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