power: twl6030: Configure VUSB voltage on USB device setup

This explicitly sets VUSB voltage to 3.3V when enabling USB.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>

drivers/power/twl6030.c

@@ -248,6 +248,10 @@ void twl6030_usb_device_settings()
 {
 	u8 value = 0;
 
+	/* 3.3V voltage output for VUSB */
+	twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_VOLTAGE,
+		TWL6030_CFG_VOLTAGE_33);
+
 	/* Enable P1 output for VUSB */
 	twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_STATE,
 		TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);

include/twl6030.h

@@ -32,6 +32,7 @@
 #define TWL6030_VMMC_CFG_STATE		0x9A
 #define TWL6030_VMMC_CFG_VOLTAGE	0x9B
 #define TWL6030_VUSB_CFG_STATE		0xA2
+#define TWL6030_VUSB_CFG_VOLTAGE	0xA3
 
 #define TWL6030_CFG_GRP_P1		(1 << 0)
 #define TWL6030_CFG_STATE_ON		(1 << 0)
@@ -39,6 +40,7 @@
 #define TWL6030_CFG_VOLTAGE_18		0x09
 #define TWL6030_CFG_VOLTAGE_28		0x13
 #define TWL6030_CFG_VOLTAGE_30		0x15
+#define TWL6030_CFG_VOLTAGE_33		0x18
 
 #define MISC1			0xE4
 #define VAC_MEAS		(1 << 2)