mfd: Support software initiated shutdown of WM831x PMICs

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / mfd / wm831x-core.c

diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 9338f8dcbb83581661793936fceb1a794efff0f2..e758c89ac5bb5aa08e3ffe591dadc431c0b333e1 100644 (file)
--- 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");