u-boot/drivers/power/pmic/bd71837.c
Matti Vaittinen 1023c8739b regulator: bd71837: copy the bd71837 pmic driver from NXP imx u-boot
https://source.codeaurora.org/external/imx/uboot-imx

cherry picked, styled and merged commits:
- MLK-18387 pmic: Add pmic driver for BD71837: e9a3bec2e95a
- MLK-18590 pmic: bd71837: Change to use new fdt API: acdc5c297a96

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2019-06-11 10:42:48 +02:00

89 lines
1.9 KiB
C

// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2018 NXP
*/
#include <common.h>
#include <errno.h>
#include <dm.h>
#include <i2c.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 = BD71837_REGULATOR_DRIVER},
/* ldo */
{ .prefix = "l", .driver = BD71837_REGULATOR_DRIVER},
{ },
};
static int bd71837_reg_count(struct udevice *dev)
{
return BD71837_REG_NUM;
}
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!", __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 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 = 0x4b, },
{ }
};
U_BOOT_DRIVER(pmic_bd71837) = {
.name = "bd71837 pmic",
.id = UCLASS_PMIC,
.of_match = bd71837_ids,
.bind = bd71837_bind,
.ops = &bd71837_ops,
};