Merge tag 'rpi-for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/…

…git/swarren/linux-rpi into next/soc

ARM: add basic BCM2835 SoC and Raspberry Pi board support

The BCM2835 is an ARM SoC from Broadcom. This patch adds very basic
support for this SoC; enough to boot the system into an initrd with
UART console, interrupt controller, timers, and a stub clock driver.

Also provided is a similarly basic device tree for the Raspberry Pi
Model B board.

This series was written by Simon Arlott, Chris Boot, and Dom Cobley
downstream, with reference to a Broadcom tree, and modified for upstream
and submitted by Stephen Warren.

* tag 'rpi-for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-rpi:
  MAINTAINERS: add an entry for the BCM2835 ARM sub-architecture
  ARM: bcm2835: instantiate console UART
  ARM: bcm2835: add stub clock driver
  ARM: bcm2835: add system timer
  ARM: bcm2835: add interrupt controller driver
  ARM: add infra-structure for BCM2835 and Raspberry Pi

Documentation/devicetree/bindings/arm/bcm2835.txt

@@ -0,0 +1,8 @@
+Broadcom BCM2835 device tree bindings
+-------------------------------------------
+
+Boards with the BCM2835 SoC shall have the following properties:
+
+Required root node property:
+
+compatible = "brcm,bcm2835";

Documentation/devicetree/bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt

@@ -0,0 +1,110 @@
+BCM2835 Top-Level ("ARMCTRL") Interrupt Controller
+
+The BCM2835 contains a custom top-level interrupt controller, which supports
+72 interrupt sources using a 2-level register scheme. The interrupt
+controller, or the HW block containing it, is referred to occasionally
+as "armctrl" in the SoC documentation, hence naming of this binding.
+
+Required properties:
+
+- compatible : should be "brcm,bcm2835-armctrl-ic.txt"
+- reg : Specifies base physical address and size of the registers.
+- interrupt-controller : Identifies the node as an interrupt controller
+- #interrupt-cells : Specifies the number of cells needed to encode an
+  interrupt source. The value shall be 2.
+
+  The 1st cell is the interrupt bank; 0 for interrupts in the "IRQ basic
+  pending" register, or 1/2 respectively for interrupts in the "IRQ pending
+  1/2" register.
+
+  The 2nd cell contains the interrupt number within the bank. Valid values
+  are 0..7 for bank 0, and 0..31 for bank 1.
+
+The interrupt sources are as follows:
+
+Bank 0:
+0: ARM_TIMER
+1: ARM_MAILBOX
+2: ARM_DOORBELL_0
+3: ARM_DOORBELL_1
+4: VPU0_HALTED
+5: VPU1_HALTED
+6: ILLEGAL_TYPE0
+7: ILLEGAL_TYPE1
+
+Bank 1:
+0: TIMER0
+1: TIMER1
+2: TIMER2
+3: TIMER3
+4: CODEC0
+5: CODEC1
+6: CODEC2
+7: VC_JPEG
+8: ISP
+9: VC_USB
+10: VC_3D
+11: TRANSPOSER
+12: MULTICORESYNC0
+13: MULTICORESYNC1
+14: MULTICORESYNC2
+15: MULTICORESYNC3
+16: DMA0
+17: DMA1
+18: VC_DMA2
+19: VC_DMA3
+20: DMA4
+21: DMA5
+22: DMA6
+23: DMA7
+24: DMA8
+25: DMA9
+26: DMA10
+27: DMA11
+28: DMA12
+29: AUX
+30: ARM
+31: VPUDMA
+
+Bank 2:
+0: HOSTPORT
+1: VIDEOSCALER
+2: CCP2TX
+3: SDC
+4: DSI0
+5: AVE
+6: CAM0
+7: CAM1
+8: HDMI0
+9: HDMI1
+10: PIXELVALVE1
+11: I2CSPISLV
+12: DSI1
+13: PWA0
+14: PWA1
+15: CPR
+16: SMI
+17: GPIO0
+18: GPIO1
+19: GPIO2
+20: GPIO3
+21: VC_I2C
+22: VC_SPI
+23: VC_I2SPCM
+24: VC_SDIO
+25: VC_UART
+26: SLIMBUS
+27: VEC
+28: CPG
+29: RNG
+30: VC_ARASANSDIO
+31: AVSPMON
+
+Example:
+
+intc: interrupt-controller {
+	compatible = "brcm,bcm2835-armctrl-ic";
+	reg = <0x7e00b200 0x200>;
+	interrupt-controller;
+	#interrupt-cells = <2>;
+};

