev)
-{
-	int rc;
-	u32 val;
-
-	rc = amd_pmc_send_cmd(dev, 0, &val, SMU_MSG_GETSMUVERSION, 1);
-	if (rc)
-		return rc;
-
-	dev->smu_program = (val >> 24) & GENMASK(7, 0);
-	dev->major = (val >> 16) & GENMASK(7, 0);
-	dev->minor = (val >> 8) & GENMASK(7, 0);
-	dev->rev = (val >> 0) & GENMASK(7, 0);
-
-	dev_dbg(dev->dev, "SMU program %u version is %u.%u.%u\n",
-		dev->smu_program, dev->major, dev->minor, dev->rev);
-
-	return 0;
-}
-
 static int amd_pmc_stb_debugfs_open(struct inode *inode, struct file *filp)
 {
 	struct amd_pmc_dev *dev = filp->f_inode->i_private;
@@ -294,6 +274,40 @@ static const struct file_operations amd_pmc_stb_debugfs_fops_v2 = {
 	.release = amd_pmc_stb_debugfs_release_v2,
 };
 
+#if defined(CONFIG_SUSPEND) || defined(CONFIG_DEBUG_FS)
+static int amd_pmc_setup_smu_logging(struct amd_pmc_dev *dev)
+{
+	if (dev->cpu_id == AMD_CPU_ID_PCO) {
+		dev_warn_once(dev->dev, "SMU debugging info not supported on this platform\n");
+		return -EINVAL;
+	}
+
+	/* Get Active devices list from SMU */
+	if (!dev->active_ips)
+		amd_pmc_send_cmd(dev, 0, &dev->active_ips, SMU_MSG_GET_SUP_CONSTRAINTS, 1);
+
+	/* Get dram address */
+	if (!dev->smu_virt_addr) {
+		u32 phys_addr_low, phys_addr_hi;
+		u64 smu_phys_addr;
+
+		amd_pmc_send_cmd(dev, 0, &phys_addr_low, SMU_MSG_LOG_GETDRAM_ADDR_LO, 1);
+		amd_pmc_send_cmd(dev, 0, &phys_addr_hi, SMU_MSG_LOG_GETDRAM_ADDR_HI, 1);
+		smu_phys_addr = ((u64)phys_addr_hi << 32 | phys_addr_low);
+
+		dev->smu_virt_addr = devm_ioremap(dev->dev, smu_phys_addr,
+						  sizeof(struct smu_metrics));
+		if (!dev->smu_virt_addr)
+			return -ENOMEM;
+	}
+
+	/* Start the logging */
+	amd_pmc_send_cmd(dev, 0, NULL, SMU_MSG_LOG_RESET, 0);
+	amd_pmc_send_cmd(dev, 0, NULL, SMU_MSG_LOG_START, 0);
+
+	return 0;
+}
+
 static int amd_pmc_idlemask_read(struct amd_pmc_dev *pdev, struct device *dev,
 				 struct seq_file *s)
 {
@@ -321,11 +335,19 @@ static int amd_pmc_idlemask_read(struct amd_pmc_dev *pdev, struct device *dev,
 
 static int get_metrics_table(struct amd_pmc_dev *pdev, struct smu_metrics *table)
 {
+	if (!pdev->smu_virt_addr) {
+		int ret = amd_pmc_setup_smu_logging(pdev);
+
+		if (ret)
+			return ret;
+	}
+
 	if (pdev->cpu_id == AMD_CPU_ID_PCO)
 		return -ENODEV;
 	memcpy_fromio(table, pdev->smu_virt_addr, sizeof(struct smu_metrics));
 	return 0;
 }
+#endif /* CONFIG_SUSPEND || CONFIG_DEBUG_FS */
 
 #ifdef CONFIG_SUSPEND
 static void amd_pmc_validate_deepest(struct amd_pmc_dev *pdev)
@@ -379,6 +401,17 @@ static int s0ix_stats_show(struct seq_file *s, void *unused)
 	struct amd_pmc_dev *dev = s->private;
 	u64 entry_time, exit_time, residency;
 
+	/* Use FCH registers to get the S0ix stats */
+	if (!dev->fch_virt_addr) {
+		u32 base_addr_lo = FCH_BASE_PHY_ADDR_LOW;
+		u32 base_addr_hi = FCH_BASE_PHY_ADDR_HIGH;
+		u64 fch_phys_addr = ((u64)base_addr_hi << 32 | base_addr_lo);
+
+		dev->fch_virt_addr = devm_ioremap(dev->dev, fch_phys_addr, FCH_SSC_MAPPING_SIZE);
+		if (!dev->fch_virt_addr)
+			return -ENOMEM;
+	}
+
 	entry_time = ioread32(dev->fch_virt_addr + FCH_S0I3_ENTRY_TIME_H_OFFSET);
 	entry_time = entry_time << 32 | ioread32(dev->fch_virt_addr + FCH_S0I3_ENTRY_TIME_L_OFFSET);
 
@@ -398,11 +431,38 @@ static int s0ix_stats_show(struct seq_file *s, void *unused)
 }
 DEFINE_SHOW_ATTRIBUTE(s0ix_stats);
 
+static int amd_pmc_get_smu_version(struct amd_pmc_dev *dev)
+{
+	int rc;
+	u32 val;
+
+	rc = amd_pmc_send_cmd(dev, 0, &val, SMU_MSG_GETSMUVERSION, 1);
+	if (rc)
+		return rc;
+
+	dev->smu_program = (val >> 24) & GENMASK(7, 0);
+	dev->major = (val >> 16) & GENMASK(7, 0);
+	dev->minor = (val >> 8) & GENMASK(7, 0);
+	dev->rev = (val >> 0) & GENMASK(7, 0);
+
+	dev_dbg(dev->dev, "SMU program %u version is %u.%u.%u\n",
+		dev->smu_program, dev->major, dev->minor, dev->rev);
+
+	return 0;
+}
+
 static int amd_pmc_idlemask_show(struct seq_file *s, void *unused)
 {
 	struct amd_pmc_dev *dev = s->private;
 	int rc;
 
+	/* we haven't yet read SMU version */
+	if (!dev->major) {
+		rc = amd_pmc_get_smu_version(dev);
+		if (rc)
+			return rc;
+	}
+
 	if (dev->major > 56 || (dev->major >= 55 && dev->minor >= 37)) {
 		rc = amd_pmc_idlemask_read(dev, NULL, s);
 		if (rc)
@@ -449,32 +509,6 @@ static inline void amd_pmc_dbgfs_unregister(struct amd_pmc_dev *dev)
 }
 #endif /* CONFIG_DEBUG_FS */
 
-static int amd_pmc_setup_smu_logging(struct amd_pmc_dev *dev)
-{
-	u32 phys_addr_low, phys_addr_hi;
-	u64 smu_phys_addr;
-
-	if (dev->cpu_id == AMD_CPU_ID_PCO)
-		return -EINVAL;
-
-	/* Get Active devices list from SMU */
-	amd_pmc_send_cmd(dev, 0, &dev->active_ips, SMU_MSG_GET_SUP_CONSTRAINTS, 1);
-
-	/* Get dram address */
-	amd_pmc_send_cmd(dev, 0, &phys_addr_low, SMU_MSG_LOG_GETDRAM_ADDR_LO, 1);
-	amd_pmc_send_cmd(dev, 0, &phys_addr_hi, SMU_MSG_LOG_GETDRAM_ADDR_HI, 1);
-	smu_phys_addr = ((u64)phys_addr_hi << 32 | phys_addr_low);
-
-	dev->smu_virt_addr = devm_ioremap(dev->dev, smu_phys_addr, sizeof(struct smu_metrics));
-	if (!dev->smu_virt_addr)
-		return -ENOMEM;
-
-	/* Start the logging */
-	amd_pmc_send_cmd(dev, 0, NULL, SMU_MSG_LOG_START, 0);
-
-	return 0;
-}
-
 static void amd_pmc_dump_registers(struct amd_pmc_dev *dev)
 {
 	u32 value, message, argument, response;
@@ -639,8 +673,7 @@ static void amd_pmc_s2idle_prepare(void)
 	u32 arg = 1;
 
 	/* Reset and Start SMU logging - to monitor the s0i3 stats */
-	amd_pmc_send_cmd(pdev, 0, NULL, SMU_MSG_LOG_RESET, 0);
-	amd_pmc_send_cmd(pdev, 0, NULL, SMU_MSG_LOG_START, 0);
+	amd_pmc_setup_smu_logging(pdev);
 
 	/* Activate CZN specific RTC functionality */
 	if (pdev->cpu_id == AMD_CPU_ID_CZN) {
@@ -790,7 +823,7 @@ static int amd_pmc_probe(struct platform_device *pdev)
 	struct amd_pmc_dev *dev = &pmc;
 	struct pci_dev *rdev;
 	u32 base_addr_lo, base_addr_hi;
-	u64 base_addr, fch_phys_addr;
+	u64 base_addr;
 	int err;
 	u32 val;
 
@@ -844,28 +877,12 @@ static int amd_pmc_probe(struct platform_device *pdev)
 
 	mutex_init(&dev->lock);
 
-	/* Use FCH registers to get the S0ix stats */
-	base_addr_lo = FCH_BASE_PHY_ADDR_LOW;
-	base_addr_hi = FCH_BASE_PHY_ADDR_HIGH;
-	fch_phys_addr = ((u64)base_addr_hi << 32 | base_addr_lo);
-	dev->fch_virt_addr = devm_ioremap(dev->dev, fch_phys_addr, FCH_SSC_MAPPING_SIZE);
-	if (!dev->fch_virt_addr) {
-		err = -ENOMEM;
-		goto err_pci_dev_put;
-	}
-
-	/* Use SMU to get the s0i3 debug stats */
-	err = amd_pmc_setup_smu_logging(dev);
-	if (err)
-		dev_err(dev->dev, "SMU debugging info not supported on this platform\n");
-
 	if (enable_stb && dev->cpu_id == AMD_CPU_ID_YC) {
 		err = amd_pmc_s2d_init(dev);
 		if (err)
 			return err;
 	}
 
