u-boot/board/rockchip/evb_rk3399/evb-rk3399.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2016 Rockchip Electronics Co., Ltd
 */

#include <common.h>
#include <dm.h>
#include <dm/pinctrl.h>
#include <dm/uclass-internal.h>
#include <asm/arch-rockchip/periph.h>
#include <power/regulator.h>
#include <spl.h>

int board_init(void)
{
	struct udevice *pinctrl, *regulator;
	int ret;

	/*
	 * The PWM do not have decicated interrupt number in dts and can
	 * not get periph_id by pinctrl framework, so let's init them here.
	 * The PWM2 and PWM3 are for pwm regulater.
	 */
	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
	if (ret) {
		debug("%s: Cannot find pinctrl device\n", __func__);
		goto out;
	}

	/* Enable pwm0 for panel backlight */
	ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_PWM0);
	if (ret) {
		debug("%s PWM0 pinctrl init fail! (ret=%d)\n", __func__, ret);
		goto out;
	}

	ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_PWM2);
	if (ret) {
		debug("%s PWM2 pinctrl init fail!\n", __func__);
		goto out;
	}

	ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_PWM3);
	if (ret) {
		debug("%s PWM3 pinctrl init fail!\n", __func__);
		goto out;
	}

	ret = regulators_enable_boot_on(false);
	if (ret)
		debug("%s: Cannot enable boot on regulator\n", __func__);

	ret = regulator_get_by_platname("vcc5v0_host", &regulator);
	if (ret) {
		debug("%s vcc5v0_host init fail! ret %d\n", __func__, ret);
		goto out;
	}

	ret = regulator_set_enable(regulator, true);
	if (ret) {
		debug("%s vcc5v0-host-en set fail!\n", __func__);
		goto out;
	}

out:
	return 0;
}

void spl_board_init(void)
{
	struct udevice *pinctrl;
	int ret;

	ret = uclass_get_device(UCLASS_PINCTRL, 0, &pinctrl);
	if (ret) {
		debug("%s: Cannot find pinctrl device\n", __func__);
		goto err;
	}

	/* Enable debug UART */
	ret = pinctrl_request_noflags(pinctrl, PERIPH_ID_UART_DBG);
	if (ret) {
		debug("%s: Failed to set up console UART\n", __func__);
		goto err;
	}

	preloader_console_init();
	return;
err:
	printf("%s: Error %d\n", __func__, ret);

	/* No way to report error here */
	hang();
}