diff options
| author |   Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-09-15 18:54:53 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2011-09-20 13:02:09 +0100 |
| commit | 523d9cfbb2094e095ff08a01c4eac10cc7d287c3 (patch) | |
| tree | d1cd9bc2434332e2e79170d6c21d443f2ce5c3ff /drivers/mfd/wm831x-core.c | |
| parent | regmap: Allow drivers to control cache_only flag (diff) | |
| download | linux-dev-523d9cfbb2094e095ff08a01c4eac10cc7d287c3.tar.xz linux-dev-523d9cfbb2094e095ff08a01c4eac10cc7d287c3.zip | |
mfd: Support software initiated shutdown of WM831x PMICs
In systems where there is no hardware signal from the processor to the
PMIC to initiate the final power off sequence we must initiate the
shutdown with a register write to the PMIC. Support such systems in the
driver. Since this may prevent a full shutdown of the system platform
data is used to enable the feature.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd/wm831x-core.c')
| -rw-r--r-- | drivers/mfd/wm831x-core.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c index 9338f8dcbb83..e758c89ac5bb 100644 --- a/drivers/mfd/wm831x-core.c +++ b/drivers/mfd/wm831x-core.c @@ -25,6 +25,7 @@ #include <linux/mfd/wm831x/irq.h> #include <linux/mfd/wm831x/auxadc.h> #include <linux/mfd/wm831x/otp.h> +#include <linux/mfd/wm831x/pmu.h> #include <linux/mfd/wm831x/regulator.h> /* Current settings - values are 2*2^(reg_val/4) microamps. These are @@ -1621,6 +1622,7 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq) mutex_init(&wm831x->io_lock); mutex_init(&wm831x->key_lock); dev_set_drvdata(wm831x->dev, wm831x); + wm831x->soft_shutdown = pdata->soft_shutdown; ret = wm831x_reg_read(wm831x, WM831X_PARENT_ID); if (ret < 0) { @@ -1922,6 +1924,15 @@ int wm831x_device_suspend(struct wm831x *wm831x) return 0; } +void wm831x_device_shutdown(struct wm831x *wm831x) +{ + if (wm831x->soft_shutdown) { + dev_info(wm831x->dev, "Initiating shutdown...\n"); + wm831x_set_bits(wm831x, WM831X_POWER_STATE, WM831X_CHIP_ON, 0); + } +} +EXPORT_SYMBOL_GPL(wm831x_device_shutdown); + MODULE_DESCRIPTION("Core support for the WM831X AudioPlus PMIC"); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Mark Brown"); |