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/*
* (C) Copyright 2013
* Avionic Design GmbH <www.avionic-design.de>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <asm/arch/pinmux.h>
#include <asm/arch/gp_padctrl.h>
#include <asm/arch/gpio.h>
#include <asm/gpio.h>
#include "pinmux-config-tamonten-ng.h"
#include <i2c.h>
#define PMU_I2C_ADDRESS 0x2D
#define PMU_REG_LDO5 0x32
#define PMU_REG_LDO_HIGH_POWER 1
/* Voltage selection for the LDOs with 100mV resolution */
#define PMU_REG_LDO_SEL_100(mV) ((((mV - 1000) / 100) + 2) << 2)
#define PMU_REG_LDO_100(st, mV) (PMU_REG_LDO_##st | PMU_REG_LDO_SEL_100(mV))
#define PMU_LDO5(st, mV) PMU_REG_LDO_100(st, mV)
void pinmux_init(void)
{
pinmux_config_pingrp_table(tamonten_ng_pinmux_common,
ARRAY_SIZE(tamonten_ng_pinmux_common));
pinmux_config_pingrp_table(unused_pins_lowpower,
ARRAY_SIZE(unused_pins_lowpower));
/* Initialize any non-default pad configs (APB_MISC_GP regs) */
pinmux_config_drvgrp_table(tamonten_ng_padctrl,
ARRAY_SIZE(tamonten_ng_padctrl));
}
void gpio_early_init(void)
{
/* Turn on the alive signal */
gpio_request(TEGRA_GPIO(V, 2), "ALIVE");
gpio_direction_output(TEGRA_GPIO(V, 2), 1);
/* Remove the reset on the external periph */
gpio_request(TEGRA_GPIO(I, 4), "nRST_PERIPH");
gpio_direction_output(TEGRA_GPIO(I, 4), 1);
}
void pmu_write(uchar reg, uchar data)
{
struct udevice *dev;
int ret;
ret = i2c_get_chip_for_busnum(4, PMU_I2C_ADDRESS, 1, &dev);
if (ret) {
debug("%s: Cannot find PMIC I2C chip\n", __func__);
return;
}
dm_i2c_write(dev, reg, &data, 1);
}
/*
* Do I2C/PMU writes to bring up SD card bus power
*
*/
void board_sdmmc_voltage_init(void)
{
/* Enable LDO5 with 3.3v for SDMMC3 */
pmu_write(PMU_REG_LDO5, PMU_LDO5(HIGH_POWER, 3300));
/* Switch the power on */
gpio_request(TEGRA_GPIO(J, 2), "EN_3V3_EMMC");
gpio_direction_output(TEGRA_GPIO(J, 2), 1);
}
/*
* Routine: pin_mux_mmc
* Description: setup the MMC muxes, power rails, etc.
*/
void pin_mux_mmc(void)
{
/*
* NOTE: We don't do mmc-specific pin muxes here.
* They were done globally in pinmux_init().
*/
/* Bring up the SDIO1 power rail */
board_sdmmc_voltage_init();
}
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