Merge tag 'arm-soc-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC updates from Arnd Bergmann:
 "The main changes this time are for the organization of the Kconfig
  files, introducing per-vendor top-level options on arm64 to match
  those on arm32, and making the platform selection on arm32 more
  uniform, in particular for the remaining StrongARM platforms that
  still have a couple of special cases compared to the more recent ones.

  I also did a cleanup of the old Footbridge platform, which was the
  last holdout for the phys_to_dma()/dma_to_phys() interface that is now
  completely gone from arm32, completing work started by Christoph
  Hellwig"

* tag 'arm-soc-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (21 commits)
  ARM: aspeed: Kconfig: Fix indentation
  ARM: Drop CMDLINE_* dependency on ATAGS
  ARM: Drop CMDLINE_FORCE dependency on !ARCH_MULTIPLATFORM
  ARM: s3c: remove orphan declarations from arch/arm/mach-s3c/devs.h
  pxa: Drop if with an always false condition
  ARM: orion: fix include path
  ARM: shmobile: Drop selecting SOC_BUS
  arm64: renesas: Drop selecting SOC_BUS
  ARM: disallow PCI with MMU=n again
  ARM: footbridge: remove custom DMA address handling
  MAINTAINERS: Add BCM4908 maintainer to BCMBCA entry
  ARM: footbridge: move isa-dma support into footbridge
  ARM: footbridge: remove leftover from personal-server
  ARM: footbridge: remove addin mode
  arm64: Kconfig.platforms: Group NXP platforms together
  arm64: Kconfig.platforms: Re-organized Broadcom menu
  ARM: make ARCH_MULTIPLATFORM user-visible
  ARM: fix XIP_KERNEL dependencies
  ARM: Kconfig: clean up platform selection
  ARM: simplify machdirs/platdirs handling
  ...

MAINTAINERS

@@ -3971,6 +3971,7 @@ M:	William Zhang <william.zhang@broadcom.com>
 M:	Anand Gore <anand.gore@broadcom.com>
 M:	Kursad Oney <kursad.oney@broadcom.com>
 M:	Florian Fainelli <f.fainelli@gmail.com>
+M:	Rafał Miłecki <rafal@milecki.pl>
 R:	Broadcom internal kernel review list <bcm-kernel-feedback-list@broadcom.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained

arch/arm/Kconfig

@@ -28,7 +28,6 @@ config ARM
 	select ARCH_HAS_GCOV_PROFILE_ALL
 	select ARCH_KEEP_MEMBLOCK
 	select ARCH_MIGHT_HAVE_PC_PARPORT
-	select ARCH_NO_SG_CHAIN if !ARM_HAS_SG_CHAIN
 	select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
 	select ARCH_OPTIONAL_KERNEL_RWX_DEFAULT if CPU_V7
 	select ARCH_SUPPORTS_ATOMIC_RMW
@@ -42,6 +41,7 @@ config ARM
 	select ARCH_WANT_LD_ORPHAN_WARN
 	select BINFMT_FLAT_ARGVP_ENVP_ON_STACK
 	select BUILDTIME_TABLE_SORT if MMU
+	select COMMON_CLK if !(ARCH_RPC || ARCH_FOOTBRIDGE)
 	select CLONE_BACKWARDS
 	select CPU_PM if SUSPEND || CPU_IDLE
 	select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS
@@ -110,6 +110,7 @@ config ARM
 	select HAVE_MOD_ARCH_SPECIFIC
 	select HAVE_NMI
 	select HAVE_OPTPROBES if !THUMB2_KERNEL
+	select HAVE_PCI if MMU
 	select HAVE_PERF_EVENTS
 	select HAVE_PERF_REGS
 	select HAVE_PERF_USER_STACK_DUMP
@@ -126,13 +127,17 @@ config ARM
 	select OF_EARLY_FLATTREE if OF
 	select OLD_SIGACTION
 	select OLD_SIGSUSPEND3
+	select PCI_DOMAINS_GENERIC if PCI
 	select PCI_SYSCALL if PCI
 	select PERF_USE_VMALLOC
 	select RTC_LIB
+	select SPARSE_IRQ if !(ARCH_FOOTBRIDGE || ARCH_RPC)
 	select SYS_SUPPORTS_APM_EMULATION
 	select THREAD_INFO_IN_TASK
+	select TIMER_OF if OF
 	select HAVE_ARCH_VMAP_STACK if MMU && ARM_HAS_GROUP_RELOCS
 	select TRACE_IRQFLAGS_SUPPORT if !CPU_V7M
+	select USE_OF if !(ARCH_FOOTBRIDGE || ARCH_RPC || ARCH_SA1100)
 	# Above selects are sorted alphabetically; please add new ones
 	# according to that.  Thanks.
 	help
@@ -154,12 +159,8 @@ config ARM_HAS_GROUP_RELOCS
 	  which is usually sufficient, but not for allyesconfig, so we disable
 	  this feature when doing compile testing.
 
-config ARM_HAS_SG_CHAIN
-	bool
-
 config ARM_DMA_USE_IOMMU
 	bool
-	select ARM_HAS_SG_CHAIN
 	select NEED_SG_DMA_LENGTH
 
 if ARM_DMA_USE_IOMMU
@@ -245,7 +246,7 @@ config ARCH_MTD_XIP
 config ARM_PATCH_PHYS_VIRT
 	bool "Patch physical to virtual translations at runtime" if EMBEDDED
 	default y
-	depends on !XIP_KERNEL && MMU
+	depends on MMU
 	help
 	  Patch phys-to-virt and virt-to-phys translation functions at
 	  boot and module load time according to the position of the
@@ -274,7 +275,7 @@ config NEED_MACH_MEMORY_H
 
 config PHYS_OFFSET
 	hex "Physical address of main memory" if MMU
-	depends on !ARM_PATCH_PHYS_VIRT
+	depends on !ARM_PATCH_PHYS_VIRT || !AUTO_ZRELADDR
 	default DRAM_BASE if !MMU
 	default 0x00000000 if ARCH_FOOTBRIDGE
 	default 0x10000000 if ARCH_OMAP1 || ARCH_RPC
@@ -307,13 +308,8 @@ config MMU
 config ARM_SINGLE_ARMV7M
 	def_bool !MMU
 	select ARM_NVIC
-	select AUTO_ZRELADDR
-	select TIMER_OF
-	select COMMON_CLK
 	select CPU_V7M
 	select NO_IOPORT_MAP
-	select SPARSE_IRQ
-	select USE_OF
 
 config ARCH_MMAP_RND_BITS_MIN
 	default 8
@@ -323,94 +319,31 @@ config ARCH_MMAP_RND_BITS_MAX
 	default 15 if PAGE_OFFSET=0x80000000
 	default 16
 
-#
-# The "ARM system type" choice list is ordered alphabetically by option
-# text.  Please add new entries in the option alphabetic order.
-#
-choice
-	prompt "ARM system type"
-	depends on MMU
-	default ARCH_MULTIPLATFORM
-
 config ARCH_MULTIPLATFORM
-	bool "Allow multiple platforms to be selected"
-	select ARCH_FLATMEM_ENABLE
-	select ARCH_SPARSEMEM_ENABLE
-	select ARCH_SELECT_MEMORY_MODEL
-	select ARM_HAS_SG_CHAIN
-	select ARM_PATCH_PHYS_VIRT
-	select AUTO_ZRELADDR
-	select TIMER_OF
-	select COMMON_CLK
-	select HAVE_PCI
-	select PCI_DOMAINS_GENERIC if PCI
-	select SPARSE_IRQ
-	select USE_OF
-
-config ARCH_FOOTBRIDGE
-	bool "FootBridge"
-	depends on CPU_LITTLE_ENDIAN
-	depends on ATAGS
-	select CPU_SA110
-	select FOOTBRIDGE
-	select NEED_MACH_MEMORY_H
-	help
-	  Support for systems based on the DC21285 companion chip
-	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
-
-config ARCH_RPC
-	bool "RiscPC"
-	depends on !CC_IS_CLANG && GCC_VERSION < 90100 && GCC_VERSION >= 60000
-	depends on CPU_LITTLE_ENDIAN
-	depends on ATAGS
-	select ARCH_ACORN
-	select ARCH_MAY_HAVE_PC_FDC
-	select ARCH_SPARSEMEM_ENABLE
-	select ARM_HAS_SG_CHAIN
-	select CPU_SA110
-	select FIQ
-	select HAVE_PATA_PLATFORM
-	select ISA_DMA_API
-	select LEGACY_TIMER_TICK
-	select NEED_MACH_IO_H
-	select NEED_MACH_MEMORY_H
-	select NO_IOPORT_MAP
+	bool "Require kernel to be portable to multiple machines" if EXPERT
+	depends on MMU && !(ARCH_FOOTBRIDGE || ARCH_RPC || ARCH_SA1100)
+	default y
 	help
-	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
-	  CD-ROM interface, serial and parallel port, and the floppy drive.
+	  In general, all Arm machines can be supported in a single
+	  kernel image, covering either Armv4/v5 or Armv6/v7.
 
