mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-04 03:14:02 +08:00
b29f42c662
'id' is an enum, thus cast of pointer on 64-bit compile test with W=1 causes: max77857-regulator.c:56:24: error: cast to smaller integer type 'enum max77857_id' from 'void *' [-Werror,-Wvoid-pointer-to-enum-cast] Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20230810111914.204847-2-krzysztof.kozlowski@linaro.org Signed-off-by: Mark Brown <broonie@kernel.org>
462 lines
12 KiB
C
462 lines
12 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2023 Analog Devices, Inc.
|
|
* ADI Regulator driver for the MAX77857
|
|
* MAX77859 and MAX77831.
|
|
*/
|
|
#include <linux/bitfield.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/module.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/machine.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
#include <linux/util_macros.h>
|
|
|
|
#define MAX77857_REG_INT_SRC 0x10
|
|
#define MAX77857_REG_INT_MASK 0x11
|
|
#define MAX77857_REG_CONT1 0x12
|
|
#define MAX77857_REG_CONT2 0x13
|
|
#define MAX77857_REG_CONT3 0x14
|
|
|
|
#define MAX77857_INT_SRC_OCP BIT(0)
|
|
#define MAX77857_INT_SRC_THS BIT(1)
|
|
#define MAX77857_INT_SRC_HARDSHORT BIT(2)
|
|
#define MAX77857_INT_SRC_OVP BIT(3)
|
|
#define MAX77857_INT_SRC_POK BIT(4)
|
|
|
|
#define MAX77857_ILIM_MASK GENMASK(2, 0)
|
|
#define MAX77857_CONT1_FREQ GENMASK(4, 3)
|
|
#define MAX77857_CONT3_FPWM BIT(5)
|
|
|
|
#define MAX77859_REG_INT_SRC 0x11
|
|
#define MAX77859_REG_CONT1 0x13
|
|
#define MAX77859_REG_CONT2 0x14
|
|
#define MAX77859_REG_CONT3 0x15
|
|
#define MAX77859_REG_CONT5 0x17
|
|
#define MAX77859_CONT2_FPWM BIT(2)
|
|
#define MAX77859_CONT2_INTB BIT(3)
|
|
#define MAX77859_CONT3_DVS_START BIT(2)
|
|
#define MAX77859_VOLTAGE_SEL_MASK GENMASK(9, 0)
|
|
|
|
#define MAX77859_CURRENT_MIN 1000000
|
|
#define MAX77859_CURRENT_MAX 5000000
|
|
#define MAX77859_CURRENT_STEP 50000
|
|
|
|
enum max77857_id {
|
|
ID_MAX77831 = 1,
|
|
ID_MAX77857,
|
|
ID_MAX77859,
|
|
ID_MAX77859A,
|
|
};
|
|
|
|
static bool max77857_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
enum max77857_id id = (uintptr_t)dev_get_drvdata(dev);
|
|
|
|
switch (id) {
|
|
case ID_MAX77831:
|
|
case ID_MAX77857:
|
|
return reg == MAX77857_REG_INT_SRC;
|
|
case ID_MAX77859:
|
|
case ID_MAX77859A:
|
|
return reg == MAX77859_REG_INT_SRC;
|
|
default:
|
|
return true;
|
|
}
|
|
}
|
|
|
|
static struct regmap_config max77857_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
.cache_type = REGCACHE_MAPLE,
|
|
.volatile_reg = max77857_volatile_reg,
|
|
};
|
|
|
|
static int max77857_get_status(struct regulator_dev *rdev)
|
|
{
|
|
unsigned int val;
|
|
int ret;
|
|
|
|
ret = regmap_read(rdev->regmap, MAX77857_REG_INT_SRC, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (FIELD_GET(MAX77857_INT_SRC_POK, val))
|
|
return REGULATOR_STATUS_ON;
|
|
|
|
return REGULATOR_STATUS_ERROR;
|
|
}
|
|
|
|
static unsigned int max77857_get_mode(struct regulator_dev *rdev)
|
|
{
|
|
enum max77857_id id = (uintptr_t)rdev_get_drvdata(rdev);
|
|
unsigned int regval;
|
|
int ret;
|
|
|
|
switch (id) {
|
|
case ID_MAX77831:
|
|
case ID_MAX77857:
|
|
ret = regmap_read(rdev->regmap, MAX77857_REG_CONT3, ®val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (FIELD_GET(MAX77857_CONT3_FPWM, regval))
|
|
return REGULATOR_MODE_FAST;
|
|
|
|
break;
|
|
case ID_MAX77859:
|
|
case ID_MAX77859A:
|
|
