GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Hung-Te Lin 2014-04-25 08:21:24 +08:00 committed by Marc Jones
parent 6a16f697d8
commit 86bd91a69a
3 changed files with 3 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/mainboard/google/nyan/pmic.c
View File

@ -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},
@ -99,15 +99,6 @@ 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)

11
src/mainboard/google/nyan_big/pmic.c
View File

@ -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},
@ -97,15 +97,6 @@ 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)

11
src/mainboard/google/nyan_blaze/pmic.c
View File

@ -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},
@ -97,15 +97,6 @@ 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)