[PATCH v4 0/8] ARM: brcmstb: Add Broadcom STB SoC support

[PATCH v4 0/8] ARM: brcmstb: Add Broadcom STB SoC support

[Marc Carino]

This patchset contains the board support package for the
Broadcom BCM7445 ARM-based SoC [1]. These changes contain a
minimal set of code needed for a BCM7445-based board to boot
the Linux kernel.

These changes heavily leverage the OF/devicetree framework.

v4:
- make a reboot driver and put it in the drivers folder
- rework DT bindings to leverage 'syscon'
- rework BSP code to use 'syscon' for all register mappings
- misc. tweaks per suggestions from v3

v3:
- rebased to v3.13-rc8
- switched to using 'multi_v7_defconfig'
- eliminated dependence on compile-time peripheral register access
- moved DT node iomap out from 'init_early'
- misc. minor cleanups from mailing-list discussion for v2

v2:
- rebased to v3.13-rc1
- moved implementation to 'mach-bcm' folder
- added CPU init for B15

v1:
- initial submission

[1] http://www.broadcom.com/products/Cable/Cable-Set-Top-Box-Solutions/BCM7445

Marc Carino (8):
  ARM: brcmstb: add infrastructure for ARM-based Broadcom STB SoCs
  power: reset: Add reboot driver for brcmstb
  ARM: brcmstb: add debug UART for earlyprintk support
  ARM: do CPU-specific init for Broadcom Brahma15 cores
  ARM: brcmstb: add CPU binding for Broadcom Brahma15
  ARM: brcmstb: add misc. DT bindings for brcmstb
  ARM: brcmstb: gic: add compatible string for Broadcom Brahma15
  ARM: brcmstb: dts: add a reference DTS for Broadcom 7445

 .../devicetree/bindings/arm/brcm-brcmstb.txt       |   95 ++++++
 Documentation/devicetree/bindings/arm/cpus.txt     |    1 +
 Documentation/devicetree/bindings/arm/gic.txt      |    1 +
 arch/arm/Kconfig.debug                             |   16 +-
 arch/arm/boot/dts/bcm7445.dts                      |  111 +++++++
 arch/arm/configs/multi_v7_defconfig                |    1 +
 arch/arm/mach-bcm/Kconfig                          |   14 +
 arch/arm/mach-bcm/Makefile                         |    4 +
 arch/arm/mach-bcm/brcmstb.c                        |  110 +++++++
 arch/arm/mach-bcm/brcmstb.h                        |   38 +++
 arch/arm/mach-bcm/headsmp-brcmstb.S                |   34 ++
 arch/arm/mach-bcm/hotplug-brcmstb.c                |  334 ++++++++++++++++++++
 arch/arm/mm/proc-v7.S                              |   11 +
 drivers/power/reset/Kconfig                        |   10 +
 drivers/power/reset/Makefile                       |    1 +
 drivers/power/reset/brcmstb-reboot.c               |  120 +++++++
 16 files changed, 900 insertions(+), 1 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/brcm-brcmstb.txt
 create mode 100644 arch/arm/boot/dts/bcm7445.dts
 create mode 100644 arch/arm/mach-bcm/brcmstb.c
 create mode 100644 arch/arm/mach-bcm/brcmstb.h
 create mode 100644 arch/arm/mach-bcm/headsmp-brcmstb.S
 create mode 100644 arch/arm/mach-bcm/hotplug-brcmstb.c
 create mode 100644 drivers/power/reset/brcmstb-reboot.c

[PATCH v4 1/8] ARM: brcmstb: add infrastructure for ARM-based Broadcom STB SoCs

[Marc Carino]

The BCM7xxx series of Broadcom SoCs are used primarily in set-top boxes.

This patch adds machine support for the ARM-based Broadcom SoCs.

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/configs/multi_v7_defconfig |    1 +
 arch/arm/mach-bcm/Kconfig           |   14 ++
 arch/arm/mach-bcm/Makefile          |    4 +
 arch/arm/mach-bcm/brcmstb.c         |  110 ++++++++++++
 arch/arm/mach-bcm/brcmstb.h         |   38 ++++
 arch/arm/mach-bcm/headsmp-brcmstb.S |   34 ++++
 arch/arm/mach-bcm/hotplug-brcmstb.c |  334 +++++++++++++++++++++++++++++++++++
 7 files changed, 535 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/mach-bcm/brcmstb.c
 create mode 100644 arch/arm/mach-bcm/brcmstb.h
 create mode 100644 arch/arm/mach-bcm/headsmp-brcmstb.S
 create mode 100644 arch/arm/mach-bcm/hotplug-brcmstb.c

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index c1df4e9..7028d11 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -7,6 +7,7 @@ CONFIG_MACH_ARMADA_370=y
 CONFIG_MACH_ARMADA_XP=y
 CONFIG_ARCH_BCM=y
 CONFIG_ARCH_BCM_MOBILE=y
+CONFIG_ARCH_BRCMSTB=y
 CONFIG_GPIO_PCA953X=y
 CONFIG_ARCH_HIGHBANK=y
 CONFIG_ARCH_KEYSTONE=y
diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
index 9fe6d88..2c1ae83 100644
--- a/arch/arm/mach-bcm/Kconfig
+++ b/arch/arm/mach-bcm/Kconfig
@@ -31,6 +31,20 @@ config ARCH_BCM_MOBILE
 	  BCM11130, BCM11140, BCM11351, BCM28145 and
 	  BCM28155 variants.
 
