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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <power/rk8xx_pmic.h>
#include <power/pmic.h>
static struct reg_data rk817_init_reg[] = {
/* enable the under-voltage protection,
* the under-voltage protection will shutdown the LDO3 and reset the PMIC
*/
{ RK817_BUCK4_CMIN, 0x60, 0x60},
};
static const struct pmic_child_info pmic_children_info[] = {
{ .prefix = "DCDC_REG", .driver = "rk8xx_buck"},
{ .prefix = "LDO_REG", .driver = "rk8xx_ldo"},
{ .prefix = "SWITCH_REG", .driver = "rk8xx_switch"},
{ },
};
static int rk8xx_reg_count(struct udevice *dev)
{
return RK808_NUM_OF_REGS;
}
static int rk8xx_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!\n", dev, reg);
return ret;
}
return 0;
}
static int rk8xx_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!\n", dev, reg);
return ret;
}
return 0;
}
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
static int rk8xx_bind(struct udevice *dev)
{
ofnode regulators_node;
int children;
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;
}
#endif
static int rk8xx_probe(struct udevice *dev)
{
struct rk8xx_priv *priv = dev_get_priv(dev);
struct reg_data *init_data = NULL;
int init_data_num = 0;
int ret = 0, i, show_variant;
u8 msb, lsb, id_msb, id_lsb;
u8 on_source = 0, off_source = 0;
u8 power_en0, power_en1, power_en2, power_en3;
u8 value;
/* read Chip variant */
if (device_is_compatible(dev, "rockchip,rk817") ||
device_is_compatible(dev, "rockchip,rk809")) {
id_msb = RK817_ID_MSB;
id_lsb = RK817_ID_LSB;
} else {
id_msb = ID_MSB;
id_lsb = ID_LSB;
}
ret = rk8xx_read(dev, id_msb, &msb, 1);
if (ret)
return ret;
ret = rk8xx_read(dev, id_lsb, &lsb, 1);
if (ret)
return ret;
priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK;
show_variant = priv->variant;
switch (priv->variant) {
case RK808_ID:
show_variant = 0x808; /* RK808 hardware ID is 0 */
break;
case RK805_ID:
case RK816_ID:
case RK818_ID:
on_source = RK8XX_ON_SOURCE;
off_source = RK8XX_OFF_SOURCE;
break;
case RK809_ID:
case RK817_ID:
on_source = RK817_ON_SOURCE;
off_source = RK817_OFF_SOURCE;
init_data = rk817_init_reg;
init_data_num = ARRAY_SIZE(rk817_init_reg);
power_en0 = pmic_reg_read(dev, RK817_POWER_EN0);
power_en1 = pmic_reg_read(dev, RK817_POWER_EN1);
power_en2 = pmic_reg_read(dev, RK817_POWER_EN2);
power_en3 = pmic_reg_read(dev, RK817_POWER_EN3);
value = (power_en0 & 0x0f) | ((power_en1 & 0x0f) << 4);
pmic_reg_write(dev, RK817_POWER_EN_SAVE0, value);
value = (power_en2 & 0x0f) | ((power_en3 & 0x0f) << 4);
pmic_reg_write(dev, RK817_POWER_EN_SAVE1, value);
break;
default:
printf("Unknown PMIC: RK%x!!\n", priv->variant);
return -EINVAL;
}
for (i = 0; i < init_data_num; i++) {
ret = pmic_clrsetbits(dev,
init_data[i].reg,
init_data[i].mask,
init_data[i].val);
if (ret < 0) {
printf("%s: i2c set reg 0x%x failed, ret=%d\n",
__func__, init_data[i].reg, ret);
}
debug("%s: reg[0x%x] = 0x%x\n", __func__, init_data[i].reg,
pmic_reg_read(dev, init_data[i].reg));
}
printf("PMIC: RK%x ", show_variant);
if (on_source && off_source)
printf("(on=0x%02x, off=0x%02x)",
pmic_reg_read(dev, on_source),
pmic_reg_read(dev, off_source));
printf("\n");
return 0;
}
static struct dm_pmic_ops rk8xx_ops = {
.reg_count = rk8xx_reg_count,
.read = rk8xx_read,
.write = rk8xx_write,
};
static const struct udevice_id rk8xx_ids[] = {
{ .compatible = "rockchip,rk805" },
{ .compatible = "rockchip,rk808" },
{ .compatible = "rockchip,rk809" },
{ .compatible = "rockchip,rk816" },
{ .compatible = "rockchip,rk817" },
{ .compatible = "rockchip,rk818" },
{ }
};
U_BOOT_DRIVER(pmic_rk8xx) = {
.name = "rk8xx pmic",
.id = UCLASS_PMIC,
.of_match = rk8xx_ids,
#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
.bind = rk8xx_bind,
#endif
.priv_auto_alloc_size = sizeof(struct rk8xx_priv),
.probe = rk8xx_probe,
.ops = &rk8xx_ops,
};
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