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| author | Matt DeVillier <matt.devillier@gmail.com> | 2022-03-28 22:40:47 -0500 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-12-21 13:40:31 +0000 |
| commit | 34ffa64ba8993b167ff3723a5aa86588b9a8e8ba (patch) | |
| tree | b21a3e0e51951bd05a842f6fb39a7d89e68ba6c0 /src/mainboard/google/octopus/variants/garg/gpio.c | |
| parent | 53bf72b131d68216b589306ab68b787a6de4c18c (diff) | |
| download | coreboot-34ffa64ba8993b167ff3723a5aa86588b9a8e8ba.tar.gz coreboot-34ffa64ba8993b167ff3723a5aa86588b9a8e8ba.tar.bz2 coreboot-34ffa64ba8993b167ff3723a5aa86588b9a8e8ba.zip | |
mb/google/octopus: Implement touchscreen/digitizer power sequencing
For octopus variants with a touchscreen/digitizer, drive the enable and
reset GPIOs high in romstage, then disable the reset GPIOs in ramstage.
Where available, only set the GPIOs for SKUs which have a touchscreen.
This will allow coreboot to detect the presence of i2c touchscreens
during ACPI SSDT generation (implemented in a subsequent commit).
TEST=tested with rest of patch train
Change-Id: Ia725b4054069c0a4f60afd7e0bca6e2fd5fdcbba
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63212
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google/octopus/variants/garg/gpio.c')
| -rw-r--r-- | src/mainboard/google/octopus/variants/garg/gpio.c | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/src/mainboard/google/octopus/variants/garg/gpio.c b/src/mainboard/google/octopus/variants/garg/gpio.c index dad442bc45d0..4f198814c644 100644 --- a/src/mainboard/google/octopus/variants/garg/gpio.c +++ b/src/mainboard/google/octopus/variants/garg/gpio.c @@ -14,9 +14,10 @@ static const struct pad_config default_override_table[] = { PAD_CFG_GPI_APIC_IOS(GPIO_137, NONE, DEEP, LEVEL, INVERT, HIZCRx1, DISPUPD), + /* GPIO_105 -- TOUCHSCREEN_RST */ + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_105, 0, DEEP, NONE, Tx1RxDCRx0, DISPUPD), /* EN_PP3300_TOUCHSCREEN */ - PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 0, DEEP, NONE, Tx0RxDCRx0, - DISPUPD), + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 1, DEEP, NONE, Tx0RxDCRx0, DISPUPD), PAD_NC(GPIO_213, DN_20K), }; @@ -35,9 +36,10 @@ static const struct pad_config hdmi_override_table[] = { PAD_CFG_GPI_APIC_IOS(GPIO_137, NONE, DEEP, LEVEL, INVERT, HIZCRx1, DISPUPD), + /* GPIO_105 -- TOUCHSCREEN_RST */ + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_105, 0, DEEP, NONE, Tx1RxDCRx0, DISPUPD), /* EN_PP3300_TOUCHSCREEN */ - PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 0, DEEP, NONE, Tx0RxDCRx0, - DISPUPD), + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 1, DEEP, NONE, Tx0RxDCRx0, DISPUPD), PAD_NC(GPIO_213, DN_20K), @@ -52,8 +54,11 @@ static const struct pad_config lte_override_table[] = { DISPUPD), /* EN_PP3300_TOUCHSCREEN */ - PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 0, DEEP, NONE, Tx0RxDCRx0, - DISPUPD), + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 1, DEEP, NONE, Tx0RxDCRx0, DISPUPD), + /* GPIO_105 -- TOUCHSCREEN_RST */ + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_105, 0, DEEP, NONE, Tx1RxDCRx0, DISPUPD), + /* GPIO_140 -- PEN_RESET */ + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_140, 0, DEEP, NONE, Tx1RxDCRx0, DISPUPD), PAD_NC(GPIO_213, DN_20K), @@ -108,3 +113,20 @@ const struct pad_config *variant_early_override_gpio_table(size_t *num) return lte_early_override_table; } + +/* GPIOs needed to be set in romstage. */ +static const struct pad_config romstage_gpio_table[] = { + /* Enable touchscreen, hold in reset */ + /* EN_PP3300_TOUCHSCREEN */ + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 1, DEEP, NONE, Tx0RxDCRx0, DISPUPD), + /* GPIO_105 -- TOUCHSCREEN_RST */ + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_105, 1, DEEP, NONE, Tx1RxDCRx0, DISPUPD), + /* GPIO_140 -- PEN_RESET */ + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_140, 1, DEEP, NONE, Tx1RxDCRx0, DISPUPD), +}; + +const struct pad_config *variant_romstage_gpio_table(size_t *num) +{ + *num = ARRAY_SIZE(romstage_gpio_table); + return romstage_gpio_table; +} |