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This driver implements register read/write operations for STPMU1. The STPMU1 PMIC provides 4 BUCKs, 6 LDOs, 1 VREF and 2 power switches. It is accessed via an I2C interface. This device is used with STM32MP1 SoCs. Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
63 lines
1.2 KiB
C
63 lines
1.2 KiB
C
/*
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* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
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*
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* SPDX-License-Identifier: GPL-2.0+ BSD-3-Clause
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <i2c.h>
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#include <power/pmic.h>
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#include <power/stpmu1.h>
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#define STMPU1_NUM_OF_REGS 0x100
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static int stpmu1_reg_count(struct udevice *dev)
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{
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return STMPU1_NUM_OF_REGS;
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}
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static int stpmu1_write(struct udevice *dev, uint reg, const uint8_t *buff,
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int len)
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{
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int ret;
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ret = dm_i2c_write(dev, reg, buff, len);
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if (ret)
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dev_err(dev, "%s: failed to write register %#x :%d",
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__func__, reg, ret);
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return ret;
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}
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static int stpmu1_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
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{
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int ret;
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ret = dm_i2c_read(dev, reg, buff, len);
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if (ret)
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dev_err(dev, "%s: failed to read register %#x : %d",
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__func__, reg, ret);
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return ret;
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}
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static struct dm_pmic_ops stpmu1_ops = {
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.reg_count = stpmu1_reg_count,
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.read = stpmu1_read,
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.write = stpmu1_write,
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};
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static const struct udevice_id stpmu1_ids[] = {
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{ .compatible = "st,stpmu1" },
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{ }
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};
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U_BOOT_DRIVER(pmic_stpmu1) = {
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.name = "stpmu1_pmic",
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.id = UCLASS_PMIC,
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.of_match = stpmu1_ids,
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.ops = &stpmu1_ops,
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};
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