diff options
| author | Caveh Jalali <caveh@chromium.org> | 2020-08-06 00:55:40 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-08-17 06:39:23 +0000 |
| commit | eb9337c9cc2fd5432d79509174efdcf6bbcf9a01 (patch) | |
| tree | 68f0dba88f6bfd9076f52a7c4e03b90099c541f2 /src/mainboard/google/volteer/variants/volteer2/overridetree.cb | |
| parent | ac66bda47c2006e0dea02ad988572e35e98b80ff (diff) | |
mb/google/volteer: Define stop_gpio for goodix touch screen
This applies to the goodix touch screen on both the volteer and
volteer2 variants: Define GPP_E3 as the stop_gpio for the touch screen
"Report_Switch" signal. Goodix defines a 1ms (minimum) delay after
stop off. In addition, no longer drive this GPIO high by default as it
is now controlled by the kernel through ACPI.
BUG=b:153705232
TEST=touch screen still functional on volteer; confirmed timings with
scope (VDD, RESET, REPORT_SWITCH)
Change-Id: I3ead9cf79812d08c4917be4585ed273050465a9b
Signed-off-by: Caveh Jalali <caveh@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44356
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Diffstat (limited to 'src/mainboard/google/volteer/variants/volteer2/overridetree.cb')
| -rw-r--r-- | src/mainboard/google/volteer/variants/volteer2/overridetree.cb | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb index 62749fc96d..fefe9ba6a7 100644 --- a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb +++ b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb @@ -45,10 +45,16 @@ chip soc/intel/tigerlake register "generic.probed" = "1" register "generic.reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C10)" + # Parameter T3 >= 10ms register "generic.reset_delay_ms" = "120" + # Parameter T2 >= 1ms register "generic.reset_off_delay_ms" = "3" register "generic.enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_A8)" + # Parameter T1 >= 10ms register "generic.enable_delay_ms" = "12" + register "generic.stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_E3)" + # Parameter T4 >= 1ms + register "generic.stop_off_delay_ms" = "1" register "generic.has_power_resource" = "1" register "hid_desc_reg_offset" = "0x01" device i2c 14 on end |