Merge tag 'keystone-soc-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into next/soc

From Santosh Shilimkar:
SOC support for Keystone II devices:
- Minimal machine and device-tree support with arch_timers and console UART
- Reboot hook using PLL reset
- Low level debug support using UART
- SMP boot support

* tag 'keystone-soc-for-arm-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone:
  ARM: keystone: Enable SMP support on Keystone machines
  ARM: keystone: Add minimal TI Keystone platform support
  ARM: dts: keystone: Add minimal Keystone SOC device tree data

Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 75 insertions, 0 deletions

diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c
new file mode 100644
index 000000000000..fe4d9ff93a7e
--- /dev/null
+++ b/arch/arm/mach-keystone/keystone.c
@@ -0,0 +1,75 @@
+/*
+ * Keystone2 based boards and SOC related code.
+ *
+ * Copyright 2013 Texas Instruments, Inc.
+ *	Cyril Chemparathy <cyril@ti.com>
+ *	Santosh Shilimkar <santosh.shillimkar@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <linux/of_address.h>
+
+#include <asm/setup.h>
+#include <asm/mach/map.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <asm/smp_plat.h>
+
+#include "keystone.h"
+
+#define PLL_RESET_WRITE_KEY_MASK		0xffff0000
+#define PLL_RESET_WRITE_KEY			0x5a69
+#define PLL_RESET				BIT(16)
+
+static void __iomem *keystone_rstctrl;
+
+static void __init keystone_init(void)
+{
+	struct device_node *node;
+
+	node = of_find_compatible_node(NULL, NULL, "ti,keystone-reset");
+	if (WARN_ON(!node))
+		pr_warn("ti,keystone-reset node undefined\n");
+
+	keystone_rstctrl = of_iomap(node, 0);
+	if (WARN_ON(!keystone_rstctrl))
+		pr_warn("ti,keystone-reset iomap error\n");
+
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
+}
+
+static const char *keystone_match[] __initconst = {
+	"ti,keystone-evm",
+	NULL,
+};
+
+void keystone_restart(char mode, const char *cmd)
+{
+	u32 val;
+
+	BUG_ON(!keystone_rstctrl);
+
+	/* Enable write access to RSTCTRL */
+	val = readl(keystone_rstctrl);
+	val &= PLL_RESET_WRITE_KEY_MASK;
+	val |= PLL_RESET_WRITE_KEY;
+	writel(val, keystone_rstctrl);
+
+	/* Reset the SOC */
+	val = readl(keystone_rstctrl);
+	val &= ~PLL_RESET;
+	writel(val, keystone_rstctrl);
+}
+
+DT_MACHINE_START(KEYSTONE, "Keystone")
+	.smp		= smp_ops(keystone_smp_ops),
+	.init_machine	= keystone_init,
+	.dt_compat	= keystone_match,
+	.restart	= keystone_restart,
+MACHINE_END