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| author | Diana Z <dzigterman@chromium.org> | 2022-02-01 14:53:22 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2022-02-07 18:54:04 +0000 |
| commit | c0e350a226b41a48b78c1b0f7743c4b8ef9c5d91 (patch) | |
| tree | 14be05c443f5f05418e6f7b5e2b6cad92edba830 /power | |
| parent | 90cd4033ccb514a60a9476e4bbb469e9cb6c6cfa (diff) | |
| download | chrome-ec-c0e350a226b41a48b78c1b0f7743c4b8ef9c5d91.tar.gz | |
AMD: Add fake S0 support
Add in support for a fake S0 state. Since we rely on the SoC SLP
signals to sequence, we can encourage sequencing through just turning
these GPIOs into outputs and setting them. Disable the forced power
sequencing by setting them to inputs again.
BRANCH=None
BUG=b:209613841
TEST=make buildall
Signed-off-by: Diana Z <dzigterman@chromium.org>
Change-Id: I30a07b9accdd5632fa303e05ac12201f3f86cfb2
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3430301
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Diffstat (limited to 'power')
| -rw-r--r-- | power/amd_x86.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/power/amd_x86.c b/power/amd_x86.c index ae3367e227..c62663e9e9 100644 --- a/power/amd_x86.c +++ b/power/amd_x86.c @@ -30,6 +30,23 @@ static int forcing_shutdown; /* Forced shutdown in progress? */ +#ifdef CONFIG_POWERSEQ_FAKE_CONTROL +/* Create fake power states through forcing the SoC SLP signal sequencing */ +void power_fake_s0(void) +{ + /* Change the SLP signals to output and drive them */ + gpio_set_flags(GPIO_PCH_SLP_S5_L, GPIO_OUT_HIGH); + gpio_set_flags(GPIO_PCH_SLP_S3_L, GPIO_OUT_HIGH); +} + +void power_fake_disable(void) +{ + /* Pins back to inputs */ + gpio_set_flags(GPIO_PCH_SLP_S5_L, GPIO_INPUT); + gpio_set_flags(GPIO_PCH_SLP_S3_L, GPIO_INPUT); +} +#endif /* defined(CONFIG_POWERSEQ_FAKE_CONTROL) */ + void chipset_force_shutdown(enum chipset_shutdown_reason reason) { CPRINTS("%s()", __func__); |