LXR uboot/board/avionic-design/common/tamonten-ng.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2013
   4 * Avionic Design GmbH <www.avionic-design.de>
   5 */
   6
   7#include <common.h>
   8#include <dm.h>
   9#include <log.h>
  10#include <asm/arch/pinmux.h>
  11#include <asm/arch/gp_padctrl.h>
  12#include <asm/arch/gpio.h>
  13#include <asm/gpio.h>
  14#include "pinmux-config-tamonten-ng.h"
  15#include <i2c.h>
  16
  17#define PMU_I2C_ADDRESS         0x2D
  18
  19#define PMU_REG_LDO5            0x32
  20
  21#define PMU_REG_LDO_HIGH_POWER  1
  22
  23/* Voltage selection for the LDOs with 100mV resolution */
  24#define PMU_REG_LDO_SEL_100(mV) ((((mV - 1000) / 100) + 2) << 2)
  25
  26#define PMU_REG_LDO_100(st, mV) (PMU_REG_LDO_##st | PMU_REG_LDO_SEL_100(mV))
  27
  28#define PMU_LDO5(st, mV)        PMU_REG_LDO_100(st, mV)
  29
  30void pinmux_init(void)
  31{
  32        pinmux_config_pingrp_table(tamonten_ng_pinmux_common,
  33                ARRAY_SIZE(tamonten_ng_pinmux_common));
  34        pinmux_config_pingrp_table(unused_pins_lowpower,
  35                ARRAY_SIZE(unused_pins_lowpower));
  36
  37        /* Initialize any non-default pad configs (APB_MISC_GP regs) */
  38        pinmux_config_drvgrp_table(tamonten_ng_padctrl,
  39                ARRAY_SIZE(tamonten_ng_padctrl));
  40}
  41
  42void gpio_early_init(void)
  43{
  44        /* Turn on the alive signal */
  45        gpio_request(TEGRA_GPIO(V, 2), "ALIVE");
  46        gpio_direction_output(TEGRA_GPIO(V, 2), 1);
  47
  48        /* Remove the reset on the external periph */
  49        gpio_request(TEGRA_GPIO(I, 4), "nRST_PERIPH");
  50        gpio_direction_output(TEGRA_GPIO(I, 4), 1);
  51}
  52
  53void pmu_write(uchar reg, uchar data)
  54{
  55        struct udevice *dev;
  56        int ret;
  57
  58        ret = i2c_get_chip_for_busnum(4, PMU_I2C_ADDRESS, 1, &dev);
  59        if (ret) {
  60                debug("%s: Cannot find PMIC I2C chip\n", __func__);
  61                return;
  62        }
  63        dm_i2c_write(dev, reg, &data, 1);
  64}
  65
  66/*
  67 * Do I2C/PMU writes to bring up SD card bus power
  68 *
  69 */
  70void board_sdmmc_voltage_init(void)
  71{
  72        /* Enable LDO5 with 3.3v for SDMMC3 */
  73        pmu_write(PMU_REG_LDO5, PMU_LDO5(HIGH_POWER, 3300));
  74
  75        /* Switch the power on */
  76        gpio_request(TEGRA_GPIO(J, 2), "EN_3V3_EMMC");
  77        gpio_direction_output(TEGRA_GPIO(J, 2), 1);
  78}
  79
  80/*
  81 * Routine: pin_mux_mmc
  82 * Description: setup the MMC muxes, power rails, etc.
  83 */
  84void pin_mux_mmc(void)
  85{
  86        /*
  87         * NOTE: We don't do mmc-specific pin muxes here.
  88         * They were done globally in pinmux_init().
  89         */
  90
  91        /* Bring up the SDIO1 power rail */
  92        board_sdmmc_voltage_init();
  93}
  94