ret = regmap_read(rdev->regmap, MAX77859_REG_CONT2, ®val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (FIELD_GET(MAX77859_CONT2_FPWM, regval))
|
|
return REGULATOR_MODE_FAST;
|
|
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return REGULATOR_MODE_NORMAL;
|
|
}
|
|
|
|
static int max77857_set_mode(struct regulator_dev *rdev, unsigned int mode)
|
|
{
|
|
enum max77857_id id = (uintptr_t)rdev_get_drvdata(rdev);
|
|
unsigned int reg, val;
|
|
|
|
switch (id) {
|
|
case ID_MAX77831:
|
|
case ID_MAX77857:
|
|
reg = MAX77857_REG_CONT3;
|
|
val = MAX77857_CONT3_FPWM;
|
|
break;
|
|
case ID_MAX77859:
|
|
case ID_MAX77859A:
|
|
reg = MAX77859_REG_CONT2;
|
|
val = MAX77859_CONT2_FPWM;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
switch (mode) {
|
|
case REGULATOR_MODE_FAST:
|
|
return regmap_set_bits(rdev->regmap, reg, val);
|
|
case REGULATOR_MODE_NORMAL:
|
|
return regmap_clear_bits(rdev->regmap, reg, val);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static int max77857_get_error_flags(struct regulator_dev *rdev,
|
|
unsigned int *flags)
|
|
{
|
|
unsigned int val;
|
|
int ret;
|
|
|
|
ret = regmap_read(rdev->regmap, MAX77857_REG_INT_SRC, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
*flags = 0;
|
|
|
|
if (FIELD_GET(MAX77857_INT_SRC_OVP, val))
|
|
*flags |= REGULATOR_ERROR_OVER_VOLTAGE_WARN;
|
|
|
|
if (FIELD_GET(MAX77857_INT_SRC_OCP, val) ||
|
|
FIELD_GET(MAX77857_INT_SRC_HARDSHORT, val))
|
|
*flags |= REGULATOR_ERROR_OVER_CURRENT;
|
|
|
|
if (FIELD_GET(MAX77857_INT_SRC_THS, val))
|
|
*flags |= REGULATOR_ERROR_OVER_TEMP;
|
|
|
|
if (!FIELD_GET(MAX77857_INT_SRC_POK, val))
|
|
*flags |= REGULATOR_ERROR_FAIL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct linear_range max77859_lin_ranges[] = {
|
|
REGULATOR_LINEAR_RANGE(3200000, 0x0A0, 0x320, 20000)
|
|
};
|
|
|
|
static const unsigned int max77859_ramp_table[4] = {
|
|
1000, 500, 250, 125
|
|
};
|
|
|
|
static int max77859_set_voltage_sel(struct regulator_dev *rdev,
|
|
unsigned int sel)
|
|
{
|
|
__be16 reg;
|
|
int ret;
|
|
|
|
reg = cpu_to_be16(sel);
|
|
|
|
ret = regmap_bulk_write(rdev->regmap, MAX77859_REG_CONT3, ®, 2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* actually apply new voltage */
|
|
return regmap_set_bits(rdev->regmap, MAX77859_REG_CONT3,
|
|
MAX77859_CONT3_DVS_START);
|
|
}
|
|
|
|
static int max77859_get_voltage_sel(struct regulator_dev *rdev)
|
|
{
|
|
__be16 reg;
|
|
int ret;
|
|
|
|
ret = regmap_bulk_read(rdev->regmap, MAX77859_REG_CONT3, ®, 2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return FIELD_GET(MAX77859_VOLTAGE_SEL_MASK, __be16_to_cpu(reg));
|
|
}
|
|
|
|
static int max77859_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA)
|
|
{
|
|
u32 selector;
|
|
|
|
if (max_uA < MAX77859_CURRENT_MIN)
|
|
return -EINVAL;
|
|
|
|
selector = 0x12 + (max_uA - MAX77859_CURRENT_MIN) / MAX77859_CURRENT_STEP;
|
|
|
|
selector = clamp_val(selector, 0x00, 0x7F);
|
|
|
|
return regmap_write(rdev->regmap, MAX77859_REG_CONT5, selector);
|
|
}
|
|
|
|
static int max77859_get_current_limit(struct regulator_dev *rdev)
|
|
{
|
|
u32 selector;
|
|
int ret;
|
|
|
|
ret = regmap_read(rdev->regmap, MAX77859_REG_CONT5, &selector);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (selector <= 0x12)
|
|
return MAX77859_CURRENT_MIN;
|
|
|
|
if (selector >= 0x64)
|
|
return MAX77859_CURRENT_MAX;
|
|
|
|
