| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2019 Google LLC |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #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); |
| } |