diff options
| author | Hung-Te Lin <hungte@chromium.org> | 2014-04-25 08:21:24 +0800 |
|---|---|---|
| committer | Marc Jones <marc.jones@se-eng.com> | 2014-12-19 23:47:07 +0100 |
| commit | 86bd91a69a3fb285ce0ec2c3842d879035ee1269 (patch) | |
| tree | bfb347f0f75857eeb95b1207969c68fc6a5af08a /src/mainboard/google/nyan | |
| parent | 6a16f697d8ab27eb9a19f9c0ec0ca82ca60adc47 (diff) | |
| download | coreboot-86bd91a69a3fb285ce0ec2c3842d879035ee1269.tar.xz | |
nyan*: Clear VDDIO_SDMMC3 to reset SD card reader.
When across warm reset, if VDD_3V3_SD_CARD gets power-cycled but VDDIO_SDMMC3
does not, we will get ~1.5V leakage on VDD. To fix that, we reset VDDIO_SDMMC3
to 0 along with VDD_3V3_SD_CARD in Coreboot. Payloads must turn on VDDIO_SDMMC3
explicitly before accessing SD card.
Note the warnings of "VDD_SDMMC must set early" in comment seems only happens on
U-Boot and can be removed.
BUG=chrome-os-partner:27053
BRNACH=nyan
TEST=Ctrl-U to boot from SD card, login and type "reboot", then Ctrl-U to boot
again. Without this patch, system will fail in loading kernel.
Original-Change-Id: I7f85995317d18587d514ea3afcff3bfea0a33e93
Original-Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/196961
Original-Reviewed-by: Gabe Black <gabeblack@chromium.org>
Original-Tested-by: Andrew Bresticker <abrestic@chromium.org>
(cherry picked from commit 2cfdb78d9dc229a3c06f19bbe137d59d923908a4)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: Ie7d814e0424478c35a56fbc959437ee6a555684a
Reviewed-on: http://review.coreboot.org/7866
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/mainboard/google/nyan')
| -rw-r--r-- | src/mainboard/google/nyan/pmic.c | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/src/mainboard/google/nyan/pmic.c b/src/mainboard/google/nyan/pmic.c index 7ec9290fd9..a6e881d10f 100644 --- a/src/mainboard/google/nyan/pmic.c +++ b/src/mainboard/google/nyan/pmic.c @@ -50,7 +50,7 @@ static struct as3722_init_reg init_list[] = { {AS3722_LDO2, 0x10, 0}, {AS3722_LDO4, 0x00, 0}, {AS3722_LDO5, 0x00, 0}, - {AS3722_LDO6, 0x3F, 0}, + {AS3722_LDO6, 0x00, 0}, {AS3722_LDO7, 0x00, 0}, {AS3722_LDO9, 0x00, 0}, {AS3722_LDO10, 0x00, 0}, @@ -100,15 +100,6 @@ void pmic_init(unsigned bus) pmic_write_reg(bus, 0x12, 0x10, 1); /* - * Bring up VDD_SDMMC via the AS3722 PMIC on the PWR I2C bus. - * First set it to bypass 3.3V straight thru, then enable the regulator - * - * NOTE: We do this early because doing it later seems to hose the CPU - * power rail/partition startup. Need to debug. - */ - pmic_write_reg(bus, 0x16, 0x3f, 1); - - /* * Panel power GPIO O4. Set mode for GPIO4 (0x0c to 7), then set * the value (register 0x20 bit 4) */ |