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mb/google/nissa/var/craaskov: Implement touchscreen power sequencing 

For brya variants with a touchscreen, drive the enable GPIO high
starting in romstage while holding in reset, then disable the reset
GPIO in ramstage (done in the baseboard).

BUG=b:317746281
TEST=emerge-nissa coreboot chromeos-bootimage

Change-Id: I3ca2e2d12a86eaae9e37870a2541c0287e354690
Signed-off-by: Rex Chou <rex_chou@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79764
Reviewed-by: Dtrain Hsu <dtrain_hsu@compal.corp-partner.google.com>
Reviewed-by: Ian Feng <ian_feng@compal.corp-partner.google.com>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Eric Lai <ericllai@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
rex_chou 2023-12-29 14:14:38 +08:00 committed by Felix Held
parent afed45dbaa
commit 3526b9fcaf
2 changed files with 16 additions and 0 deletions
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2
src/mainboard/google/brya/variants/craaskov/Makefile.inc
View File

@ -1,6 +1,8 @@
# SPDX-License-Identifier: GPL-2.0-or-later # SPDX-License-Identifier: GPL-2.0-or-later
bootblock-y += gpio.c bootblock-y += gpio.c
romstage-y += gpio.c
ramstage-y += gpio.c ramstage-y += gpio.c
ramstage-y += variant.c ramstage-y += variant.c
ramstage-$(CONFIG_FW_CONFIG) += fw_config.c ramstage-$(CONFIG_FW_CONFIG) += fw_config.c

14
src/mainboard/google/brya/variants/craaskov/gpio.c
View File

@ -63,6 +63,14 @@ static const struct pad_config early_gpio_table[] = {
PAD_CFG_NF(GPP_H11, NONE, DEEP, NF2), PAD_CFG_NF(GPP_H11, NONE, DEEP, NF2),
}; };
static const struct pad_config romstage_gpio_table[] = {
/* Enable touchscreen, hold in reset */
/* C0 : SMBCLK ==> EN_PP3300_TCHSCR */
PAD_CFG_GPO(GPP_C0, 1, DEEP),
/* C1 : SMBDATA ==> USI_RST_L */
PAD_CFG_GPO(GPP_C1, 0, DEEP),
};
const struct pad_config *variant_gpio_override_table(size_t *num) const struct pad_config *variant_gpio_override_table(size_t *num)
{ {
*num = ARRAY_SIZE(override_gpio_table); *num = ARRAY_SIZE(override_gpio_table);
@ -74,3 +82,9 @@ const struct pad_config *variant_early_gpio_table(size_t *num)
*num = ARRAY_SIZE(early_gpio_table); *num = ARRAY_SIZE(early_gpio_table);
return early_gpio_table; return early_gpio_table;
} }
const struct pad_config *variant_romstage_gpio_table(size_t *num)
{
*num = ARRAY_SIZE(romstage_gpio_table);
return romstage_gpio_table;
}