Merge tag 'cleanup-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC cleanups from Arnd Bergmann:
 "These cleanup patches are mainly move stuff around and should all be
  harmless.  They are mainly split out so that other branches can be
  based on top to avoid conflicts.

  Notable changes are:

   - We finally remove all mach/timex.h, after CLOCK_TICK_RATE is no
     longer used (Uwe Kleine-König)
   - The Qualcomm MSM platform is split out into legacy mach-msm and
     new-style mach-qcom, to allow easier maintainance of the new
     hardware support without regressions (Kumar Gala)
   - A rework of some of the Kconfig logic to simplify multiplatform
     support (Rob Herring)
   - Samsung Exynos gets closer to supporting multiplatform (Sachin
     Kamat and others)
   - mach-bcm3528 gets merged into mach-bcm (Stephen Warren)
   - at91 gains some common clock framework support (Alexandre Belloni,
     Jean-Jacques Hiblot and other French people)"

* tag 'cleanup-3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (89 commits)
  ARM: hisi: select HAVE_ARM_SCU only for SMP
  ARM: efm32: allow uncompress debug output
  ARM: prima2: build reset code standalone
  ARM: at91: add PWM clock
  ARM: at91: move sam9261 SoC to common clk
  ARM: at91: prepare common clk transition for sam9261 SoC
  ARM: at91: updated the at91_dt_defconfig with support for the ADS7846
  ARM: at91: dt: sam9261: Device Tree support for the at91sam9261ek
  ARM: at91: dt: defconfig: Added the sam9261 to the list of DT-enabled SOCs
  ARM: at91: dt: Add at91sam9261 dt SoC support
  ARM: at91: switch sam9rl to common clock framework
  ARM: at91/dt: define main clk frequency of at91sam9rlek
  ARM: at91/dt: define at91sam9rl clocks
  ARM: at91: prepare common clk transition for sam9rl SoCs
  ARM: at91: prepare sam9 dt boards transition to common clk
  ARM: at91: dt: sam9rl: Device Tree for the at91sam9rlek
  ARM: at91/defconfig: Add the sam9rl to the list of DT-enabled SOCs
  ARM: at91: Add at91sam9rl DT SoC support
  ARM: at91: prepare at91sam9rl DT transition
  ARM: at91/defconfig: refresh at91sam9260_9g20_defconfig
  ...

6 files changed, 220 insertions, 94 deletions

diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index b1aa6a9b3bd1..396d05c8b570 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -16,12 +16,7 @@ config ARCH_BCM_MOBILE
 	select ARM_ERRATA_754322
 	select ARM_ERRATA_764369 if SMP
 	select ARM_GIC
-	select CPU_V7
-	select CLKSRC_OF
-	select GENERIC_CLOCKEVENTS
-	select GENERIC_TIME
 	select GPIO_BCM_KONA
-	select SPARSE_IRQ
 	select TICK_ONESHOT
 	select CACHE_L2X0
 	select HAVE_ARM_ARCH_TIMER
@@ -32,6 +27,22 @@ config ARCH_BCM_MOBILE
 	  BCM11130, BCM11140, BCM11351, BCM28145 and
 	  BCM28155 variants.
 
+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
+	  used in the Raspberry Pi and Roku 2 devices.
+
 endmenu
 
 endif
diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile
index c2ccd5a0f772..0ad293882079 100644
--- a/arch/arm/mach-bcm/Makefile
+++ b/arch/arm/mach-bcm/Makefile
@@ -11,5 +11,7 @@
 # GNU General Public License for more details.
 
