ramstage.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#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);
}