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