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authorOlof Johansson <olof@lixom.net>2012-11-29 22:39:11 -0800
committerOlof Johansson <olof@lixom.net>2012-11-29 22:39:11 -0800
commit68fb31706d50dd5d337cd7928aeb780358b910a5 (patch)
tree6632d05aae22e99d7f128104b536bfdfc225a696 /arch/arm/mach-imx/system.c
parent9489e9dcae718d5fde988e4a684a0f55b5f94d17 (diff)
parentc8a1ceccf394b2f99feed2b702732140e9f0f92d (diff)
Merge branch 'next/cleanup' into next/pm2
By Tony Lindgren (36) and others via Tony Lindgren (22) and others * next/cleanup: (303 commits) ARM: Kirkwood: Use hw_pci.ops instead of hw_pci.scan ARM: OMAP3: cm-t3517: use GPTIMER for system clock ARM: OMAP2+: timer: remove CONFIG_OMAP_32K_TIMER ARM: SAMSUNG: use devm_ functions for ADC driver ARM: EXYNOS: no duplicate mask/unmask in eint0_15 ARM: S3C24XX: SPI clock channel setup is fixed for S3C2443 ARM: EXYNOS: Remove i2c0 resource information and setting of device names ARM: Kirkwood: checkpatch cleanups ARM: Kirkwood: Fix sparse warnings. ARM: Kirkwood: Remove unused includes ARM: kirkwood: cleanup lsxl board includes ARM: integrator: use BUG_ON where possible ARM: integrator: push down SC dependencies ARM: integrator: delete static UART1 mapping ARM: integrator: delete SC mapping on the CP ARM: integrator: remove static CP syscon mapping ARM: integrator: remove static AP syscon mapping ARM: integrator: hook the CP into the SoC bus ARM: integrator: hook the AP into the SoC bus ARM: OMAP2+: Fix compiler warning for 32k timer ...
Diffstat (limited to 'arch/arm/mach-imx/system.c')
-rw-r--r--arch/arm/mach-imx/system.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/system.c b/arch/arm/mach-imx/system.c
new file mode 100644
index 00000000000..695e0d73bf8
--- /dev/null
+++ b/arch/arm/mach-imx/system.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 1999 ARM Limited
+ * Copyright (C) 2000 Deep Blue Solutions Ltd
+ * Copyright 2006-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
+ * Copyright 2009 Ilya Yanok, Emcraft Systems Ltd, yanok@emcraft.com
+ *
+ * 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/kernel.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+
+#include <asm/system_misc.h>
+#include <asm/proc-fns.h>
+#include <asm/mach-types.h>
+
+#include "common.h"
+#include "hardware.h"
+
+static void __iomem *wdog_base;
+
+/*
+ * Reset the system. It is called by machine_restart().
+ */
+void mxc_restart(char mode, const char *cmd)
+{
+ unsigned int wcr_enable;
+
+ if (cpu_is_mx1()) {
+ wcr_enable = (1 << 0);
+ } else {
+ struct clk *clk;
+
+ clk = clk_get_sys("imx2-wdt.0", NULL);
+ if (!IS_ERR(clk))
+ clk_prepare_enable(clk);
+ wcr_enable = (1 << 2);
+ }
+
+ /* Assert SRS signal */
+ __raw_writew(wcr_enable, wdog_base);
+
+ /* wait for reset to assert... */
+ mdelay(500);
+
+ printk(KERN_ERR "Watchdog reset failed to assert reset\n");
+
+ /* delay to allow the serial port to show the message */
+ mdelay(50);
+
+ /* we'll take a jump through zero as a poor second */
+ soft_restart(0);
+}
+
+void mxc_arch_reset_init(void __iomem *base)
+{
+ wdog_base = base;
+}