diff options
| author | Matt DeVillier <matt.devillier@gmail.com> | 2022-03-28 23:19:45 -0500 |
|---|---|---|
| committer | Martin L Roth <gaumless@gmail.com> | 2022-12-23 00:19:06 +0000 |
| commit | 525c61f74e94c1dbdf4b54ac8157d950695fc03f (patch) | |
| tree | e3c51077d96a7d740a852fbd93c993c61502a1c6 /src/mainboard/google/hatch/variants/akemi | |
| parent | c0edb925e67b946320dbdfe1a68c4f19ca161d6e (diff) | |
mb/google/hatch: Implement touchscreen power sequencing
For touchscreens on hatch variants, drive the enable GPIO high starting
in romstage, then disable the reset GPIO in ramstage. This will allow
coreboot to detect the presence of i2c touchscreens during ACPI SSDT
generation (implemented in a subsequent commit).
BUG=b:121309055
TEST=tested with rest of patch train
Change-Id: I86c5f41b7820eaf5252c276ae854a4206e09385f
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71059
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google/hatch/variants/akemi')
| -rw-r--r-- | src/mainboard/google/hatch/variants/akemi/gpio.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/mainboard/google/hatch/variants/akemi/gpio.c b/src/mainboard/google/hatch/variants/akemi/gpio.c index fb1e99c7f4..1057611deb 100644 --- a/src/mainboard/google/hatch/variants/akemi/gpio.c +++ b/src/mainboard/google/hatch/variants/akemi/gpio.c @@ -22,6 +22,10 @@ static const struct pad_config ssd_sku_gpio_table[] = { PAD_NC(GPP_B22, NONE), /* C11 : NC */ PAD_NC(GPP_C11, NONE), + /* D9 : EN_PP3300_DX_TOUCHSCREEN */ + PAD_CFG_GPO(GPP_D9, 1, DEEP), + /* D15 : TOUCHSCREEN_RST_L */ + PAD_CFG_GPO(GPP_D15, 1, DEEP), /* F1 : NC */ PAD_NC(GPP_F1, NONE), /* F3 : MEM_STRAP_3 */ @@ -79,6 +83,10 @@ static const struct pad_config gpio_table[] = { PAD_NC(GPP_B22, NONE), /* C11 : NC */ PAD_NC(GPP_C11, NONE), + /* D9 : EN_PP3300_DX_TOUCHSCREEN */ + PAD_CFG_GPO(GPP_D9, 1, DEEP), + /* D15 : TOUCHSCREEN_RST_L */ + PAD_CFG_GPO(GPP_D15, 1, DEEP), /* F1 : NC */ PAD_NC(GPP_F1, NONE), /* F3 : MEM_STRAP_3 */ @@ -178,3 +186,18 @@ const struct pad_config *variant_early_gpio_table(size_t *num) *num = ARRAY_SIZE(early_gpio_table); return early_gpio_table; } + +/* GPIOs needed to be set in romstage. */ +static const struct pad_config romstage_gpio_table[] = { + /* Enable touchscreen, hold in reset */ + /* D9 : EN_PP3300_DX_TOUCHSCREEN */ + PAD_CFG_GPO(GPP_D9, 1, DEEP), + /* D15 : TOUCHSCREEN_RST_L */ + PAD_CFG_GPO(GPP_D15, 0, DEEP), +}; + +const struct pad_config *variant_romstage_gpio_table(size_t *num) +{ + *num = ARRAY_SIZE(romstage_gpio_table); + return romstage_gpio_table; +} |