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/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <fdtdec.h>
#include <libfdt.h>
#include <power/rk808_pmic.h>
#include <power/pmic.h>
DECLARE_GLOBAL_DATA_PTR;
static const struct pmic_child_info pmic_children_info[] = {
{ .prefix = "DCDC_REG", .driver = "rk808_buck"},
{ .prefix = "LDO_REG", .driver = "rk808_ldo"},
{ .prefix = "SWITCH_REG", .driver = "rk808_switch"},
{ },
};
static int rk808_reg_count(struct udevice *dev)
{
return RK808_NUM_OF_REGS;
}
static int rk808_write(struct udevice *dev, uint reg, const uint8_t *buff,
int len)
{
int ret;
ret = dm_i2c_write(dev, reg, buff, len);
if (ret) {
debug("write error to device: %p register: %#x!", dev, reg);
return ret;
}
return 0;
}
static int rk808_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
{
int ret;
ret = dm_i2c_read(dev, reg, buff, len);
if (ret) {
debug("read error from device: %p register: %#x!", dev, reg);
return ret;
}
return 0;
}
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
static int rk808_bind(struct udevice *dev)
{
const void *blob = gd->fdt_blob;
int regulators_node;
int children;
regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
"regulators");
if (regulators_node <= 0) {
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;
}
#endif
static int rk808_probe(struct udevice *dev)
{
struct rk808_priv *priv = dev_get_priv(dev);
uint8_t msb, lsb;
/* read Chip variant */
rk808_read(dev, ID_MSB, &msb, 1);
rk808_read(dev, ID_LSB, &lsb, 1);
priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
return 0;
}
static struct dm_pmic_ops rk808_ops = {
.reg_count = rk808_reg_count,
.read = rk808_read,
.write = rk808_write,
};
static const struct udevice_id rk808_ids[] = {
{ .compatible = "rockchip,rk808" },
{ .compatible = "rockchip,rk818" },
{ }
};
U_BOOT_DRIVER(pmic_rk808) = {
.name = "rk808 pmic",
.id = UCLASS_PMIC,
.of_match = rk808_ids,
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
.bind = rk808_bind,
#endif
.probe = rk808_probe,
.ops = &rk808_ops,
};
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