-	amd_pmc_get_smu_version(dev);
 	platform_set_drvdata(pdev, dev);
 #ifdef CONFIG_SUSPEND
 	err = acpi_register_lps0_dev(&amd_pmc_s2idle_dev_ops);

drivers/platform/x86/asus-nb-wmi.c

@@ -553,6 +553,7 @@ static const struct key_entry asus_nb_wmi_keymap[] = {
 	{ KE_KEY, 0x7D, { KEY_BLUETOOTH } }, /* Bluetooth Enable */
 	{ KE_KEY, 0x7E, { KEY_BLUETOOTH } }, /* Bluetooth Disable */
 	{ KE_KEY, 0x82, { KEY_CAMERA } },
+	{ KE_KEY, 0x86, { KEY_PROG1 } }, /* MyASUS Key */
 	{ KE_KEY, 0x88, { KEY_RFKILL  } }, /* Radio Toggle Key */
 	{ KE_KEY, 0x8A, { KEY_PROG1 } }, /* Color enhancement mode */
 	{ KE_KEY, 0x8C, { KEY_SWITCHVIDEOMODE } }, /* SDSP DVI only */

drivers/platform/x86/asus-wmi.c

@@ -2534,7 +2534,7 @@ static struct attribute *asus_fan_curve_attr[] = {
 static umode_t asus_fan_curve_is_visible(struct kobject *kobj,
 					 struct attribute *attr, int idx)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct asus_wmi *asus = dev_get_drvdata(dev->parent);
 
 	/*
@@ -3114,7 +3114,7 @@ static void asus_wmi_handle_event_code(int code, struct asus_wmi *asus)
 
 	if (!sparse_keymap_report_event(asus->inputdev, code,
 					key_value, autorelease))
-		pr_info("Unknown key %x pressed\n", code);
+		pr_info("Unknown key code 0x%x\n", code);
 }
 
 static void asus_wmi_notify(u32 value, void *context)

drivers/platform/x86/dell/dcdbas.c

@@ -40,13 +40,10 @@
 
 static struct platform_device *dcdbas_pdev;
 
-static u8 *smi_data_buf;
-static dma_addr_t smi_data_buf_handle;
-static unsigned long smi_data_buf_size;
 static unsigned long max_smi_data_buf_size = MAX_SMI_DATA_BUF_SIZE;
-static u32 smi_data_buf_phys_addr;
 static DEFINE_MUTEX(smi_data_lock);
 static u8 *bios_buffer;
+static struct smi_buffer smi_buf;
 
 static unsigned int host_control_action;
 static unsigned int host_control_smi_type;
@@ -54,23 +51,49 @@ static unsigned int host_control_on_shutdown;
 
 static bool wsmt_enabled;
 
+int dcdbas_smi_alloc(struct smi_buffer *smi_buffer, unsigned long size)
+{
+	smi_buffer->virt = dma_alloc_coherent(&dcdbas_pdev->dev, size,
+					      &smi_buffer->dma, GFP_KERNEL);
+	if (!smi_buffer->virt) {
+		dev_dbg(&dcdbas_pdev->dev,
+			"%s: failed to allocate memory size %lu\n",
+			__func__, size);
+		return -ENOMEM;
+	}
+	smi_buffer->size = size;
+
+	dev_dbg(&dcdbas_pdev->dev, "%s: phys: %x size: %lu\n",
+		__func__, (u32)smi_buffer->dma, smi_buffer->size);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dcdbas_smi_alloc);
+
+void dcdbas_smi_free(struct smi_buffer *smi_buffer)
+{
+	if (!smi_buffer->virt)
+		return;
+
+	dev_dbg(&dcdbas_pdev->dev, "%s: phys: %x size: %lu\n",
+		__func__, (u32)smi_buffer->dma, smi_buffer->size);
+	dma_free_coherent(&dcdbas_pdev->dev, smi_buffer->size,
+			  smi_buffer->virt, smi_buffer->dma);
+	smi_buffer->virt = NULL;
+	smi_buffer->dma = 0;
+	smi_buffer->size = 0;
+}
+EXPORT_SYMBOL_GPL(dcdbas_smi_free);
+
 /**
  * smi_data_buf_free: free SMI data buffer
  */
 static void smi_data_buf_free(void)
 {
-	if (!smi_data_buf || wsmt_enabled)
+	if (!smi_buf.virt || wsmt_enabled)
 		return;
 
-	dev_dbg(&dcdbas_pdev->dev, "%s: phys: %x size: %lu\n",
-		__func__, smi_data_buf_phys_addr, smi_data_buf_size);
-
-	dma_free_coherent(&dcdbas_pdev->dev, smi_data_buf_size, smi_data_buf,
-			  smi_data_buf_handle);
-	smi_data_buf = NULL;
-	smi_data_buf_handle = 0;
-	smi_data_buf_phys_addr = 0;
-	smi_data_buf_size = 0;
+	dcdbas_smi_free(&smi_buf);
 }
 
 /**
@@ -78,39 +101,29 @@ static void smi_data_buf_free(void)
  */
 static int smi_data_buf_realloc(unsigned long size)
 {
-	void *buf;
-	dma_addr_t handle;
+	struct smi_buffer tmp;
+	int ret;
 
-	if (smi_data_buf_size >= size)
+	if (smi_buf.size >= size)
 		return 0;
 
 	if (size > max_smi_data_buf_size)
 		return -EINVAL;
 
 	/* new buffer is needed */
-	buf = dma_alloc_coherent(&dcdbas_pdev->dev, size, &handle, GFP_KERNEL);
-	if (!buf) {
-		dev_dbg(&dcdbas_pdev->dev,
-			"%s: failed to allocate memory size %lu\n",
-			__func__, size);
-		return -ENOMEM;
-	}
-	/* memory zeroed by dma_alloc_coherent */
+	ret = dcdbas_smi_alloc(&tmp, size);
+	if (ret)
+		return ret;
 
-	if (smi_data_buf)
-		memcpy(buf, smi_data_buf, smi_data_buf_size);
+	/* memory zeroed by dma_alloc_coherent */
+	if (smi_buf.virt)
+		memcpy(tmp.virt, smi_buf.virt, smi_buf.size);
 
 	/* free any existing buffer */
 	smi_data_buf_free();
 
 	/* set up new buffer for use */
-	smi_data_buf = buf;
-	smi_data_buf_handle = handle;
-	smi_data_buf_phys_addr = (u32) virt_to_phys(buf);
-	smi_data_buf_size = size;
-
-	dev_dbg(&dcdbas_pdev->dev, "%s: phys: %x size: %lu\n",
-		__func__, smi_data_buf_phys_addr, smi_data_buf_size);
+	smi_buf = tmp;
 
 	return 0;
 }
@@ -119,14 +132,14 @@ static ssize_t smi_data_buf_phys_addr_show(struct device *dev,
 					   struct device_attribute *attr,
 					   char *buf)
 {
-	return sprintf(buf, "%x\n", smi_data_buf_phys_addr);
+	return sprintf(buf, "%x\n", (u32)smi_buf.dma);
 }
 
 static ssize_t smi_data_buf_size_show(struct device *dev,
 				      struct device_attribute *attr,
 				      char *buf)
 {
-	return sprintf(buf, "%lu\n", smi_data_buf_size);
+	return sprintf(buf, "%lu\n", smi_buf.size);
 }
 
 static ssize_t smi_data_buf_size_store(struct device *dev,
@@ -155,8 +168,8 @@ static ssize_t smi_data_read(struct file *filp, struct kobject *kobj,
 	ssize_t ret;
 
 	mutex_lock(&smi_data_lock);
-	ret = memory_read_from_buffer(buf, count, &pos, smi_data_buf,
-					smi_data_buf_size);
+	ret = memory_read_from_buffer(buf, count, &pos, smi_buf.virt,
+					smi_buf.size);
 	mutex_unlock(&smi_data_lock);
 	return ret;
 }
@@ -176,7 +189,7 @@ static ssize_t smi_data_write(struct file *filp, struct kobject *kobj,
 	if (ret)
 		goto out;
 
-	memcpy(smi_data_buf + pos, buf, count);
+	memcpy(smi_buf.virt + pos, buf, count);
 	ret = count;
 out:
 	mutex_unlock(&smi_data_lock);
@@ -307,11 +320,11 @@ static ssize_t smi_request_store(struct device *dev,
 
 	mutex_lock(&smi_data_lock);
 
-	if (smi_data_buf_size < sizeof(struct smi_cmd)) {
+	if (smi_buf.size < sizeof(struct smi_cmd)) {
 		ret = -ENODEV;
 		goto out;
 	}
-	smi_cmd = (struct smi_cmd *)smi_data_buf;
+	smi_cmd = (struct smi_cmd *)smi_buf.virt;
 
 	switch (val) {
 	case 2:
@@ -327,20 +340,20 @@ static ssize_t smi_request_store(struct device *dev,
 		 * Provide physical address of command buffer field within
 		 * the struct smi_cmd to BIOS.
 		 *
-		 * Because the address that smi_cmd (smi_data_buf) points to
+		 * Because the address that smi_cmd (smi_buf.virt) points to
 		 * will be from memremap() of a non-memory address if WSMT
 		 * is present, we can't use virt_to_phys() on smi_cmd, so
 		 * we have to use the physical address that was saved when
 		 * the virtual address for smi_cmd was received.
 		 */
-		smi_cmd->ebx = smi_data_buf_phys_addr +
+		smi_cmd->ebx = (u32)smi_buf.dma +
 				offsetof(struct smi_cmd, command_buffer);
 		ret = dcdbas_smi_request(smi_cmd);
 		if (!ret)
 			ret = count;
 		break;
 	case 0:
-		memset(smi_data_buf, 0, smi_data_buf_size);
+		memset(smi_buf.virt, 0, smi_buf.size);
 		ret = count;
 		break;
 	default:
@@ -356,7 +369,7 @@ static ssize_t smi_request_store(struct device *dev,
 /**
  * host_control_smi: generate host control SMI
  *
- * Caller must set up the host control command in smi_data_buf.
+ * Caller must set up the host control command in smi_buf.virt.
  */
 static int host_control_smi(void)
 {
@@ -367,14 +380,14 @@ static int host_control_smi(void)
 	s8 cmd_status;
 	u8 index;
 