-config ARCH_SA1100
-	bool "SA1100-based"
-	depends on CPU_LITTLE_ENDIAN
-	depends on ATAGS
-	select ARCH_MTD_XIP
-	select ARCH_SPARSEMEM_ENABLE
-	select CLKSRC_MMIO
-	select CLKSRC_PXA
-	select TIMER_OF if OF
-	select COMMON_CLK
-	select CPU_FREQ
-	select CPU_SA1100
-	select GPIOLIB
-	select IRQ_DOMAIN
-	select ISA
-	select NEED_MACH_MEMORY_H
-	select SPARSE_IRQ
-	help
-	  Support for StrongARM 11x0 based boards.
+	  However, some configuration options require hardcoding machine
+	  specific physical addresses or enable errata workarounds that may
+	  break other machines.
 
-endchoice
+	  Selecting N here allows using those options, including
+	  DEBUG_UNCOMPRESS, XIP_KERNEL and ZBOOT_ROM. If unsure, say Y.
 
-menu "Multiple platform selection"
-	depends on ARCH_MULTIPLATFORM
+menu "Platform selection"
+	depends on MMU
 
 comment "CPU Core family selection"
 
 config ARCH_MULTI_V4
-	bool "ARMv4 based platforms (FA526)"
+	bool "ARMv4 based platforms (FA526, StrongARM)"
 	depends on !ARCH_MULTI_V6_V7
 	select ARCH_MULTI_V4_V5
-	select CPU_FA526
+	select CPU_FA526 if !(CPU_SA110 || CPU_SA1100)
 
 config ARCH_MULTI_V4T
 	bool "ARMv4T based platforms (ARM720T, ARM920T, ...)"
@@ -472,7 +405,6 @@ config ARCH_AIROHA
 	select ARM_GIC_V3
 	select ARM_PSCI
 	select HAVE_ARM_ARCH_TIMER
-	select COMMON_CLK
 	help
 	  Support for Airoha EN7523 SoCs
 
@@ -573,6 +505,8 @@ source "arch/arm/mach-rda/Kconfig"
 
 source "arch/arm/mach-realtek/Kconfig"
 
+source "arch/arm/mach-rpc/Kconfig"
+
 source "arch/arm/mach-rockchip/Kconfig"
 
 source "arch/arm/mach-s3c/Kconfig"
@@ -638,7 +572,6 @@ config ARCH_ACORN
 config PLAT_ORION
 	bool
 	select CLKSRC_MMIO
-	select COMMON_CLK
 	select GENERIC_IRQ_CHIP
 	select IRQ_DOMAIN
 
@@ -989,11 +922,6 @@ config ISA
 	  (MCA) or VESA.  ISA is an older system, now being displaced by PCI;
 	  newer boards don't support it.  If you have ISA, say Y, otherwise N.
 
-# Select ISA DMA controller support
-config ISA_DMA
-	bool
-	select ISA_DMA_API
-
 # Select ISA DMA interface
 config ISA_DMA_API
 	bool
@@ -1054,7 +982,7 @@ config SMP
 
 config SMP_ON_UP
 	bool "Allow booting SMP kernel on uniprocessor systems"
-	depends on SMP && !XIP_KERNEL && MMU
+	depends on SMP && MMU
 	default y
 	help
 	  SMP kernels contain instructions which fail on non-SMP processors.
@@ -1303,7 +1231,7 @@ config THUMB2_KERNEL
 
 config ARM_PATCH_IDIV
 	bool "Runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()"
-	depends on CPU_32v7 && !XIP_KERNEL
+	depends on CPU_32v7
 	default y
 	help
 	  The ARM compiler inserts calls to __aeabi_idiv() and
@@ -1358,13 +1286,13 @@ config OABI_COMPAT
 	  at all). If in doubt say N.
 
 config ARCH_SELECT_MEMORY_MODEL
-	bool
+	def_bool y
 
 config ARCH_FLATMEM_ENABLE
-	bool
+	def_bool !(ARCH_RPC || ARCH_SA1100)
 
 config ARCH_SPARSEMEM_ENABLE
-	bool
+	def_bool !ARCH_FOOTBRIDGE
 	select SPARSEMEM_STATIC if SPARSEMEM
 
 config HIGHMEM
@@ -1671,7 +1599,6 @@ config CMDLINE
 choice
 	prompt "Kernel command line type" if CMDLINE != ""
 	default CMDLINE_FROM_BOOTLOADER
-	depends on ATAGS
 
 config CMDLINE_FROM_BOOTLOADER
 	bool "Use bootloader kernel arguments if available"
@@ -1698,6 +1625,7 @@ endchoice
 config XIP_KERNEL
 	bool "Kernel Execute-In-Place from ROM"
 	depends on !ARM_LPAE && !ARCH_MULTIPLATFORM
+	depends on !ARM_PATCH_IDIV && !ARM_PATCH_PHYS_VIRT && !SMP_ON_UP
 	help
 	  Execute-In-Place allows the kernel to run from non-volatile storage
 	  directly addressable by the CPU, such as NOR flash. This saves RAM
@@ -1772,7 +1700,8 @@ config CRASH_DUMP
 	  For more details see Documentation/admin-guide/kdump/kdump.rst
 
 config AUTO_ZRELADDR
-	bool "Auto calculation of the decompressed kernel image address"
+	bool "Auto calculation of the decompressed kernel image address" if !ARCH_MULTIPLATFORM
+	default !(ARCH_FOOTBRIDGE || ARCH_RPC || ARCH_SA1100)
 	help
 	  ZRELADDR is the physical address where the decompressed kernel
 	  image will be placed. If AUTO_ZRELADDR is selected, the address

arch/arm/Kconfig.debug

@@ -1904,7 +1904,8 @@ config DEBUG_UART_8250_PALMCHIP
 
 config DEBUG_UNCOMPRESS
 	bool "Enable decompressor debugging via DEBUG_LL output"
-	depends on ARCH_MULTIPLATFORM || PLAT_SAMSUNG || ARM_SINGLE_ARMV7M
+	depends on !ARCH_MULTIPLATFORM
+	depends on !(ARCH_FOOTBRIDGE || ARCH_RPC || ARCH_SA1100)
 	depends on DEBUG_LL && !DEBUG_OMAP2PLUS_UART && \
 		     (!DEBUG_TEGRA_UART || !ZBOOT_ROM) && \
 		     !DEBUG_BRCMSTB_UART && !DEBUG_SEMIHOSTING
@@ -1921,9 +1922,8 @@ config DEBUG_UNCOMPRESS
 
 config UNCOMPRESS_INCLUDE
 	string
-	default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM || \
-					PLAT_SAMSUNG || ARM_SINGLE_ARMV7M
-	default "mach/uncompress.h"
+	default "mach/uncompress.h" if ARCH_FOOTBRIDGE || ARCH_RPC || ARCH_SA1100
+	default "debug/uncompress.h"
 
 config EARLY_PRINTK
 	bool "Early printk"

arch/arm/Makefile

@@ -227,40 +227,24 @@ machine-$(CONFIG_ARCH_ZYNQ)		+= zynq
 machine-$(CONFIG_PLAT_VERSATILE)	+= versatile
 machine-$(CONFIG_PLAT_SPEAR)		+= spear
 