 obj-$(CONFIG_ARCH_BCM_MOBILE)	:= board_bcm281xx.o bcm_kona_smc.o bcm_kona_smc_asm.o kona.o
+obj-$(CONFIG_ARCH_BCM2835)	+= board_bcm2835.o
+
 plus_sec := $(call as-instr,.arch_extension sec,+sec)
 AFLAGS_bcm_kona_smc_asm.o	:=-Wa,-march=armv7-a$(plus_sec)
diff --git a/arch/arm/mach-bcm/board_bcm281xx.c b/arch/arm/mach-bcm/board_bcm281xx.c
index cb3dc364405c..6be54c10f8cb 100644
--- a/arch/arm/mach-bcm/board_bcm281xx.c
+++ b/arch/arm/mach-bcm/board_bcm281xx.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012-2013 Broadcom Corporation
+ * Copyright (C) 2012-2014 Broadcom Corporation
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -11,64 +11,65 @@
  * GNU General Public License for more details.
  */
 
-#include <linux/of_platform.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/platform_device.h>
 #include <linux/clocksource.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
 
 #include <asm/mach/arch.h>
-#include <asm/mach/time.h>
-#include <asm/hardware/cache-l2x0.h>
 
-#include "bcm_kona_smc.h"
 #include "kona.h"
 
-static int __init kona_l2_cache_init(void)
+#define SECWDOG_OFFSET			0x00000000
+#define SECWDOG_RESERVED_MASK		0xe2000000
+#define SECWDOG_WD_LOAD_FLAG_MASK	0x10000000
+#define SECWDOG_EN_MASK			0x08000000
+#define SECWDOG_SRSTEN_MASK		0x04000000
+#define SECWDOG_CLKS_SHIFT		20
+#define SECWDOG_COUNT_SHIFT		0
+
+static void bcm281xx_restart(enum reboot_mode mode, const char *cmd)
 {
-	if (!IS_ENABLED(CONFIG_CACHE_L2X0))
-		return 0;
+	uint32_t val;
+	void __iomem *base;
+	struct device_node *np_wdog;
 
-	if (bcm_kona_smc_init() < 0) {
-		pr_info("Kona secure API not available. Skipping L2 init\n");
-		return 0;
+	np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");
+	if (!np_wdog) {
+		pr_emerg("Couldn't find brcm,kona-wdt\n");
+		return;
+	}
+	base = of_iomap(np_wdog, 0);
+	if (!base) {
+		pr_emerg("Couldn't map brcm,kona-wdt\n");
+		return;
 	}
 
-	bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);
-
-	/*
-	 * The aux_val and aux_mask have no effect since L2 cache is already
-	 * enabled.  Pass 0s for aux_val and 1s for aux_mask for default value.
-	 */
-	return l2x0_of_init(0, ~0);
-}
-
-static void bcm_board_setup_restart(void)
-{
-	struct device_node *np;
+	/* Enable watchdog with short timeout (244us). */
+	val = readl(base + SECWDOG_OFFSET);
+	val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;
+	val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |
+		(0x15 << SECWDOG_CLKS_SHIFT) |
+		(0x8 << SECWDOG_COUNT_SHIFT);
+	writel(val, base + SECWDOG_OFFSET);
 
-	np = of_find_compatible_node(NULL, NULL, "brcm,bcm11351");
-	if (np) {
-		if (of_device_is_available(np))
-			bcm_kona_setup_restart();
-		of_node_put(np);
-	}
-	/* Restart setup for other boards goes here */
+	/* Wait for reset */
+	while (1);
 }
 
-static void __init board_init(void)
+static void __init bcm281xx_init(void)
 {
 	of_platform_populate(NULL, of_default_bus_match_table, NULL,
 		&platform_bus);
-
-	bcm_board_setup_restart();
 	kona_l2_cache_init();
 }
 
-static const char * const bcm11351_dt_compat[] = { "brcm,bcm11351", NULL, };
+static const char * const bcm281xx_dt_compat[] = {
+	"brcm,bcm11351",	/* Have to use the first number upstreamed */
+	NULL,
+};
 