-	apm_cmd = (struct apm_cmd *)smi_data_buf;
+	apm_cmd = (struct apm_cmd *)smi_buf.virt;
 	apm_cmd->status = ESM_STATUS_CMD_UNSUCCESSFUL;
 
 	switch (host_control_smi_type) {
 	case HC_SMITYPE_TYPE1:
 		spin_lock_irqsave(&rtc_lock, flags);
 		/* write SMI data buffer physical address */
-		data = (u8 *)&smi_data_buf_phys_addr;
+		data = (u8 *)&smi_buf.dma;
 		for (index = PE1300_CMOS_CMD_STRUCT_PTR;
 		     index < (PE1300_CMOS_CMD_STRUCT_PTR + 4);
 		     index++, data++) {
@@ -405,7 +418,7 @@ static int host_control_smi(void)
 	case HC_SMITYPE_TYPE3:
 		spin_lock_irqsave(&rtc_lock, flags);
 		/* write SMI data buffer physical address */
-		data = (u8 *)&smi_data_buf_phys_addr;
+		data = (u8 *)&smi_buf.dma;
 		for (index = PE1400_CMOS_CMD_STRUCT_PTR;
 		     index < (PE1400_CMOS_CMD_STRUCT_PTR + 4);
 		     index++, data++) {
@@ -450,7 +463,7 @@ static int host_control_smi(void)
  * This function is called by the driver after the system has
  * finished shutting down if the user application specified a
  * host control action to perform on shutdown.  It is safe to
- * use smi_data_buf at this point because the system has finished
+ * use smi_buf.virt at this point because the system has finished
  * shutting down and no userspace apps are running.
  */
 static void dcdbas_host_control(void)
@@ -464,18 +477,18 @@ static void dcdbas_host_control(void)
 	action = host_control_action;
 	host_control_action = HC_ACTION_NONE;
 
-	if (!smi_data_buf) {
+	if (!smi_buf.virt) {
 		dev_dbg(&dcdbas_pdev->dev, "%s: no SMI buffer\n", __func__);
 		return;
 	}
 
-	if (smi_data_buf_size < sizeof(struct apm_cmd)) {
+	if (smi_buf.size < sizeof(struct apm_cmd)) {
 		dev_dbg(&dcdbas_pdev->dev, "%s: SMI buffer too small\n",
 			__func__);
 		return;
 	}
 
-	apm_cmd = (struct apm_cmd *)smi_data_buf;
+	apm_cmd = (struct apm_cmd *)smi_buf.virt;
 
 	/* power off takes precedence */
 	if (action & HC_ACTION_HOST_CONTROL_POWEROFF) {
@@ -583,11 +596,11 @@ static int dcdbas_check_wsmt(void)
 		return -ENOMEM;
 	}
 
-	/* First 8 bytes is for a semaphore, not part of the smi_data_buf */
-	smi_data_buf_phys_addr = bios_buf_paddr + 8;
-	smi_data_buf = bios_buffer + 8;
-	smi_data_buf_size = remap_size - 8;
-	max_smi_data_buf_size = smi_data_buf_size;
+	/* First 8 bytes is for a semaphore, not part of the smi_buf.virt */
+	smi_buf.dma = bios_buf_paddr + 8;
+	smi_buf.virt = bios_buffer + 8;
+	smi_buf.size = remap_size - 8;
+	max_smi_data_buf_size = smi_buf.size;
 	wsmt_enabled = true;
 	dev_info(&dcdbas_pdev->dev,
 		 "WSMT found, using firmware-provided SMI buffer.\n");

drivers/platform/x86/dell/dcdbas.h

@@ -105,5 +105,14 @@ struct smm_eps_table {
 	u64 num_of_4k_pages;
 } __packed;
 
+struct smi_buffer {
+	u8 *virt;
+	unsigned long size;
+	dma_addr_t dma;
+};
+
+int dcdbas_smi_alloc(struct smi_buffer *smi_buffer, unsigned long size);
+void dcdbas_smi_free(struct smi_buffer *smi_buffer);
+
 #endif /* _DCDBAS_H_ */
 

drivers/platform/x86/dell/dell-smbios-smm.c

@@ -20,6 +20,7 @@
 
 static int da_command_address;
 static int da_command_code;
+static struct smi_buffer smi_buf;
 static struct calling_interface_buffer *buffer;
 static struct platform_device *platform_device;
 static DEFINE_MUTEX(smm_mutex);
@@ -57,7 +58,7 @@ static int dell_smbios_smm_call(struct calling_interface_buffer *input)
 	command.magic = SMI_CMD_MAGIC;
 	command.command_address = da_command_address;
 	command.command_code = da_command_code;
-	command.ebx = virt_to_phys(buffer);
+	command.ebx = smi_buf.dma;
 	command.ecx = 0x42534931;
 
 	mutex_lock(&smm_mutex);
@@ -101,9 +102,10 @@ int init_dell_smbios_smm(void)
 	 * Allocate buffer below 4GB for SMI data--only 32-bit physical addr
 	 * is passed to SMI handler.
 	 */
-	buffer = (void *)__get_free_page(GFP_KERNEL | GFP_DMA32);
-	if (!buffer)
-		return -ENOMEM;
+	ret = dcdbas_smi_alloc(&smi_buf, PAGE_SIZE);
+	if (ret)
+		return ret;
+	buffer = (void *)smi_buf.virt;
 
 	dmi_walk(find_cmd_address, NULL);
 
@@ -138,7 +140,7 @@ int init_dell_smbios_smm(void)
 
 fail_wsmt:
 fail_platform_device_alloc:
-	free_page((unsigned long)buffer);
+	dcdbas_smi_free(&smi_buf);
 	return ret;
 }
 
@@ -147,6 +149,6 @@ void exit_dell_smbios_smm(void)
 	if (platform_device) {
 		dell_smbios_unregister_device(&platform_device->dev);
 		platform_device_unregister(platform_device);
-		free_page((unsigned long)buffer);
+		dcdbas_smi_free(&smi_buf);
 	}
 }

drivers/platform/x86/gigabyte-wmi.c

@@ -150,7 +150,9 @@ static const struct dmi_system_id gigabyte_wmi_known_working_platforms[] = {
 	DMI_EXACT_MATCH_GIGABYTE_BOARD_NAME("B550M DS3H"),
 	DMI_EXACT_MATCH_GIGABYTE_BOARD_NAME("B660 GAMING X DDR4"),
 	DMI_EXACT_MATCH_GIGABYTE_BOARD_NAME("Z390 I AORUS PRO WIFI-CF"),
+	DMI_EXACT_MATCH_GIGABYTE_BOARD_NAME("Z490 AORUS ELITE AC"),
 	DMI_EXACT_MATCH_GIGABYTE_BOARD_NAME("X570 AORUS ELITE"),
+	DMI_EXACT_MATCH_GIGABYTE_BOARD_NAME("X570 AORUS ELITE WIFI"),
 	DMI_EXACT_MATCH_GIGABYTE_BOARD_NAME("X570 GAMING X"),
 	DMI_EXACT_MATCH_GIGABYTE_BOARD_NAME("X570 I AORUS PRO WIFI"),
 	DMI_EXACT_MATCH_GIGABYTE_BOARD_NAME("X570 UD"),

drivers/platform/x86/hp-wmi.c

@@ -605,6 +605,7 @@ static int hp_wmi_rfkill2_refresh(void)
 	for (i = 0; i < rfkill2_count; i++) {
 		int num = rfkill2[i].num;
 		struct bios_rfkill2_device_state *devstate;
+
 		devstate = &state.device[num];
 
 		if (num >= state.count ||
@@ -625,6 +626,7 @@ static ssize_t display_show(struct device *dev, struct device_attribute *attr,
 			    char *buf)
 {
 	int value = hp_wmi_read_int(HPWMI_DISPLAY_QUERY);
+
 	if (value < 0)
 		return value;
 	return sprintf(buf, "%d\n", value);
@@ -634,6 +636,7 @@ static ssize_t hddtemp_show(struct device *dev, struct device_attribute *attr,
 			    char *buf)
 {
 	int value = hp_wmi_read_int(HPWMI_HDDTEMP_QUERY);
+
 	if (value < 0)
 		return value;
 	return sprintf(buf, "%d\n", value);
@@ -643,6 +646,7 @@ static ssize_t als_show(struct device *dev, struct device_attribute *attr,
 			char *buf)
 {
 	int value = hp_wmi_read_int(HPWMI_ALS_QUERY);
+
 	if (value < 0)
 		return value;
 	return sprintf(buf, "%d\n", value);
@@ -652,6 +656,7 @@ static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
 			 char *buf)
 {
 	int value = hp_wmi_get_dock_state();
+
 	if (value < 0)
 		return value;
 	return sprintf(buf, "%d\n", value);
@@ -661,6 +666,7 @@ static ssize_t tablet_show(struct device *dev, struct device_attribute *attr,
 			   char *buf)
 {
 	int value = hp_wmi_get_tablet_mode();
+
 	if (value < 0)
 		return value;
 	return sprintf(buf, "%d\n", value);
@@ -671,6 +677,7 @@ static ssize_t postcode_show(struct device *dev, struct device_attribute *attr,
 {
 	/* Get the POST error code of previous boot failure. */
 	int value = hp_wmi_read_int(HPWMI_POSTCODEERROR_QUERY);
+
 	if (value < 0)
 		return value;
 	return sprintf(buf, "0x%x\n", value);
@@ -1013,6 +1020,7 @@ static int __init hp_wmi_rfkill2_setup(struct platform_device *device)
 		struct rfkill *rfkill;
 		enum rfkill_type type;
 		char *name;
+
 		switch (state.device[i].radio_type) {
 		case HPWMI_WIFI:
 			type = RFKILL_TYPE_WLAN;

drivers/platform/x86/intel/Kconfig

@@ -4,6 +4,7 @@
 #
 
 source "drivers/platform/x86/intel/atomisp2/Kconfig"
+source "drivers/platform/x86/intel/ifs/Kconfig"
 source "drivers/platform/x86/intel/int1092/Kconfig"
 source "drivers/platform/x86/intel/int3472/Kconfig"
 source "drivers/platform/x86/intel/pmc/Kconfig"

drivers/platform/x86/intel/Makefile

@@ -5,6 +5,7 @@
 #
 
 obj-$(CONFIG_INTEL_ATOMISP2_PDX86)	+= atomisp2/
+obj-$(CONFIG_INTEL_IFS)			+= ifs/
 obj-$(CONFIG_INTEL_SAR_INT1092)		+= int1092/
 obj-$(CONFIG_INTEL_SKL_INT3472)		+= int3472/
 obj-$(CONFIG_INTEL_PMC_CORE)		+= pmc/

drivers/platform/x86/intel/chtwc_int33fe.c

@@ -389,6 +389,8 @@ static int cht_int33fe_typec_probe(struct platform_device *pdev)
 		goto out_unregister_fusb302;
 	}
 