-# Platform directory name.  This list is sorted alphanumerically
-# by CONFIG_* macro name.
-plat-$(CONFIG_PLAT_ORION)	+= orion
+# legacy platforms provide their own mach/*.h headers globally,
+# these three are mutually exclusive
+machdirs-$(CONFIG_ARCH_FOOTBRIDGE)	+= arch/arm/mach-footbridge
+machdirs-$(CONFIG_ARCH_RPC)		+= arch/arm/mach-rpc
+machdirs-$(CONFIG_ARCH_SA1100)		+= arch/arm/mach-sa1100
+KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%/include,$(machdirs-y))
 
 # The byte offset of the kernel image in RAM from the start of RAM.
 TEXT_OFFSET := $(textofs-y)
 
-# The first directory contains additional information for the boot setup code
-ifneq ($(machine-y),)
-MACHINE  := arch/arm/mach-$(word 1,$(machine-y))/
-else
-MACHINE  :=
-endif
-ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y)
-MACHINE  :=
-endif
-
-machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
-platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y)))
-
-ifneq ($(CONFIG_ARCH_MULTIPLATFORM),y)
-ifneq ($(CONFIG_ARM_SINGLE_ARMV7M),y)
-KBUILD_CPPFLAGS += $(patsubst %,-I$(srctree)/%include,$(machdirs) $(platdirs))
-endif
-endif
-
 export	TEXT_OFFSET GZFLAGS MMUEXT
 
 # If we have a machine-specific directory, then include it in the build.
-core-y				+= $(machdirs) $(platdirs)
-
+core-y				+= $(patsubst %,arch/arm/mach-%/,$(machine-y))
 # For cleaning
-core-				+= $(patsubst %,arch/arm/mach-%/, $(machine-))
-core-				+= $(patsubst %,arch/arm/plat-%/, $(plat-))
+core-				+= $(patsubst %,arch/arm/mach-%/,$(machine-))
+
+core-$(CONFIG_PLAT_ORION)	+= arch/arm/plat-orion/
 
 libs-y				:= arch/arm/lib/ $(libs-y)
 
@@ -313,7 +297,7 @@ bootpImage uImage: zImage
 zImage: Image
 
 $(BOOT_TARGETS): vmlinux
-	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
+	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 	@$(kecho) '  Kernel: $(boot)/$@ is ready'
 
 $(INSTALL_TARGETS): KBUILD_IMAGE = $(boot)/$(patsubst %install,%Image,$@)
@@ -327,7 +311,7 @@ ifeq ($(CONFIG_VDSO),y)
 endif
 
 # My testing targets (bypasses dependencies)
-bp:;	$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/bootpImage
+bp:;	$(Q)$(MAKE) $(build)=$(boot) $(boot)/bootpImage
 
 
 define archhelp

arch/arm/boot/Makefile

@@ -10,22 +10,16 @@
 #
 # Copyright (C) 1995-2002 Russell King
 #
-
 OBJCOPYFLAGS	:=-O binary -R .comment -S
 
-ifneq ($(MACHINE),)
-include $(MACHINE)/Makefile.boot
-endif
-
-# Note: the following conditions must always be true:
 #   ZRELADDR == virt_to_phys(PAGE_OFFSET + TEXT_OFFSET)
-#   PARAMS_PHYS must be within 4MB of ZRELADDR
-#   INITRD_PHYS must be in RAM
-ZRELADDR    := $(zreladdr-y)
-PARAMS_PHYS := $(params_phys-y)
-INITRD_PHYS := $(initrd_phys-y)
+ifdef CONFIG_PHYS_OFFSET
+add_hex = $(shell printf 0x%x $$(( $(1) + $(2) )) )
+ZRELADDR    := $(call add_hex, $(CONFIG_PHYS_OFFSET), $(TEXT_OFFSET))
+endif
 
-export ZRELADDR INITRD_PHYS PARAMS_PHYS
+PHYS_OFFSET := $(CONFIG_PHYS_OFFSET)
+export ZRELADDR PARAMS_PHYS PHYS_OFFSET
 
 targets := Image zImage xipImage bootpImage uImage
 
@@ -90,17 +84,10 @@ $(obj)/uImage:	$(obj)/zImage FORCE
 	@$(check_for_multiple_loadaddr)
 	$(call if_changed,uimage)
 
-$(obj)/bootp/bootp: $(obj)/zImage initrd FORCE
+$(obj)/bootp/bootp: $(obj)/zImage FORCE
 	$(Q)$(MAKE) $(build)=$(obj)/bootp $@
 
 $(obj)/bootpImage: $(obj)/bootp/bootp FORCE
 	$(call if_changed,objcopy)
 
-PHONY += initrd
-initrd:
-	@test "$(INITRD_PHYS)" != "" || \
-	(echo This machine does not support INITRD; exit -1)
-	@test "$(INITRD)" != "" || \
-	(echo You must specify INITRD; exit -1)
-
 subdir-	    := bootp compressed dts

arch/arm/boot/bootp/Makefile

@@ -5,9 +5,40 @@
 # This file is included by the global makefile so that you can add your own
 # architecture-specific flags and dependencies.
 #
-
 GCOV_PROFILE	:= n
 
+ifdef PHYS_OFFSET
+add_hex = $(shell printf 0x%x $$(( $(1) + $(2) )) )
+
+# If PHYS_OFFSET is set, INITRD_PHYS and PARAMS_PHYS can be derived,
+# otherwise they must be passed on the command line.
+#
+# Note: the following conditions must always be true:
+#   PARAMS_PHYS must be within 4MB of ZRELADDR
+#   INITRD_PHYS must be in RAM
+
+PARAMS_PHYS := $(call add_hex, $(PHYS_OFFSET), 0x100)
+
+# guess an initrd location if possible
+initrd_offset-$(CONFIG_ARCH_FOOTBRIDGE)	+= 0x00800000
+initrd_offset-$(CONFIG_ARCH_SA1100)	+= 0x00800000
+initrd_offset-$(CONFIG_ARCH_RPC)	+= 0x08000000
+INITRD_OFFSET := $(initrd_offset-y)
+ifdef INITRD_OFFSET
+INITRD_PHYS := $(call add_hex, $(PHYS_OFFSET), $(INITRD_OFFSET))
+endif
+
+endif
+
+PHONY += initrd
+initrd:
+	@test "$(PARAMS_PHYS)" != "" || \
+	(echo bootpImage: You must specify PHYS_OFFSET of PARAMS_PHYS ; exit -1)
+	@test "$(INITRD_PHYS)" != "" || \
+	(echo bootpImage: You must specify INITRD_OFFSET or INITRD_PHYS ; exit -1)
+	@test "$(INITRD)" != "" || \
+	(echo bootpImage: You must specify INITRD; exit -1)
+
 LDFLAGS_bootp	:= --no-undefined -X \
 		 --defsym initrd_phys=$(INITRD_PHYS) \
 		 --defsym params_phys=$(PARAMS_PHYS) -T
@@ -24,6 +55,6 @@ $(obj)/bootp:	$(src)/bootp.lds $(addprefix $(obj)/,init.o kernel.o initrd.o) FOR
 
