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https://github.com/brain-hackers/u-boot-brain
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45d85f0872
Now that clock and reset drivers exist for Tegra186, we can enable the SD card controller. Now that a BPMP I2C driver exists for Tegra186, we can communicate with the PMIC to enable power to the SD card. Hook up the DT content and board code required to make the SD card work. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Tom Warren <twarren@nvidia.com>
34 lines
754 B
C
34 lines
754 B
C
/*
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* Copyright (c) 2016, NVIDIA CORPORATION
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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 <i2c.h>
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#include "../p2571/max77620_init.h"
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int tegra_board_init(void)
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{
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struct udevice *dev;
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uchar val;
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int ret;
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/* Turn on MAX77620 LDO3 to 3.3V for SD card power */
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debug("%s: Set LDO3 for VDDIO_SDMMC_AP power to 3.3V\n", __func__);
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ret = i2c_get_chip_for_busnum(0, MAX77620_I2C_ADDR_7BIT, 1, &dev);
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if (ret) {
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printf("%s: Cannot find MAX77620 I2C chip\n", __func__);
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return ret;
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}
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/* 0xF2 for 3.3v, enabled: bit7:6 = 11 = enable, bit5:0 = voltage */
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val = 0xF2;
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ret = dm_i2c_write(dev, MAX77620_CNFG1_L3_REG, &val, 1);
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if (ret) {
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printf("i2c_write 0 0x3c 0x27 failed: %d\n", ret);
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return ret;
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}
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return 0;
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}
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