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| author | Furquan Shaikh <furquan@chromium.org> | 2017-01-25 17:53:01 -0800 |
|---|---|---|
| committer | Aaron Durbin <adurbin@chromium.org> | 2017-01-29 21:07:22 +0100 |
| commit | 71d830fddc46fd22f90976f94eaaae2c390e5927 (patch) | |
| tree | 53a83242f84a3e69c0a4cc6bc287f4451818ccb4 /src/mainboard/intel/leafhill | |
| parent | 8bf53a9f4e70760622c0a2e94185bc881bca14d9 (diff) | |
| download | coreboot-71d830fddc46fd22f90976f94eaaae2c390e5927.tar.xz | |
i2c/generic: Allow GPIOs to be put in _CRS and PowerResource in ACPI
Linux kernel expects that power management with ACPI should always be
handled using PowerResource. However, some kernel drivers (e.g. ELAN
touchscreen) check to see if reset gpio is passed in by the BIOS to
decide whether the device loses power in suspend. Thus, until the kernel
has a better way for drivers to query if device lost power in suspend,
we need to allow passing in of GPIOs via _CRS as well as exporting
PowerResource to control power to the device.
Update mainboards to export reset GPIO as well as PowerResource for
ELAN touchscreen device.
BUG=chrome-os-partner:62311,chrome-os-partner:60194
BRANCH=reef
TEST=Verified that touchscreen works on power-on as well as after
suspend-resume.
Change-Id: I3409689cf56bfddd321402ad5dda3fc8762e6bc6
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/18238
Tested-by: build bot (Jenkins)
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Diffstat (limited to 'src/mainboard/intel/leafhill')
| -rw-r--r-- | src/mainboard/intel/leafhill/devicetree.cb | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/src/mainboard/intel/leafhill/devicetree.cb b/src/mainboard/intel/leafhill/devicetree.cb index 7db4f156b8..2ccf277299 100644 --- a/src/mainboard/intel/leafhill/devicetree.cb +++ b/src/mainboard/intel/leafhill/devicetree.cb @@ -177,16 +177,11 @@ chip soc/intel/apollolake register "desc" = ""ELAN Touchscreen"" register "irq" = "IRQ_EDGE_LOW(GPIO_21_IRQ)" register "probed" = "1" - register "pwr_mgmt_type" = "GPIO_EXPORT" register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_36)" - - chip drivers/generic/gpio_regulator - register "name" = ""vcc33"" - register "gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_152)" - register "enabled_on_boot" = "1" - device generic 0 on end - end - + register "reset_delay_ms" = "20" + register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_152)" + register "enable_delay_ms" = "1" + register "has_power_resource" = "1" device i2c 10 on end end end # - I2C 3 |