firmware: qcom: scm: Move the scm driver to drivers/firmware

Architectural changes in the ARM Linux kernel tree mandate the eventual
removal of the mach-* directories. Move the scm driver to
drivers/firmware and the scm header to include/linux to support that
removal.
Signed-off-by: Kumar Gala <galak@codeaurora.org>

MAINTAINERS

@@ -1317,6 +1317,7 @@ L:	linux-soc@vger.kernel.org
 S:	Maintained
 F:	arch/arm/mach-qcom/
 F:	drivers/soc/qcom/
+F:	drivers/firmware/qcom_scm.c
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/galak/linux-qcom.git
 
 ARM/RADISYS ENP2611 MACHINE SUPPORT

arch/arm/Kconfig

@@ -2160,6 +2160,8 @@ source "net/Kconfig"
 
 source "drivers/Kconfig"
 
+source "drivers/firmware/Kconfig"
+
 source "fs/Kconfig"
 
 source "arch/arm/Kconfig.debug"

arch/arm/mach-qcom/Kconfig

@@ -22,7 +22,4 @@ config ARCH_MSM8974
 	bool "Enable support for MSM8974"
 	select HAVE_ARM_ARCH_TIMER
 
-config QCOM_SCM
-	bool
-
 endif

arch/arm/mach-qcom/Makefile

 obj-y			:= board.o
 obj-$(CONFIG_SMP)	+= platsmp.o
-obj-$(CONFIG_QCOM_SCM)	+= scm.o
-
-CFLAGS_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1)

arch/arm/mach-qcom/platsmp.c

@@ -17,10 +17,10 @@
 #include <linux/of_address.h>
 #include <linux/smp.h>
 #include <linux/io.h>
+#include <linux/qcom_scm.h>
 
 #include <asm/smp_plat.h>
 
-#include "scm.h"
 
 #define VDD_SC1_ARRAY_CLAMP_GFS_CTL	0x35a0
 #define SCSS_CPU1CORE_RESET		0x2d80

drivers/firmware/Kconfig

@@ -132,6 +132,10 @@ config ISCSI_IBFT
 	  detect iSCSI boot parameters dynamically during system boot, say Y.
 	  Otherwise, say N.
 
+config QCOM_SCM
+	bool
+	depends on ARM || ARM64
+
 source "drivers/firmware/google/Kconfig"
 source "drivers/firmware/efi/Kconfig"
 

drivers/firmware/Makefile

@@ -11,6 +11,8 @@ obj-$(CONFIG_DMIID)		+= dmi-id.o
 obj-$(CONFIG_ISCSI_IBFT_FIND)	+= iscsi_ibft_find.o
 obj-$(CONFIG_ISCSI_IBFT)	+= iscsi_ibft.o
 obj-$(CONFIG_FIRMWARE_MEMMAP)	+= memmap.o
+obj-$(CONFIG_QCOM_SCM)		+= qcom_scm.o
+CFLAGS_qcom_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1)
 
 obj-$(CONFIG_GOOGLE_FIRMWARE)	+= google/
 obj-$(CONFIG_EFI)		+= efi/

arch/arm/mach-qcom/scm.c → drivers/firmware/qcom_scm.c

@@ -21,11 +21,11 @@
 #include <linux/mutex.h>
 #include <linux/errno.h>
 #include <linux/err.h>
+#include <linux/qcom_scm.h>
 
 #include <asm/outercache.h>
 #include <asm/cacheflush.h>
 
-#include "scm.h"
 
 #define QCOM_SCM_ENOMEM		-5
 #define QCOM_SCM_EOPNOTSUPP	-4