+config ARCH_BRCMSTB
+	bool "Broadcom BCM7XXX based boards" if ARCH_MULTI_V7
+	depends on MMU
+	select ARM_GIC
+	select MIGHT_HAVE_PCI
+	select HAVE_SMP
+	select HAVE_ARM_ARCH_TIMER
+	help
+	  Say Y if you intend to run the kernel on a Broadcom ARM-based STB
+	  chipset.
+
+	  This enables support for Broadcom ARM-based set-top box chipsets,
+	  including the 7445 family of chips.
+
 endmenu
 
 endif
diff --git a/arch/arm/mach-bcm/Makefile b/arch/arm/mach-bcm/Makefile
index c2ccd5a..b744a12 100644
--- a/arch/arm/mach-bcm/Makefile
+++ b/arch/arm/mach-bcm/Makefile
@@ -13,3 +13,7 @@
 obj-$(CONFIG_ARCH_BCM_MOBILE)	:= board_bcm281xx.o bcm_kona_smc.o bcm_kona_smc_asm.o kona.o
 plus_sec := $(call as-instr,.arch_extension sec,+sec)
 AFLAGS_bcm_kona_smc_asm.o	:=-Wa,-march=armv7-a$(plus_sec)
+
+obj-$(CONFIG_ARCH_BRCMSTB)	:= brcmstb.o
+obj-$(CONFIG_SMP)		+= headsmp-brcmstb.o
+obj-$(CONFIG_HOTPLUG_CPU)	+= hotplug-brcmstb.o
diff --git a/arch/arm/mach-bcm/brcmstb.c b/arch/arm/mach-bcm/brcmstb.c
new file mode 100644
index 0000000..7a6093d
--- /dev/null
+++ b/arch/arm/mach-bcm/brcmstb.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2013 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
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/console.h>
+#include <linux/clocksource.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/smp.h>
+
+#include <asm/cacheflush.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/time.h>
+
+#include "brcmstb.h"
+
+/***********************************************************************
+ * STB CPU (main application processor)
+ ***********************************************************************/
+
+static const char *brcmstb_match[] __initconst = {
+	"brcm,bcm7445",
+	"brcm,brcmstb",
+	NULL
+};
+
+static void __init brcmstb_init_early(void)
+{
+	add_preferred_console("ttyS", 0, "115200");
+}
+
+/***********************************************************************
+ * SMP boot
+ ***********************************************************************/
+
+#ifdef CONFIG_SMP
+static DEFINE_SPINLOCK(boot_lock);
+
+static void __cpuinit brcmstb_secondary_init(unsigned int cpu)
+{
+	/*
+	 * Synchronise with the boot thread.
+	 */
+	spin_lock(&boot_lock);
+	spin_unlock(&boot_lock);
+}
+
+static int __cpuinit brcmstb_boot_secondary(unsigned int cpu,
+					    struct task_struct *idle)
+{
+	/*
+	 * set synchronisation state between this boot processor
+	 * and the secondary one
+	 */
+	spin_lock(&boot_lock);
+
+	/* Bring up power to the core if necessary */
+	if (brcmstb_cpu_get_power_state(cpu) == 0)
+		brcmstb_cpu_power_on(cpu);
+
+	brcmstb_cpu_boot(cpu);
+
+	/*
+	 * now the secondary core is starting up let it run its
+	 * calibrations, then wait for it to finish
+	 */
+	spin_unlock(&boot_lock);
+
+	return 0;
+}
+
+struct smp_operations brcmstb_smp_ops __initdata = {
+	.smp_prepare_cpus	= brcmstb_cpu_ctrl_setup,
+	.smp_secondary_init	= brcmstb_secondary_init,
+	.smp_boot_secondary	= brcmstb_boot_secondary,
+#ifdef CONFIG_HOTPLUG_CPU
+	.cpu_kill		= brcmstb_cpu_kill,
+	.cpu_die		= brcmstb_cpu_die,
+#endif
+};
+#endif
+
+DT_MACHINE_START(BRCMSTB, "Broadcom STB (Flattened Device Tree)")
+	.dt_compat	= brcmstb_match,
+#ifdef CONFIG_SMP
+	.smp		= smp_ops(brcmstb_smp_ops),
+#endif
+	.init_early	= brcmstb_init_early,
+MACHINE_END
diff --git a/arch/arm/mach-bcm/brcmstb.h b/arch/arm/mach-bcm/brcmstb.h
new file mode 100644
index 0000000..e49bde6
--- /dev/null
+++ b/arch/arm/mach-bcm/brcmstb.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2013 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
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __BRCMSTB_H__
+#define __BRCMSTB_H__
+
+#if !defined(__ASSEMBLY__)
+#include <linux/smp.h>
+#endif
+
+#if !defined(__ASSEMBLY__)
+extern void brcmstb_secondary_startup(void);
+extern void brcmstb_cpu_boot(unsigned int cpu);
+extern void brcmstb_cpu_power_on(unsigned int cpu);
+extern int brcmstb_cpu_get_power_state(unsigned int cpu);
+extern struct smp_operations brcmstb_smp_ops;
+#if defined(CONFIG_HOTPLUG_CPU)
+extern void brcmstb_cpu_die(unsigned int cpu);
+extern int brcmstb_cpu_kill(unsigned int cpu);
+void __init brcmstb_cpu_ctrl_setup(unsigned int max_cpus);