+	platform_set_drvdata(pdev, data);
+
 	return 0;
 
 out_unregister_fusb302:

drivers/platform/x86/intel/hid.c

@@ -238,7 +238,7 @@ static bool intel_hid_evaluate_method(acpi_handle handle,
 
 	method_name = (char *)intel_hid_dsm_fn_to_method[fn_index];
 
-	if (!(intel_hid_dsm_fn_mask & fn_index))
+	if (!(intel_hid_dsm_fn_mask & BIT(fn_index)))
 		goto skip_dsm_eval;
 
 	obj = acpi_evaluate_dsm_typed(handle, &intel_dsm_guid,

drivers/platform/x86/intel/ifs/Kconfig

+config INTEL_IFS
+	tristate "Intel In Field Scan"
+	depends on X86 && CPU_SUP_INTEL && 64BIT && SMP
+	select INTEL_IFS_DEVICE
+	help
+	  Enable support for the In Field Scan capability in select
+	  CPUs. The capability allows for running low level tests via
+	  a scan image distributed by Intel via Github to validate CPU
+	  operation beyond baseline RAS capabilities. To compile this
+	  support as a module, choose M here. The module will be called
+	  intel_ifs.
+
+	  If unsure, say N.

drivers/platform/x86/intel/ifs/Makefile

+obj-$(CONFIG_INTEL_IFS)		+= intel_ifs.o
+
+intel_ifs-objs			:= core.o load.o runtest.o sysfs.o

drivers/platform/x86/intel/ifs/core.c

+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2022 Intel Corporation. */
+
+#include <linux/module.h>
+#include <linux/kdev_t.h>
+#include <linux/semaphore.h>
+
+#include <asm/cpu_device_id.h>
+
+#include "ifs.h"
+
+#define X86_MATCH(model)				\
+	X86_MATCH_VENDOR_FAM_MODEL_FEATURE(INTEL, 6,	\
+		INTEL_FAM6_##model, X86_FEATURE_CORE_CAPABILITIES, NULL)
+
+static const struct x86_cpu_id ifs_cpu_ids[] __initconst = {
+	X86_MATCH(SAPPHIRERAPIDS_X),
+	{}
+};
+MODULE_DEVICE_TABLE(x86cpu, ifs_cpu_ids);
+
+static struct ifs_device ifs_device = {
+	.data = {
+		.integrity_cap_bit = MSR_INTEGRITY_CAPS_PERIODIC_BIST_BIT,
+	},
+	.misc = {
+		.name = "intel_ifs_0",
+		.nodename = "intel_ifs/0",
+		.minor = MISC_DYNAMIC_MINOR,
+	},
+};
+
+static int __init ifs_init(void)
+{
+	const struct x86_cpu_id *m;
+	u64 msrval;
+
+	m = x86_match_cpu(ifs_cpu_ids);
+	if (!m)
+		return -ENODEV;
+
+	if (rdmsrl_safe(MSR_IA32_CORE_CAPS, &msrval))
+		return -ENODEV;
+
+	if (!(msrval & MSR_IA32_CORE_CAPS_INTEGRITY_CAPS))
+		return -ENODEV;
+
+	if (rdmsrl_safe(MSR_INTEGRITY_CAPS, &msrval))
+		return -ENODEV;
+
+	ifs_device.misc.groups = ifs_get_groups();
+
+	if ((msrval & BIT(ifs_device.data.integrity_cap_bit)) &&
+	    !misc_register(&ifs_device.misc)) {
+		down(&ifs_sem);
+		ifs_load_firmware(ifs_device.misc.this_device);
+		up(&ifs_sem);
+		return 0;
+	}
+
+	return -ENODEV;
+}
+
+static void __exit ifs_exit(void)
+{
+	misc_deregister(&ifs_device.misc);
+}
+
+module_init(ifs_init);
+module_exit(ifs_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Intel In Field Scan (IFS) device");

drivers/platform/x86/intel/ifs/ifs.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/* Copyright(c) 2022 Intel Corporation. */
+
+#ifndef _IFS_H_
+#define _IFS_H_
+
+/**
+ * DOC: In-Field Scan
+ *
+ * =============
+ * In-Field Scan
+ * =============
+ *
+ * Introduction
+ * ------------
+ *
+ * In Field Scan (IFS) is a hardware feature to run circuit level tests on
+ * a CPU core to detect problems that are not caught by parity or ECC checks.
+ * Future CPUs will support more than one type of test which will show up
+ * with a new platform-device instance-id, for now only .0 is exposed.
+ *
+ *
+ * IFS Image
+ * ---------
+ *
+ * Intel provides a firmware file containing the scan tests via
+ * github [#f1]_.  Similar to microcode there is a separate file for each
+ * family-model-stepping.
+ *
+ * IFS Image Loading
+ * -----------------
+ *
+ * The driver loads the tests into memory reserved BIOS local to each CPU
+ * socket in a two step process using writes to MSRs to first load the
+ * SHA hashes for the test. Then the tests themselves. Status MSRs provide
+ * feedback on the success/failure of these steps. When a new test file
+ * is installed it can be loaded by writing to the driver reload file::
+ *
+ *   # echo 1 > /sys/devices/virtual/misc/intel_ifs_0/reload
+ *
+ * Similar to microcode, the current version of the scan tests is stored
+ * in a fixed location: /lib/firmware/intel/ifs.0/family-model-stepping.scan
+ *
+ * Running tests
+ * -------------
+ *
+ * Tests are run by the driver synchronizing execution of all threads on a
+ * core and then writing to the ACTIVATE_SCAN MSR on all threads. Instruction
+ * execution continues when:
+ *
+ * 1) All tests have completed.
+ * 2) Execution was interrupted.
+ * 3) A test detected a problem.
+ *
+ * Note that ALL THREADS ON THE CORE ARE EFFECTIVELY OFFLINE FOR THE
+ * DURATION OF THE TEST. This can be up to 200 milliseconds. If the system
+ * is running latency sensitive applications that cannot tolerate an
+ * interruption of this magnitude, the system administrator must arrange
+ * to migrate those applications to other cores before running a core test.
+ * It may also be necessary to redirect interrupts to other CPUs.
+ *
+ * In all cases reading the SCAN_STATUS MSR provides details on what
+ * happened. The driver makes the value of this MSR visible to applications
+ * via the "details" file (see below). Interrupted tests may be restarted.
+ *
+ * The IFS driver provides sysfs interfaces via /sys/devices/virtual/misc/intel_ifs_0/
+ * to control execution:
+ *
+ * Test a specific core::
+ *
+ *   # echo <cpu#> > /sys/devices/virtual/misc/intel_ifs_0/run_test
+ *
+ * when HT is enabled any of the sibling cpu# can be specified to test
+ * its corresponding physical core. Since the tests are per physical core,
+ * the result of testing any thread is same. All siblings must be online
+ * to run a core test. It is only necessary to test one thread.
+ *
+ * For e.g. to test core corresponding to cpu5
+ *
+ *   # echo 5 > /sys/devices/virtual/misc/intel_ifs_0/run_test
+ *
+ * Results of the last test is provided in /sys::
+ *
+ *   $ cat /sys/devices/virtual/misc/intel_ifs_0/status
+ *   pass
+ *
+ * Status can be one of pass, fail, untested
+ *
+ * Additional details of the last test is provided by the details file::
+ *
+ *   $ cat /sys/devices/virtual/misc/intel_ifs_0/details
+ *   0x8081
+ *
+ * The details file reports the hex value of the SCAN_STATUS MSR.
+ * Hardware defined error codes are documented in volume 4 of the Intel
+ * Software Developer's Manual but the error_code field may contain one of
+ * the following driver defined software codes:
+ *
+ * +------+--------------------+
+ * | 0xFD | Software timeout   |
+ * +------+--------------------+
+ * | 0xFE | Partial completion |
+ * +------+--------------------+
+ *
+ * Driver design choices
+ * ---------------------
+ *
+ * 1) The ACTIVATE_SCAN MSR allows for running any consecutive subrange of
+ * available tests. But the driver always tries to run all tests and only
+ * uses the subrange feature to restart an interrupted test.
+ *
+ * 2) Hardware allows for some number of cores to be tested in parallel.
+ * The driver does not make use of this, it only tests one core at a time.
+ *
+ * .. [#f1] https://github.com/intel/TBD
+ */
+#include <linux/device.h>
+#include <linux/miscdevice.h>
+
+#define MSR_COPY_SCAN_HASHES			0x000002c2
+#define MSR_SCAN_HASHES_STATUS			0x000002c3
+#define MSR_AUTHENTICATE_AND_COPY_CHUNK		0x000002c4
+#define MSR_CHUNKS_AUTHENTICATION_STATUS	0x000002c5
+#define MSR_ACTIVATE_SCAN			0x000002c6
+#define MSR_SCAN_STATUS				0x000002c7
+#define SCAN_NOT_TESTED				0
+#define SCAN_TEST_PASS				1
+#define SCAN_TEST_FAIL				2
+
+/* MSR_SCAN_HASHES_STATUS bit fields */
+union ifs_scan_hashes_status {
+	u64	data;
+	struct {
+		u32	chunk_size	:16;
+		u32	num_chunks	:8;
+		u32	rsvd1		:8;
+		u32	error_code	:8;
+		u32	rsvd2		:11;
+		u32	max_core_limit	:12;
+		u32	valid		:1;
+	};
+};
+
+/* MSR_CHUNKS_AUTH_STATUS bit fields */
+union ifs_chunks_auth_status {
+	u64	data;
+	struct {
+		u32	valid_chunks	:8;
+		u32	total_chunks	:8;
+		u32	rsvd1		:16;
+		u32	error_code	:8;
+		u32	rsvd2		:24;
+	};
+};
+
+/* MSR_ACTIVATE_SCAN bit fields */
+union ifs_scan {
+	u64	data;
+	struct {
+		u32	start	:8;
+		u32	stop	:8;
+		u32	rsvd	:16;
+		u32	delay	:31;
+		u32	sigmce	:1;
+	};
+};
+
+/* MSR_SCAN_STATUS bit fields */
+union ifs_status {
+	u64	data;
+	struct {
+		u32	chunk_num		:8;
+		u32	chunk_stop_index	:8;
+		u32	rsvd1			:16;
+		u32	error_code		:8;
+		u32	rsvd2			:22;
+		u32	control_error		:1;
+		u32	signature_error		:1;
+	};
+};
+
+/*
+ * Driver populated error-codes
+ * 0xFD: Test timed out before completing all the chunks.
+ * 0xFE: not all scan chunks were executed. Maximum forward progress retries exceeded.
+ */
+#define IFS_SW_TIMEOUT				0xFD
+#define IFS_SW_PARTIAL_COMPLETION		0xFE
+
+/**
+ * struct ifs_data - attributes related to intel IFS driver
+ * @integrity_cap_bit: MSR_INTEGRITY_CAPS bit enumerating this test
+ * @loaded_version: stores the currently loaded ifs image version.
+ * @loaded: If a valid test binary has been loaded into the memory
+ * @loading_error: Error occurred on another CPU while loading image
+ * @valid_chunks: number of chunks which could be validated.
+ * @status: it holds simple status pass/fail/untested
+ * @scan_details: opaque scan status code from h/w
+ */
+struct ifs_data {
+	int	integrity_cap_bit;
+	int	loaded_version;
+	bool	loaded;
+	bool	loading_error;
+	int	valid_chunks;
+	int	status;
+	u64	scan_details;
+};
+
+struct ifs_work {
+	struct work_struct w;
+	struct device *dev;
+};
+
+struct ifs_device {
+	struct ifs_data data;
+	struct miscdevice misc;
+};
+
+static inline struct ifs_data *ifs_get_data(struct device *dev)
+{
+	struct miscdevice *m = dev_get_drvdata(dev);
+	struct ifs_device *d = container_of(m, struct ifs_device, misc);
+
+	return &d->data;
+}
+
+void ifs_load_firmware(struct device *dev);
+int do_core_test(int cpu, struct device *dev);
+const struct attribute_group **ifs_get_groups(void);
+
+extern struct semaphore ifs_sem;
+
+#endif

