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authorFurquan Shaikh <furquan@chromium.org>2016-12-12 09:23:01 -0800
committerMartin Roth <martinroth@google.com>2016-12-16 18:26:22 +0100
commit98915bb7a9ab696b3facf9a2fff3525ebb87531f (patch)
tree41f3104d59e746a537dfcc9093c086fc9f7a6e79 /src/mainboard/google/reef
parentc804826be9b528b53fa9d6842f5c4489d7eff924 (diff)
drivers/i2c/generic: Allow mainboards to export reset and enable GPIOs
Add power management type config option that allows mainboards to either: 1. Define a power resource that uses the reset and enable gpios to power on and off the device using _ON and _OFF methods, or 2. Export reset and enable GPIOs in _CRS and _DSD so that the OS can directly toggle the GPIOs as required. GPIO type needs to be updated in drivers_i2c_generic_config to use acpi_gpio type so that it can be used for both the above cases. BUG=chrome-os-partner:60194 BRANCH=None TEST=Verified that elan touchscreen works fine on reef using exported GPIOs. Change-Id: I4d76f193f615cfc4520869dedc55505c109042f6 Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17797 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Diffstat (limited to 'src/mainboard/google/reef')
-rw-r--r--src/mainboard/google/reef/variants/baseboard/devicetree.cb7
1 files changed, 3 insertions, 4 deletions
diff --git a/src/mainboard/google/reef/variants/baseboard/devicetree.cb b/src/mainboard/google/reef/variants/baseboard/devicetree.cb
index 49c1ba65d6..1d9dcbb624 100644
--- a/src/mainboard/google/reef/variants/baseboard/devicetree.cb
+++ b/src/mainboard/google/reef/variants/baseboard/devicetree.cb
@@ -177,10 +177,9 @@ chip soc/intel/apollolake
register "desc" = ""ELAN Touchscreen""
register "irq" = "IRQ_EDGE_LOW(GPIO_21_IRQ)"
register "probed" = "1"
- register "reset_gpio" = "GPIO_36"
- register "reset_delay_ms" = "20"
- register "enable_gpio" = "GPIO_152"
- register "enable_delay_ms" = "1"
+ register "pwr_mgmt_type" = "GPIO_EXPORT"
+ register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_36)"
+ register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_152)"
device i2c 10 on end
end
end # - I2C 3