+#else
+static inline void brcmstb_cpu_die(unsigned int cpu) {}
+static inline int brcmstb_cpu_kill(unsigned int cpu) {}
+static inline void __init brcmstb_cpu_ctrl_setup(unsigned int max_cpus) {}
+#endif
+#endif
+
+#endif /* __BRCMSTB_H__ */
diff --git a/arch/arm/mach-bcm/headsmp-brcmstb.S b/arch/arm/mach-bcm/headsmp-brcmstb.S
new file mode 100644
index 0000000..57ec438
--- /dev/null
+++ b/arch/arm/mach-bcm/headsmp-brcmstb.S
@@ -0,0 +1,34 @@
+/*
+ * SMP boot code for secondary CPUs
+ * Based on arch/arm/mach-tegra/headsmp.S
+ *
+ * Copyright (C) 2010 NVIDIA, Inc.
+ * Copyright (C) 2013 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
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <asm/assembler.h>
+#include <linux/linkage.h>
+#include <linux/init.h>
+
+        .section ".text.head", "ax"
+	__CPUINIT
+
+ENTRY(brcmstb_secondary_startup)
+        /*
+         * Ensure CPU is in a sane state by disabling all IRQs and switching
+         * into SVC mode.
+         */
+        setmode	PSR_I_BIT | PSR_F_BIT | SVC_MODE, r0
+
+        bl      v7_invalidate_l1
+        b       secondary_startup
+ENDPROC(brcmstb_secondary_startup)
diff --git a/arch/arm/mach-bcm/hotplug-brcmstb.c b/arch/arm/mach-bcm/hotplug-brcmstb.c
new file mode 100644
index 0000000..ff4a732
--- /dev/null
+++ b/arch/arm/mach-bcm/hotplug-brcmstb.c
@@ -0,0 +1,334 @@
+/*
+ * Broadcom STB CPU hotplug support for ARM
+ *
+ * Copyright (C) 2013 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
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; 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/device.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/printk.h>
+#include <linux/regmap.h>
+#include <linux/smp.h>
+#include <linux/mfd/syscon.h>
+
+#include <asm/cacheflush.h>
+#include <asm/mach-types.h>
+
+#include "brcmstb.h"
+
+enum {
+	ZONE_MAN_CLKEN_MASK		= BIT(0),
+	ZONE_MAN_RESET_CNTL_MASK	= BIT(1),
+	ZONE_MAN_MEM_PWR_MASK		= BIT(4),
+	ZONE_RESERVED_1_MASK		= BIT(5),
+	ZONE_MAN_ISO_CNTL_MASK		= BIT(6),
+	ZONE_MANUAL_CONTROL_MASK	= BIT(7),
+	ZONE_PWR_DN_REQ_MASK		= BIT(9),
+	ZONE_PWR_UP_REQ_MASK		= BIT(10),
+	ZONE_BLK_RST_ASSERT_MASK	= BIT(10),
+	ZONE_PWR_OFF_STATE_MASK		= BIT(26),
+	ZONE_PWR_ON_STATE_MASK		= BIT(26),
+	ZONE_DPG_PWR_STATE_MASK		= BIT(28),
+	ZONE_MEM_PWR_STATE_MASK		= BIT(29),
+	ZONE_RESET_STATE_MASK		= BIT(31),
+};
+
+static void __iomem *cpubiuctrl_block;
+static void __iomem *hif_cont_block;
+static u32 cpu0_pwr_zone_ctrl_reg;
+static u32 cpu_rst_cfg_reg;
+static u32 hif_cont_reg;
+DEFINE_PER_CPU(int, per_cpu_sw_state);
+
+static void __iomem *pwr_ctrl_get_base(unsigned int cpu)
+{
+	void __iomem *base = cpubiuctrl_block + cpu0_pwr_zone_ctrl_reg;
+	base += (cpu * 4);
+	return base;
+}
+
+static u32 pwr_ctrl_rd(unsigned int cpu)
+{
+	void __iomem *base = pwr_ctrl_get_base(cpu);
+	return readl_relaxed(base);
+}
+
+static void pwr_ctrl_wr(unsigned int cpu, u32 val)
+{
+	void __iomem *base = pwr_ctrl_get_base(cpu);
+	writel(val, base);
+}
+
+static void cpu_rst_cfg_set(int cpu, int set)
+{
+	u32 val;
+	val = readl_relaxed(cpubiuctrl_block + cpu_rst_cfg_reg);
+	if (set)
+		val |= BIT(cpu);
+	else
+		val &= ~BIT(cpu);
+	writel_relaxed(val, cpubiuctrl_block + cpu_rst_cfg_reg);
+}
+
+static void cpu_set_boot_addr(int cpu, unsigned long boot_addr)
+{
+	const int reg_ofs = cpu * 8;
+	writel_relaxed(0, hif_cont_block + hif_cont_reg + reg_ofs);
+	writel_relaxed(boot_addr, hif_cont_block + hif_cont_reg + 4 + reg_ofs);
+}
+
+void brcmstb_cpu_boot(unsigned int cpu)
+{
+	pr_info("SMP: Booting CPU%d...\n", cpu);
+
+	/*
+	* set the reset vector to point to the secondary_startup
+	* routine
+	*/
+	cpu_set_boot_addr(cpu, virt_to_phys(brcmstb_secondary_startup));
+
+	flush_cache_all();
+
+	/* unhalt the cpu */
+	cpu_rst_cfg_set(cpu, 0);
+}
+
+void brcmstb_cpu_power_on(unsigned int cpu)
+{
+	/*
+	 * The secondary cores power was cut, so we must go through
+	 * power-on initialization.
+	 */
+	u32 tmp;
+
+	pr_info("SMP: Powering up CPU%d...\n", cpu);
+
+	/* Request zone power up */
+	pwr_ctrl_wr(cpu, ZONE_PWR_UP_REQ_MASK);
+
+	/* Wait for the power up FSM to complete */
+	do {
+		tmp = pwr_ctrl_rd(cpu);
+	} while (!(tmp & ZONE_PWR_ON_STATE_MASK));