drivers/platform/x86/intel/ifs/load.c

+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2022 Intel Corporation. */
+
+#include <linux/firmware.h>
+#include <asm/cpu.h>
+#include <linux/slab.h>
+#include <asm/microcode_intel.h>
+
+#include "ifs.h"
+
+struct ifs_header {
+	u32 header_ver;
+	u32 blob_revision;
+	u32 date;
+	u32 processor_sig;
+	u32 check_sum;
+	u32 loader_rev;
+	u32 processor_flags;
+	u32 metadata_size;
+	u32 total_size;
+	u32 fusa_info;
+	u64 reserved;
+};
+
+#define IFS_HEADER_SIZE	(sizeof(struct ifs_header))
+static struct ifs_header *ifs_header_ptr;	/* pointer to the ifs image header */
+static u64 ifs_hash_ptr;			/* Address of ifs metadata (hash) */
+static u64 ifs_test_image_ptr;			/* 256B aligned address of test pattern */
+static DECLARE_COMPLETION(ifs_done);
+
+static const char * const scan_hash_status[] = {
+	[0] = "No error reported",
+	[1] = "Attempt to copy scan hashes when copy already in progress",
+	[2] = "Secure Memory not set up correctly",
+	[3] = "FuSaInfo.ProgramID does not match or ff-mm-ss does not match",
+	[4] = "Reserved",
+	[5] = "Integrity check failed",
+	[6] = "Scan reload or test is in progress"
+};
+
+static const char * const scan_authentication_status[] = {
+	[0] = "No error reported",
+	[1] = "Attempt to authenticate a chunk which is already marked as authentic",
+	[2] = "Chunk authentication error. The hash of chunk did not match expected value"
+};
+
+/*
+ * To copy scan hashes and authenticate test chunks, the initiating cpu must point
+ * to the EDX:EAX to the test image in linear address.
+ * Run wrmsr(MSR_COPY_SCAN_HASHES) for scan hash copy and run wrmsr(MSR_AUTHENTICATE_AND_COPY_CHUNK)
+ * for scan hash copy and test chunk authentication.
+ */
+static void copy_hashes_authenticate_chunks(struct work_struct *work)
+{
+	struct ifs_work *local_work = container_of(work, struct ifs_work, w);
+	union ifs_scan_hashes_status hashes_status;
+	union ifs_chunks_auth_status chunk_status;
+	struct device *dev = local_work->dev;
+	int i, num_chunks, chunk_size;
+	struct ifs_data *ifsd;
+	u64 linear_addr, base;
+	u32 err_code;
+
+	ifsd = ifs_get_data(dev);
+	/* run scan hash copy */
+	wrmsrl(MSR_COPY_SCAN_HASHES, ifs_hash_ptr);
+	rdmsrl(MSR_SCAN_HASHES_STATUS, hashes_status.data);
+
+	/* enumerate the scan image information */
+	num_chunks = hashes_status.num_chunks;
+	chunk_size = hashes_status.chunk_size * 1024;
+	err_code = hashes_status.error_code;
+
+	if (!hashes_status.valid) {
+		ifsd->loading_error = true;
+		if (err_code >= ARRAY_SIZE(scan_hash_status)) {
+			dev_err(dev, "invalid error code 0x%x for hash copy\n", err_code);
+			goto done;
+		}
+		dev_err(dev, "Hash copy error : %s", scan_hash_status[err_code]);
+		goto done;
+	}
+
+	/* base linear address to the scan data */
+	base = ifs_test_image_ptr;
+
+	/* scan data authentication and copy chunks to secured memory */
+	for (i = 0; i < num_chunks; i++) {
+		linear_addr = base + i * chunk_size;
+		linear_addr |= i;
+
+		wrmsrl(MSR_AUTHENTICATE_AND_COPY_CHUNK, linear_addr);
+		rdmsrl(MSR_CHUNKS_AUTHENTICATION_STATUS, chunk_status.data);
+
+		ifsd->valid_chunks = chunk_status.valid_chunks;
+		err_code = chunk_status.error_code;
+
+		if (err_code) {
+			ifsd->loading_error = true;
+			if (err_code >= ARRAY_SIZE(scan_authentication_status)) {
+				dev_err(dev,
+					"invalid error code 0x%x for authentication\n", err_code);
+				goto done;
+			}
+			dev_err(dev, "Chunk authentication error %s\n",
+				scan_authentication_status[err_code]);
+			goto done;
+		}
+	}
+done:
+	complete(&ifs_done);
+}
+
+/*
+ * IFS requires scan chunks authenticated per each socket in the platform.
+ * Once the test chunk is authenticated, it is automatically copied to secured memory
+ * and proceed the authentication for the next chunk.
+ */
+static int scan_chunks_sanity_check(struct device *dev)
+{
+	int metadata_size, curr_pkg, cpu, ret = -ENOMEM;
+	struct ifs_data *ifsd = ifs_get_data(dev);
+	bool *package_authenticated;
+	struct ifs_work local_work;
+	char *test_ptr;
+
+	package_authenticated = kcalloc(topology_max_packages(), sizeof(bool), GFP_KERNEL);
+	if (!package_authenticated)
+		return ret;
+
+	metadata_size = ifs_header_ptr->metadata_size;
+
+	/* Spec says that if the Meta Data Size = 0 then it should be treated as 2000 */
+	if (metadata_size == 0)
+		metadata_size = 2000;
+
+	/* Scan chunk start must be 256 byte aligned */
+	if ((metadata_size + IFS_HEADER_SIZE) % 256) {
+		dev_err(dev, "Scan pattern offset within the binary is not 256 byte aligned\n");
+		return -EINVAL;
+	}
+
+	test_ptr = (char *)ifs_header_ptr + IFS_HEADER_SIZE + metadata_size;
+	ifsd->loading_error = false;
+
+	ifs_test_image_ptr = (u64)test_ptr;
+	ifsd->loaded_version = ifs_header_ptr->blob_revision;
+
+	/* copy the scan hash and authenticate per package */
+	cpus_read_lock();
+	for_each_online_cpu(cpu) {
+		curr_pkg = topology_physical_package_id(cpu);
+		if (package_authenticated[curr_pkg])
+			continue;
+		reinit_completion(&ifs_done);
+		local_work.dev = dev;
+		INIT_WORK(&local_work.w, copy_hashes_authenticate_chunks);
+		schedule_work_on(cpu, &local_work.w);
+		wait_for_completion(&ifs_done);
+		if (ifsd->loading_error)
+			goto out;
+		package_authenticated[curr_pkg] = 1;
+	}
+	ret = 0;
+out:
+	cpus_read_unlock();
+	kfree(package_authenticated);
+
+	return ret;
+}
+
+static int ifs_sanity_check(struct device *dev,
+			    const struct microcode_header_intel *mc_header)
+{
+	unsigned long total_size, data_size;
+	u32 sum, *mc;
+
+	total_size = get_totalsize(mc_header);
+	data_size = get_datasize(mc_header);
+
+	if ((data_size + MC_HEADER_SIZE > total_size) || (total_size % sizeof(u32))) {
+		dev_err(dev, "bad ifs data file size.\n");
+		return -EINVAL;
+	}
+
+	if (mc_header->ldrver != 1 || mc_header->hdrver != 1) {
+		dev_err(dev, "invalid/unknown ifs update format.\n");
+		return -EINVAL;
+	}
+
+	mc = (u32 *)mc_header;
+	sum = 0;
+	for (int i = 0; i < total_size / sizeof(u32); i++)
+		sum += mc[i];
+
+	if (sum) {
+		dev_err(dev, "bad ifs data checksum, aborting.\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static bool find_ifs_matching_signature(struct device *dev, struct ucode_cpu_info *uci,
+					const struct microcode_header_intel *shdr)
+{
+	unsigned int mc_size;
+
+	mc_size = get_totalsize(shdr);
+
+	if (!mc_size || ifs_sanity_check(dev, shdr) < 0) {
+		dev_err(dev, "ifs sanity check failure\n");
+		return false;
+	}
+
+	if (!intel_cpu_signatures_match(uci->cpu_sig.sig, uci->cpu_sig.pf, shdr->sig, shdr->pf)) {
+		dev_err(dev, "ifs signature, pf not matching\n");
+		return false;
+	}
+
+	return true;
+}
+
+static bool ifs_image_sanity_check(struct device *dev, const struct microcode_header_intel *data)
+{
+	struct ucode_cpu_info uci;
+
+	intel_cpu_collect_info(&uci);
+
+	return find_ifs_matching_signature(dev, &uci, data);
+}
+
+/*
+ * Load ifs image. Before loading ifs module, the ifs image must be located
+ * in /lib/firmware/intel/ifs and named as {family/model/stepping}.{testname}.
+ */
+void ifs_load_firmware(struct device *dev)
+{
+	struct ifs_data *ifsd = ifs_get_data(dev);
+	const struct firmware *fw;
+	char scan_path[32];
+	int ret;
+
+	snprintf(scan_path, sizeof(scan_path), "intel/ifs/%02x-%02x-%02x.scan",
+		 boot_cpu_data.x86, boot_cpu_data.x86_model, boot_cpu_data.x86_stepping);
+
+	ret = request_firmware_direct(&fw, scan_path, dev);
+	if (ret) {
+		dev_err(dev, "ifs file %s load failed\n", scan_path);
+		goto done;
+	}
+
+	if (!ifs_image_sanity_check(dev, (struct microcode_header_intel *)fw->data)) {
+		dev_err(dev, "ifs header sanity check failed\n");
+		goto release;
+	}
+
+	ifs_header_ptr = (struct ifs_header *)fw->data;
+	ifs_hash_ptr = (u64)(ifs_header_ptr + 1);
+
+	ret = scan_chunks_sanity_check(dev);
+release:
+	release_firmware(fw);
+done:
+	ifsd->loaded = (ret == 0);
+}

