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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2016 Texas Instruments Incorporated, <www.ti.com>
* Keerthy <j-keerthy@ti.com>
*/
#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <dm/lists.h>
#include <i2c.h>
#include <log.h>
#include <linux/printk.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/palmas.h>
static const struct pmic_child_info pmic_children_info[] = {
{ .prefix = "ldo", .driver = PALMAS_LDO_DRIVER },
{ .prefix = "smps", .driver = PALMAS_SMPS_DRIVER },
{ },
};
static int palmas_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!\n", dev, reg);
return -EIO;
}
return 0;
}
static int palmas_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!\n", dev, reg);
return -EIO;
}
return 0;
}
static int palmas_bind(struct udevice *dev)
{
ofnode pmic_node = ofnode_null(), regulators_node;
ofnode subnode;
int children, ret;
if (IS_ENABLED(CONFIG_SYSRESET_PALMAS)) {
ret = device_bind_driver(dev, PALMAS_RST_DRIVER,
"sysreset", NULL);
if (ret) {
log_err("cannot bind SYSRESET (ret = %d)\n", ret);
return ret;
}
}
dev_for_each_subnode(subnode, dev) {
const char *name;
char *temp;
name = ofnode_get_name(subnode);
temp = strstr(name, "pmic");
if (temp) {
pmic_node = subnode;
break;
}
}
if (!ofnode_valid(pmic_node)) {
debug("%s: %s pmic subnode not found!\n", __func__, dev->name);
return -ENXIO;
}
regulators_node = ofnode_find_subnode(pmic_node, "regulators");
if (!ofnode_valid(regulators_node)) {
debug("%s: %s reg subnode not found!\n", __func__, dev->name);
return -ENXIO;
}
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 palmas_probe(struct udevice *dev)
{
struct dm_i2c_chip *chip = dev_get_parent_plat(dev);
struct palmas_priv *priv = dev_get_priv(dev);
struct udevice *bus = dev_get_parent(dev);
u32 chip2_addr = chip->chip_addr + 1;
int ret;
/* Palmas PMIC is multi chip and chips are located in a row */
ret = i2c_get_chip(bus, chip2_addr, 1, &priv->chip2);
if (ret) {
log_err("cannot get second PMIC I2C chip (err %d)\n", ret);
return ret;
}
return 0;
}
static struct dm_pmic_ops palmas_ops = {
.read = palmas_read,
.write = palmas_write,
};
static const struct udevice_id palmas_ids[] = {
{ .compatible = "ti,tps659038", .data = TPS659038 },
{ .compatible = "ti,tps65913" , .data = TPS659038 },
{ .compatible = "ti,tps65917" , .data = TPS65917 },
{ }
};
U_BOOT_DRIVER(pmic_palmas) = {
.name = "palmas_pmic",
.id = UCLASS_PMIC,
.of_match = palmas_ids,
.bind = palmas_bind,
.probe = palmas_probe,
.ops = &palmas_ops,
.priv_auto = sizeof(struct palmas_priv),
};
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