u-boot/board/nvidia/seaboard/seaboard.c

/*
 *  (C) Copyright 2010,2011
 *  NVIDIA Corporation <www.nvidia.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <asm/io.h>
#include <asm/arch/tegra.h>
#include <asm/arch/clock.h>
#include <asm/arch/funcmux.h>
#include <asm/arch/gpio.h>
#include <asm/arch/pinmux.h>
#include <asm/gpio.h>

/* TODO: Remove this code when the SPI switch is working */
#if (CONFIG_MACH_TYPE != MACH_TYPE_VENTANA)
void gpio_early_init_uart(void)
{
	/* Enable UART via GPIO_PI3 (port 8, bit 3) so serial console works */
#ifndef CONFIG_SPL_BUILD
	gpio_request(GPIO_PI3, NULL);
#endif
	tegra_spl_gpio_direction_output(GPIO_PI3, 0);
}
#endif

#ifdef CONFIG_TEGRA_MMC
/*
 * Routine: pin_mux_mmc
 * Description: setup the pin muxes/tristate values for the SDMMC(s)
 */
void pin_mux_mmc(void)
{
	funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_GME_8_BIT);
	funcmux_select(PERIPH_ID_SDMMC3, FUNCMUX_SDMMC3_SDB_4BIT);

	/* For power GPIO PI6 */
	pinmux_tristate_disable(PMUX_PINGRP_ATA);
	/* For CD GPIO PI5 */
	pinmux_tristate_disable(PMUX_PINGRP_ATC);
}
#endif

void pin_mux_usb(void)
{
	/* For USB's GPIO PD0. For now, since we have no pinmux in fdt */
	pinmux_tristate_disable(PMUX_PINGRP_SLXK);
}