From: Paul Kocialkowski Date: Sat, 27 Feb 2016 18:19:04 +0000 (+0100) Subject: power: twl6030: Clear VUSB_IN_PMID bit on USB device setup X-Git-Tag: KARO-TXSD-2017-03-15~1618 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6313c6500484ed85892f425e3ca93f706fd9a2ea;p=karo-tx-uboot.git 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 --- diff --git a/drivers/power/twl6030.c b/drivers/power/twl6030.c index df43cca34a..c6d06f19e9 100644 --- a/drivers/power/twl6030.c +++ b/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 diff --git a/include/twl6030.h b/include/twl6030.h index e68393c95d..9a1c645d88 100644 --- a/include/twl6030.h +++ b/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 */