 $(obj)/kernel.o: arch/arm/boot/zImage FORCE
 
-$(obj)/initrd.o: $(INITRD) FORCE
+$(obj)/initrd.o: initrd $(INITRD) FORCE
 
 PHONY += $(INITRD)

arch/arm/configs/assabet_defconfig

 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_ASSABET=y
 CONFIG_CMDLINE="mem=32M console=ttySA0,38400n8 initrd=0xc0800000,3M root=/dev/ram"

arch/arm/configs/badge4_defconfig

 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_EXPERT=y
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_BADGE4=y
 CONFIG_UNUSED_BOARD_FILES=y

arch/arm/configs/cerfcube_defconfig

 CONFIG_SYSVIPC=y
 CONFIG_BSD_PROCESS_ACCT=y
 CONFIG_LOG_BUF_SHIFT=14
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_CERF=y
 CONFIG_SA1100_CERF_FLASH_16MB=y

arch/arm/configs/collie_defconfig

@@ -5,6 +5,8 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_EXPERT=y
 # CONFIG_BASE_FULL is not set
 # CONFIG_EPOLL is not set
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_COLLIE=y
 CONFIG_CMDLINE="noinitrd root=/dev/mtdblock2 rootfstype=jffs2 fbcon=rotate:1"

arch/arm/configs/footbridge_defconfig

@@ -4,6 +4,8 @@ CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_EXPERT=y
 # CONFIG_HOTPLUG is not set
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_FOOTBRIDGE=y
 CONFIG_ARCH_EBSA285_HOST=y
 CONFIG_ARCH_NETWINDER=y

arch/arm/configs/h3600_defconfig

@@ -4,6 +4,8 @@ CONFIG_HIGH_RES_TIMERS=y
 CONFIG_PREEMPT=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_H3600=y
 # CONFIG_CPU_FREQ_STAT is not set

arch/arm/configs/hackkit_defconfig

 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_HACKKIT=y
 CONFIG_UNUSED_BOARD_FILES=y

arch/arm/configs/jornada720_defconfig

 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_SYSFS_DEPRECATED_V2=y
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_JORNADA720=y
 CONFIG_SA1100_JORNADA720_SSP=y

arch/arm/configs/lart_defconfig

 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_LART=y
 CONFIG_UNUSED_BOARD_FILES=y

arch/arm/configs/neponset_defconfig

 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_ASSABET=y
 CONFIG_ASSABET_NEPONSET=y

arch/arm/configs/netwinder_defconfig

 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_FOOTBRIDGE=y
 CONFIG_ARCH_NETWINDER=y
 CONFIG_DEPRECATED_PARAM_STRUCT=y

arch/arm/configs/pleb_defconfig

@@ -4,6 +4,8 @@ CONFIG_BLK_DEV_INITRD=y
 CONFIG_EXPERT=y
 # CONFIG_HOTPLUG is not set
 # CONFIG_SHMEM is not set
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_PLEB=y
 CONFIG_UNUSED_BOARD_FILES=y

arch/arm/configs/rpc_defconfig

@@ -4,6 +4,8 @@ CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_MODULES=y
 CONFIG_MODULE_UNLOAD=y
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_RPC=y
 CONFIG_CPU_SA110=y
 CONFIG_FPE_NWFPE=y

arch/arm/configs/shannon_defconfig

 CONFIG_SYSVIPC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_SHANNON=y
 CONFIG_UNUSED_BOARD_FILES=y

arch/arm/configs/simpad_defconfig

@@ -5,6 +5,8 @@ CONFIG_LOG_BUF_SHIFT=14
 CONFIG_EXPERT=y
 CONFIG_KALLSYMS_ALL=y
 CONFIG_KALLSYMS_EXTRA_PASS=y
+CONFIG_ARCH_MULTI_V4=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_SA1100=y
 CONFIG_SA1100_SIMPAD=y
 CONFIG_UNUSED_BOARD_FILES=y

arch/arm/include/asm/dma-direct.h

-#include <mach/dma-direct.h>

arch/arm/include/asm/dma.h

@@ -106,7 +106,7 @@ extern void set_dma_sg(unsigned int chan, struct scatterlist *sg, int nr_sg);
  */
 extern void __set_dma_addr(unsigned int chan, void *addr);
 #define set_dma_addr(chan, addr)				\
-	__set_dma_addr(chan, (void *)__bus_to_virt(addr))
+	__set_dma_addr(chan, (void *)isa_bus_to_virt(addr))
 
 /* Set the DMA byte count for this channel
  *

arch/arm/include/asm/hardware/dec21285.h

@@ -22,6 +22,13 @@
 #define DC21285_IO(x)		(x)
 #endif
 
+/*
+ * The footbridge is programmed to expose the system RAM at 0xe0000000.
+ * The requirement is that the RAM isn't placed at bus address 0, which
+ * would clash with VGA cards.
+ */
+#define BUS_OFFSET 0xe0000000
+
 #define CSR_PCICMD		DC21285_IO(0x0004)
 #define CSR_CLASSREV		DC21285_IO(0x0008)
 #define CSR_PCICACHELINESIZE	DC21285_IO(0x000c)
@@ -81,19 +88,6 @@
 #define SA110_CNTL_XCSDIR(x)		((x)<<28)
 #define SA110_CNTL_PCICFN		(1 << 31)
 
-/*
- * footbridge_cfn_mode() is used when we want
- * to check whether we are the central function
- */
-#define __footbridge_cfn_mode() (*CSR_SA110_CNTL & SA110_CNTL_PCICFN)
-#if defined(CONFIG_FOOTBRIDGE_HOST) && defined(CONFIG_FOOTBRIDGE_ADDIN)
-#define footbridge_cfn_mode() __footbridge_cfn_mode()
-#elif defined(CONFIG_FOOTBRIDGE_HOST)
-#define footbridge_cfn_mode() (1)
-#else
-#define footbridge_cfn_mode() (0)
-#endif
-
 #define CSR_PCIADDR_EXTN	DC21285_IO(0x0140)
 #define CSR_PREFETCHMEMRANGE	DC21285_IO(0x0144)
 #define CSR_XBUS_CYCLE		DC21285_IO(0x0148)

arch/arm/include/asm/mach/dma.h

@@ -44,8 +44,3 @@ struct dma_struct {
  * isa_dma_add - add an ISA-style DMA channel
  */
 extern int isa_dma_add(unsigned int, dma_t *dma);
-
-/*
- * Add the ISA DMA controller.  Always takes channels 0-7.
- */
-extern void isa_init_dma(void);

arch/arm/include/asm/memory.h

@@ -369,17 +369,6 @@ static inline unsigned long __virt_to_idmap(unsigned long x)
 
 #define virt_to_idmap(x)	__virt_to_idmap((unsigned long)(x))
 
-/*
- * Virtual <-> DMA view memory address translations
- * Again, these are *only* valid on the kernel direct mapped RAM
- * memory.  Use of these is *deprecated* (and that doesn't mean
- * use the __ prefixed forms instead.)  See dma-mapping.h.
- */
-#ifndef __virt_to_bus
-#define __virt_to_bus	__virt_to_phys
-#define __bus_to_virt	__phys_to_virt
-#endif
-
 /*
  * Conversion between a struct page and a physical address.
  *

arch/arm/kernel/Makefile

@@ -45,7 +45,6 @@ obj-$(CONFIG_ISA_DMA_API)	+= dma.o
 obj-$(CONFIG_FIQ)		+= fiq.o fiqasm.o
 obj-$(CONFIG_MODULES)		+= armksyms.o module.o
 obj-$(CONFIG_ARM_MODULE_PLTS)	+= module-plts.o
-obj-$(CONFIG_ISA_DMA)		+= dma-isa.o
 obj-$(CONFIG_PCI)		+= bios32.o isa.o
 obj-$(CONFIG_ARM_CPU_SUSPEND)	+= sleep.o suspend.o
 obj-$(CONFIG_HIBERNATION)	+= hibernate.o

arch/arm/kernel/devtree.c

@@ -194,14 +194,12 @@ const struct machine_desc * __init setup_machine_fdt(void *dt_virt)
 {
 	const struct machine_desc *mdesc, *mdesc_best = NULL;
 
-#if defined(CONFIG_ARCH_MULTIPLATFORM) || defined(CONFIG_ARM_SINGLE_ARMV7M)
 	DT_MACHINE_START(GENERIC_DT, "Generic DT based system")
 		.l2c_aux_val = 0x0,
 		.l2c_aux_mask = ~0x0,
 	MACHINE_END
 
 	mdesc_best = &__mach_desc_GENERIC_DT;
-#endif
 
 	if (!dt_virt || !early_init_dt_verify(dt_virt))
 		return NULL;

arch/arm/mach-at91/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-# Empty file waiting for deletion once Makefile.boot isn't needed any more.
-# Patch waits for application at
-# https://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7889/1 .