+
+	per_cpu(per_cpu_sw_state, cpu) = 1;
+}
+
+int brcmstb_cpu_get_power_state(unsigned int cpu)
+{
+	int tmp = pwr_ctrl_rd(cpu);
+	return (tmp & ZONE_RESET_STATE_MASK) ? 0 : 1;
+}
+
+void __ref brcmstb_cpu_die(unsigned int cpu)
+{
+	/* Derived from misc_bpcm_arm.c */
+
+	/* Clear SCTLR.C bit */
+	__asm__(
+		"mrc	p15, 0, r0, c1, c0, 0\n"
+		"bic	r0, r0, #(1 << 2)\n"
+		"mcr	p15, 0, r0, c1, c0, 0\n"
+		: /* no output */
+		: /* no input */
+		: "r0"	/* clobber r0 */
+	);
+
+	/*
+	 * Instruction barrier to ensure cache is really disabled before
+	 * cleaning/invalidating the caches
+	 */
+	isb();
+
+	flush_cache_all();
+
+	/* Invalidate all instruction caches to PoU (ICIALLU) */
+	/* Data sync. barrier to ensure caches have emptied out */
+	__asm__("mcr	p15, 0, r0, c7, c5, 0\n" : : : "r0");
+	dsb();
+
+	/*
+	 * Clear ACTLR.SMP bit to prevent broadcast TLB messages from reaching
+	 * this core
+	 */
+	__asm__(
+		"mrc	p15, 0, r0, c1, c0, 1\n"
+		"bic	r0, r0, #(1 << 6)\n"
+		"mcr	p15, 0, r0, c1, c0, 1\n"
+		: /* no output */
+		: /* no input */
+		: "r0"	/* clobber r0 */
+	);
+
+	/* Disable all IRQs for this CPU */
+	arch_local_irq_disable();
+
+	per_cpu(per_cpu_sw_state, cpu) = 0;
+
+	/*
+	 * Final full barrier to ensure everything before this instruction has
+	 * quiesced.
+	 */
+	isb();
+	dsb();
+
+	/* Sit and wait to die */
+	wfi();
+
+	/* We should never get here... */
+	nop();
+	panic("Spurious interrupt on CPU %d received!\n", cpu);
+}
+
+int brcmstb_cpu_kill(unsigned int cpu)
+{
+	u32 tmp;
+
+	pr_info("SMP: Powering down CPU%d...\n", cpu);
+
+	while (per_cpu(per_cpu_sw_state, cpu))
+		;
+
+	/* Program zone reset */
+	pwr_ctrl_wr(cpu, ZONE_RESET_STATE_MASK | ZONE_BLK_RST_ASSERT_MASK |
+			      ZONE_PWR_DN_REQ_MASK);
+
+	/* Verify zone reset */
+	tmp = pwr_ctrl_rd(cpu);
+	if (!(tmp & ZONE_RESET_STATE_MASK))
+		pr_err("%s: Zone reset bit for CPU %d not asserted!\n",
+			__func__, cpu);
+
+	/* Wait for power down */
+	do {
+		tmp = pwr_ctrl_rd(cpu);
+	} while (!(tmp & ZONE_PWR_OFF_STATE_MASK));
+
+	/* Settle-time from Broadcom-internal DVT reference code */
+	udelay(7);
+
+	/* Assert reset on the CPU */
+	cpu_rst_cfg_set(cpu, 1);
+
+	return 1;
+}
+
+static int __init setup_hifcpubiuctrl_regs(struct device_node *np)
+{
+	int rc = 0;
+	char *name;
+	int index;
+	struct device_node *syscon_np = NULL;
+
+	name = "syscon-cpu";
+
+	syscon_np = of_parse_phandle(np, name, 0);
+	if (!syscon_np) {
+		pr_err("can't find phandle %s\n", name);
+		rc = -EINVAL;
+		goto cleanup;
+	}
+
+	cpubiuctrl_block = of_iomap(syscon_np, 0);
+	if (!cpubiuctrl_block) {
+		pr_err("iomap failed for cpubiuctrl_block\n");
+		rc = -EINVAL;
+		goto cleanup;
+	}
+
+	index = 1;
+	rc = of_property_read_u32_index(np, name, index,
+					&cpu0_pwr_zone_ctrl_reg);
+	if (rc) {
+		pr_err("failed to read %d from %s property (%d)\n", index, name,
+			rc);
+		rc = -EINVAL;
+		goto cleanup;
+	}
+
+	index = 2;
+	rc = of_property_read_u32_index(np, name, index, &cpu_rst_cfg_reg);
+	if (rc) {
+		pr_err("failed to read %d from %s property (%d)\n", index, name,
+			rc);
+		rc = -EINVAL;
+		goto cleanup;
+	}
+
+cleanup:
+	if (syscon_np)
+		of_node_put(syscon_np);
+
+	return rc;
+}
+
+static int __init setup_hifcont_regs(struct device_node *np)
+{
+	int rc = 0;
+	char *name;
+	struct device_node *syscon_np = NULL;
+
+	name = "syscon-cont";
+
+	syscon_np = of_parse_phandle(np, name, 0);
+	if (!syscon_np) {
+		pr_err("can't find phandle %s\n", name);
+		rc = -EINVAL;
+		goto cleanup;
+	}
+
+	hif_cont_block = of_iomap(syscon_np, 0);
+	if (!hif_cont_block) {
+		pr_err("iomap failed for hif_cont_block\n");
+		rc = -EINVAL;
+		goto cleanup;
+	}
+
+	/* offset is at top of hif_cont_block */
+	hif_cont_reg = 0;
+
+cleanup:
+	if (syscon_np)
+		of_node_put(syscon_np);
+
+	return rc;
+}
+
+void __init brcmstb_cpu_ctrl_setup(unsigned int max_cpus)
+{
+	int rc;
+	struct device_node *np;
+	char *name;
+
+	name = "brcm,brcmstb-smpboot";
+	np = of_find_compatible_node(NULL, NULL, name);
+	if (!np) {
+		pr_err("can't find compatible node %s\n", name);
+		return;
+	}
+
+	rc = setup_hifcpubiuctrl_regs(np);
+	if (rc)
+		return;
+
+	rc = setup_hifcont_regs(np);
+	if (rc)
+		return;
+}
+
-- 
1.7.1