-DT_MACHINE_START(BCM11351_DT, "BCM281xx Broadcom Application Processor")
-	.init_machine = board_init,
-	.restart = bcm_kona_restart,
-	.dt_compat = bcm11351_dt_compat,
+DT_MACHINE_START(BCM281XX_DT, "BCM281xx Broadcom Application Processor")
+	.init_machine = bcm281xx_init,
+	.restart = bcm281xx_restart,
+	.dt_compat = bcm281xx_dt_compat,
 MACHINE_END
diff --git a/arch/arm/mach-bcm/board_bcm2835.c b/arch/arm/mach-bcm/board_bcm2835.c
new file mode 100644
index 000000000000..70f2f3925f0e
--- /dev/null
+++ b/arch/arm/mach-bcm/board_bcm2835.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2010 Broadcom
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/irqchip.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/clk/bcm2835.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+
+#define PM_RSTC				0x1c
+#define PM_RSTS				0x20
+#define PM_WDOG				0x24
+
+#define PM_PASSWORD			0x5a000000
+#define PM_RSTC_WRCFG_MASK		0x00000030
+#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;
+
+/*
+ * The machine restart method can be called from an atomic context so we won't
+ * be able to ioremap the regs then.
+ */
+static void bcm2835_setup_restart(void)
+{
+	struct device_node *np = of_find_compatible_node(NULL, NULL,
+						"brcm,bcm2835-pm-wdt");
+	if (WARN(!np, "unable to setup watchdog restart"))
+		return;
+
+	wdt_regs = of_iomap(np, 0);
+	WARN(!wdt_regs, "failed to remap watchdog regs");
+}
+
+static void bcm2835_restart(enum reboot_mode mode, const char *cmd)
+{
+	u32 val;
+
+	if (!wdt_regs)
+		return;
+
+	/* use a timeout of 10 ticks (~150us) */
+	writel_relaxed(10 | PM_PASSWORD, wdt_regs + PM_WDOG);
+	val = readl_relaxed(wdt_regs + PM_RSTC);
+	val &= ~PM_RSTC_WRCFG_MASK;
+	val |= PM_PASSWORD | PM_RSTC_WRCFG_FULL_RESET;
+	writel_relaxed(val, wdt_regs + PM_RSTC);
+
+	/* No sleeping, possibly atomic. */
+	mdelay(1);
+}
+
+/*
+ * We can't really power off, but if we do the normal reset scheme, and
+ * indicate to bootcode.bin not to reboot, then most of the chip will be
+ * powered off.
+ */
+static void bcm2835_power_off(void)
+{
+	u32 val;
+
+	/*
+	 * We set the watchdog hard reset bit here to distinguish this reset
+	 * from the normal (full) reset. bootcode.bin will not reboot after a
+	 * hard reset.
+	 */
+	val = readl_relaxed(wdt_regs + PM_RSTS);
+	val &= ~PM_RSTC_WRCFG_MASK;
+	val |= PM_PASSWORD | PM_RSTS_HADWRH_SET;
+	writel_relaxed(val, wdt_regs + PM_RSTS);
+
+	/* Continue with normal reset mechanism */
+	bcm2835_restart(REBOOT_HARD, "");
+}
+
+static struct map_desc io_map __initdata = {
+	.virtual = BCM2835_PERIPH_VIRT,
+	.pfn = __phys_to_pfn(BCM2835_PERIPH_PHYS),
+	.length = BCM2835_PERIPH_SIZE,
+	.type = MT_DEVICE
+};
+
+static void __init bcm2835_map_io(void)
+{
+	iotable_init(&io_map, 1);
+}
+
+static void __init bcm2835_init(void)
+{
+	int ret;
+
+	bcm2835_setup_restart();
+	if (wdt_regs)
+		pm_power_off = bcm2835_power_off;
+
+	bcm2835_init_clocks();
+
+	ret = of_platform_populate(NULL, of_default_bus_match_table, NULL,
+				   NULL);
+	if (ret) {
+		pr_err("of_platform_populate failed: %d\n", ret);
+		BUG();
+	}
+}
+
+static const char * const bcm2835_compat[] = {
+	"brcm,bcm2835",
+	NULL
+};
+
+DT_MACHINE_START(BCM2835, "BCM2835")
+	.map_io = bcm2835_map_io,
+	.init_irq = irqchip_init,
+	.init_machine = bcm2835_init,
+	.restart = bcm2835_restart,
+	.dt_compat = bcm2835_compat
+MACHINE_END
diff --git a/arch/arm/mach-bcm/kona.c b/arch/arm/mach-bcm/kona.c
index 6939d9017f63..768bc2837bf5 100644
--- a/arch/arm/mach-bcm/kona.c
+++ b/arch/arm/mach-bcm/kona.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Broadcom Corporation
+ * Copyright (C) 2012-2014 Broadcom Corporation
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -11,55 +11,33 @@
  * GNU General Public License for more details.
  */
 
