Shelley Chen has uploaded this change for review. ( https://review.coreboot.org/26725
Change subject: mb/google/poppy/variants/nami: Add delay to enable_gpio during Elan power on ......................................................................
mb/google/poppy/variants/nami: Add delay to enable_gpio during Elan power on
During measurement of signals during Elan touchscreen power on, saw that the enable_gpio delay was not sufficient as there is a +1.5 ms delay during power on. Adding more delay to take this into account.
BUG=b:78311818 BRANCH=None TEST=probe power on signals to ensure meet timing requirements
Change-Id: Id661a202188a97aef97514ebecd0be6fc022d21e Signed-off-by: Shelley Chen shchen@google.com --- M src/mainboard/google/poppy/variants/nami/devicetree.cb 1 file changed, 1 insertion(+), 1 deletion(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/25/26725/1
diff --git a/src/mainboard/google/poppy/variants/nami/devicetree.cb b/src/mainboard/google/poppy/variants/nami/devicetree.cb index 5e2575f..9c4b694 100644 --- a/src/mainboard/google/poppy/variants/nami/devicetree.cb +++ b/src/mainboard/google/poppy/variants/nami/devicetree.cb @@ -296,7 +296,7 @@ register "reset_delay_ms" = "20" register "reset_off_delay_ms" = "2" register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_B4)" - register "enable_delay_ms" = "1" + register "enable_delay_ms" = "5" register "enable_off_delay_ms" = "100" register "has_power_resource" = "1" register "stop_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_C3)"