From c8d8777750d00f9a0437462a333dfec7abaf0ac0 Mon Sep 17 00:00:00 2001 From: Johnny Lin Date: Tue, 7 Jul 2020 12:15:11 +0800 Subject: mb/ocp/deltalake: Pull POST complete pin low before booting payload Delta Lake uses GPIO pin GPP_B20 for POST complete event, BIOS needs to pull this pin low for BIC (Bridge IC) to start reading sensors. Tested=On Delta Lake oBMC, bic-util slotx --get_gpio to confirm the pin is low. Change-Id: I7e05f8a7caead8ee0632af4ff60ccd8b2412b3dd Signed-off-by: Johnny Lin Reviewed-on: https://review.coreboot.org/c/coreboot/+/43162 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel Reviewed-by: Philipp Deppenwiese --- src/mainboard/ocp/deltalake/ramstage.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'src/mainboard') diff --git a/src/mainboard/ocp/deltalake/ramstage.c b/src/mainboard/ocp/deltalake/ramstage.c index 9380304c0a..88f89b5817 100644 --- a/src/mainboard/ocp/deltalake/ramstage.c +++ b/src/mainboard/ocp/deltalake/ramstage.c @@ -1,8 +1,11 @@ /* SPDX-License-Identifier: GPL-2.0-only */ #include +#include #include #include +#include +#include #include #include @@ -92,3 +95,11 @@ struct chip_operations mainboard_ops = { .enable_dev = mainboard_enable, .final = mainboard_final, }; + +static void pull_post_complete_pin(void *unused) +{ + /* Pull Low post complete pin */ + gpio_output(GPP_B20, 0); +} + +BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_BOOT, BS_ON_ENTRY, pull_post_complete_pin, NULL); -- cgit v1.2.3