mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-20 18:23:08 +00:00
5d89afe27f
The I2C address is 0x25, not 0x35. This according to the datasheet and tests with a PCA9450A. Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
94 lines
2 KiB
C
94 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright 2019 NXP
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <fdtdec.h>
|
|
#include <errno.h>
|
|
#include <dm.h>
|
|
#include <i2c.h>
|
|
#include <log.h>
|
|
#include <power/pmic.h>
|
|
#include <power/regulator.h>
|
|
#include <power/pca9450.h>
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
static const struct pmic_child_info pmic_children_info[] = {
|
|
/* buck */
|
|
{ .prefix = "b", .driver = PCA9450_REGULATOR_DRIVER},
|
|
/* ldo */
|
|
{ .prefix = "l", .driver = PCA9450_REGULATOR_DRIVER},
|
|
{ },
|
|
};
|
|
|
|
static int pca9450_reg_count(struct udevice *dev)
|
|
{
|
|
return PCA9450_REG_NUM;
|
|
}
|
|
|
|
static int pca9450_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 pca9450_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 pca9450_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 pca9450_ops = {
|
|
.reg_count = pca9450_reg_count,
|
|
.read = pca9450_read,
|
|
.write = pca9450_write,
|
|
};
|
|
|
|
static const struct udevice_id pca9450_ids[] = {
|
|
{ .compatible = "nxp,pca9450a", .data = 0x25, },
|
|
{ .compatible = "nxp,pca9450b", .data = 0x25, },
|
|
{ }
|
|
};
|
|
|
|
U_BOOT_DRIVER(pmic_pca9450) = {
|
|
.name = "pca9450 pmic",
|
|
.id = UCLASS_PMIC,
|
|
.of_match = pca9450_ids,
|
|
.bind = pca9450_bind,
|
|
.ops = &pca9450_ops,
|
|
};
|