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 <cont...@paulk.fr>
---
drivers/power/twl6030.c | 1 +
include/twl6030.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/drivers/power/twl6030.c b/drivers/power/twl6030.c
index df43cca..c6d06f1 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 e68393c..9a1c645 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 */
--
2.6.4
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