[PATCH 1/1] mx31moboard: Add poweroff support
Philippe Rétornaz
philippe.retornaz at epfl.ch
Tue Sep 20 04:57:43 EDT 2011
This patch add poweroff support on mx31moboard platform.
A watchdog timeout is generated while enabling the watchdog
reset IO to trigger a PMIC poweroff.
Signed-off-by: Philippe Rétornaz <philippe.retornaz at epfl.ch>
---
arch/arm/mach-imx/mach-mx31moboard.c | 17 +++++++++++++++++
arch/arm/plat-mxc/include/mach/iomux-mx3.h | 1 +
2 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-imx/mach-mx31moboard.c b/arch/arm/mach-imx/mach-mx31moboard.c
index 2a43492..3d3d10f 100644
--- a/arch/arm/mach-imx/mach-mx31moboard.c
+++ b/arch/arm/mach-imx/mach-mx31moboard.c
@@ -29,6 +29,9 @@
#include <linux/types.h>
#include <linux/memblock.h>
#include <linux/input.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/err.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>
@@ -509,6 +512,18 @@ err:
}
+static void mx31moboard_poweroff(void)
+{
+ struct clk *clk = clk_get_sys("imx2-wdt.0", NULL);
+
+ if (!IS_ERR(clk))
+ clk_enable(clk);
+
+ mxc_iomux_mode(MX31_PIN_WATCHDOG_RST__WATCHDOG_RST);
+
+ __raw_writew(1 << 6 | 1 << 2, MX31_IO_ADDRESS(MX31_WDOG_BASE_ADDR));
+}
+
static int mx31moboard_baseboard;
core_param(mx31moboard_baseboard, mx31moboard_baseboard, int, 0444);
@@ -544,6 +559,8 @@ static void __init mx31moboard_init(void)
moboard_usbh2_init();
+ pm_power_off = mx31moboard_poweroff;
+
switch (mx31moboard_baseboard) {
case MX31NOBOARD:
break;
diff --git a/arch/arm/plat-mxc/include/mach/iomux-mx3.h b/arch/arm/plat-mxc/include/mach/iomux-mx3.h
index c92f0b1..63f22a0 100644
--- a/arch/arm/plat-mxc/include/mach/iomux-mx3.h
+++ b/arch/arm/plat-mxc/include/mach/iomux-mx3.h
@@ -735,6 +735,7 @@ enum iomux_pins {
#define MX31_PIN_KEY_COL5_KEY_COL5 IOMUX_MODE(MX31_PIN_KEY_COL5, IOMUX_CONFIG_FUNC)
#define MX31_PIN_KEY_COL6_KEY_COL6 IOMUX_MODE(MX31_PIN_KEY_COL6, IOMUX_CONFIG_FUNC)
#define MX31_PIN_KEY_COL7_KEY_COL7 IOMUX_MODE(MX31_PIN_KEY_COL7, IOMUX_CONFIG_FUNC)
+#define MX31_PIN_WATCHDOG_RST__WATCHDOG_RST IOMUX_MODE(MX31_PIN_WATCHDOG_RST, IOMUX_CONFIG_FUNC)
/*
--
1.6.3.3
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