diff options
| 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/ampton/gpio.c | |
| parent | 53bf72b131d68216b589306ab68b787a6de4c18c (diff) | |
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/ampton/gpio.c')
| -rw-r--r-- | src/mainboard/google/octopus/variants/ampton/gpio.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/mainboard/google/octopus/variants/ampton/gpio.c b/src/mainboard/google/octopus/variants/ampton/gpio.c index 4c4c3d661c..c67dc255f1 100644 --- a/src/mainboard/google/octopus/variants/ampton/gpio.c +++ b/src/mainboard/google/octopus/variants/ampton/gpio.c @@ -53,13 +53,14 @@ static const struct pad_config variant_override_table[] = { /* LPSS */ PAD_CFG_GPIO_HI_Z(GPIO_81, UP_20K, DEEP, HIZCRx0, DISPUPD), /* GPIO_81_DEBUG (Boot halt) -- MIPI60 DEBUG */ PAD_NC(GPIO_84, NONE), /* LPSS_SPI_2_CLK - unused */ + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_105, 0, DEEP, NONE, Tx1RxDCRx0, DISPUPD),/* GPIO_105 -- TOUCHSCREEN_RST */ PAD_CFG_GPI_APIC_IOS(GPIO_137, NONE, DEEP, EDGE_BOTH, INVERT, HIZCRx1, DISPUPD),/* GPIO_137 -- HP_INT_ODL */ PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_140, 0, DEEP, NONE, Tx1RxDCRx0, DISPUPD),/* GPIO_140 -- PEN_RESET */ PAD_NC(GPIO_143, UP_20K), /* GPIO_143 - NC */ PAD_NC(GPIO_144, UP_20K), /* GPIO_144 - PEN_EJECT */ PAD_NC(GPIO_145, UP_20K), /* GPIO_145 - PEN_EJECT */ - PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 0, DEEP, NONE, Tx0RxDCRx0, DISPUPD), /* EN_PP3300_TOUCHSCREEN */ + PAD_CFG_GPO_IOSSTATE_IOSTERM(GPIO_146, 1, DEEP, NONE, Tx0RxDCRx0, DISPUPD), /* EN_PP3300_TOUCHSCREEN */ /* AUDIO COMMUNITY GPIOS*/ PAD_NC(GPIO_157, DN_20K),/* AVS_I2S0_BCLK -- unused */ @@ -115,3 +116,20 @@ 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 */ + /* 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; +} |