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mfd: Support software initiated shutdown of WM831x PMICs

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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>
This commit is contained in:
Mark Brown 2011-09-15 18:54:53 +02:00 • committed by Samuel Ortiz
commit 5da721c87a
5 changed files with 33 additions and 0 deletions
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3
include/linux/mfd/wm831x/core.h
View file

@ -374,6 +374,8 @@ struct wm831x {
int irq_masks_cur[WM831X_NUM_IRQ_REGS]; /* Currently active value */
int irq_masks_cache[WM831X_NUM_IRQ_REGS]; /* Cached hardware value */
bool soft_shutdown;
/* Chip revision based flags */
unsigned has_gpio_ena:1; /* Has GPIO enable bit */
unsigned has_cs_sts:1; /* Has current sink status bit */
@ -412,6 +414,7 @@ int wm831x_bulk_read(struct wm831x *wm831x, unsigned short reg,
int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq);
void wm831x_device_exit(struct wm831x *wm831x);
int wm831x_device_suspend(struct wm831x *wm831x);
void wm831x_device_shutdown(struct wm831x *wm831x);
int wm831x_irq_init(struct wm831x *wm831x, int irq);
void wm831x_irq_exit(struct wm831x *wm831x);
void wm831x_auxadc_init(struct wm831x *wm831x);

3
include/linux/mfd/wm831x/pdata.h
View file

@ -123,6 +123,9 @@ struct wm831x_pdata {
/** Disable the touchscreen */
bool disable_touch;
/** The driver should initiate a power off sequence during shutdown */
bool soft_shutdown;
int irq_base;
int gpio_base;
int gpio_defaults[WM831X_GPIO_NUM];