power: twl6030: Some more explicit registers and values definitions

This makes the twl6030 mmc and usb-related power registers and values
definitions more explicit and clear and adds prefixes to them.

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

drivers/power/twl6030.c

@@ -214,22 +214,26 @@ void twl6030_init_battery_charging(void)
 
 void twl6030_power_mmc_init()
 {
-	/* set voltage to 3.0 and turnon for APP */
-	twl6030_i2c_write_u8(TWL6030_CHIP_PM, VMMC_CFG_VOLTATE, 0x15);
-	twl6030_i2c_write_u8(TWL6030_CHIP_PM, VMMC_CFG_STATE, 0x21);
+	/* 3.0V voltage output for VMMC */
+	twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_VOLTAGE,
+		TWL6030_CFG_VOLTAGE_30);
+
+	/* Enable P1 output for VMMC */
+	twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VMMC_CFG_STATE,
+		TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
 }
 
 void twl6030_usb_device_settings()
 {
-	u8 data = 0;
-
-	/* Select APP Group and set state to ON */
-	twl6030_i2c_write_u8(TWL6030_CHIP_PM, VUSB_CFG_STATE, 0x21);
+	u8 value = 0;
 
-	twl6030_i2c_read_u8(TWL6030_CHIP_PM, MISC2, &data);
-	data |= 0x10;
+	/* Enable P1 output for VUSB */
+	twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_VUSB_CFG_STATE,
+		TWL6030_CFG_STATE_P1 | TWL6030_CFG_STATE_ON);
 
-	/* Select the input supply for VBUS regulator */
-	twl6030_i2c_write_u8(TWL6030_CHIP_PM, MISC2, data);
+	/* Select the input supply for VUSB regulator */
+	twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_MISC2, &value);
+	value |= TWL6030_MISC2_VUSB_IN_VSYS;
+	twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_MISC2, value);
 }
 #endif

include/twl6030.h

@@ -20,16 +20,22 @@
 #define TWL6030_CHIP_PWM	0x49
 
 /* Slave Address 0x48 */
-#define VMMC_CFG_STATE		0x9A
-#define VMMC_CFG_VOLTATE	0x9B
-#define VUSB_CFG_STATE		0xA2
+#define TWL6030_VMMC_CFG_STATE		0x9A
+#define TWL6030_VMMC_CFG_VOLTAGE	0x9B
+#define TWL6030_VUSB_CFG_STATE		0xA2
+
+#define TWL6030_CFG_GRP_P1		(1 << 0)
+#define TWL6030_CFG_STATE_ON		(1 << 0)
+#define TWL6030_CFG_STATE_P1		(TWL6030_CFG_GRP_P1 << 5)
+#define TWL6030_CFG_VOLTAGE_30		0x15
 
 #define MISC1			0xE4
 #define VAC_MEAS		(1 << 2)
 #define VBAT_MEAS		(1 << 1)
 #define BB_MEAS			(1 << 0)
 
-#define MISC2			0xE5
+#define TWL6030_MISC2			0xE5
+#define TWL6030_MISC2_VUSB_IN_VSYS	(1 << 4)
 
 /* Slave Address 0x49 */