power: twl6030: Clear VUSB_IN_PMID bit on USB device setup

When booting from USB, the bootrom sets the VUSB_IN_PMID bit of the MISC2
register of the TWL6030. However, U-Boot sets the VUSB_IN_VSYS bit to enable
VBUS input. As both bits are contradictory, enabling both disables the input,
according to the TWL6030 TRM.

Thus, we need to clear the VUSB_IN_PMID bit in case of an USB boot (which could
just as well be a memory boot after USB timed out).

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

drivers/power/twl6030.c

@@ -259,6 +259,7 @@ void twl6030_usb_device_settings()
 	/* Select the input supply for VUSB regulator */
 	twl6030_i2c_read_u8(TWL6030_CHIP_PM, TWL6030_MISC2, &value);
 	value |= TWL6030_MISC2_VUSB_IN_VSYS;
+	value &= ~TWL6030_MISC2_VUSB_IN_PMID;
 	twl6030_i2c_write_u8(TWL6030_CHIP_PM, TWL6030_MISC2, value);
 }
 #endif

include/twl6030.h

@@ -48,6 +48,7 @@
 #define BB_MEAS			(1 << 0)
 
 #define TWL6030_MISC2			0xE5
+#define TWL6030_MISC2_VUSB_IN_PMID	(1 << 3)
 #define TWL6030_MISC2_VUSB_IN_VSYS	(1 << 4)
 
 /* Slave Address 0x49 */