return MAX77859_CURRENT_MIN + (selector - 0x12) * MAX77859_CURRENT_STEP;
|
|
}
|
|
|
|
static const struct regulator_ops max77859_regulator_ops = {
|
|
.list_voltage = regulator_list_voltage_linear_range,
|
|
.set_voltage_sel = max77859_set_voltage_sel,
|
|
.get_voltage_sel = max77859_get_voltage_sel,
|
|
.set_ramp_delay = regulator_set_ramp_delay_regmap,
|
|
.get_status = max77857_get_status,
|
|
.set_mode = max77857_set_mode,
|
|
.get_mode = max77857_get_mode,
|
|
.get_error_flags = max77857_get_error_flags,
|
|
};
|
|
|
|
static const struct regulator_ops max77859a_regulator_ops = {
|
|
.list_voltage = regulator_list_voltage_linear_range,
|
|
.set_voltage_sel = max77859_set_voltage_sel,
|
|
.get_voltage_sel = max77859_get_voltage_sel,
|
|
.set_current_limit = max77859_set_current_limit,
|
|
.get_current_limit = max77859_get_current_limit,
|
|
.set_ramp_delay = regulator_set_ramp_delay_regmap,
|
|
.get_status = max77857_get_status,
|
|
.set_mode = max77857_set_mode,
|
|
.get_mode = max77857_get_mode,
|
|
.get_error_flags = max77857_get_error_flags,
|
|
};
|
|
|
|
static const struct regulator_ops max77857_regulator_ops = {
|
|
.list_voltage = regulator_list_voltage_linear_range,
|
|
.set_voltage_sel = regulator_set_voltage_sel_regmap,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
.set_ramp_delay = regulator_set_ramp_delay_regmap,
|
|
.get_status = max77857_get_status,
|
|
.set_mode = max77857_set_mode,
|
|
.get_mode = max77857_get_mode,
|
|
.get_error_flags = max77857_get_error_flags,
|
|
};
|
|
|
|
static struct linear_range max77857_lin_ranges[] = {
|
|
REGULATOR_LINEAR_RANGE(4485000, 0x3D, 0xCC, 73500)
|
|
};
|
|
|
|
static const unsigned int max77857_switch_freq[] = {
|
|
1200000, 1500000, 1800000, 2100000
|
|
};
|
|
|
|
#define RAMAP_DELAY_INIT_VAL 1333
|
|
|
|
static const unsigned int max77857_ramp_table[2][4] = {
|
|
{ RAMAP_DELAY_INIT_VAL, 667, 333, 227 }, /* when switch freq is 1.8MHz or 2.1MHz */
|
|
{ 1166, 667, 333, 167 }, /* when switch freq is 1.2MHz or 1.5MHz */
|
|
};
|
|
|
|
static struct regulator_desc max77857_regulator_desc = {
|
|
.ops = &max77857_regulator_ops,
|
|
.name = "max77857",
|
|
.linear_ranges = max77857_lin_ranges,
|
|
.n_linear_ranges = ARRAY_SIZE(max77857_lin_ranges),
|
|
.vsel_mask = 0xFF,
|
|
.vsel_reg = MAX77857_REG_CONT2,
|
|
.ramp_delay_table = max77857_ramp_table[0],
|
|
.n_ramp_values = ARRAY_SIZE(max77857_ramp_table[0]),
|
|
.ramp_reg = MAX77857_REG_CONT3,
|
|
.ramp_mask = GENMASK(1, 0),
|
|
.ramp_delay = RAMAP_DELAY_INIT_VAL,
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
static void max77857_calc_range(struct device *dev, enum max77857_id id)
|
|
{
|
|
struct linear_range *range;
|
|
unsigned long vref_step;
|
|
u32 rtop = 0;
|
|
u32 rbot = 0;
|
|
|
|
device_property_read_u32(dev, "adi,rtop-ohms", &rtop);
|
|
device_property_read_u32(dev, "adi,rbot-ohms", &rbot);
|
|
|
|
if (!rbot || !rtop)
|
|
return;
|
|
|
|
switch (id) {
|
|
case ID_MAX77831:
|
|
case ID_MAX77857:
|
|
range = max77857_lin_ranges;
|
|
vref_step = 4900UL;
|
|
break;
|
|
case ID_MAX77859:
|
|
case ID_MAX77859A:
|
|
range = max77859_lin_ranges;
|
|
vref_step = 1250UL;
|
|
break;
|
|
}
|
|
|
|
range->step = DIV_ROUND_CLOSEST(vref_step * (rbot + rtop), rbot);
|
|
range->min = range->step * range->min_sel;
|
|
}
|
|
|
|
static int max77857_probe(struct i2c_client *client)
|
|
{
|
|
const struct i2c_device_id *i2c_id;
|
|
