diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2011-12-09 00:51:26 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2012-01-05 13:57:22 +0100 |
| commit | 0575fb754dbfc32a01f297e778533340a533ec68 (patch) | |
| tree | 1b416ae6fca7d905003e64c928c7d37032acfd15 /arch/arm/mach-imx/mach-imx6q.c | |
| parent | ARM: restart: remove the now empty arch_reset() (diff) | |
| download | linux-0575fb754dbfc32a01f297e778533340a533ec68.tar.xz linux-0575fb754dbfc32a01f297e778533340a533ec68.zip | |
ARM: 7198/1: arm/imx6: add restart support for imx6q
The restart support was missed from the initial imx6q submission.
The mxc_restart() does not work for imx6q. Instead, this patch adds
the restart for imx6q.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-imx/mach-imx6q.c')
| -rw-r--r-- | arch/arm/mach-imx/mach-imx6q.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/arch/arm/mach-imx/mach-imx6q.c b/arch/arm/mach-imx/mach-imx6q.c index 7c6f9ecf7588..05b49bb5d677 100644 --- a/arch/arm/mach-imx/mach-imx6q.c +++ b/arch/arm/mach-imx/mach-imx6q.c @@ -10,10 +10,13 @@ * http://www.gnu.org/copyleft/gpl.html */ +#include <linux/delay.h> #include <linux/init.h> +#include <linux/io.h> #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/of.h> +#include <linux/of_address.h> #include <linux/of_irq.h> #include <linux/of_platform.h> #include <asm/hardware/cache-l2x0.h> @@ -23,6 +26,36 @@ #include <mach/common.h> #include <mach/hardware.h> +void imx6q_restart(char mode, const char *cmd) +{ + struct device_node *np; + void __iomem *wdog_base; + + np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-wdt"); + wdog_base = of_iomap(np, 0); + if (!wdog_base) + goto soft; + + imx_src_prepare_restart(); + + /* enable wdog */ + writew_relaxed(1 << 2, wdog_base); + /* write twice to ensure the request will not get ignored */ + writew_relaxed(1 << 2, wdog_base); + + /* wait for reset to assert ... */ + mdelay(500); + + pr_err("Watchdog reset failed to assert reset\n"); + + /* delay to allow the serial port to show the message */ + mdelay(50); + +soft: + /* we'll take a jump through zero as a poor second */ + soft_restart(0); +} + static void __init imx6q_init_machine(void) { of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); @@ -83,5 +116,5 @@ DT_MACHINE_START(IMX6Q, "Freescale i.MX6 Quad (Device Tree)") .timer = &imx6q_timer, .init_machine = imx6q_init_machine, .dt_compat = imx6q_dt_compat, - .restart = mxc_restart, + .restart = imx6q_restart, MACHINE_END |