[PATCH v4 2/8] power: reset: Add reboot driver for brcmstb

[Marc Carino]

Add support for reboot functionality on boards with ARM-based
Broadcom STB chipsets.

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
---
 drivers/power/reset/Kconfig          |   10 +++
 drivers/power/reset/Makefile         |    1 +
 drivers/power/reset/brcmstb-reboot.c |  120 ++++++++++++++++++++++++++++++++++
 3 files changed, 131 insertions(+), 0 deletions(-)
 create mode 100644 drivers/power/reset/brcmstb-reboot.c

diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index 9b3ea53..31b468b 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -6,6 +6,16 @@ menuconfig POWER_RESET
 
 	  Say Y here to enable board reset and power off
 
+config POWER_RESET_BRCMSTB
+	bool "Broadcom STB reset driver"
+	depends on POWER_RESET && ARCH_BRCMSTB
+	help
+	  This driver provides restart support for ARM-based Broadcom STB
+	  boards.
+
+	  Say Y here if you have an ARM-based Broadcom STB board and you wish
+	  to have restart support.
+
 config POWER_RESET_GPIO
 	bool "GPIO power-off driver"
 	depends on OF_GPIO && POWER_RESET
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index 3e6ed88..806d056 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -4,3 +4,4 @@ obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o
 obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o
 obj-$(CONFIG_POWER_RESET_VEXPRESS) += vexpress-poweroff.o
 obj-$(CONFIG_POWER_RESET_XGENE) += xgene-reboot.o
+obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o
diff --git a/drivers/power/reset/brcmstb-reboot.c b/drivers/power/reset/brcmstb-reboot.c
new file mode 100644
index 0000000..3f23692
--- /dev/null
+++ b/drivers/power/reset/brcmstb-reboot.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2013 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
+ * published by the Free Software Foundation version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+#include <linux/smp.h>
+#include <linux/mfd/syscon.h>
+
+#include <asm/system_misc.h>
+
+#define RESET_SOURCE_ENABLE_REG 1
+#define SW_MASTER_RESET_REG 2
+
+static struct regmap *regmap;
+static u32 rst_src_en;
+static u32 sw_mstr_rst;
+
+static void brcmstb_reboot(enum reboot_mode mode, const char *cmd)
+{
+	int rc;
+	u32 tmp;
+
+	rc = regmap_write(regmap, rst_src_en, 1);
+	if (rc) {
+		pr_err("failed to write rst_src_en (%d)\n", rc);
+		return;
+	}
+
+	rc = regmap_read(regmap, rst_src_en, &tmp);
+	if (rc) {
+		pr_err("failed to read rst_src_en (%d)\n", rc);
+		return;
+	}
+
+	rc = regmap_write(regmap, sw_mstr_rst, 1);
+	if (rc) {
+		pr_err("failed to write sw_mstr_rst (%d)\n", rc);
+		return;
+	}
+
+	rc = regmap_read(regmap, sw_mstr_rst, &tmp);
+	if (rc) {
+		pr_err("failed to read sw_mstr_rst (%d)\n", rc);
+		return;
+	}
+
+	while (1)
+		;
+}
+
+static int brcmstb_reboot_probe(struct platform_device *pdev)
+{
+	int rc;
+	struct device_node *np = pdev->dev.of_node;
+
+	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
+	if (IS_ERR(regmap)) {
+		pr_err("failed to get syscon phandle\n");
+		return -EINVAL;
+	}
+
+	rc = of_property_read_u32_index(np, "syscon", RESET_SOURCE_ENABLE_REG,
+					&rst_src_en);
+	if (rc) {
+		pr_err("can't get rst_src_en offset (%d)\n", rc);
+		return -EINVAL;
+	}
+
+	rc = of_property_read_u32_index(np, "syscon", SW_MASTER_RESET_REG,
+					&sw_mstr_rst);
+	if (rc) {
+		pr_err("can't get sw_mstr_rst offset (%d)\n", rc);
+		return -EINVAL;
+	}
+
+	arm_pm_restart = brcmstb_reboot;
+
+	return 0;
+}
+
+static const struct of_device_id of_match[] = {
+	{ .compatible = "brcm,brcmstb-reboot", },
+	{},
+};
+
+static struct platform_driver brcmstb_reboot_driver = {
+	.probe = brcmstb_reboot_probe,
+	.driver = {
+		.name = "brcmstb-reboot",
+		.owner = THIS_MODULE,
+		.of_match_table = of_match,
+	},
+};
+
+static int __init brcmstb_reboot_init(void)
+{
+	return platform_driver_probe(&brcmstb_reboot_driver,
+					brcmstb_reboot_probe);
+}
+subsys_initcall(brcmstb_reboot_init);
-- 
1.7.1

[PATCH v4 3/8] ARM: brcmstb: add debug UART for earlyprintk support

[Marc Carino]

Add the UART definitions needed to support earlyprintk on brcmstb machines.