struct device *dev = &client->dev;
|
|
struct regulator_config cfg = { };
|
|
struct regulator_dev *rdev;
|
|
struct regmap *regmap;
|
|
enum max77857_id id;
|
|
u32 switch_freq = 0;
|
|
int ret;
|
|
|
|
i2c_id = i2c_client_get_device_id(client);
|
|
if (!i2c_id)
|
|
return -EINVAL;
|
|
|
|
id = i2c_id->driver_data;
|
|
|
|
dev_set_drvdata(dev, (void *)id);
|
|
|
|
if (id == ID_MAX77859 || id == ID_MAX77859A) {
|
|
max77857_regulator_desc.ops = &max77859_regulator_ops;
|
|
max77857_regulator_desc.linear_ranges = max77859_lin_ranges;
|
|
max77857_regulator_desc.ramp_delay_table = max77859_ramp_table;
|
|
max77857_regulator_desc.ramp_delay = max77859_ramp_table[0];
|
|
}
|
|
|
|
if (id == ID_MAX77859A)
|
|
max77857_regulator_desc.ops = &max77859a_regulator_ops;
|
|
|
|
max77857_calc_range(dev, id);
|
|
|
|
regmap = devm_regmap_init_i2c(client, &max77857_regmap_config);
|
|
if (IS_ERR(regmap))
|
|
return dev_err_probe(dev, PTR_ERR(regmap),
|
|
"cannot initialize regmap\n");
|
|
|
|
device_property_read_u32(dev, "adi,switch-frequency-hz", &switch_freq);
|
|
if (switch_freq) {
|
|
switch_freq = find_closest(switch_freq, max77857_switch_freq,
|
|
ARRAY_SIZE(max77857_switch_freq));
|
|
|
|
if (id == ID_MAX77831 && switch_freq == 3)
|
|
switch_freq = 2;
|
|
|
|
switch (id) {
|
|
case ID_MAX77831:
|
|
case ID_MAX77857:
|
|
ret = regmap_update_bits(regmap, MAX77857_REG_CONT1,
|
|
MAX77857_CONT1_FREQ, switch_freq);
|
|
|
|
if (switch_freq >= 2)
|
|
break;
|
|
|
|
max77857_regulator_desc.ramp_delay_table = max77857_ramp_table[1];
|
|
max77857_regulator_desc.ramp_delay = max77857_ramp_table[1][0];
|
|
break;
|
|
case ID_MAX77859:
|
|
case ID_MAX77859A:
|
|
ret = regmap_update_bits(regmap, MAX77859_REG_CONT1,
|
|
MAX77857_CONT1_FREQ, switch_freq);
|
|
break;
|
|
}
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
cfg.dev = dev;
|
|
cfg.driver_data = (void *)id;
|
|
cfg.regmap = regmap;
|
|
cfg.init_data = of_get_regulator_init_data(dev, dev->of_node,
|
|
&max77857_regulator_desc);
|
|
if (!cfg.init_data)
|
|
return -ENOMEM;
|
|
|
|
rdev = devm_regulator_register(dev, &max77857_regulator_desc, &cfg);
|
|
if (IS_ERR(rdev))
|
|
return dev_err_probe(dev, PTR_ERR(rdev),
|
|
"cannot register regulator\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
const struct i2c_device_id max77857_id[] = {
|
|
{ "max77831", ID_MAX77831 },
|
|
{ "max77857", ID_MAX77857 },
|
|
{ "max77859", ID_MAX77859 },
|
|
{ "max77859a", ID_MAX77859A },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, max77857_id);
|
|
|
|
static const struct of_device_id max77857_of_id[] = {
|
|
{ .compatible = "adi,max77831", .data = (void *)ID_MAX77831 },
|
|
{ .compatible = "adi,max77857", .data = (void *)ID_MAX77857 },
|
|
{ .compatible = "adi,max77859", .data = (void *)ID_MAX77859 },
|
|
{ .compatible = "adi,max77859a", .data = (void *)ID_MAX77859A },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, max77857_of_id);
|
|
|
|
static struct i2c_driver max77857_driver = {
|
|
.driver = {
|
|
.name = "max77857",
|
|
.of_match_table = max77857_of_id,
|
|
},
|
|
.id_table = max77857_id,
|
|
.probe = max77857_probe,
|
|
};
|
|
module_i2c_driver(max77857_driver);
|
|
|
|
MODULE_DESCRIPTION("Analog Devices MAX77857 Buck-Boost Converter Driver");
|
|
MODULE_AUTHOR("Ibrahim Tilki <Ibrahim.Tilki@analog.com>");
|
|
MODULE_AUTHOR("Okan Sahin <Okan.Sahin@analog.com>");
|
|
MODULE_LICENSE("GPL");
|