diff options
| author | Lee Jones <lee.jones@linaro.org> | 2013-01-14 14:26:15 +0100 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2013-02-04 09:28:41 +0100 |
| commit | 379749c46320c82df95c7909ec888da8ed1fb22c (patch) | |
| tree | 5d57a71f4bdf660a20f23b02b7bfa9f9361b9d2f /drivers/mfd/ab8500-sysctrl.c | |
| parent | Linux 3.8-rc5 (diff) | |
| download | linux-379749c46320c82df95c7909ec888da8ed1fb22c.tar.xz linux-379749c46320c82df95c7909ec888da8ed1fb22c.zip | |
mfd: ab8500-sysctrl: Provide a platform specific pm_power_off() call-back
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>
Diffstat (limited to 'drivers/mfd/ab8500-sysctrl.c')
| -rw-r--r-- | drivers/mfd/ab8500-sysctrl.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/mfd/ab8500-sysctrl.c b/drivers/mfd/ab8500-sysctrl.c index 8a33b2c7eead..888e066c715b 100644 --- a/drivers/mfd/ab8500-sysctrl.c +++ b/drivers/mfd/ab8500-sysctrl.c @@ -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; } |