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/Kconfig.debug |   16 +++++++++++++++-
 1 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 5765abf..266c699 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -94,6 +94,17 @@ choice
 		depends on ARCH_BCM2835
 		select DEBUG_UART_PL01X
 
+	config DEBUG_BRCMSTB_UART
+		bool "Use BRCMSTB UART for low-level debug"
+		depends on ARCH_BRCMSTB
+		select DEBUG_UART_8250
+		help
+		  Say Y here if you want the debug print routines to direct
+		  their output to the first serial port on these devices.
+
+		  If you have a Broadcom STB chip and would like early print
+		  messages to appear over the UART, select this option.
+
 	config DEBUG_CLPS711X_UART1
 		bool "Kernel low-level debugging messages via UART1"
 		depends on ARCH_CLPS711X
@@ -988,6 +999,7 @@ config DEBUG_UART_PHYS
 	default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
 	default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
 	default 0x20201000 if DEBUG_BCM2835
+	default 0xf0406b00 if DEBUG_BRCMSTB_UART
 	default 0x4000e400 if DEBUG_LL_UART_EFM32
 	default 0x40090000 if ARCH_LPC32XX
 	default 0x40100000 if DEBUG_PXA_UART1
@@ -1029,6 +1041,7 @@ config DEBUG_UART_VIRT
 	default 0xf0009000 if DEBUG_CNS3XXX
 	default 0xf01fb000 if DEBUG_NOMADIK_UART
 	default 0xf0201000 if DEBUG_BCM2835
+	default 0xfc406b00 if DEBUG_BRCMSTB_UART
 	default 0xf11f1000 if ARCH_VERSATILE
 	default 0xf1600000 if ARCH_INTEGRATOR
 	default 0xf1c28000 if DEBUG_SUNXI_UART0
@@ -1091,7 +1104,8 @@ config DEBUG_UART_8250_WORD
 	default y if DEBUG_PICOXCELL_UART || DEBUG_SOCFPGA_UART || \
 		ARCH_KEYSTONE || \
 		DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
-		DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1
+		DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_DAVINCI_TNETV107X_UART1 || \
+		DEBUG_BRCMSTB_UART
 
 config DEBUG_UART_8250_FLOW_CONTROL
 	bool "Enable flow control for 8250 UART"
-- 
1.7.1

[PATCH v4 4/8] ARM: do CPU-specific init for Broadcom Brahma15 cores

[Marc Carino]

Perform any CPU-specific initialization required on the
Broadcom Brahma-15 core.

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/mm/proc-v7.S |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index bd17819..98ea423 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -193,6 +193,7 @@ __v7_cr7mp_setup:
 	b	1f
 __v7_ca7mp_setup:
 __v7_ca15mp_setup:
+__v7_b15mp_setup:
 	mov	r10, #0
 1:
 #ifdef CONFIG_SMP
@@ -494,6 +495,16 @@ __v7_ca15mp_proc_info:
 	.size	__v7_ca15mp_proc_info, . - __v7_ca15mp_proc_info
 
 	/*
+	 * Broadcom Corporation Brahma-B15 processor.
+	 */
+	.type	__v7_b15mp_proc_info, #object
+__v7_b15mp_proc_info:
+	.long	0x420f00f0
+	.long	0xff0ffff0
+	__v7_proc __v7_b15mp_setup, hwcaps = HWCAP_IDIV
+	.size	__v7_b15mp_proc_info, . - __v7_b15mp_proc_info
+
+	/*
 	 * Qualcomm Inc. Krait processors.
 	 */
 	.type	__krait_proc_info, #object
-- 
1.7.1

[PATCH v4 5/8] ARM: brcmstb: add CPU binding for Broadcom Brahma15

[Marc Carino]

Add the Broadcom Brahma B15 CPU to the DT CPU binding list.

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
---
 Documentation/devicetree/bindings/arm/cpus.txt |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
index 9130435..0cd1e25 100644
--- a/Documentation/devicetree/bindings/arm/cpus.txt
+++ b/Documentation/devicetree/bindings/arm/cpus.txt
@@ -163,6 +163,7 @@ nodes to be present and contain the properties described below.
 			    "arm,cortex-r4"
 			    "arm,cortex-r5"
 			    "arm,cortex-r7"
+			    "brcm,brahma-b15"
 			    "faraday,fa526"
 			    "intel,sa110"
 			    "intel,sa1100"
-- 
1.7.1

[PATCH v4 6/8] ARM: brcmstb: add misc. DT bindings for brcmstb

[Marc Carino]

Document the bindings that the Broadcom STB platform needs
for proper bootup.