arch/arm/mach-davinci/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0
-zreladdr-$(CONFIG_ARCH_DAVINCI_DA8XX)		+= 0xc0008000
-params_phys-$(CONFIG_ARCH_DAVINCI_DA8XX)	:= 0xc0000100
-initrd_phys-$(CONFIG_ARCH_DAVINCI_DA8XX)	:= 0xc0800000
-
-zreladdr-$(CONFIG_ARCH_DAVINCI_DMx)		+= 0x80008000
-params_phys-$(CONFIG_ARCH_DAVINCI_DMx)		:= 0x80000100
-initrd_phys-$(CONFIG_ARCH_DAVINCI_DMx)		:= 0x80800000

arch/arm/mach-dove/Makefile

 # SPDX-License-Identifier: GPL-2.0
-ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/plat-orion/include
+ccflags-y := -I$(srctree)/arch/arm/plat-orion/include
 
 obj-y				+= common.o
 obj-$(CONFIG_DOVE_LEGACY)	+= irq.o mpp.o

arch/arm/mach-dove/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-   zreladdr-y	+= 0x00008000
-params_phys-y	:= 0x00000100
-initrd_phys-y	:= 0x00800000

arch/arm/mach-ep93xx/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-# Empty file waiting for deletion once Makefile.boot isn't needed any more.

arch/arm/mach-footbridge/Kconfig

 # SPDX-License-Identifier: GPL-2.0-only
-if ARCH_FOOTBRIDGE
+menuconfig ARCH_FOOTBRIDGE
+	bool "FootBridge Implementations"
+	depends on ARCH_MULTI_V4 && !(ARCH_MULTI_V4T || ARCH_MULTI_V5)
+	depends on !(ARCH_MOXART || ARCH_GEMINI || ARCH_SA1100)
+	depends on ATAGS
+	depends on CPU_LITTLE_ENDIAN
+	depends on MMU
+	select ARCH_NO_SG_CHAIN
+	select CPU_SA110
+	select FOOTBRIDGE
+	select NEED_MACH_MEMORY_H
+	help
+	  Support for systems based on the DC21285 companion chip
+	  ("FootBridge"), such as the Simtec CATS and the Rebel NetWinder.
 
-menu "Footbridge Implementations"
+if ARCH_FOOTBRIDGE
 
 config ARCH_CATS
 	bool "CATS"
 	depends on UNUSED_BOARD_FILES
 	select CLKEVT_I8253
 	select CLKSRC_I8253
-	select FOOTBRIDGE_HOST
 	select ISA
-	select ISA_DMA
 	select FORCE_PCI
 	help
 	  Say Y here if you intend to run this kernel on the CATS.
 
 	  Saying N will reduce the size of the Footbridge kernel.
 
-config ARCH_EBSA285_ADDIN
-	bool "EBSA285 (addin mode)"
-	select ARCH_EBSA285
-	select FOOTBRIDGE_ADDIN
-	help
-	  Say Y here if you intend to run this kernel on the EBSA285 card
-	  in addin mode.
-
-	  Saying N will reduce the size of the Footbridge kernel.
-
 config ARCH_EBSA285_HOST
 	bool "EBSA285 (host mode)"
 	select ARCH_EBSA285
-	select FOOTBRIDGE_HOST
 	select ISA
-	select ISA_DMA
 	select ARCH_MAY_HAVE_PC_FDC
 	select FORCE_PCI
 	help
@@ -45,9 +44,7 @@ config ARCH_NETWINDER
 	bool "NetWinder"
 	select CLKEVT_I8253
 	select CLKSRC_I8253
-	select FOOTBRIDGE_HOST
 	select ISA
-	select ISA_DMA
 	select FORCE_PCI
 	help
 	  Say Y here if you intend to run this kernel on the Rebel.COM
@@ -57,23 +54,12 @@ config ARCH_NETWINDER
 
 	  Saying N will reduce the size of the Footbridge kernel.
 
-endmenu
-
 # Footbridge support
 config FOOTBRIDGE
-	select ARCH_HAS_PHYS_TO_DMA
-	bool
-
-# Footbridge in host mode
-config FOOTBRIDGE_HOST
-	bool
+	def_bool y
 	select ARCH_MIGHT_HAVE_PC_SERIO
+	select ISA_DMA_API
 
-# Footbridge in addin mode
-config FOOTBRIDGE_ADDIN
-	bool
-
-# EBSA285 board in either host or addin mode
 config ARCH_EBSA285
 	bool
 

arch/arm/mach-footbridge/Makefile

@@ -5,11 +5,11 @@
 
 # Object file lists.
 
-obj-y			:= common.o dma.o isa-irq.o
+obj-y			:= common.o isa-irq.o isa.o isa-rtc.o dma-isa.o
 
 pci-y			+= dc21285.o
 pci-$(CONFIG_ARCH_CATS) += cats-pci.o
-pci-$(CONFIG_ARCH_EBSA285_HOST) += ebsa285-pci.o
+pci-$(CONFIG_ARCH_EBSA285) += ebsa285-pci.o
 pci-$(CONFIG_ARCH_NETWINDER) += netwinder-pci.o
 
 obj-$(CONFIG_ARCH_CATS) += cats-hw.o isa-timer.o
@@ -18,4 +18,3 @@ obj-$(CONFIG_ARCH_NETWINDER) += netwinder-hw.o isa-timer.o
 
 obj-$(CONFIG_PCI)	+=$(pci-y)
 
-obj-$(CONFIG_ISA)	+= isa.o isa-rtc.o

arch/arm/mach-footbridge/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-   zreladdr-y	+= 0x00008000
-params_phys-y	:= 0x00000100
-initrd_phys-y	:= 0x00800000
-

arch/arm/mach-footbridge/common.c

@@ -198,9 +198,6 @@ void __init footbridge_init_irq(void)
 
 	__fb_init_irq();
 
-	if (!footbridge_cfn_mode())
-		return;
-
 	if (machine_is_ebsa285())
 		/* The following is dependent on which slot
 		 * you plug the Southbridge card into.  We
@@ -221,21 +218,13 @@ void __init footbridge_init_irq(void)
  * commented out since there is a "No Fix" problem with it.  Not mapping
  * it means that we have extra bullet protection on our feet.
  */
-static struct map_desc fb_common_io_desc[] __initdata = {
+static struct map_desc ebsa285_host_io_desc[] __initdata = {
 	{
 		.virtual	= ARMCSR_BASE,
 		.pfn		= __phys_to_pfn(DC21285_ARMCSR_BASE),
 		.length		= ARMCSR_SIZE,
 		.type		= MT_DEVICE,
-	}
-};
-
-/*
- * The mapping when the footbridge is in host mode.  We don't map any of
- * this when we are in add-in mode.
- */
-static struct map_desc ebsa285_host_io_desc[] __initdata = {
-#if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_FOOTBRIDGE_HOST)
+	},
 	{
 		.virtual	= PCIMEM_BASE,
 		.pfn		= __phys_to_pfn(DC21285_PCI_MEM),
@@ -257,26 +246,12 @@ static struct map_desc ebsa285_host_io_desc[] __initdata = {
 		.length		= PCIIACK_SIZE,
 		.type		= MT_DEVICE,
 	},
-#endif
 };
 
 void __init footbridge_map_io(void)
 {
-	/*
-	 * Set up the common mapping first; we need this to
-	 * determine whether we're in host mode or not.
-	 */
-	iotable_init(fb_common_io_desc, ARRAY_SIZE(fb_common_io_desc));
-
-	/*
-	 * Now, work out what we've got to map in addition on this
-	 * platform.
-	 */
-	if (footbridge_cfn_mode()) {
 	iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
 	pci_map_io_early(__phys_to_pfn(DC21285_PCI_IO));
-	}
-
 	vga_base = PCIMEM_BASE;
 }
 
