diff options
| author | Johnny Lin <johnny_lin@wiwynn.com> | 2020-07-07 12:15:11 +0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-07-12 19:39:05 +0000 |
| commit | c8d8777750d00f9a0437462a333dfec7abaf0ac0 (patch) | |
| tree | 4de4360771251786ae12b785dd2a159fe53b6b63 /src/mainboard/ocp | |
| parent | 86acc04d2874fb9ef00408a4b96d496030a95eb1 (diff) | |
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 <johnny_lin@wiwynn.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43162
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Diffstat (limited to 'src/mainboard/ocp')
| -rw-r--r-- | src/mainboard/ocp/deltalake/ramstage.c | 11 |
1 files changed, 11 insertions, 0 deletions
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 <console/console.h> +#include <bootstate.h> #include <drivers/ipmi/ipmi_ops.h> #include <drivers/ocp/dmi/ocp_dmi.h> +#include <gpio.h> +#include <soc/lewisburg_pch_gpio_defs.h> #include <soc/ramstage.h> #include <stdio.h> @@ -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); |