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
---
 .../devicetree/bindings/arm/brcm-brcmstb.txt       |   95 ++++++++++++++++++++
 1 files changed, 95 insertions(+), 0 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/brcm-brcmstb.txt

diff --git a/Documentation/devicetree/bindings/arm/brcm-brcmstb.txt b/Documentation/devicetree/bindings/arm/brcm-brcmstb.txt
new file mode 100644
index 0000000..3c436cc
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/brcm-brcmstb.txt
@@ -0,0 +1,95 @@
+ARM Broadcom STB platforms Device Tree Bindings
+-----------------------------------------------
+Boards with Broadcom Brahma15 ARM-based BCMxxxx (generally BCM7xxx variants)
+SoC shall have the following DT organization:
+
+Required root node properties:
+    - compatible: "brcm,bcm<chip_id>", "brcm,brcmstb"
+
+example:
+/ {
+    #address-cells = <2>;
+    #size-cells = <2>;
+    model = "Broadcom STB (bcm7445)";
+    compatible = "brcm,bcm7445", "brcm,brcmstb";
+
+Further, syscon nodes that map platform-specific registers used for general
+system control is required:
+
+    - compatible: "brcm,bcm<chip_id>-sun-top-ctrl", "syscon"
+    - compatible: "brcm,bcm<chip_id>-hif-cpubiuctrl", "syscon"
+    - compatible: "brcm,bcm<chip_id>-hif-continuation", "syscon"
+
+example:
+    rdb {
+        #address-cells = <1>;
+        #size-cells = <1>;
+        compatible = "simple-bus";
+        ranges = <0 0x00 0xf0000000 0x1000000>;
+
+        sun_top_ctrl: syscon@404000 {
+            compatible = "brcm,bcm7445-sun-top-ctrl", "syscon";
+            reg = <0x404000 0x51c>;
+        };
+
+        hif_cpubiuctrl: syscon@3e2400 {
+            compatible = "brcm,bcm7445-hif-cpubiuctrl", "syscon";
+            reg = <0x3e2400 0x5b4>;
+        };
+
+        hif_continuation: syscon@452000 {
+            compatible = "brcm,bcm7445-hif-continuation", "syscon";
+            reg = <0x452000 0x100>;
+        };
+    };
+
+Lastly, nodes that allow for support of SMP initialization and reboot are
+required:
+
+smpboot
+-------
+Required properties:
+
+    - compatible
+        The string "brcm,brcmstb-smpboot".
+
+    - syscon-cpu
+        A phandle / integer array property which lets the BSP know the location
+        of certain CPU power-on registers.
+
+        The layout of the property is as follows:
+            o a phandle to the "hif_cpubiuctrl" syscon node
+            o offset to the base CPU power zone register
+            o offset to the base CPU reset register
+
+    - syscon-cont
+        A phandle pointing to the syscon node which describes the CPU boot
+        continuation registers.
+            o a phandle to the "hif_continuation" syscon node
+
+example:
+    smpboot {
+        compatible = "brcm,brcmstb-smpboot";
+        syscon-cpu = <&hif_cpubiuctrl 0x88 0x178>;
+        syscon-cont = <&hif_continuation>;
+    };
+
+reboot
+-------
+Required properties
+
+    - compatible
+        The string property "brcm,brcmstb-reboot".
+
+    - syscon
+        A phandle / integer array that points to the syscon node which describes
+        the general system reset registers.
+            o a phandle to "sun_top_ctrl"
+            o offset to the "reset source enable" register
+            o offset to the "software master reset" register
+
+example:
+    reboot {
+        compatible = "brcm,brcmstb-reboot";
+        syscon = <&sun_top_ctrl 0x304 0x308>;
+    };
-- 
1.7.1

[PATCH v4 7/8] ARM: brcmstb: gic: add compatible string for Broadcom Brahma15

[Marc Carino]

Document the Broadcom Brahma B15 GIC implementation as compatible
with the ARM GIC standard.

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
---
 Documentation/devicetree/bindings/arm/gic.txt |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/gic.txt b/Documentation/devicetree/bindings/arm/gic.txt
index 3dfb0c0..d7409fd 100644
--- a/Documentation/devicetree/bindings/arm/gic.txt
+++ b/Documentation/devicetree/bindings/arm/gic.txt
@@ -15,6 +15,7 @@ Main node required properties:
 	"arm,cortex-a9-gic"
 	"arm,cortex-a7-gic"
 	"arm,arm11mp-gic"
+	"brcm,brahma-b15-gic"
 - interrupt-controller : Identifies the node as an interrupt controller
 - #interrupt-cells : Specifies the number of cells needed to encode an
   interrupt source.  The type shall be a <u32> and the value shall be 3.
-- 
1.7.1

[PATCH v4 8/8] ARM: brcmstb: dts: add a reference DTS for Broadcom 7445

[Marc Carino]

Add a sample DTS which will allow bootup of a board populated
with the BCM7445 chip.

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/boot/dts/bcm7445.dts |  111 +++++++++++++++++++++++++++++++++++++++++
 1 files changed, 111 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/boot/dts/bcm7445.dts