-#include <linux/of_address.h>
-#include <asm/io.h>
+#include <linux/of_platform.h>
+#include <asm/hardware/cache-l2x0.h>
 
+#include "bcm_kona_smc.h"
 #include "kona.h"
 
-static void __iomem *watchdog_base;
-
-void bcm_kona_setup_restart(void)
+void __init kona_l2_cache_init(void)
 {
-	struct device_node *np_wdog;
+	int ret;
 
-	/*
-	 * The assumption is that whoever calls bcm_kona_setup_restart()
-	 * also needs a Kona Watchdog Timer entry in Device Tree, i.e. we
-	 * report an error if the DT entry is missing.
-	 */
-	np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt");
-	if (!np_wdog) {
-		pr_err("brcm,kona-wdt not found in DT, reboot disabled\n");
+	if (!IS_ENABLED(CONFIG_CACHE_L2X0))
 		return;
-	}
-	watchdog_base = of_iomap(np_wdog, 0);
-	WARN(!watchdog_base, "failed to map watchdog base");
-	of_node_put(np_wdog);
-}
-
-#define SECWDOG_OFFSET			0x00000000
-#define SECWDOG_RESERVED_MASK		0xE2000000
-#define SECWDOG_WD_LOAD_FLAG_MASK	0x10000000
-#define SECWDOG_EN_MASK			0x08000000
-#define SECWDOG_SRSTEN_MASK		0x04000000
-#define SECWDOG_CLKS_SHIFT		20
-#define SECWDOG_LOCK_SHIFT		0
 
-void bcm_kona_restart(enum reboot_mode mode, const char *cmd)
-{
-	uint32_t val;
-
-	if (!watchdog_base)
-		panic("Watchdog not mapped. Reboot failed.\n");
+	ret = bcm_kona_smc_init();
+	if (ret) {
+		pr_info("Secure API not available (%d). Skipping L2 init.\n",
+			ret);
+		return;
+	}
 
-	/* Enable watchdog2 with very short timeout. */
-	val = readl(watchdog_base + SECWDOG_OFFSET);
-	val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK;
-	val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK |
-		(0x8 << SECWDOG_CLKS_SHIFT) |
-		(0x8 << SECWDOG_LOCK_SHIFT);
-	writel(val, watchdog_base + SECWDOG_OFFSET);
+	bcm_kona_smc(SSAPI_ENABLE_L2_CACHE, 0, 0, 0, 0);
 
-	while (1)
-		;
+	/*
+	 * The aux_val and aux_mask have no effect since L2 cache is already
+	 * enabled.  Pass 0s for aux_val and 1s for aux_mask for default value.
+	 */
+	ret = l2x0_of_init(0, ~0);
+	if (ret)
+		pr_err("Couldn't enable L2 cache: %d\n", ret);
 }
diff --git a/arch/arm/mach-bcm/kona.h b/arch/arm/mach-bcm/kona.h
index 291eca3e06ff..3a7a017c29cd 100644
--- a/arch/arm/mach-bcm/kona.h
+++ b/arch/arm/mach-bcm/kona.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2013 Broadcom Corporation
+ * Copyright (C) 2012-2014 Broadcom Corporation
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -11,7 +11,4 @@
  * GNU General Public License for more details.
  */
 
-#include <linux/reboot.h>
-
-void bcm_kona_setup_restart(void);
-void bcm_kona_restart(enum reboot_mode mode, const char *cmd);
+void __init kona_l2_cache_init(void);