// SPDX-License-Identifier: GPL-2.0
//
// Copyright (C) 2018 BayLibre SAS
// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
//
// Regulator driver for MAXIM 77650/77651 charger/power-supply.
#include <linux/of.h>
#include <linux/mfd/max77650.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#define MAX77650_REGULATOR_EN_CTRL_MASK GENMASK(3, 0)
#define MAX77650_REGULATOR_EN_CTRL_BITS(_reg) \
((_reg) & MAX77650_REGULATOR_EN_CTRL_MASK)
#define MAX77650_REGULATOR_ENABLED GENMASK(2, 1)
#define MAX77650_REGULATOR_DISABLED BIT(2)
#define MAX77650_REGULATOR_V_LDO_MASK GENMASK(6, 0)
#define MAX77650_REGULATOR_V_SBB_MASK GENMASK(5, 0)
#define MAX77651_REGULATOR_V_SBB1_MASK GENMASK(5, 2)
#define MAX77651_REGULATOR_V_SBB1_RANGE_MASK GENMASK(1, 0)
#define MAX77650_REGULATOR_AD_MASK BIT(3)
#define MAX77650_REGULATOR_AD_DISABLED 0x00
#define MAX77650_REGULATOR_AD_ENABLED BIT(3)
#define MAX77650_REGULATOR_CURR_LIM_MASK GENMASK(7, 6)
enum {
MAX77650_REGULATOR_ID_LDO = 0,
MAX77650_REGULATOR_ID_SBB0,
MAX77650_REGULATOR_ID_SBB1,
MAX77650_REGULATOR_ID_SBB2,
MAX77650_REGULATOR_NUM_REGULATORS,
};
struct max77650_regulator_desc {
struct regulator_desc desc;
unsigned int regA;
unsigned int regB;
};
static struct max77650_regulator_desc max77651_SBB1_desc;
static const unsigned int max77651_sbb1_volt_range_sel[] = {
0x0, 0x1, 0x2, 0x3
};
static const struct linear_range max77651_sbb1_volt_ranges[] = {
/* range index 0 */
REGULATOR_LINEAR_RANGE(2400000, 0x00, 0x0f, 50000),
/* range index 1 */
REGULATOR_LINEAR_RANGE(3200000, 0x00, 0x0f, 50000),
/* range index 2 */
REGULATOR_LINEAR_RANGE(4000000, 0x00, 0x0f, 50000),
/* range index 3 */
REGULATOR_LINEAR_RANGE(4800000, 0x00, 0x09, 50000),
};
static const unsigned int max77650_current_limit_table[] = {
1000000, 866000, 707000, 500000,
};
static int max77650_regulator_is_enabled(struct regulator_dev *rdev)
{
struct max77650_regulator_desc *rdesc;
struct regmap *map;
int val, rv, en;
rdesc = rdev_get_drvdata(rdev);
map = rdev_get_regmap(rdev);
rv = regmap_read(map, rdesc->regB, &val);
if (rv)
return rv;
en = MAX77650_REGULATOR_EN_CTRL_BITS(val);
return en != MAX77650_REGULATOR_DISABLED;
}
static int max77650_regulator_enable(struct regulator_dev *rdev)
{
struct max77650_regulator_desc *rdesc;
struct regmap *map;
rdesc = rdev_get_drvdata(rdev);
map = rdev_get_regmap(rdev);
return regmap_update_bits(map, rdesc->regB,
MAX77650_REGULATOR_EN_CTRL_MASK,
MAX77650_REGULATOR_ENABLED);
}
static int max77650_regulator_disable(struct regulator_dev *rdev)
{
struct max77650_regulator_desc *rdesc;
struct regmap *map;
rdesc = rdev_get_drvdata(rdev);
map = rdev_get_regmap(rdev);
return regmap_update_bits(map, rdesc->regB,
MAX77650_REGULATOR_EN_CTRL_MASK,
MAX77650_REGULATOR_DISABLED);
}
static const struct regulator_ops max77650_regulator_LDO_ops = {
.is_enabled = max77650_regulator_is_enabled,
.enable = max77650_regulator_enable,
.disable = max77650_regulator_disable,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_active_discharge = regulator_set_active_discharge_regmap,
};
static const struct regulator_ops max77650_regulator_SBB_ops = {
.is_enabled = max77650_regulator_is_enabled,
.enable = max77650_regulator_enable,
.disable = max77650_regulator_disable,
.list_voltage = regulator_list_voltage_linear,
.map_voltage = regulator_map_voltage_linear,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.set_active_discharge = regulator_set_active_discharge_regmap,
};
/* Special case for max77651 SBB1 - pickable linear-range voltage mapping. */
static const struct regulator_ops max77651_SBB1_regulator_ops = {
.is_enabled = max77650_regulator_is_enabled,
.enable = max77650_regulator_enable,
