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mx31moboard: Add poweroff support 

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@epfl.ch>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Philippe Rétornaz 2011-09-20 10:57:43 +02:00 committed by Sascha Hauer
parent bbb433639c
commit 40d97b89bd
2 changed files with 18 additions and 0 deletions
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17
arch/arm/mach-imx/mach-mx31moboard.c
View File

@ -28,6 +28,9 @@
#include <linux/spi/spi.h> #include <linux/spi/spi.h>
#include <linux/types.h> #include <linux/types.h>
#include <linux/memblock.h> #include <linux/memblock.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/usb/otg.h> #include <linux/usb/otg.h>
#include <linux/usb/ulpi.h> #include <linux/usb/ulpi.h>
@ -490,6 +493,18 @@ static int __init mx31moboard_init_cam(void)
} }
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; static int mx31moboard_baseboard;
core_param(mx31moboard_baseboard, mx31moboard_baseboard, int, 0444); core_param(mx31moboard_baseboard, mx31moboard_baseboard, int, 0444);
@ -528,6 +543,8 @@ static void __init mx31moboard_init(void)
moboard_usbh2_init(); moboard_usbh2_init();
pm_power_off = mx31moboard_poweroff;
switch (mx31moboard_baseboard) { switch (mx31moboard_baseboard) {
case MX31NOBOARD: case MX31NOBOARD:
break; break;

1
arch/arm/plat-mxc/include/mach/iomux-mx3.h
View File

@ -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_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_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_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)
/* /*