diff options
| author | Subrata Banik <subratabanik@google.com> | 2024-02-20 20:19:13 +0530 |
|---|---|---|
| committer | Subrata Banik <subratabanik@google.com> | 2024-02-25 03:57:10 +0000 |
| commit | 259fc2b1190f23af085773a23a9c79209d3394c4 (patch) | |
| tree | b3ab18849a2a1ed0692e1ad4d7274fdb95ca8f6d /src/mainboard/google/rex | |
| parent | 9305ccada13986d21ffaf874507f2d811d1ebe7b (diff) | |
mb/google/rex/var/deku: 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/deku using NVMe without any problems.
S0ix and read/write from/to SSD are also normal.
Change-Id: Iedaff8a793f1ba5d2b97352b95c4dfdd2b818ebd
Signed-off-by: Subrata Banik <subratabanik@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80664
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google/rex')
| -rw-r--r-- | src/mainboard/google/rex/variants/deku/gpio.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/src/mainboard/google/rex/variants/deku/gpio.c b/src/mainboard/google/rex/variants/deku/gpio.c index ba5bc1780c..9aa5900941 100644 --- a/src/mainboard/google/rex/variants/deku/gpio.c +++ b/src/mainboard/google/rex/variants/deku/gpio.c @@ -38,10 +38,6 @@ static const struct pad_config gpio_table[] = { PAD_CFG_GPI_APIC_LOCK(GPP_A17, NONE, LEVEL, INVERT, LOCK_CONFIG), /* GPP_A18 : net NC is not present in the given design */ PAD_NC(GPP_A18, NONE), - /* GPP_A19 : [] ==> EN_PWR_SSD_OD */ - PAD_CFG_GPO(GPP_A19, 1, DEEP), - /* GPP_A20 : [] ==> SSD_PERST_L */ - PAD_CFG_GPO_LOCK(GPP_A20, 1, LOCK_CONFIG), /* GPP_A21 : [] ==> SOC_GPP_A21 */ PAD_NC(GPP_A21, NONE), @@ -395,17 +391,20 @@ static const struct pad_config early_gpio_table[] = { PAD_CFG_NF(GPP_H09, NONE, DEEP, NF1), /* GPP_H10 : [] ==> SOC_WP_OD */ PAD_CFG_GPI_GPIO_DRIVER_LOCK(GPP_H10, NONE, LOCK_CONFIG), + + /* GPP_A19 : [] ==> EN_PP3300_SSD */ + PAD_CFG_GPO(GPP_A19, 1, DEEP), }; static const struct pad_config romstage_gpio_table[] = { - /* GPP_A20 : [] ==> SSD_PERST_L */ - PAD_CFG_GPO(GPP_A20, 0, DEEP), - /* GPP_C13 : [] ==> LAN0_PERST_L */ PAD_CFG_GPO(GPP_C13, 0, DEEP), /* GPP_D02 : [] ==> LAN1_PERST_L */ PAD_CFG_GPO(GPP_D02, 0, DEEP), + + /* GPP_A20 : [] ==> SSD_PERST_L */ + PAD_CFG_GPO(GPP_A20, 1, DEEP), }; const struct pad_config *variant_gpio_table(size_t *num) |