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https://github.com/AsahiLinux/u-boot
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25ab4b0303
Rather than assuming that the chip offset length is 1, allow it to be provided. This allows chips that don't use the default offset length to be used (at present they are only supported by the command line 'i2c' command which sets the offset length explicitly). Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
/*
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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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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <dm.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(GPIO_PV2, "ALIVE");
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gpio_direction_output(GPIO_PV2, 1);
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/* Remove the reset on the external periph */
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gpio_request(GPIO_PI4, "nRST_PERIPH");
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gpio_direction_output(GPIO_PI4, 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(GPIO_PJ2, "EN_3V3_EMMC");
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gpio_direction_output(GPIO_PJ2, 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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