@@ -306,49 +281,3 @@ void footbridge_restart(enum reboot_mode mode, const char *cmd)
 		*CSR_SA110_CNTL |= (1 << 13);
 	}
 }
-
-#ifdef CONFIG_FOOTBRIDGE_ADDIN
-
-static inline unsigned long fb_bus_sdram_offset(void)
-{
-	return *CSR_PCISDRAMBASE & 0xfffffff0;
-}
-
-/*
- * These two functions convert virtual addresses to PCI addresses and PCI
- * addresses to virtual addresses.  Note that it is only legal to use these
- * on memory obtained via get_zeroed_page or kmalloc.
- */
-unsigned long __virt_to_bus(unsigned long res)
-{
-	WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
-
-	return res + (fb_bus_sdram_offset() - PAGE_OFFSET);
-}
-EXPORT_SYMBOL(__virt_to_bus);
-
-unsigned long __bus_to_virt(unsigned long res)
-{
-	res = res - (fb_bus_sdram_offset() - PAGE_OFFSET);
-
-	WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory);
-
-	return res;
-}
-EXPORT_SYMBOL(__bus_to_virt);
-#else
-static inline unsigned long fb_bus_sdram_offset(void)
-{
-	return BUS_OFFSET;
-}
-#endif /* CONFIG_FOOTBRIDGE_ADDIN */
-
-dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
-{
-	return paddr + (fb_bus_sdram_offset() - PHYS_OFFSET);
-}
-
-phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
-{
-	return dev_addr - (fb_bus_sdram_offset() - PHYS_OFFSET);
-}

arch/arm/mach-footbridge/dc21285.c

@@ -5,6 +5,7 @@
  *  Copyright (C) 1998-2001 Russell King
  *  Copyright (C) 1998-2000 Phil Blundell
  */
+#include <linux/dma-map-ops.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/interrupt.h>
@@ -241,13 +242,26 @@ static irqreturn_t dc21285_parity_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
+static int dc21285_pci_bus_notifier(struct notifier_block *nb,
+				    unsigned long action,
+				    void *data)
+{
+	if (action != BUS_NOTIFY_ADD_DEVICE)
+		return NOTIFY_DONE;
+
+	dma_direct_set_offset(data, PHYS_OFFSET, BUS_OFFSET, SZ_256M);
+
+	return NOTIFY_OK;
+}
+
+static struct notifier_block dc21285_pci_bus_nb = {
+	.notifier_call = dc21285_pci_bus_notifier,
+};
+
 int __init dc21285_setup(int nr, struct pci_sys_data *sys)
 {
 	struct resource *res;
 
-	if (nr || !footbridge_cfn_mode())
-		return 0;
-
 	res = kcalloc(2, sizeof(struct resource), GFP_KERNEL);
 	if (!res) {
 		printk("out of memory for root bus resources");
@@ -269,6 +283,8 @@ int __init dc21285_setup(int nr, struct pci_sys_data *sys)
 	pci_add_resource_offset(&sys->resources, &res[0], sys->mem_offset);
 	pci_add_resource_offset(&sys->resources, &res[1], sys->mem_offset);
 
+	bus_register_notifier(&pci_bus_type, &dc21285_pci_bus_nb);
+
 	return 1;
 }
 
@@ -278,7 +294,6 @@ int __init dc21285_setup(int nr, struct pci_sys_data *sys)
 void __init dc21285_preinit(void)
 {
 	unsigned int mem_size, mem_mask;
-	int cfn_mode;
 
 	pcibios_min_mem = 0x81000000;
 
@@ -298,21 +313,15 @@ void __init dc21285_preinit(void)
 	*CSR_CSRBASEOFFSET    = 0;
 	*CSR_PCIADDR_EXTN     = 0;
 
-	cfn_mode = __footbridge_cfn_mode();
-
 	printk(KERN_INFO "PCI: DC21285 footbridge, revision %02lX, in "
-		"%s mode\n", *CSR_CLASSREV & 0xff, cfn_mode ?
-		"central function" : "addin");
+		"central function mode\n", *CSR_CLASSREV & 0xff);
 
-	if (footbridge_cfn_mode()) {
 	/*
 	 * Clear any existing errors - we aren't
 	 * interested in historical data...
 	 */
-		*CSR_SA110_CNTL	= (*CSR_SA110_CNTL & 0xffffde07) |
-				  SA110_CNTL_RXSERR;
+	*CSR_SA110_CNTL	= (*CSR_SA110_CNTL & 0xffffde07) | SA110_CNTL_RXSERR;
 	*CSR_PCICMD = (*CSR_PCICMD & 0xffff) | PCICMD_ERROR_BITS;
-	}
 
 	timer_setup(&serr_timer, dc21285_enable_error, 0);
 	timer_setup(&perr_timer, dc21285_enable_error, 0);
@@ -331,7 +340,6 @@ void __init dc21285_preinit(void)
 	dc21285_request_irq(IRQ_PCI_DPERR, dc21285_dparity_irq, 0,
 			    "PCI data parity", NULL);
 
-	if (cfn_mode) {
 	/*
 	 * Map our SDRAM at a known address in PCI space, just in case
 	 * the firmware had other ideas.  Using a nonzero base is
@@ -340,20 +348,10 @@ void __init dc21285_preinit(void)
 	 */
 	*CSR_PCICSRBASE       = 0xf4000000;
 	*CSR_PCICSRIOBASE     = 0;
-		*CSR_PCISDRAMBASE     = __virt_to_bus(PAGE_OFFSET);
+	*CSR_PCISDRAMBASE     = BUS_OFFSET;
 	*CSR_PCIROMBASE       = 0;
 	*CSR_PCICMD = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |
 		      PCI_COMMAND_INVALIDATE | PCICMD_ERROR_BITS;
-	} else if (footbridge_cfn_mode() != 0) {
-		/*
-		 * If we are not compiled to accept "add-in" mode, then
-		 * we are using a constant virt_to_bus translation which
-		 * can not hope to cater for the way the host BIOS  has
-		 * set up the machine.
-		 */
-		panic("PCI: this kernel is compiled for central "
-			"function mode only");
-	}
 }
 
 void __init dc21285_postinit(void)

arch/arm/kernel/dma-isa.c → arch/arm/mach-footbridge/dma-isa.c

 // SPDX-License-Identifier: GPL-2.0-only
 /*
- *  linux/arch/arm/kernel/dma-isa.c
- *
  *  Copyright (C) 1999-2000 Russell King
  *
  *  ISA DMA primitives
@@ -13,6 +11,7 @@
  *   arch/arm/kernel/dma-ebsa285.c
  *   Copyright (C) 1998 Phil Blundell
  */
+#include <linux/dma-map-ops.h>
 #include <linux/ioport.h>
 #include <linux/init.h>
 #include <linux/dma-mapping.h>
@@ -20,6 +19,7 @@
 
 #include <asm/dma.h>
 #include <asm/mach/dma.h>
+#include <asm/hardware/dec21285.h>
 
 #define ISA_DMA_MASK		0
 #define ISA_DMA_MODE		1
@@ -157,7 +157,7 @@ static dma_t isa_dma[8];
 /*
  * ISA DMA always starts at channel 0
  */
-void __init isa_init_dma(void)
+static int __init isa_dma_init(void)
 {
 	/*
 	 * Try to autodetect presence of an ISA DMA controller.
@@ -222,4 +222,9 @@ void __init isa_init_dma(void)
 
 		request_dma(DMA_ISA_CASCADE, "cascade");
 	}
+
+	dma_direct_set_offset(&isa_dma_dev, PHYS_OFFSET, BUS_OFFSET, SZ_256M);
+
+	return 0;
 }
+core_initcall(isa_dma_init);

arch/arm/mach-footbridge/dma.c

-// SPDX-License-Identifier: GPL-2.0
-/*
- *  linux/arch/arm/kernel/dma-ebsa285.c
- *
- *  Copyright (C) 1998 Phil Blundell
- *
- * DMA functions specific to EBSA-285/CATS architectures
- *
- *  Changelog:
- *   09-Nov-1998 RMK	Split out ISA DMA functions to dma-isa.c
- *   17-Mar-1999 RMK	Allow any EBSA285-like architecture to have
- *			ISA DMA controllers.
- */
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/spinlock.h>
-#include <linux/scatterlist.h>
-
-#include <asm/dma.h>
-
-#include <asm/mach/dma.h>
-#include <asm/hardware/dec21285.h>
-
-#if 0
-static int fb_dma_request(unsigned int chan, dma_t *dma)
-{
-	return -EINVAL;
-}
-
-static void fb_dma_enable(unsigned int chan, dma_t *dma)
-{
-}
-
-static void fb_dma_disable(unsigned int chan, dma_t *dma)
-{
-}
-
-static struct dma_ops fb_dma_ops = {
-	.type		= "fb",
-	.request	= fb_dma_request,
-	.enable		= fb_dma_enable,
-	.disable	= fb_dma_disable,
-};
-#endif
-
-static int __init fb_dma_init(void)
-{
-#if 0
-	dma[_DC21285_DMA(0)].d_ops = &fb_dma_ops;
-	dma[_DC21285_DMA(1)].d_ops = &fb_dma_ops;
-#endif
-#ifdef CONFIG_ISA_DMA
-	if (footbridge_cfn_mode())
-		isa_init_dma();
-#endif
-	return 0;
-}
-core_initcall(fb_dma_init);