.disable = max77650_regulator_disable,
.list_voltage = regulator_list_voltage_pickable_linear_range,
.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
.set_voltage_sel = regulator_set_voltage_sel_pickable_regmap,
.get_current_limit = regulator_get_current_limit_regmap,
.set_current_limit = regulator_set_current_limit_regmap,
.set_active_discharge = regulator_set_active_discharge_regmap,
};
static struct max77650_regulator_desc max77650_LDO_desc = {
.desc = {
.name = "ldo",
.of_match = of_match_ptr("ldo"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-ldo",
.id = MAX77650_REGULATOR_ID_LDO,
.ops = &max77650_regulator_LDO_ops,
.min_uV = 1350000,
.uV_step = 12500,
.n_voltages = 128,
.vsel_step = 1,
.vsel_mask = MAX77650_REGULATOR_V_LDO_MASK,
.vsel_reg = MAX77650_REG_CNFG_LDO_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_LDO_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
},
.regA = MAX77650_REG_CNFG_LDO_A,
.regB = MAX77650_REG_CNFG_LDO_B,
};
static struct max77650_regulator_desc max77650_SBB0_desc = {
.desc = {
.name = "sbb0",
.of_match = of_match_ptr("sbb0"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-sbb0",
.id = MAX77650_REGULATOR_ID_SBB0,
.ops = &max77650_regulator_SBB_ops,
.min_uV = 800000,
.uV_step = 25000,
.n_voltages = 64,
.vsel_step = 1,
.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
.vsel_reg = MAX77650_REG_CNFG_SBB0_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_SBB0_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.csel_reg = MAX77650_REG_CNFG_SBB0_A,
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
.curr_table = max77650_current_limit_table,
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
},
.regA = MAX77650_REG_CNFG_SBB0_A,
.regB = MAX77650_REG_CNFG_SBB0_B,
};
static struct max77650_regulator_desc max77650_SBB1_desc = {
.desc = {
.name = "sbb1",
.of_match = of_match_ptr("sbb1"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-sbb1",
.id = MAX77650_REGULATOR_ID_SBB1,
.ops = &max77650_regulator_SBB_ops,
.min_uV = 800000,
.uV_step = 12500,
.n_voltages = 64,
.vsel_step = 1,
.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
.vsel_reg = MAX77650_REG_CNFG_SBB1_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_SBB1_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.csel_reg = MAX77650_REG_CNFG_SBB1_A,
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
.curr_table = max77650_current_limit_table,
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
},
.regA = MAX77650_REG_CNFG_SBB1_A,
.regB = MAX77650_REG_CNFG_SBB1_B,
};
static struct max77650_regulator_desc max77651_SBB1_desc = {
.desc = {
.name = "sbb1",
.of_match = of_match_ptr("sbb1"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-sbb1",
.id = MAX77650_REGULATOR_ID_SBB1,
.ops = &max77651_SBB1_regulator_ops,
.linear_range_selectors_bitfield = max77651_sbb1_volt_range_sel,
.linear_ranges = max77651_sbb1_volt_ranges,
.n_linear_ranges = ARRAY_SIZE(max77651_sbb1_volt_ranges),
.n_voltages = 58,
.vsel_step = 1,
.vsel_range_mask = MAX77651_REGULATOR_V_SBB1_RANGE_MASK,
.vsel_range_reg = MAX77650_REG_CNFG_SBB1_A,
.vsel_mask = MAX77651_REGULATOR_V_SBB1_MASK,
.vsel_reg = MAX77650_REG_CNFG_SBB1_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_SBB1_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.csel_reg = MAX77650_REG_CNFG_SBB1_A,
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
.curr_table = max77650_current_limit_table,
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
},
.regA = MAX77650_REG_CNFG_SBB1_A,
.regB = MAX77650_REG_CNFG_SBB1_B,
};
static struct max77650_regulator_desc max77650_SBB2_desc = {
.desc = {
.name = "sbb2",