drivers/platform/x86/intel/ifs/runtest.c

+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2022 Intel Corporation. */
+
+#include <linux/cpu.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/nmi.h>
+#include <linux/slab.h>
+#include <linux/stop_machine.h>
+
+#include "ifs.h"
+
+/*
+ * Note all code and data in this file is protected by
+ * ifs_sem. On HT systems all threads on a core will
+ * execute together, but only the first thread on the
+ * core will update results of the test.
+ */
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/intel_ifs.h>
+
+/* Max retries on the same chunk */
+#define MAX_IFS_RETRIES  5
+
+/*
+ * Number of TSC cycles that a logical CPU will wait for the other
+ * logical CPU on the core in the WRMSR(ACTIVATE_SCAN).
+ */
+#define IFS_THREAD_WAIT 100000
+
+enum ifs_status_err_code {
+	IFS_NO_ERROR				= 0,
+	IFS_OTHER_THREAD_COULD_NOT_JOIN		= 1,
+	IFS_INTERRUPTED_BEFORE_RENDEZVOUS	= 2,
+	IFS_POWER_MGMT_INADEQUATE_FOR_SCAN	= 3,
+	IFS_INVALID_CHUNK_RANGE			= 4,
+	IFS_MISMATCH_ARGUMENTS_BETWEEN_THREADS	= 5,
+	IFS_CORE_NOT_CAPABLE_CURRENTLY		= 6,
+	IFS_UNASSIGNED_ERROR_CODE		= 7,
+	IFS_EXCEED_NUMBER_OF_THREADS_CONCURRENT	= 8,
+	IFS_INTERRUPTED_DURING_EXECUTION	= 9,
+};
+
+static const char * const scan_test_status[] = {
+	[IFS_NO_ERROR] = "SCAN no error",
+	[IFS_OTHER_THREAD_COULD_NOT_JOIN] = "Other thread could not join.",
+	[IFS_INTERRUPTED_BEFORE_RENDEZVOUS] = "Interrupt occurred prior to SCAN coordination.",
+	[IFS_POWER_MGMT_INADEQUATE_FOR_SCAN] =
+	"Core Abort SCAN Response due to power management condition.",
+	[IFS_INVALID_CHUNK_RANGE] = "Non valid chunks in the range",
+	[IFS_MISMATCH_ARGUMENTS_BETWEEN_THREADS] = "Mismatch in arguments between threads T0/T1.",
+	[IFS_CORE_NOT_CAPABLE_CURRENTLY] = "Core not capable of performing SCAN currently",
+	[IFS_UNASSIGNED_ERROR_CODE] = "Unassigned error code 0x7",
+	[IFS_EXCEED_NUMBER_OF_THREADS_CONCURRENT] =
+	"Exceeded number of Logical Processors (LP) allowed to run Scan-At-Field concurrently",
+	[IFS_INTERRUPTED_DURING_EXECUTION] = "Interrupt occurred prior to SCAN start",
+};
+
+static void message_not_tested(struct device *dev, int cpu, union ifs_status status)
+{
+	if (status.error_code < ARRAY_SIZE(scan_test_status)) {
+		dev_info(dev, "CPU(s) %*pbl: SCAN operation did not start. %s\n",
+			 cpumask_pr_args(cpu_smt_mask(cpu)),
+			 scan_test_status[status.error_code]);
+	} else if (status.error_code == IFS_SW_TIMEOUT) {
+		dev_info(dev, "CPU(s) %*pbl: software timeout during scan\n",
+			 cpumask_pr_args(cpu_smt_mask(cpu)));
+	} else if (status.error_code == IFS_SW_PARTIAL_COMPLETION) {
+		dev_info(dev, "CPU(s) %*pbl: %s\n",
+			 cpumask_pr_args(cpu_smt_mask(cpu)),
+			 "Not all scan chunks were executed. Maximum forward progress retries exceeded");
+	} else {
+		dev_info(dev, "CPU(s) %*pbl: SCAN unknown status %llx\n",
+			 cpumask_pr_args(cpu_smt_mask(cpu)), status.data);
+	}
+}
+
+static void message_fail(struct device *dev, int cpu, union ifs_status status)
+{
+	/*
+	 * control_error is set when the microcode runs into a problem
+	 * loading the image from the reserved BIOS memory, or it has
+	 * been corrupted. Reloading the image may fix this issue.
+	 */
+	if (status.control_error) {
+		dev_err(dev, "CPU(s) %*pbl: could not execute from loaded scan image\n",
+			cpumask_pr_args(cpu_smt_mask(cpu)));
+	}
+
+	/*
+	 * signature_error is set when the output from the scan chains does not
+	 * match the expected signature. This might be a transient problem (e.g.
+	 * due to a bit flip from an alpha particle or neutron). If the problem
+	 * repeats on a subsequent test, then it indicates an actual problem in
+	 * the core being tested.
+	 */
+	if (status.signature_error) {
+		dev_err(dev, "CPU(s) %*pbl: test signature incorrect.\n",
+			cpumask_pr_args(cpu_smt_mask(cpu)));
+	}
+}
+
+static bool can_restart(union ifs_status status)
+{
+	enum ifs_status_err_code err_code = status.error_code;
+
+	/* Signature for chunk is bad, or scan test failed */
+	if (status.signature_error || status.control_error)
+		return false;
+
+	switch (err_code) {
+	case IFS_NO_ERROR:
+	case IFS_OTHER_THREAD_COULD_NOT_JOIN:
+	case IFS_INTERRUPTED_BEFORE_RENDEZVOUS:
+	case IFS_POWER_MGMT_INADEQUATE_FOR_SCAN:
+	case IFS_EXCEED_NUMBER_OF_THREADS_CONCURRENT:
+	case IFS_INTERRUPTED_DURING_EXECUTION:
+		return true;
+	case IFS_INVALID_CHUNK_RANGE:
+	case IFS_MISMATCH_ARGUMENTS_BETWEEN_THREADS:
+	case IFS_CORE_NOT_CAPABLE_CURRENTLY:
+	case IFS_UNASSIGNED_ERROR_CODE:
+		break;
+	}
+	return false;
+}
+
+/*
+ * Execute the scan. Called "simultaneously" on all threads of a core
+ * at high priority using the stop_cpus mechanism.
+ */
+static int doscan(void *data)
+{
+	int cpu = smp_processor_id();
+	u64 *msrs = data;
+	int first;
+
+	/* Only the first logical CPU on a core reports result */
+	first = cpumask_first(cpu_smt_mask(cpu));
+
+	/*
+	 * This WRMSR will wait for other HT threads to also write
+	 * to this MSR (at most for activate.delay cycles). Then it
+	 * starts scan of each requested chunk. The core scan happens
+	 * during the "execution" of the WRMSR. This instruction can
+	 * take up to 200 milliseconds (in the case where all chunks
+	 * are processed in a single pass) before it retires.
+	 */
+	wrmsrl(MSR_ACTIVATE_SCAN, msrs[0]);
+
+	if (cpu == first) {
+		/* Pass back the result of the scan */
+		rdmsrl(MSR_SCAN_STATUS, msrs[1]);
+	}
+
+	return 0;
+}
+
+/*
+ * Use stop_core_cpuslocked() to synchronize writing to MSR_ACTIVATE_SCAN
+ * on all threads of the core to be tested. Loop if necessary to complete
+ * run of all chunks. Include some defensive tests to make sure forward
+ * progress is made, and that the whole test completes in a reasonable time.
+ */
+static void ifs_test_core(int cpu, struct device *dev)
+{
+	union ifs_scan activate;
+	union ifs_status status;
+	unsigned long timeout;
+	struct ifs_data *ifsd;
+	u64 msrvals[2];
+	int retries;
+
+	ifsd = ifs_get_data(dev);
+
+	activate.rsvd = 0;
+	activate.delay = IFS_THREAD_WAIT;
+	activate.sigmce = 0;
+	activate.start = 0;
+	activate.stop = ifsd->valid_chunks - 1;
+
+	timeout = jiffies + HZ / 2;
+	retries = MAX_IFS_RETRIES;
+
+	while (activate.start <= activate.stop) {
+		if (time_after(jiffies, timeout)) {
+			status.error_code = IFS_SW_TIMEOUT;
+			break;
+		}
+
+		msrvals[0] = activate.data;
+		stop_core_cpuslocked(cpu, doscan, msrvals);
+
+		status.data = msrvals[1];
+
+		trace_ifs_status(cpu, activate, status);
+
+		/* Some cases can be retried, give up for others */
+		if (!can_restart(status))
+			break;
+
+		if (status.chunk_num == activate.start) {
+			/* Check for forward progress */
+			if (--retries == 0) {
+				if (status.error_code == IFS_NO_ERROR)
+					status.error_code = IFS_SW_PARTIAL_COMPLETION;
+				break;
+			}
+		} else {
+			retries = MAX_IFS_RETRIES;
+			activate.start = status.chunk_num;
+		}
+	}
+
+	/* Update status for this core */
+	ifsd->scan_details = status.data;
+
+	if (status.control_error || status.signature_error) {
+		ifsd->status = SCAN_TEST_FAIL;
+		message_fail(dev, cpu, status);
+	} else if (status.error_code) {
+		ifsd->status = SCAN_NOT_TESTED;
+		message_not_tested(dev, cpu, status);
+	} else {
+		ifsd->status = SCAN_TEST_PASS;
+	}
+}
+
+/*
+ * Initiate per core test. It wakes up work queue threads on the target cpu and
+ * its sibling cpu. Once all sibling threads wake up, the scan test gets executed and
+ * wait for all sibling threads to finish the scan test.
+ */
+int do_core_test(int cpu, struct device *dev)
+{
+	int ret = 0;
+
+	/* Prevent CPUs from being taken offline during the scan test */
+	cpus_read_lock();
+
+	if (!cpu_online(cpu)) {
+		dev_info(dev, "cannot test on the offline cpu %d\n", cpu);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	ifs_test_core(cpu, dev);
+out:
+	cpus_read_unlock();
+	return ret;
+}

