ARM: bcm2835: convert to multi-platform

This allows BCM2835 be included in a kernel build that supports multiple
SoCs at once, which is useful for distro kernels.

This change:
* Moves bcm2835's debug-macro.S into ARM's include/debug/, and hooks it
  into the relevant menu.
* Moves bcm2835's Kconfig into its own directory, as seems typical for
  multi-platform conversions.
* Removes bcm2835_soc.h, and moves the content to the files where it was
  used; just one usage per define.
* Deletes some headers and Makefile.boot that aren't needed now that we
  support multi-platform.

Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/Kconfig

@@ -362,26 +362,6 @@ config ARCH_AT91
 	  This enables support for systems based on Atmel
 	  AT91RM9200 and AT91SAM9* processors.
 
-config ARCH_BCM2835
-	bool "Broadcom BCM2835 family"
-	select ARCH_REQUIRE_GPIOLIB
-	select ARM_AMBA
-	select ARM_ERRATA_411920
-	select ARM_TIMER_SP804
-	select CLKDEV_LOOKUP
-	select CLKSRC_OF
-	select COMMON_CLK
-	select CPU_V6
-	select GENERIC_CLOCKEVENTS
-	select MULTI_IRQ_HANDLER
-	select PINCTRL
-	select PINCTRL_BCM2835
-	select SPARSE_IRQ
-	select USE_OF
-	help
-	  This enables support for the Broadcom BCM2835 SoC. This SoC is
-	  use in the Raspberry Pi, and Roku 2 devices.
-
 config ARCH_CNS3XXX
 	bool "Cavium Networks CNS3XXX family"
 	select ARM_GIC
@@ -1037,6 +1017,8 @@ source "arch/arm/mach-at91/Kconfig"
 
 source "arch/arm/mach-bcm/Kconfig"
 
+source "arch/arm/mach-bcm2835/Kconfig"
+
 source "arch/arm/mach-clps711x/Kconfig"
 
 source "arch/arm/mach-cns3xxx/Kconfig"

arch/arm/Kconfig.debug

@@ -89,6 +89,10 @@ choice
 		bool "Kernel low-level debugging on 9263 and 9g45"
 		depends on HAVE_AT91_DBGU1
 
+	config DEBUG_BCM2835
+		bool "Kernel low-level debugging on BCM2835 PL011 UART"
+		depends on ARCH_BCM2835
+
 	config DEBUG_CLPS711X_UART1
 		bool "Kernel low-level debugging messages via UART1"
 		depends on ARCH_CLPS711X
@@ -579,6 +583,7 @@ endchoice
 
 config DEBUG_LL_INCLUDE
 	string
+	default "debug/bcm2835.S" if DEBUG_BCM2835
 	default "debug/icedcc.S" if DEBUG_ICEDCC
 	default "debug/imx.S" if DEBUG_IMX1_UART || \
 				 DEBUG_IMX25_UART || \

arch/arm/configs/bcm2835_defconfig

@@ -29,6 +29,8 @@ CONFIG_EMBEDDED=y
 CONFIG_PROFILING=y
 CONFIG_OPROFILE=y
 CONFIG_JUMP_LABEL=y
+CONFIG_ARCH_MULTI_V6=y
+# CONFIG_ARCH_MULTI_V7 is not set
 CONFIG_ARCH_BCM2835=y
 CONFIG_PREEMPT_VOLUNTARY=y
 CONFIG_AEABI=y

arch/arm/mach-bcm2835/include/mach/debug-macro.S → arch/arm/include/debug/bcm2835.S

@@ -11,7 +11,8 @@
  *
  */
 
-#include <mach/bcm2835_soc.h>
+#define BCM2835_DEBUG_PHYS 0x20201000
+#define BCM2835_DEBUG_VIRT 0xf0201000
 
 	.macro	addruart, rp, rv, tmp
 	ldr	\rp, =BCM2835_DEBUG_PHYS

arch/arm/mach-bcm2835/Kconfig

@@ -0,0 +1,15 @@
+config ARCH_BCM2835
+	bool "Broadcom BCM2835 family" if ARCH_MULTI_V6
+	select ARCH_REQUIRE_GPIOLIB
+	select ARM_AMBA
+	select ARM_ERRATA_411920
+	select ARM_TIMER_SP804
+	select CLKDEV_LOOKUP
+	select CLKSRC_OF
+	select CPU_V6
+	select GENERIC_CLOCKEVENTS
+	select PINCTRL
+	select PINCTRL_BCM2835
+	help
+	  This enables support for the Broadcom BCM2835 SoC. This SoC is
+	  use in the Raspberry Pi, and Roku 2 devices.

arch/arm/mach-bcm2835/bcm2835.c

@@ -23,8 +23,6 @@
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 
-#include <mach/bcm2835_soc.h>
-
 #define PM_RSTC				0x1c
 #define PM_RSTS				0x20
 #define PM_WDOG				0x24
@@ -34,6 +32,10 @@
 #define PM_RSTC_WRCFG_FULL_RESET	0x00000020
 #define PM_RSTS_HADWRH_SET		0x00000040
 
+#define BCM2835_PERIPH_PHYS	0x20000000
+#define BCM2835_PERIPH_VIRT	0xf0000000
+#define BCM2835_PERIPH_SIZE	SZ_16M
+
 static void __iomem *wdt_regs;
 
 /*