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https://github.com/AsahiLinux/u-boot
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110 lines
2.5 KiB
C
110 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2018 NXP
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*/
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#include <common.h>
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#include <errno.h>
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#include <dm.h>
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#include <i2c.h>
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#include <log.h>
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#include <power/pmic.h>
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#include <power/regulator.h>
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#include <power/bd71837.h>
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DECLARE_GLOBAL_DATA_PTR;
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static const struct pmic_child_info pmic_children_info[] = {
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/* buck */
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{ .prefix = "b", .driver = BD718XX_REGULATOR_DRIVER},
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/* ldo */
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{ .prefix = "l", .driver = BD718XX_REGULATOR_DRIVER},
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{ },
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};
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static int bd71837_reg_count(struct udevice *dev)
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{
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return BD718XX_MAX_REGISTER - 1;
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}
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static int bd71837_write(struct udevice *dev, uint reg, const uint8_t *buff,
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int len)
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{
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if (dm_i2c_write(dev, reg, buff, len)) {
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pr_err("write error to device: %p register: %#x!", dev, reg);
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return -EIO;
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}
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return 0;
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}
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static int bd71837_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
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{
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if (dm_i2c_read(dev, reg, buff, len)) {
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pr_err("read error from device: %p register: %#x!", dev, reg);
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return -EIO;
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}
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return 0;
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}
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static int bd71837_bind(struct udevice *dev)
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{
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int children;
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ofnode regulators_node;
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regulators_node = dev_read_subnode(dev, "regulators");
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if (!ofnode_valid(regulators_node)) {
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debug("%s: %s regulators subnode not found!\n", __func__,
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dev->name);
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return -ENXIO;
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}
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debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
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children = pmic_bind_children(dev, regulators_node, pmic_children_info);
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if (!children)
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debug("%s: %s - no child found\n", __func__, dev->name);
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/* Always return success for this device */
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return 0;
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}
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static int bd718x7_probe(struct udevice *dev)
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{
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int ret;
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uint8_t mask = BD718XX_REGLOCK_PWRSEQ | BD718XX_REGLOCK_VREG;
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/* Unlock the PMIC regulator control before probing the children */
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ret = pmic_clrsetbits(dev, BD718XX_REGLOCK, mask, 0);
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if (ret) {
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debug("%s: %s Failed to unlock regulator control\n", __func__,
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dev->name);
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return ret;
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}
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debug("%s: '%s' - BD718x7 PMIC registers unlocked\n", __func__,
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dev->name);
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return 0;
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}
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static struct dm_pmic_ops bd71837_ops = {
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.reg_count = bd71837_reg_count,
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.read = bd71837_read,
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.write = bd71837_write,
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};
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static const struct udevice_id bd71837_ids[] = {
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{ .compatible = "rohm,bd71837", .data = ROHM_CHIP_TYPE_BD71837, },
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{ .compatible = "rohm,bd71847", .data = ROHM_CHIP_TYPE_BD71847, },
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{ }
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};
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U_BOOT_DRIVER(pmic_bd71837) = {
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.name = "bd71837 pmic",
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.id = UCLASS_PMIC,
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.of_match = bd71837_ids,
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.bind = bd71837_bind,
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.probe = bd718x7_probe,
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.ops = &bd71837_ops,
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};
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