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| author | Randall Spangler <rspangler@chromium.org> | 2013-08-08 11:26:49 -0700 |
|---|---|---|
| committer | Randall Spangler <rspangler@chromium.org> | 2013-08-09 17:50:31 -0700 |
| commit | 9f8c3d7323239d82140633374971d9b143bc5ca7 (patch) | |
| tree | 12128b68ff9da961a8007abfbe7454ce8d15b65b | |
| parent | 86ff5d77c799e6a78e413fc5b451ebbc91c1fbbe (diff) | |
| download | chrome-ec-9f8c3d7323239d82140633374971d9b143bc5ca7.tar.gz | |
pit: leave 1.35V rail on during warm reboot
This maintains the contents of AP RAM during the warm reboot.
BUG=chrome-os-partner:21483
BRANCH=pit
TEST=from u-boot prompt,
Peach # mm 41f00000
41f00000: 00000000 ? 9
41f00004: 00000000 ? 9
41f00008: 00000000 ? 9
41f0000c: 00000000 ? 9
41f00010: 00000000 ? 9
41f00014: 00000000 ? 9
41f00018: 00000000 ? 9
41f0001c: 00000000 ? 9
41f00020: 00000000 ? 9
41f00024: 00000000 ? 9
41f00028: 00000000 ? 9
41f0002c: 00000000 ? 9
41f00030: 00000000 ? 9
41f00034: 00004000 ? 9
41f00038: 00000000 ? 9
41f0003c: 00000000 ? 9
41f00040: 00000000 ? .
Peach # md 41f00000
41f00000: 00000009 00000009 00000009 00000009 ................
41f00010: 00000009 00000009 00000009 00000009 ................
41f00020: 00000009 00000009 00000009 00000009 ................
41f00030: 00000009 00000009 00000009 00000009 ................
Then Alt+VolUp+R. Then repeat md command at u-boot prompt.
Orig-Change-Id: I07de4df2fe4c4dd86b88bbd208e1fb87860fa9d5
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/65227
Reviewed-by: Julius Werner <jwerner@chromium.org>
(cherry picked from commit 100cace7abf24ac71581dd5d42286ca653b4c93c)
Conflicts:
common/chipset_gaia.c
Change-Id: I653363dd327b8daf5ae2b2f838a52791740ef06d
Reviewed-on: https://gerrit.chromium.org/gerrit/65423
Commit-Queue: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Tested-by: Randall Spangler <rspangler@chromium.org>
| -rw-r--r-- | common/chipset_gaia.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/common/chipset_gaia.c b/common/chipset_gaia.c index de773f30ce..6dcc95935c 100644 --- a/common/chipset_gaia.c +++ b/common/chipset_gaia.c @@ -343,7 +343,15 @@ void chipset_force_shutdown(void) { /* Turn off all rails */ gpio_set_level(GPIO_EN_PP3300, 0); - gpio_set_level(GPIO_EN_PP1350, 0); + + /* + * Turn off PP1350 unless we're immediately waking back up. This + * works with the hack in chipset_reset() to preserve the contents of + * RAM across a reset. + */ + if (power_request != POWER_REQ_ON) + gpio_set_level(GPIO_EN_PP1350, 0); + set_pmic_pwrok(0); gpio_set_level(GPIO_EN_PP5000, 0); } |