drivers/platform/x86/intel/ifs/sysfs.c

+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright(c) 2022 Intel Corporation. */
+
+#include <linux/cpu.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/semaphore.h>
+#include <linux/slab.h>
+
+#include "ifs.h"
+
+/*
+ * Protects against simultaneous tests on multiple cores, or
+ * reloading can file while a test is in progress
+ */
+DEFINE_SEMAPHORE(ifs_sem);
+
+/*
+ * The sysfs interface to check additional details of last test
+ * cat /sys/devices/system/platform/ifs/details
+ */
+static ssize_t details_show(struct device *dev,
+			    struct device_attribute *attr,
+			    char *buf)
+{
+	struct ifs_data *ifsd = ifs_get_data(dev);
+
+	return sysfs_emit(buf, "%#llx\n", ifsd->scan_details);
+}
+
+static DEVICE_ATTR_RO(details);
+
+static const char * const status_msg[] = {
+	[SCAN_NOT_TESTED] = "untested",
+	[SCAN_TEST_PASS] = "pass",
+	[SCAN_TEST_FAIL] = "fail"
+};
+
+/*
+ * The sysfs interface to check the test status:
+ * To check the status of last test
+ * cat /sys/devices/platform/ifs/status
+ */
+static ssize_t status_show(struct device *dev,
+			   struct device_attribute *attr,
+			   char *buf)
+{
+	struct ifs_data *ifsd = ifs_get_data(dev);
+
+	return sysfs_emit(buf, "%s\n", status_msg[ifsd->status]);
+}
+
+static DEVICE_ATTR_RO(status);
+
+/*
+ * The sysfs interface for single core testing
+ * To start test, for example, cpu5
+ * echo 5 > /sys/devices/platform/ifs/run_test
+ * To check the result:
+ * cat /sys/devices/platform/ifs/result
+ * The sibling core gets tested at the same time.
+ */
+static ssize_t run_test_store(struct device *dev,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct ifs_data *ifsd = ifs_get_data(dev);
+	unsigned int cpu;
+	int rc;
+
+	rc = kstrtouint(buf, 0, &cpu);
+	if (rc < 0 || cpu >= nr_cpu_ids)
+		return -EINVAL;
+
+	if (down_interruptible(&ifs_sem))
+		return -EINTR;
+
+	if (!ifsd->loaded)
+		rc = -EPERM;
+	else
+		rc = do_core_test(cpu, dev);
+
+	up(&ifs_sem);
+
+	return rc ? rc : count;
+}
+
+static DEVICE_ATTR_WO(run_test);
+
+/*
+ * Reload the IFS image. When user wants to install new IFS image
+ */
+static ssize_t reload_store(struct device *dev,
+			    struct device_attribute *attr,
+			    const char *buf, size_t count)
+{
+	struct ifs_data *ifsd = ifs_get_data(dev);
+	bool res;
+
+
+	if (kstrtobool(buf, &res))
+		return -EINVAL;
+	if (!res)
+		return count;
+
+	if (down_interruptible(&ifs_sem))
+		return -EINTR;
+
+	ifs_load_firmware(dev);
+
+	up(&ifs_sem);
+
+	return ifsd->loaded ? count : -ENODEV;
+}
+
+static DEVICE_ATTR_WO(reload);
+
+/*
+ * Display currently loaded IFS image version.
+ */
+static ssize_t image_version_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct ifs_data *ifsd = ifs_get_data(dev);
+
+	if (!ifsd->loaded)
+		return sysfs_emit(buf, "%s\n", "none");
+	else
+		return sysfs_emit(buf, "%#x\n", ifsd->loaded_version);
+}
+
+static DEVICE_ATTR_RO(image_version);
+
+/* global scan sysfs attributes */
+static struct attribute *plat_ifs_attrs[] = {
+	&dev_attr_details.attr,
+	&dev_attr_status.attr,
+	&dev_attr_run_test.attr,
+	&dev_attr_reload.attr,
+	&dev_attr_image_version.attr,
+	NULL
+};
+
+ATTRIBUTE_GROUPS(plat_ifs);
+
+const struct attribute_group **ifs_get_groups(void)
+{
+	return plat_ifs_groups;
+}

drivers/platform/x86/intel/pmc/core.c

@@ -999,7 +999,7 @@ static umode_t etr3_is_visible(struct kobject *kobj,
 				struct attribute *attr,
 				int idx)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct pmc_dev *pmcdev = dev_get_drvdata(dev);
 	const struct pmc_reg_map *map = pmcdev->map;
 	u32 reg;

drivers/platform/x86/pmc_atom.c

@@ -221,19 +221,6 @@ int pmc_atom_read(int offset, u32 *value)
 	*value = pmc_reg_read(pmc, offset);
 	return 0;
 }
-EXPORT_SYMBOL_GPL(pmc_atom_read);
-
-int pmc_atom_write(int offset, u32 value)
-{
-	struct pmc_dev *pmc = &pmc_device;
-
-	if (!pmc->init)
-		return -ENODEV;
-
-	pmc_reg_write(pmc, offset, value);
-	return 0;
-}
-EXPORT_SYMBOL_GPL(pmc_atom_write);
 
 static void pmc_power_off(void)
 {

drivers/platform/x86/samsung-laptop.c

@@ -1208,7 +1208,7 @@ static int __init samsung_backlight_init(struct samsung_laptop *samsung)
 static umode_t samsung_sysfs_is_visible(struct kobject *kobj,
 					struct attribute *attr, int idx)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct samsung_laptop *samsung = dev_get_drvdata(dev);
 	bool ok = true;
 

drivers/platform/x86/toshiba_acpi.c

@@ -2353,7 +2353,7 @@ static struct attribute *toshiba_attributes[] = {
 static umode_t toshiba_sysfs_is_visible(struct kobject *kobj,
 					struct attribute *attr, int idx)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct toshiba_acpi_dev *drv = dev_get_drvdata(dev);
 	bool exists = true;
 

