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mainboard/google/poppy: Add PowerResource for touchscreen device 

1. Do not enable touchscreen device by default in gpio configuration.
2. Select use of PowerResource for touchscreen device in devicetree so
that the ACPI subsystem can take care of powering on/off the
device. When system enters suspend, touchscreen device is powered off
and on resume, it is powered back on.

BUG=b:62028489
TEST=Verified 100 cycles of suspend-resume. Touchscreen still works on
poppy.

Change-Id: Ia0bebc7259b10cc60a9fa5b53542dfdd9685663e
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/19829
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Furquan Shaikh 2017-05-23 11:56:09 -07:00 committed by Furquan Shaikh
parent 04edaefad7
commit 73108ded48
3 changed files with 9 additions and 1 deletions
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4
src/mainboard/google/poppy/variants/baseboard/devicetree.cb
View File

@ -210,6 +210,10 @@ chip soc/intel/skylake
register "desc" = ""Atmel Touchscreen""
register "irq" = "ACPI_IRQ_LEVEL_LOW(GPP_E7_IRQ)"
register "probed" = "1"
register "has_power_resource" = "1"
register "disable_gpio_export_in_crs" = "1"
register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C22)"
register "enable_delay_ms" = "250"
device i2c 4b on end
end
end # I2C #0

2
src/mainboard/google/poppy/variants/baseboard/gpio.c
View File

@ -174,7 +174,7 @@ static const struct pad_config gpio_table[] = {
/* C21 : UART2_TXD ==> PCHTX_SERVORX_UART */
PAD_CFG_NF(GPP_C21, NONE, DEEP, NF1),
/* C22 : UART2_RTS# ==> EN_PP3300_DX_TOUCHSCREEN */
PAD_CFG_GPO(GPP_C22, 1, DEEP),
PAD_CFG_GPO(GPP_C22, 0, DEEP),
/* C23 : UART2_CTS# ==> PCH_WP */
PAD_CFG_GPI(GPP_C23, 20K_PU, DEEP),

4
src/mainboard/google/poppy/variants/soraka/devicetree.cb
View File

@ -210,6 +210,10 @@ chip soc/intel/skylake
register "desc" = ""Atmel Touchscreen""
register "irq" = "ACPI_IRQ_LEVEL_LOW(GPP_E7_IRQ)"
register "probed" = "1"
register "has_power_resource" = "1"
register "disable_gpio_export_in_crs" = "1"
register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_C22)"
register "enable_delay_ms" = "250"
device i2c 4b on end
end
end # I2C #0