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mfd: ab8500-sysctrl: Provide a platform specific pm_power_off() call-back

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The kernel allows us to specify a function call-back which will be
invoked when a system power-off request has been received. Here we
provide one which is to be used when shutting down AB8500 based
platforms.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
This commit is contained in:
Lee Jones
2013-01-14 13:26:15 +00:00
parent 949db153b6
commit 379749c463
2 changed files with 24 additions and 0 deletions
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22
drivers/mfd/ab8500-sysctrl.c
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@@ -7,12 +7,29 @@
#include <linux/err.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/signal.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500/ab8500-sysctrl.h>
static struct device *sysctrl_dev;
void ab8500_power_off(void)
{
sigset_t old;
sigset_t all;
sigfillset(&all);
if (!sigprocmask(SIG_BLOCK, &all, &old)) {
(void)ab8500_sysctrl_set(AB8500_STW4500CTRL1,
AB8500_STW4500CTRL1_SWOFF |
AB8500_STW4500CTRL1_SWRESET4500N);
(void)sigprocmask(SIG_SETMASK, &old, NULL);
}
}
static inline bool valid_bank(u8 bank)
{
return ((bank == AB8500_SYS_CTRL1_BLOCK) ||
@@ -51,7 +68,12 @@ int ab8500_sysctrl_write(u16 reg, u8 mask, u8 value)
static int ab8500_sysctrl_probe(struct platform_device *pdev)
{
struct ab8500_platform_data *plat;
sysctrl_dev = &pdev->dev;
plat = dev_get_platdata(pdev->dev.parent);
if (plat->pm_power_off)
pm_power_off = ab8500_power_off;
return 0;
}