diff options
| author | Matt DeVillier <matt.devillier@amd.corp-partner.google.com> | 2023-01-11 17:41:37 -0600 |
|---|---|---|
| committer | Martin L Roth <gaumless@gmail.com> | 2023-01-15 02:01:48 +0000 |
| commit | 4902e9b35f1b62c2c28e582e33ad55d2543f1483 (patch) | |
| tree | ecf83ae2983dbf3318bbb2bf315eee6cc3ed903d /src/mainboard/google/reef | |
| parent | 2e6c55946c4d4ff04e1bc8de7272a4cef63ed55d (diff) | |
drivers/i2c/generic: Drop 'disable_gpio_export_in_crs' flag
Exposing the GPIOs via an ACPI PowerResource and the _CRS results in the
OS driver and ACPI thinking they own the GPIO. This can cause timing
problems because it's not clear which system should be controlling the
GPIO.
Previously, we flagged as an error any device which set the
'has_power_resource' flag but did not set 'disable_gpio_export_in_crs.'
There's no reason to require explicit disablement however, so drop the
superfluous 'disable' flag, and change the _CRS generation to check if
the GPIOs will be exported via the 'has_power_resource' flag instead.
BUG=b:265055477
TEST=build/boot skyrim, dump SSDT and verify touchscreen GPIOs only
listed under PRx, not under _CRS.
Change-Id: I837ae6c6fe4b8e1c4e10686406cba06bdb7759d2
Signed-off-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/71849
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin L Roth <gaumless@gmail.com>
Diffstat (limited to 'src/mainboard/google/reef')
| -rw-r--r-- | src/mainboard/google/reef/variants/pyro/devicetree.cb | 1 | ||||
| -rw-r--r-- | src/mainboard/google/reef/variants/snappy/devicetree.cb | 2 |
2 files changed, 0 insertions, 3 deletions
diff --git a/src/mainboard/google/reef/variants/pyro/devicetree.cb b/src/mainboard/google/reef/variants/pyro/devicetree.cb index 42adab7ed1..ee1e0f3d87 100644 --- a/src/mainboard/google/reef/variants/pyro/devicetree.cb +++ b/src/mainboard/google/reef/variants/pyro/devicetree.cb @@ -204,7 +204,6 @@ chip soc/intel/apollolake register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_152)" register "generic.enable_delay_ms" = "1" register "generic.has_power_resource" = "1" - register "generic.disable_gpio_export_in_crs" = "1" register "hid_desc_reg_offset" = "0x1" device i2c 0xA on end end diff --git a/src/mainboard/google/reef/variants/snappy/devicetree.cb b/src/mainboard/google/reef/variants/snappy/devicetree.cb index f63c808126..197c911226 100644 --- a/src/mainboard/google/reef/variants/snappy/devicetree.cb +++ b/src/mainboard/google/reef/variants/snappy/devicetree.cb @@ -245,7 +245,6 @@ chip soc/intel/apollolake register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_152)" register "generic.enable_delay_ms" = "1" register "generic.has_power_resource" = "1" - register "generic.disable_gpio_export_in_crs" = "1" register "hid_desc_reg_offset" = "0x20" device i2c 2c on end end @@ -259,7 +258,6 @@ chip soc/intel/apollolake register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPIO_152)" register "generic.enable_delay_ms" = "1" register "generic.has_power_resource" = "1" - register "generic.disable_gpio_export_in_crs" = "1" register "hid_desc_reg_offset" = "0x01" device i2c 40 on end end |