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power: twl6030: Clear VUSB_IN_PMID bit on USB device setup

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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>
This commit is contained in:
Paul Kocialkowski 2016-02-27 19:19:04 +01:00 • committed by Tom Rini
parent 0343f71f09
commit 6313c65004
2 changed files with 2 additions and 0 deletions
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1
drivers/power/twl6030.c
View file

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

1
include/twl6030.h
View file

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