arch/arm/mach-footbridge/include/mach/dma-direct.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef MACH_FOOTBRIDGE_DMA_DIRECT_H
-#define MACH_FOOTBRIDGE_DMA_DIRECT_H 1
-
-dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr);
-phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr);
-
-#endif /* MACH_FOOTBRIDGE_DMA_DIRECT_H */

arch/arm/mach-footbridge/include/mach/isa-dma.h

@@ -10,17 +10,9 @@
 #ifndef __ASM_ARCH_DMA_H
 #define __ASM_ARCH_DMA_H
 
-/*
- * The 21285 has two internal DMA channels; we call these 8 and 9.
- * On CATS hardware we have an additional eight ISA dma channels
- * numbered 0..7.
- */
-#define _ISA_DMA(x)		(0+(x))
-#define _DC21285_DMA(x)		(8+(x))
-
-#define MAX_DMA_CHANNELS	10
+#define MAX_DMA_CHANNELS	8
 
-#define DMA_FLOPPY		_ISA_DMA(2)
-#define DMA_ISA_CASCADE		_ISA_DMA(4)
+#define DMA_FLOPPY		(2)
+#define DMA_ISA_CASCADE		(4)
 
 #endif /* _ASM_ARCH_DMA_H */

arch/arm/mach-footbridge/include/mach/memory.h

@@ -16,37 +16,6 @@
 #ifndef __ASM_ARCH_MEMORY_H
 #define __ASM_ARCH_MEMORY_H
 
-
-#if defined(CONFIG_FOOTBRIDGE_ADDIN)
-/*
- * If we may be using add-in footbridge mode, then we must
- * use the out-of-line translation that makes use of the
- * PCI BAR
- */
-#ifndef __ASSEMBLY__
-extern unsigned long __virt_to_bus(unsigned long);
-extern unsigned long __bus_to_virt(unsigned long);
-#endif
-#define __virt_to_bus	__virt_to_bus
-#define __bus_to_virt	__bus_to_virt
-
-#elif defined(CONFIG_FOOTBRIDGE_HOST)
-
-/*
- * The footbridge is programmed to expose the system RAM at 0xe0000000.
- * The requirement is that the RAM isn't placed at bus address 0, which
- * would clash with VGA cards.
- */
-#define BUS_OFFSET		0xe0000000
-#define __virt_to_bus(x)	((x) + (BUS_OFFSET - PAGE_OFFSET))
-#define __bus_to_virt(x)	((x) - (BUS_OFFSET - PAGE_OFFSET))
-
-#else
-
-#error "Undefined footbridge mode"
-
-#endif
-
 /*
  * Cache flushing area.
  */

arch/arm/mach-footbridge/isa.c

@@ -79,16 +79,12 @@ static int __init footbridge_isa_init(void)
 {
 	int err = 0;
 
-	if (!footbridge_cfn_mode())
-		return 0;
-
 	/* Personal server doesn't have RTC */
-	if (!machine_is_personal_server()) {
 	isa_rtc_init();
 	err = platform_device_register(&rtc_device);
 	if (err)
 		printk(KERN_ERR "Unable to register RTC device: %d\n", err);
-	}
+
 	err = platform_device_register(&serial_device);
 	if (err)
 		printk(KERN_ERR "Unable to register serial device: %d\n", err);

arch/arm/mach-imx/Kconfig

 # SPDX-License-Identifier: GPL-2.0-only
 menuconfig ARCH_MXC
 	bool "Freescale i.MX family"
-	depends on (ARCH_MULTI_V4_V5 && CPU_LITTLE_ENDIAN) || \
+	depends on ((ARCH_MULTI_V4T || ARCH_MULTI_V5) && CPU_LITTLE_ENDIAN) || \
 		ARCH_MULTI_V6_V7 || ARM_SINGLE_ARMV7M
 	select CLKSRC_IMX_GPT
 	select GENERIC_IRQ_CHIP

arch/arm/mach-iop32x/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-   zreladdr-y	+= 0xa0008000
-params_phys-y	:= 0xa0000100
-initrd_phys-y	:= 0xa0800000

arch/arm/mach-lpc18xx/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-# Empty file waiting for deletion once Makefile.boot isn't needed any more.
-# Patch waits for application at
-# http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7889/1 .

arch/arm/mach-lpc32xx/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-   zreladdr-y	+= 0x80008000
-params_phys-y	:= 0x80000100
-initrd_phys-y	:= 0x82000000

arch/arm/mach-mv78xx0/Makefile

 # SPDX-License-Identifier: GPL-2.0
-ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/plat-orion/include
+ccflags-y := -I$(srctree)/arch/arm/plat-orion/include
 
 obj-y				+= common.o mpp.o irq.o pcie.o
 obj-$(CONFIG_MACH_DB78X00_BP)	+= db78x00-bp-setup.o

arch/arm/mach-mvebu/Makefile

 # SPDX-License-Identifier: GPL-2.0
-ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/plat-orion/include
+ccflags-y := -I$(srctree)/arch/arm/plat-orion/include
 
 AFLAGS_coherency_ll.o		:= -Wa,-march=armv7-a
 CFLAGS_pmsu.o			:= -march=armv7-a

arch/arm/mach-nspire/Kconfig

 # SPDX-License-Identifier: GPL-2.0-only
 config ARCH_NSPIRE
 	bool "TI-NSPIRE based"
-	depends on ARCH_MULTI_V4_V5
+	depends on ARCH_MULTI_V4T
 	depends on CPU_LITTLE_ENDIAN
 	select CPU_ARM926T
 	select GENERIC_IRQ_CHIP

arch/arm/mach-omap1/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-   zreladdr-y		+= 0x10008000
-params_phys-y		:= 0x10000100
-initrd_phys-y		:= 0x10800000

arch/arm/mach-orion5x/Makefile

 # SPDX-License-Identifier: GPL-2.0
-ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/arch/arm/plat-orion/include
+ccflags-y := -I$(srctree)/arch/arm/plat-orion/include
 
 obj-y				+= common.o pci.o irq.o mpp.o
 obj-$(CONFIG_MACH_DB88F5281)	+= db88f5281-setup.o

arch/arm/mach-rpc/Kconfig

+config ARCH_RPC
+	bool "RiscPC"
+	depends on ARCH_MULTI_V4 && !(ARCH_MULTI_V4T || ARCH_MULTI_V5)
+	depends on !(ARCH_FOOTBRIDGE || ARCH_SA1100 || ARCH_MOXART || ARCH_GEMINI)
+	depends on !CC_IS_CLANG && GCC_VERSION < 90100 && GCC_VERSION >= 60000
+	depends on CPU_LITTLE_ENDIAN
+	depends on ATAGS
+	depends on MMU
+	select ARCH_ACORN
+	select ARCH_MAY_HAVE_PC_FDC
+	select CPU_SA110
+	select FIQ
+	select HAVE_PATA_PLATFORM
+	select ISA_DMA_API
+	select LEGACY_TIMER_TICK
+	select NEED_MACH_IO_H
+	select NEED_MACH_MEMORY_H
+	select NO_IOPORT_MAP
+	help
+	  On the Acorn Risc-PC, Linux can support the internal IDE disk and
+	  CD-ROM interface, serial and parallel port, and the floppy drive.