diff --git a/arch/arm/boot/dts/bcm7445.dts b/arch/arm/boot/dts/bcm7445.dts
new file mode 100644
index 0000000..6f2d532
--- /dev/null
+++ b/arch/arm/boot/dts/bcm7445.dts
@@ -0,0 +1,111 @@
+/dts-v1/;
+/include/ "skeleton.dtsi"
+
+/ {
+	#address-cells = <2>;
+	#size-cells = <2>;
+	model = "Broadcom STB (bcm7445)";
+	compatible = "brcm,bcm7445", "brcm,brcmstb";
+	interrupt-parent = <&gic>;
+
+	chosen {};
+
+	memory {
+		device_type = "memory";
+		reg = <0x00 0x00000000 0x00 0x40000000>,
+		      <0x00 0x40000000 0x00 0x40000000>,
+		      <0x00 0x80000000 0x00 0x40000000>;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			compatible = "brcm,brahma-b15";
+			device_type = "cpu";
+			reg = <0>;
+		};
+
+		cpu@1 {
+			compatible = "brcm,brahma-b15";
+			device_type = "cpu";
+			reg = <1>;
+		};
+
+		cpu@2 {
+			compatible = "brcm,brahma-b15";
+			device_type = "cpu";
+			reg = <2>;
+		};
+
+		cpu@3 {
+			compatible = "brcm,brahma-b15";
+			device_type = "cpu";
+			reg = <3>;
+		};
+	};
+
+	gic: interrupt-controller@ffd00000 {
+		compatible = "brcm,brahma-b15-gic", "arm,cortex-a15-gic";
+		reg = <0x00 0xffd01000 0x00 0x1000>,
+		      <0x00 0xffd02000 0x00 0x2000>,
+		      <0x00 0xffd04000 0x00 0x2000>,
+		      <0x00 0xffd06000 0x00 0x2000>;
+		interrupt-controller;
+		#interrupt-cells = <3>;
+	};
+
+	timer {
+		compatible = "arm,armv7-timer";
+		interrupts = <1 13 0xf08>,
+			     <1 14 0xf08>,
+			     <1 11 0xf08>,
+			     <1 10 0xf08>;
+	};
+
+	serial@f0406b00 {
+		compatible = "ns16550a";
+		reg = <0x00 0xf0406b00 0x00 0x20>;
+		reg-shift = <2>;
+		reg-io-width = <4>;
+		interrupts = <0 75 0x4>;
+		clock-frequency = <0x4d3f640>;
+	};
+
+	rdb {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		ranges = <0 0x00 0xf0000000 0x1000000>;
+
+		sun_top_ctrl: syscon@404000 {
+			compatible = "brcm,bcm7445-sun-top-ctrl",
+				     "syscon";
+			reg = <0x404000 0x51c>;
+		};
+
+		hif_cpubiuctrl: syscon@3e2400 {
+			compatible = "brcm,bcm7445-hif-cpubiuctrl",
+				     "syscon";
+			reg = <0x3e2400 0x5b4>;
+		};
+
+		hif_continuation: syscon@452000 {
+			compatible = "brcm,bcm7445-hif-continuation",
+				     "syscon";
+			reg = <0x452000 0x100>;
+		};
+	};
+
+	smpboot {
+		compatible = "brcm,brcmstb-smpboot";
+		syscon-cpu = <&hif_cpubiuctrl 0x88 0x178>;
+		syscon-cont = <&hif_continuation>;
+	};
+
+	reboot {
+		compatible = "brcm,brcmstb-reboot";
+		syscon = <&sun_top_ctrl 0x304 0x308>;
+	};
+};
-- 
1.7.1

Re: [PATCH v4 3/8] ARM: brcmstb: add debug UART for earlyprintk support

[Alexander Shiyan]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset=utf-8, Size: 1623 bytes --]

Пятница, 17 января 2014, 11:19 -08:00 от Marc Carino <marc.ceeeee@gmail.com>:
> Add the UART definitions needed to support earlyprintk on brcmstb machines.
> 
> Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
> Acked-by: Florian Fainelli <f.fainelli@gmail.com>
> ---
>  arch/arm/Kconfig.debug |   16 +++++++++++++++-
>  1 files changed, 15 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
> index 5765abf..266c699 100644
> --- a/arch/arm/Kconfig.debug
> +++ b/arch/arm/Kconfig.debug
> @@ -94,6 +94,17 @@ choice
>  		depends on ARCH_BCM2835
>  		select DEBUG_UART_PL01X
>  
> +	config DEBUG_BRCMSTB_UART
> +		bool "Use BRCMSTB UART for low-level debug"
> +		depends on ARCH_BRCMSTB
> +		select DEBUG_UART_8250
> +		help
> +		  Say Y here if you want the debug print routines to direct
> +		  their output to the first serial port on these devices.
> +
> +		  If you have a Broadcom STB chip and would like early print
> +		  messages to appear over the UART, select this option.
> +
>  	config DEBUG_CLPS711X_UART1
>  		bool "Kernel low-level debugging messages via UART1"
>  		depends on ARCH_CLPS711X
> @@ -988,6 +999,7 @@ config DEBUG_UART_PHYS
>  	default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2
>  	default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3
>  	default 0x20201000 if DEBUG_BCM2835
> +	default 0xf0406b00 if DEBUG_BRCMSTB_UART

This should be sorted by address.

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Re: [PATCH v4 8/8] ARM: brcmstb: dts: add a reference DTS for Broadcom 7445

[Arnd Bergmann]

On Friday 17 January 2014, Marc Carino wrote:
> +       serial@f0406b00 {
> +               compatible = "ns16550a";
> +               reg = <0x00 0xf0406b00 0x00 0x20>;
> +               reg-shift = <2>;
> +               reg-io-width = <4>;
> +               interrupts = <0 75 0x4>;
> +               clock-frequency = <0x4d3f640>;
> +       };
> +
> +       rdb {
> +               #address-cells = <1>;
> +               #size-cells = <1>;
> +               compatible = "simple-bus";
> +               ranges = <0 0x00 0xf0000000 0x1000000>;
> +
> +               sun_top_ctrl: syscon@404000 {
> +                       compatible = "brcm,bcm7445-sun-top-ctrl",
> +                                    "syscon";
> +                       reg = <0x404000 0x51c>;
> +               };
> +

Yes, this looks better, but as a minor comment, the serial device above
should really be part of the rdb bus now, since that encompasses the
0xf0000000 device range.

	Arnd