power: twl6030: Power off support

This adds support for powering off (the omap SoC) from the twl6030.
Signed-off-by: NPaul Kocialkowski <contact@paulk.fr>

drivers/power/twl6030.c

@@ -28,6 +28,7 @@ static struct twl6030_data twl6032_info = {
 	.vbat_shift	= TWL6032_VBAT_SHIFT,
 };
 
+
 static int twl6030_gpadc_read_channel(u8 channel_no)
 {
 	u8 lsb = 0;
@@ -71,6 +72,13 @@ static int twl6030_gpadc_sw2_trigger(void)
 	return 0;
 }
 
+void twl6030_power_off(void)
+{
+	twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_PHOENIX_DEV_ON,
+		TWL6030_PHOENIX_APP_DEVOFF | TWL6030_PHOENIX_CON_DEVOFF |
+		TWL6030_PHOENIX_MOD_DEVOFF);
+}
+
 void twl6030_stop_usb_charging(void)
 {
 	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1, 0);

include/twl6030.h

@@ -20,6 +20,12 @@
 #define TWL6030_CHIP_PWM	0x49
 
 /* Slave Address 0x48 */
+#define TWL6030_PHOENIX_DEV_ON		0x25
+
+#define TWL6030_PHOENIX_APP_DEVOFF	(1 << 0)
+#define TWL6030_PHOENIX_CON_DEVOFF	(1 << 1)
+#define TWL6030_PHOENIX_MOD_DEVOFF	(1 << 2)
+
 #define TWL6030_PH_STS_BOOT		0x29
 
 #define TWL6030_PH_STS_BOOT0		(1 << 0)
@@ -182,6 +188,7 @@ static inline int twl6030_i2c_read_u8(u8 chip_no, u8 reg, u8 *val)
 	return i2c_read(chip_no, reg, 1, val, 1);
 }
 
+void twl6030_power_off(void);
 void twl6030_init_battery_charging(void);
 void twl6030_usb_device_settings(void);
 void twl6030_start_usb_charging(void);