src/mainboard/google/hatch/variants/mushu/ramstage.c


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/*
 * This file is part of the coreboot project.
 *
 * Copyright 2020 The coreboot project Authors.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include <delay.h>
#include <gpio.h>
#include <baseboard/variants.h>
#include <soc/gpio.h>

void variant_ramstage_init(void)
{
	/*
	 * Enable power to FPMCU, wait for power rail to stabilize,
	 * and then deassert FPMCU reset.
	 * Waiting for the power rail to stabilize can take a while,
	 * a minimum of 400us on Kohaku.
	 */
	gpio_output(GPP_C11, 1);
	mdelay(1);
	gpio_output(GPP_A12, 1);
}