mb/google/rex/var/screebo: Add delay 1ms after Main 3V3
when S0ix returns S0, PERST needs to delay until
Main 3V3 is stable and then pull up
BUG=b:313976507
TEST=emerge-rex coreboot,measurement waveform verify pass
Change-Id: I33a86e52fab3c5c8cba6ebed0cbdd1b88b6538b0
Signed-off-by: Kun Liu <liukun11@huaqin.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79320
Reviewed-by: Rui Zhou <zhourui@huaqin.corp-partner.google.com>
Reviewed-by: Subrata Banik <subratabanik@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/google/rex/variants/screebo/overridetree.cb b/src/mainboard/google/rex/variants/screebo/overridetree.cb
index f6b32db..86bd74d 100644
--- a/src/mainboard/google/rex/variants/screebo/overridetree.cb
+++ b/src/mainboard/google/rex/variants/screebo/overridetree.cb
@@ -289,6 +289,7 @@
chip soc/intel/common/block/pcie/rtd3
register "enable_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_HIGH(GPP_D03)"
register "reset_gpio" = "ACPI_GPIO_OUTPUT_ACTIVE_LOW(GPP_D02)"
+ register "enable_delay_ms" = "1"
register "srcclk_pin" = "6"
device generic 0 on
probe DB_SD SD_GL9750