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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2023 Starfive, Inc.
* Author: keith.zhao<keith.zhao@statfivetech.com>
*/
#include <common.h>
#include <fdtdec.h>
#include <errno.h>
#include <dm.h>
#include <i2c.h>
#include <power/pmic.h>
#include <power/regulator.h>
#include <power/lp873x.h>
static const char lp873x_ldo_ctrl[LP873X_LDO_NUM] = {0x8, 0x9};
static const char lp873x_ldo_volt[LP873X_LDO_NUM] = {0xA, 0xB};
static int lp873x_ldo_enable(struct udevice *dev, int op, bool *enable)
{
int ret;
unsigned int adr;
struct dm_regulator_uclass_plat *uc_pdata;
uc_pdata = dev_get_uclass_plat(dev);
adr = uc_pdata->ctrl_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= LP873X_LDO_MODE_MASK;
if (ret)
*enable = true;
else
*enable = false;
return 0;
} else if (op == PMIC_OP_SET) {
if (*enable)
ret |= LP873X_LDO_MODE_MASK;
else
ret &= ~(LP873X_LDO_MODE_MASK);
ret = pmic_reg_write(dev->parent, adr, ret);
if (ret)
return ret;
}
return 0;
}
static int lp873x_ldo_volt2hex(int uV)
{
if (uV > LP873X_LDO_VOLT_MAX)
return -EINVAL;
return (uV - 800000) / 100000;
}
static int lp873x_ldo_hex2volt(int hex)
{
if (hex > LP873X_LDO_VOLT_MAX_HEX)
return -EINVAL;
if (!hex)
return 0;
return (hex * 100000) + 800000;
}
static int lp873x_ldo_val(struct udevice *dev, int op, int *uV)
{
unsigned int hex, adr;
int ret;
struct dm_regulator_uclass_plat *uc_pdata;
if (op == PMIC_OP_GET)
*uV = 0;
uc_pdata = dev_get_uclass_plat(dev);
adr = uc_pdata->volt_reg;
ret = pmic_reg_read(dev->parent, adr);
if (ret < 0)
return ret;
if (op == PMIC_OP_GET) {
ret &= LP873X_LDO_VOLT_MASK;
ret = lp873x_ldo_hex2volt(ret);
if (ret < 0)
return ret;
*uV = ret;
return 0;
}
hex = lp873x_ldo_volt2hex(*uV);
if (hex < 0)
return hex;
ret &= ~LP873X_LDO_VOLT_MASK;
ret |= hex;
if (*uV > 1650000)
ret |= 0x80;
ret = pmic_reg_write(dev->parent, adr, ret);
return ret;
}
static int lp873x_ldo_probe(struct udevice *dev)
{
struct dm_regulator_uclass_plat *uc_pdata;
uc_pdata = dev_get_uclass_plat(dev);
uc_pdata->type = REGULATOR_TYPE_LDO;
int idx = dev->driver_data;
if (idx >= LP873X_LDO_NUM) {
return -1;
}
uc_pdata->ctrl_reg = lp873x_ldo_ctrl[idx];
uc_pdata->volt_reg = lp873x_ldo_volt[idx];
return 0;
}
static int ldo_get_value(struct udevice *dev)
{
int uV;
int ret;
ret = lp873x_ldo_val(dev, PMIC_OP_GET, &uV);
if (ret)
return ret;
return uV;
}
static int ldo_set_value(struct udevice *dev, int uV)
{
return lp873x_ldo_val(dev, PMIC_OP_SET, &uV);
}
static int ldo_get_enable(struct udevice *dev)
{
bool enable = false;
int ret;
ret = lp873x_ldo_enable(dev, PMIC_OP_GET, &enable);
if (ret)
return ret;
return enable;
}
static int ldo_set_enable(struct udevice *dev, bool enable)
{
return lp873x_ldo_enable(dev, PMIC_OP_SET, &enable);
}
static const struct dm_regulator_ops lp873x_ldo_ops = {
.get_value = ldo_get_value,
.set_value = ldo_set_value,
.get_enable = ldo_get_enable,
.set_enable = ldo_set_enable,
};
U_BOOT_DRIVER(lp873x_ldo) = {
.name = LP873X_LDO_DRIVER,
.id = UCLASS_REGULATOR,
.ops = &lp873x_ldo_ops,
.probe = lp873x_ldo_probe,
};
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