drivers/platform/x86/winmate-fm07-keys.c

+// SPDX-License-Identifier: GPL-2.0
+//
+// Driver for the Winmate FM07 front-panel keys
+//
+// Author: Daniel Beer <daniel.beer@tirotech.co.nz>
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/dmi.h>
+#include <linux/io.h>
+
+#define DRV_NAME	"winmate-fm07keys"
+
+#define PORT_CMD	0x6c
+#define PORT_DATA	0x68
+
+#define EC_ADDR_KEYS	0x3b
+#define EC_CMD_READ	0x80
+
+#define BASE_KEY	KEY_F13
+#define NUM_KEYS	5
+
+/* Typically we're done in fewer than 10 iterations */
+#define LOOP_TIMEOUT	1000
+
+static void fm07keys_poll(struct input_dev *input)
+{
+	uint8_t k;
+	int i;
+
+	/* Flush output buffer */
+	i = 0;
+	while (inb(PORT_CMD) & 0x01) {
+		if (++i >= LOOP_TIMEOUT)
+			goto timeout;
+		inb(PORT_DATA);
+	}
+
+	/* Send request and wait for write completion */
+	outb(EC_CMD_READ, PORT_CMD);
+	i = 0;
+	while (inb(PORT_CMD) & 0x02)
+		if (++i >= LOOP_TIMEOUT)
+			goto timeout;
+
+	outb(EC_ADDR_KEYS, PORT_DATA);
+	i = 0;
+	while (inb(PORT_CMD) & 0x02)
+		if (++i >= LOOP_TIMEOUT)
+			goto timeout;
+
+	/* Wait for data ready */
+	i = 0;
+	while (!(inb(PORT_CMD) & 0x01))
+		if (++i >= LOOP_TIMEOUT)
+			goto timeout;
+	k = inb(PORT_DATA);
+
+	/* Notify of new key states */
+	for (i = 0; i < NUM_KEYS; i++) {
+		input_report_key(input, BASE_KEY + i, (~k) & 1);
+		k >>= 1;
+	}
+
+	input_sync(input);
+	return;
+
+timeout:
+	dev_warn_ratelimited(&input->dev, "timeout polling IO memory\n");
+}
+
+static int fm07keys_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct input_dev *input;
+	int ret;
+	int i;
+
+	input = devm_input_allocate_device(dev);
+	if (!input) {
+		dev_err(dev, "no memory for input device\n");
+		return -ENOMEM;
+	}
+
+	if (!devm_request_region(dev, PORT_CMD, 1, "Winmate FM07 EC"))
+		return -EBUSY;
+	if (!devm_request_region(dev, PORT_DATA, 1, "Winmate FM07 EC"))
+		return -EBUSY;
+
+	input->name = "Winmate FM07 front-panel keys";
+	input->phys = DRV_NAME "/input0";
+
+	input->id.bustype = BUS_HOST;
+	input->id.vendor = 0x0001;
+	input->id.product = 0x0001;
+	input->id.version = 0x0100;
+
+	__set_bit(EV_KEY, input->evbit);
+
+	for (i = 0; i < NUM_KEYS; i++)
+		__set_bit(BASE_KEY + i, input->keybit);
+
+	ret = input_setup_polling(input, fm07keys_poll);
+	if (ret) {
+		dev_err(dev, "unable to set up polling, err=%d\n", ret);
+		return ret;
+	}
+
+	/* These are silicone buttons. They can't be pressed in rapid
+	 * succession too quickly, and 50 Hz seems to be an adequate
+	 * sampling rate without missing any events when tested.
+	 */
+	input_set_poll_interval(input, 20);
+
+	ret = input_register_device(input);
+	if (ret) {
+		dev_err(dev, "unable to register polled device, err=%d\n",
+			ret);
+		return ret;
+	}
+
+	input_sync(input);
+	return 0;
+}
+
+static struct platform_driver fm07keys_driver = {
+	.probe		= fm07keys_probe,
+	.driver		= {
+		.name	= DRV_NAME
+	},
+};
+
+static struct platform_device *dev;
+
+static const struct dmi_system_id fm07keys_dmi_table[] __initconst = {
+	{
+		/* FM07 and FM07P */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Winmate Inc."),
+			DMI_MATCH(DMI_PRODUCT_NAME, "IP30"),
+		},
+	},
+	{ }
+};
+
+MODULE_DEVICE_TABLE(dmi, fm07keys_dmi_table);
+
+static int __init fm07keys_init(void)
+{
+	int ret;
+
+	if (!dmi_check_system(fm07keys_dmi_table))
+		return -ENODEV;
+
+	ret = platform_driver_register(&fm07keys_driver);
+	if (ret) {
+		pr_err("fm07keys: failed to register driver, err=%d\n", ret);
+		return ret;
+	}
+
+	dev = platform_device_register_simple(DRV_NAME, -1, NULL, 0);
+	if (IS_ERR(dev)) {
+		ret = PTR_ERR(dev);
+		pr_err("fm07keys: failed to allocate device, err = %d\n", ret);
+		goto fail_register;
+	}
+
+	return 0;
+
+fail_register:
+	platform_driver_unregister(&fm07keys_driver);
+	return ret;
+}
+
+static void __exit fm07keys_exit(void)
+{
+	platform_driver_unregister(&fm07keys_driver);
+	platform_device_unregister(dev);
+}
+
+module_init(fm07keys_init);
+module_exit(fm07keys_exit);
+
+MODULE_AUTHOR("Daniel Beer <daniel.beer@tirotech.co.nz>");
+MODULE_DESCRIPTION("Winmate FM07 front-panel keys driver");
+MODULE_LICENSE("GPL");

drivers/platform/x86/wmi.c

@@ -1308,21 +1308,20 @@ acpi_wmi_ec_space_handler(u32 function, acpi_physical_address address,
 static void acpi_wmi_notify_handler(acpi_handle handle, u32 event,
 				    void *context)
 {
-	struct wmi_block *wblock;
-	bool found_it = false;
+	struct wmi_block *wblock = NULL, *iter;
 
-	list_for_each_entry(wblock, &wmi_block_list, list) {
-		struct guid_block *block = &wblock->gblock;
+	list_for_each_entry(iter, &wmi_block_list, list) {
+		struct guid_block *block = &iter->gblock;
 
-		if (wblock->acpi_device->handle == handle &&
+		if (iter->acpi_device->handle == handle &&
 		    (block->flags & ACPI_WMI_EVENT) &&
 		    (block->notify_id == event)) {
-			found_it = true;
+			wblock = iter;
 			break;
 		}
 	}
 
-	if (!found_it)
+	if (!wblock)
 		return;
 
 	/* If a driver is bound, then notify the driver. */

include/linux/platform_data/mlxreg.h

@@ -216,6 +216,8 @@ struct mlxreg_core_platform_data {
  * @mask_low: low aggregation interrupt common mask;
  * @deferred_nr: I2C adapter number must be exist prior probing execution;
  * @shift_nr: I2C adapter numbers must be incremented by this value;
+ * @handle: handle to be passed by callback;
+ * @completion_notify: callback to notify when platform driver probing is done;
  */
 struct mlxreg_core_hotplug_platform_data {
 	struct mlxreg_core_item *items;
@@ -228,6 +230,8 @@ struct mlxreg_core_hotplug_platform_data {
 	u32 mask_low;
 	int deferred_nr;
 	int shift_nr;
+	void *handle;
+	int (*completion_notify)(void *handle, int id);
 };
 
 #endif /* __LINUX_PLATFORM_DATA_MLXREG_H */

include/linux/platform_data/x86/pmc_atom.h

@@ -144,6 +144,5 @@
 #define	SLEEP_ENABLE		0x2000
 
 extern int pmc_atom_read(int offset, u32 *value);
-extern int pmc_atom_write(int offset, u32 value);
 
 #endif /* PMC_ATOM_H */

include/linux/stop_machine.h

@@ -124,6 +124,22 @@ int stop_machine(cpu_stop_fn_t fn, void *data, const struct cpumask *cpus);
  */
 int stop_machine_cpuslocked(cpu_stop_fn_t fn, void *data, const struct cpumask *cpus);
 
+/**
+ * stop_core_cpuslocked: - stop all threads on just one core
+ * @cpu: any cpu in the targeted core
+ * @fn: the function to run
+ * @data: the data ptr for @fn()
+ *
+ * Same as above, but instead of every CPU, only the logical CPUs of a
+ * single core are affected.
+ *
+ * Context: Must be called from within a cpus_read_lock() protected region.
+ *
+ * Return: 0 if all executions of @fn returned 0, any non zero return
+ * value if any returned non zero.
+ */
+int stop_core_cpuslocked(unsigned int cpu, cpu_stop_fn_t fn, void *data);
+
 int stop_machine_from_inactive_cpu(cpu_stop_fn_t fn, void *data,
 				   const struct cpumask *cpus);
 #else	/* CONFIG_SMP || CONFIG_HOTPLUG_CPU */

include/trace/events/intel_ifs.h

+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM intel_ifs
+
+#if !defined(_TRACE_IFS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_IFS_H
+
+#include <linux/ktime.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(ifs_status,
+
+	TP_PROTO(int cpu, union ifs_scan activate, union ifs_status status),
+
+	TP_ARGS(cpu, activate, status),
+
+	TP_STRUCT__entry(
+		__field(	u64,	status	)
+		__field(	int,	cpu	)
+		__field(	u8,	start	)
+		__field(	u8,	stop	)
+	),
+
+	TP_fast_assign(
+		__entry->cpu	= cpu;
+		__entry->start	= activate.start;
+		__entry->stop	= activate.stop;
+		__entry->status	= status.data;
+	),
+
+	TP_printk("cpu: %d, start: %.2x, stop: %.2x, status: %llx",
+		__entry->cpu,
+		__entry->start,
+		__entry->stop,
+		__entry->status)
+);
+
+#endif /* _TRACE_IFS_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>

kernel/stop_machine.c

@@ -633,6 +633,27 @@ int stop_machine(cpu_stop_fn_t fn, void *data, const struct cpumask *cpus)
 }
 EXPORT_SYMBOL_GPL(stop_machine);
 
+#ifdef CONFIG_SCHED_SMT
+int stop_core_cpuslocked(unsigned int cpu, cpu_stop_fn_t fn, void *data)
+{
+	const struct cpumask *smt_mask = cpu_smt_mask(cpu);
+
+	struct multi_stop_data msdata = {
+		.fn = fn,
+		.data = data,
+		.num_threads = cpumask_weight(smt_mask),
+		.active_cpus = smt_mask,
+	};
+
+	lockdep_assert_cpus_held();
+
+	/* Set the initial state and stop all online cpus. */
+	set_state(&msdata, MULTI_STOP_PREPARE);
+	return stop_cpus(smt_mask, multi_cpu_stop, &msdata);
+}
+EXPORT_SYMBOL_GPL(stop_core_cpuslocked);
+#endif
+
 /**
  * stop_machine_from_inactive_cpu - stop_machine() from inactive CPU
  * @fn: the function to run

tools/power/x86/intel-speed-select/hfi-events.c

@@ -190,7 +190,7 @@ static int handle_event(struct nl_msg *n, void *arg)
 	struct genlmsghdr *genlhdr = genlmsg_hdr(nlh);
 	struct nlattr *attrs[THERMAL_GENL_ATTR_MAX + 1];
 	int ret;
-	struct perf_cap perf_cap;
+	struct perf_cap perf_cap = {0};
 
 	ret = genlmsg_parse(nlh, 0, attrs, THERMAL_GENL_ATTR_MAX, NULL);
 

tools/power/x86/intel-speed-select/isst-config.c

@@ -1892,6 +1892,12 @@ static void set_fact_for_cpu(int cpu, void *arg1, void *arg2, void *arg3,
 	int ret;
 	int status = *(int *)arg4;
 
+	if (status && no_turbo()) {
+		isst_display_error_info_message(1, "Turbo mode is disabled", 0, 0);
+		ret = -1;
+		goto disp_results;
+	}
+
 	ret = isst_get_ctdp_levels(cpu, &pkg_dev);
 	if (ret) {
 		isst_display_error_info_message(1, "Failed to get number of levels", 0, 0);