.of_match = of_match_ptr("sbb2"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-sbb0",
.id = MAX77650_REGULATOR_ID_SBB2,
.ops = &max77650_regulator_SBB_ops,
.min_uV = 800000,
.uV_step = 50000,
.n_voltages = 64,
.vsel_step = 1,
.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
.vsel_reg = MAX77650_REG_CNFG_SBB2_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_SBB2_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.csel_reg = MAX77650_REG_CNFG_SBB2_A,
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
.curr_table = max77650_current_limit_table,
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
},
.regA = MAX77650_REG_CNFG_SBB2_A,
.regB = MAX77650_REG_CNFG_SBB2_B,
};
static struct max77650_regulator_desc max77651_SBB2_desc = {
.desc = {
.name = "sbb2",
.of_match = of_match_ptr("sbb2"),
.regulators_node = of_match_ptr("regulators"),
.supply_name = "in-sbb0",
.id = MAX77650_REGULATOR_ID_SBB2,
.ops = &max77650_regulator_SBB_ops,
.min_uV = 2400000,
.uV_step = 50000,
.n_voltages = 64,
.vsel_step = 1,
.vsel_mask = MAX77650_REGULATOR_V_SBB_MASK,
.vsel_reg = MAX77650_REG_CNFG_SBB2_A,
.active_discharge_off = MAX77650_REGULATOR_AD_DISABLED,
.active_discharge_on = MAX77650_REGULATOR_AD_ENABLED,
.active_discharge_mask = MAX77650_REGULATOR_AD_MASK,
.active_discharge_reg = MAX77650_REG_CNFG_SBB2_B,
.enable_time = 100,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.csel_reg = MAX77650_REG_CNFG_SBB2_A,
.csel_mask = MAX77650_REGULATOR_CURR_LIM_MASK,
.curr_table = max77650_current_limit_table,
.n_current_limits = ARRAY_SIZE(max77650_current_limit_table),
},
.regA = MAX77650_REG_CNFG_SBB2_A,
.regB = MAX77650_REG_CNFG_SBB2_B,
};
static int max77650_regulator_probe(struct platform_device *pdev)
{
struct max77650_regulator_desc **rdescs;
struct max77650_regulator_desc *rdesc;
struct regulator_config config = { };
struct device *dev, *parent;
struct regulator_dev *rdev;
struct regmap *map;
unsigned int val;
int i, rv;
dev = &pdev->dev;
parent = dev->parent;
if (!dev->of_node)
dev->of_node = parent->of_node;
rdescs = devm_kcalloc(dev, MAX77650_REGULATOR_NUM_REGULATORS,
sizeof(*rdescs), GFP_KERNEL);
if (!rdescs)
return -ENOMEM;
map = dev_get_regmap(parent, NULL);
if (!map)
return -ENODEV;
rv = regmap_read(map, MAX77650_REG_CID, &val);
if (rv)
return rv;
rdescs[MAX77650_REGULATOR_ID_LDO] = &max77650_LDO_desc;
rdescs[MAX77650_REGULATOR_ID_SBB0] = &max77650_SBB0_desc;
switch (MAX77650_CID_BITS(val)) {
case MAX77650_CID_77650A:
case MAX77650_CID_77650C:
rdescs[MAX77650_REGULATOR_ID_SBB1] = &max77650_SBB1_desc;
rdescs[MAX77650_REGULATOR_ID_SBB2] = &max77650_SBB2_desc;
break;
case MAX77650_CID_77651A:
case MAX77650_CID_77651B:
rdescs[MAX77650_REGULATOR_ID_SBB1] = &max77651_SBB1_desc;
rdescs[MAX77650_REGULATOR_ID_SBB2] = &max77651_SBB2_desc;
break;
default:
return -ENODEV;
}
config.dev = parent;
for (i = 0; i < MAX77650_REGULATOR_NUM_REGULATORS; i++) {
rdesc = rdescs[i];
config.driver_data = rdesc;
rdev = devm_regulator_register(dev, &rdesc->desc, &config);
if (IS_ERR(rdev))
return PTR_ERR(rdev);
}
return 0;
}
static const struct of_device_id max77650_regulator_of_match[] = {
{ .compatible = "maxim,max77650-regulator" },
{ }
};
MODULE_DEVICE_TABLE(of, max77650_regulator_of_match);
static struct platform_driver max77650_regulator_driver = {
.driver = {
.name = "max77650-regulator",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = max77650_regulator_of_match,
},
.probe = max77650_regulator_probe,
};
module_platform_driver(max77650_regulator_driver);
MODULE_DESCRIPTION("MAXIM 77650/77651 regulator driver");
MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:max77650-regulator");