Documentation/devicetree/bindings/timer/brcm,bcm2835-system-timer.txt

@@ -0,0 +1,22 @@
+BCM2835 System Timer
+
+The System Timer peripheral provides four 32-bit timer channels and a
+single 64-bit free running counter. Each channel has an output compare
+register, which is compared against the 32 least significant bits of the
+free running counter values, and generates an interrupt.
+
+Required properties:
+
+- compatible : should be "brcm,bcm2835-system-timer.txt"
+- reg : Specifies base physical address and size of the registers.
+- interrupts : A list of 4 interrupt sinks; one per timer channel.
+- clock-frequency : The frequency of the clock that drives the counter, in Hz.
+
+Example:
+
+timer {
+	compatible = "brcm,bcm2835-system-timer";
+	reg = <0x7e003000 0x1000>;
+	interrupts = <1 0>, <1 1>, <1 2>, <1 3>;
+	clock-frequency = <1000000>;
+};

Documentation/devicetree/bindings/vendor-prefixes.txt

@@ -10,6 +10,7 @@ apm	Applied Micro Circuits Corporation (APM)
 arm	ARM Ltd.
 atmel	Atmel Corporation
 bosch	Bosch Sensortec GmbH
+brcm	Broadcom Corporation
 cavium	Cavium, Inc.
 chrp	Common Hardware Reference Platform
 cortina	Cortina Systems, Inc.

MAINTAINERS

@@ -1612,6 +1612,16 @@ L:	netdev@vger.kernel.org
 S:	Supported
 F:	drivers/net/ethernet/broadcom/bnx2x/
 
+BROADCOM BCM2835 ARM ARCHICTURE
+M:	Stephen Warren <swarren@wwwdotorg.org>
+L:	linux-rpi-kernel@lists.infradead.org (moderated for non-subscribers)
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/swarren/linux-rpi.git
+S:	Maintained
+F:	arch/arm/mach-bcm2835/
+F:	arch/arm/boot/dts/bcm2835*
+F:	arch/arm/configs/bcm2835_defconfig
+F:	drivers/*/*bcm2835*
+
 BROADCOM TG3 GIGABIT ETHERNET DRIVER
 M:	Matt Carlson <mcarlson@broadcom.com>
 M:	Michael Chan <mchan@broadcom.com>

arch/arm/Kconfig

@@ -350,6 +350,23 @@ config ARCH_AT91
 	  This enables support for systems based on Atmel
 	  AT91RM9200 and AT91SAM9* processors.
 
+config ARCH_BCM2835
+	bool "Broadcom BCM2835 family"
+	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select ARM_AMBA
+	select ARM_ERRATA_411920
+	select ARM_TIMER_SP804
+	select CLKDEV_LOOKUP
+	select COMMON_CLK
+	select CPU_V6
+	select GENERIC_CLOCKEVENTS
+	select MULTI_IRQ_HANDLER
+	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_BCMRING
 	bool "Broadcom BCMRING"
 	depends on MMU

arch/arm/Makefile

@@ -136,6 +136,7 @@ textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
 # Machine directory name.  This list is sorted alphanumerically
 # by CONFIG_* macro name.
 machine-$(CONFIG_ARCH_AT91)		:= at91
+machine-$(CONFIG_ARCH_BCM2835)		:= bcm2835
 machine-$(CONFIG_ARCH_BCMRING)		:= bcmring
 machine-$(CONFIG_ARCH_CLPS711X)		:= clps711x
 machine-$(CONFIG_ARCH_CNS3XXX)		:= cns3xxx

arch/arm/boot/dts/bcm2835-rpi-b.dts

@@ -0,0 +1,12 @@
+/dts-v1/;
+/memreserve/ 0x0c000000 0x04000000;
+/include/ "bcm2835.dtsi"
+
+/ {
+	compatible = "raspberrypi,model-b", "brcm,bcm2835";
+	model = "Raspberry Pi Model B";
+
+	memory {
+		reg = <0 0x10000000>;
+	};
+};

arch/arm/boot/dts/bcm2835.dtsi

@@ -0,0 +1,39 @@
+/include/ "skeleton.dtsi"
+
+/ {
+	compatible = "brcm,bcm2835";
+	model = "BCM2835";
+	interrupt-parent = <&intc>;
+
+	chosen {
+		bootargs = "earlyprintk console=ttyAMA0";
+	};
+
+	soc {
+		compatible = "simple-bus";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x7e000000 0x20000000 0x02000000>;
+
+		timer {
+			compatible = "brcm,bcm2835-system-timer";
+			reg = <0x7e003000 0x1000>;
+			interrupts = <1 0>, <1 1>, <1 2>, <1 3>;
+			clock-frequency = <1000000>;
+		};
+
+		intc: interrupt-controller {
+			compatible = "brcm,bcm2835-armctrl-ic";
+			reg = <0x7e00b200 0x200>;
+			interrupt-controller;
+			#interrupt-cells = <2>;
+		};
+
+		uart@20201000 {
+			compatible = "brcm,bcm2835-pl011", "arm,pl011", "arm,primecell";
+			reg = <0x7e201000 0x1000>;
+			interrupts = <2 25>;
+			clock-frequency = <3000000>;
+		};
+	};
+};

