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mb/google/galdos/var/lars: Implement touchscreen power sequencing 

Since lars has two touchscreen options, we need to determine which (if
any) are present on a given device at runtime so that there are not
multiple ACPI touchscreen devices (as it makes Windows unhappy).
Implement power sequencing and runtime detection for both touchscreen
options.

TEST=build/boot Win11/Linux on google/lars, verify touchscreen detected
and functional under both OSes.

Change-Id: I49ccb29ec4589315a4abe3c0ea8fa76f97080bcd
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79311
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <ericllai@google.com>
This commit is contained in:
Matt DeVillier 2023-11-28 09:22:39 -06:00 committed by Felix Held
parent 0733ee6514
commit 22ac6f6b2c
2 changed files with 16 additions and 0 deletions
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4
src/mainboard/google/glados/variants/lars/include/variant/gpio.h
View File

@ -216,6 +216,10 @@ static const struct pad_config early_gpio_table[] = {
/* GD_UART2_RXD */ PAD_CFG_NF(GPP_C20, NONE, DEEP, NF1),
/* GD_UART2_TXD */ PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
/* EC_IN_RW */ PAD_CFG_GPI_GPIO_DRIVER(GPP_C6, NONE, DEEP),
/* touchscreen enable, hold in reset */
/* TCH_PNL_PWREN */ PAD_CFG_GPO(GPP_C22, 1, DEEP),
/* TCH_PNL_RST */ PAD_CFG_GPO(GPP_E23, 0, DEEP),
};
#endif

12
src/mainboard/google/glados/variants/lars/overridetree.cb
View File

@ -18,12 +18,24 @@ chip soc/intel/skylake
register "hid" = ""ELAN0001""
register "desc" = ""ELAN Touchscreen""
register "irq" = "ACPI_IRQ_EDGE_LOW(GPP_E7_IRQ)"
register "detect" = "1"
register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_E7)"
register "reset_delay_ms" = "20"
register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_E23)"
register "enable_delay_ms" = "1"
register "has_power_resource" = "1"
device i2c 10 on end
end
chip drivers/i2c/generic
register "hid" = ""MLFS0000""
register "desc" = ""Melfas Touchscreen""
register "irq" = "ACPI_IRQ_EDGE_LOW(GPP_E7_IRQ)"
register "detect" = "1"
register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_E7)"
register "reset_delay_ms" = "10"
register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_E23)"
register "enable_delay_ms" = "55"
register "has_power_resource" = "1"
device i2c 34 on end
end
end