arch/arm/mach-rpc/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-   zreladdr-y	+= 0x10008000
-params_phys-y	:= 0x10000100
-initrd_phys-y	:= 0x18000000
-

arch/arm/mach-s3c/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0
-
-ifeq ($(CONFIG_PM_H1940),y)
-	zreladdr-y	+= 0x30108000
-	params_phys-y	:= 0x30100100
-else
-	zreladdr-y	+= 0x30008000
-	params_phys-y	:= 0x30000100
-endif

arch/arm/mach-s3c/devs.h

@@ -33,8 +33,6 @@ extern struct platform_device s3c64xx_device_onenand1;
 extern struct platform_device s3c64xx_device_pcm0;
 extern struct platform_device s3c64xx_device_pcm1;
 extern struct platform_device s3c64xx_device_spi0;
-extern struct platform_device s3c64xx_device_spi1;
-extern struct platform_device s3c64xx_device_spi2;
 
 extern struct platform_device s3c_device_adc;
 extern struct platform_device s3c_device_cfcon;

arch/arm/mach-sa1100/Kconfig

 # SPDX-License-Identifier: GPL-2.0-only
-if ARCH_SA1100
+menuconfig ARCH_SA1100
+	bool "SA11x0 Implementations"
+	depends on ARCH_MULTI_V4 && !(ARCH_MULTI_V4T || ARCH_MULTI_V5)
+	depends on !(ARCH_MOXART || ARCH_GEMINI)
+	depends on ATAGS
+	depends on CPU_LITTLE_ENDIAN
+	depends on MMU
+	select ARCH_NO_SG_CHAIN
+	select ARCH_MTD_XIP
+	select CLKSRC_MMIO
+	select CLKSRC_PXA
+	select CPU_FREQ
+	select CPU_SA1100
+	select GPIOLIB
+	select IRQ_DOMAIN
+	select ISA
+	select NEED_MACH_MEMORY_H
+	help
+	  Support for StrongARM 11x0 based boards.
 
-menu "SA11x0 Implementations"
+if ARCH_SA1100
 
 config SA1100_ASSABET
 	bool "Assabet"
@@ -179,7 +197,4 @@ config SA1100_SSP
 	  This isn't for audio support, but for attached sensors and
 	  other devices, eg for BadgePAD 4 sensor support.
 
-endmenu
-
 endif
-

arch/arm/mach-sa1100/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-ifeq ($(CONFIG_SA1111),y)
-   zreladdr-y	+= 0xc0208000
-else
-   zreladdr-y	+= 0xc0008000
-endif
-params_phys-y	:= 0xc0000100
-initrd_phys-y	:= 0xc0800000
-

arch/arm/mach-shmobile/Kconfig

@@ -6,5 +6,4 @@ menuconfig ARCH_RENESAS
 	select GPIOLIB
 	select NO_IOPORT_MAP
 	select PINCTRL
-	select SOC_BUS
 	select ZONE_DMA if ARM_LPAE

arch/arm/mach-stm32/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-# Empty file waiting for deletion once Makefile.boot isn't needed any more.
-# Patch waits for application at
-# https://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7889/1 .

arch/arm/mach-versatile/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-# Empty file waiting for deletion once Makefile.boot isn't needed any more.
-# Patch waits for application at
-# http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7889/1 .

arch/arm/mach-vt8500/Makefile.boot

-# SPDX-License-Identifier: GPL-2.0-only
-   zreladdr-y	+= 0x00008000
-params_phys-y	:= 0x00000100
-initrd_phys-y	:= 0x01000000

arch/arm/plat-orion/Makefile

@@ -2,7 +2,7 @@
 #
 # Makefile for the linux kernel.
 #
-ccflags-$(CONFIG_ARCH_MULTIPLATFORM) := -I$(srctree)/$(src)/include
+ccflags-y := -I$(srctree)/$(src)/include
 
 orion-gpio-$(CONFIG_GPIOLIB)      += gpio.o
 obj-$(CONFIG_PLAT_ORION_LEGACY)   += irq.o pcie.o time.o common.o mpp.o

arch/arm64/Kconfig.platforms

@@ -33,6 +33,11 @@ config ARCH_APPLE
 	  This enables support for Apple's in-house ARM SoC family, starting
 	  with the Apple M1.
 
+menuconfig ARCH_BCM
+	bool "Broadcom SoC Support"
+
+if ARCH_BCM
+
 config ARCH_BCM2835
 	bool "Broadcom BCM2835 family"
 	select TIMER_OF
@@ -65,6 +70,16 @@ config ARCH_BCMBCA
 	  This enables support for Broadcom BCA ARM-based broadband chipsets,
 	  including the DSL, PON and Wireless family of chips.
 
+config ARCH_BRCMSTB
+	bool "Broadcom Set-Top-Box SoCs"
+	select ARCH_HAS_RESET_CONTROLLER
+	select GENERIC_IRQ_CHIP
+	select PINCTRL
+	help
+	  This enables support for Broadcom's ARMv8 Set Top Box SoCs
+
+endif
+
 config ARCH_BERLIN
 	bool "Marvell Berlin SoC Family"
 	select DW_APB_ICTL
@@ -79,14 +94,6 @@ config ARCH_BITMAIN
 	help
 	  This enables support for the Bitmain SoC Family.
 
-config ARCH_BRCMSTB
-	bool "Broadcom Set-Top-Box SoCs"
-	select ARCH_HAS_RESET_CONTROLLER
-	select GENERIC_IRQ_CHIP
-	select PINCTRL
-	help
-	  This enables support for Broadcom's ARMv8 Set Top Box SoCs
-
 config ARCH_EXYNOS
 	bool "ARMv8 based Samsung Exynos SoC family"
 	select COMMON_CLK_SAMSUNG
@@ -128,12 +135,6 @@ config ARCH_K3
 	  This enables support for Texas Instruments' K3 multicore SoC
 	  architecture.
 
-config ARCH_LAYERSCAPE
-	bool "ARMv8 based Freescale Layerscape SoC family"
-	select EDAC_SUPPORT
-	help
-	  This enables support for the Freescale Layerscape SoC family.
-
 config ARCH_LG1K
 	bool "LG Electronics LG1K SoC Family"
 	help
@@ -192,6 +193,17 @@ config ARCH_MVEBU
 	   - Armada 8K SoC Family
 	   - 98DX2530 SoC Family
 
+menuconfig ARCH_NXP
+	bool "NXP SoC support"
+
+if ARCH_NXP
+
+config ARCH_LAYERSCAPE
+	bool "ARMv8 based Freescale Layerscape SoC family"
+	select EDAC_SUPPORT
+	help
+	  This enables support for the Freescale Layerscape SoC family.
+
 config ARCH_MXC
 	bool "ARMv8 based NXP i.MX SoC family"
 	select ARM64_ERRATUM_843419
@@ -206,6 +218,13 @@ config ARCH_MXC
 	  This enables support for the ARMv8 based SoCs in the
 	  NXP i.MX family.
 
+config ARCH_S32
+	bool "NXP S32 SoC Family"
+	help
+	  This enables support for the NXP S32 family of processors.
+
+endif
+
 config ARCH_NPCM
 	bool "Nuvoton NPCM Architecture"
 	select PINCTRL
@@ -235,7 +254,6 @@ config ARCH_RENESAS
 	bool "Renesas SoC Platforms"
 	select GPIOLIB
 	select PINCTRL
-	select SOC_BUS
 	help
 	  This enables support for the ARMv8 based Renesas SoCs.
 
@@ -249,11 +267,6 @@ config ARCH_ROCKCHIP
 	  This enables support for the ARMv8 based Rockchip chipsets,
 	  like the RK3368.
 
-config ARCH_S32
-	bool "NXP S32 SoC Family"
-	help
-	  This enables support for the NXP S32 family of processors.
-
 config ARCH_SEATTLE
 	bool "AMD Seattle SoC Family"
 	help

drivers/soc/pxa/ssp.c

@@ -180,11 +180,7 @@ static int pxa_ssp_probe(struct platform_device *pdev)
 
 static int pxa_ssp_remove(struct platform_device *pdev)
 {
-	struct ssp_device *ssp;
-
-	ssp = platform_get_drvdata(pdev);
-	if (ssp == NULL)
-		return -ENODEV;
+	struct ssp_device *ssp = platform_get_drvdata(pdev);
 
 	mutex_lock(&ssp_lock);
 	list_del(&ssp->node);

drivers/tty/serial/21285.c

@@ -461,9 +461,6 @@ static int __init serial21285_console_setup(struct console *co, char *options)
 	int parity = 'n';
 	int flow = 'n';
 
-	if (machine_is_personal_server())
-		baud = 57600;
-
 	/*
 	 * Check whether an invalid uart number has been specified, and
 	 * if so, search for the first available port that does have