arch/arm/configs/bcm2835_defconfig

@@ -0,0 +1,95 @@
+CONFIG_EXPERIMENTAL=y
+# CONFIG_LOCALVERSION_AUTO is not set
+CONFIG_SYSVIPC=y
+CONFIG_BSD_PROCESS_ACCT=y
+CONFIG_BSD_PROCESS_ACCT_V3=y
+CONFIG_FHANDLE=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_LOG_BUF_SHIFT=18
+CONFIG_CGROUP_FREEZER=y
+CONFIG_CGROUP_DEVICE=y
+CONFIG_CPUSETS=y
+CONFIG_CGROUP_CPUACCT=y
+CONFIG_RESOURCE_COUNTERS=y
+CONFIG_CGROUP_PERF=y
+CONFIG_CFS_BANDWIDTH=y
+CONFIG_RT_GROUP_SCHED=y
+CONFIG_NAMESPACES=y
+CONFIG_SCHED_AUTOGROUP=y
+CONFIG_RELAY=y
+CONFIG_BLK_DEV_INITRD=y
+CONFIG_RD_BZIP2=y
+CONFIG_RD_LZMA=y
+CONFIG_RD_XZ=y
+CONFIG_RD_LZO=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_KALLSYMS_ALL=y
+CONFIG_EMBEDDED=y
+# CONFIG_COMPAT_BRK is not set
+CONFIG_PROFILING=y
+CONFIG_OPROFILE=y
+CONFIG_JUMP_LABEL=y
+# CONFIG_BLOCK is not set
+CONFIG_ARCH_BCM2835=y
+CONFIG_PREEMPT_VOLUNTARY=y
+CONFIG_AEABI=y
+CONFIG_COMPACTION=y
+CONFIG_KSM=y
+CONFIG_DEFAULT_MMAP_MIN_ADDR=65536
+CONFIG_CLEANCACHE=y
+CONFIG_SECCOMP=y
+CONFIG_CC_STACKPROTECTOR=y
+CONFIG_KEXEC=y
+CONFIG_CRASH_DUMP=y
+CONFIG_VFP=y
+# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
+# CONFIG_SUSPEND is not set
+CONFIG_DEVTMPFS=y
+CONFIG_DEVTMPFS_MOUNT=y
+# CONFIG_STANDALONE is not set
+# CONFIG_INPUT_MOUSEDEV is not set
+# CONFIG_INPUT_KEYBOARD is not set
+# CONFIG_INPUT_MOUSE is not set
+# CONFIG_SERIO is not set
+# CONFIG_VT is not set
+# CONFIG_UNIX98_PTYS is not set
+# CONFIG_LEGACY_PTYS is not set
+# CONFIG_DEVKMEM is not set
+CONFIG_SERIAL_AMBA_PL011=y
+CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_TTY_PRINTK=y
+# CONFIG_HW_RANDOM is not set
+# CONFIG_HWMON is not set
+# CONFIG_USB_SUPPORT is not set
+# CONFIG_IOMMU_SUPPORT is not set
+# CONFIG_FILE_LOCKING is not set
+# CONFIG_DNOTIFY is not set
+# CONFIG_INOTIFY_USER is not set
+# CONFIG_PROC_FS is not set
+# CONFIG_SYSFS is not set
+# CONFIG_MISC_FILESYSTEMS is not set
+CONFIG_PRINTK_TIME=y
+# CONFIG_ENABLE_WARN_DEPRECATED is not set
+# CONFIG_ENABLE_MUST_CHECK is not set
+CONFIG_UNUSED_SYMBOLS=y
+CONFIG_LOCKUP_DETECTOR=y
+CONFIG_DEBUG_INFO=y
+CONFIG_DEBUG_MEMORY_INIT=y
+CONFIG_BOOT_PRINTK_DELAY=y
+CONFIG_SCHED_TRACER=y
+CONFIG_STACK_TRACER=y
+CONFIG_FUNCTION_PROFILER=y
+CONFIG_DYNAMIC_DEBUG=y
+CONFIG_KGDB=y
+CONFIG_KGDB_KDB=y
+CONFIG_TEST_KSTRTOX=y
+CONFIG_STRICT_DEVMEM=y
+CONFIG_DEBUG_LL=y
+CONFIG_EARLY_PRINTK=y
+# CONFIG_XZ_DEC_X86 is not set
+# CONFIG_XZ_DEC_POWERPC is not set
+# CONFIG_XZ_DEC_IA64 is not set
+# CONFIG_XZ_DEC_ARM is not set
+# CONFIG_XZ_DEC_ARMTHUMB is not set
+# CONFIG_XZ_DEC_SPARC is not set

arch/arm/mach-bcm2835/Makefile

@@ -0,0 +1 @@
+obj-y += bcm2835.o

arch/arm/mach-bcm2835/Makefile.boot

@@ -0,0 +1,5 @@
+   zreladdr-y := 0x00008000
+params_phys-y := 0x00000100
+initrd_phys-y := 0x00800000
+
+dtb-y += bcm2835-rpi-b.dtb