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author | Subrata Banik <subratabanik@google.com> | 2024-02-20 20:15:20 +0530 |
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committer | Subrata Banik <subratabanik@google.com> | 2024-02-25 03:56:44 +0000 |
commit | 4bbace87aa6c239cbfea7703daaa0135467109cc (patch) | |
tree | 5b5af34c7381d46874004bdc0306747377b02533 /src/mainboard/packardbell/ms2290 | |
parent | f0277dbbe665e7af21868358b92bdfad617dcba2 (diff) |
mb/google/rex/var/rex0: Refactor SSD power sequencing
Improve SSD readiness time by enabling earlier power sequencing.
Here are the two GPIOs to look for:
* GPP_A19: Power Enable
* GPP_A20: PERST
The flow is presented as `stage (GPIO PAD/Value)` for easy
understanding:
bootblock (A20/0, A19/1)
|
v
romstage (A20/1)
Ideally, we don't need SSD power sequencing at ramstage, hence, remove
the logic from ramstage.
TEST=Able to build and boot google/rex0 using NVMe without any problems.
S0ix and read/write from/to SSD are also normal.
Change-Id: Idde2f7693771f1d7e3171e51232d1bb899bfe33e
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80641
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Diffstat (limited to 'src/mainboard/packardbell/ms2290')
0 files changed, 0 insertions, 0 deletions