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alistair23-linux/drivers/regulator/act8865-regulator.c
Maarten ter Huurne 79b5d0266a regulator: act8865: Specify fixed voltage of 3.3V for ACT8600's REG9 
The documentation lists both 1.8V and 3.3V for this regulator output,
but 3.3V is mentioned more often and also matches what JZ4770 and
JZ4780 expect as an input.

Note that the voltage of REG9 is not programmable, so this commit only
changes the voltage reported in sysfs and debugfs, not the actual
output voltage of the hardware.

Signed-off-by: Maarten ter Huurne <maarten@treewalker.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-29 20:33:46 +09:00

563 lines
16 KiB
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Raw Blame History

/*
* act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs
*
* http://www.active-semi.com/products/power-management-units/act88xx/
*
* Copyright (C) 2013 Atmel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/act8865.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regmap.h>
/*
* ACT8600 Global Register Map.
*/
#define ACT8600_SYS_MODE 0x00
#define ACT8600_SYS_CTRL 0x01
#define ACT8600_DCDC1_VSET 0x10
#define ACT8600_DCDC1_CTRL 0x12
#define ACT8600_DCDC2_VSET 0x20
#define ACT8600_DCDC2_CTRL 0x22
#define ACT8600_DCDC3_VSET 0x30
#define ACT8600_DCDC3_CTRL 0x32
#define ACT8600_SUDCDC4_VSET 0x40
#define ACT8600_SUDCDC4_CTRL 0x41
#define ACT8600_LDO5_VSET 0x50
#define ACT8600_LDO5_CTRL 0x51
#define ACT8600_LDO6_VSET 0x60
#define ACT8600_LDO6_CTRL 0x61
#define ACT8600_LDO7_VSET 0x70
#define ACT8600_LDO7_CTRL 0x71
#define ACT8600_LDO8_VSET 0x80
#define ACT8600_LDO8_CTRL 0x81
#define ACT8600_LDO910_CTRL 0x91
#define ACT8600_APCH0 0xA1
#define ACT8600_APCH1 0xA8
#define ACT8600_APCH2 0xA9
#define ACT8600_APCH_STAT 0xAA
#define ACT8600_OTG0 0xB0
#define ACT8600_OTG1 0xB2
/*
* ACT8846 Global Register Map.
*/
#define ACT8846_SYS0 0x00
#define ACT8846_SYS1 0x01
#define ACT8846_REG1_VSET 0x10
#define ACT8846_REG1_CTRL 0x12
#define ACT8846_REG2_VSET0 0x20
#define ACT8846_REG2_VSET1 0x21
#define ACT8846_REG2_CTRL 0x22
#define ACT8846_REG3_VSET0 0x30
#define ACT8846_REG3_VSET1 0x31
#define ACT8846_REG3_CTRL 0x32
#define ACT8846_REG4_VSET0 0x40
#define ACT8846_REG4_VSET1 0x41
#define ACT8846_REG4_CTRL 0x42
#define ACT8846_REG5_VSET 0x50
#define ACT8846_REG5_CTRL 0x51
#define ACT8846_REG6_VSET 0x58
#define ACT8846_REG6_CTRL 0x59
#define ACT8846_REG7_VSET 0x60
#define ACT8846_REG7_CTRL 0x61
#define ACT8846_REG8_VSET 0x68
#define ACT8846_REG8_CTRL 0x69
#define ACT8846_REG9_VSET 0x70
#define ACT8846_REG9_CTRL 0x71
#define ACT8846_REG10_VSET 0x80
#define ACT8846_REG10_CTRL 0x81
#define ACT8846_REG11_VSET 0x90
#define ACT8846_REG11_CTRL 0x91
#define ACT8846_REG12_VSET 0xa0
#define ACT8846_REG12_CTRL 0xa1
#define ACT8846_REG13_CTRL 0xb1
#define ACT8846_GLB_OFF_CTRL 0xc3
#define ACT8846_OFF_SYSMASK 0x18
/*
* ACT8865 Global Register Map.
*/
#define ACT8865_SYS_MODE 0x00
#define ACT8865_SYS_CTRL 0x01
#define ACT8865_DCDC1_VSET1 0x20
#define ACT8865_DCDC1_VSET2 0x21
#define ACT8865_DCDC1_CTRL 0x22
#define ACT8865_DCDC2_VSET1 0x30
#define ACT8865_DCDC2_VSET2 0x31
#define ACT8865_DCDC2_CTRL 0x32
#define ACT8865_DCDC3_VSET1 0x40
#define ACT8865_DCDC3_VSET2 0x41
#define ACT8865_DCDC3_CTRL 0x42
#define ACT8865_LDO1_VSET 0x50
#define ACT8865_LDO1_CTRL 0x51
#define ACT8865_LDO2_VSET 0x54
#define ACT8865_LDO2_CTRL 0x55
#define ACT8865_LDO3_VSET 0x60
#define ACT8865_LDO3_CTRL 0x61
#define ACT8865_LDO4_VSET 0x64
#define ACT8865_LDO4_CTRL 0x65
#define ACT8865_MSTROFF 0x20
/*
* Field Definitions.
*/
#define ACT8865_ENA 0x80 /* ON - [7] */
#define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */
#define ACT8600_LDO10_ENA 0x40 /* ON - [6] */
#define ACT8600_SUDCDC_VSEL_MASK 0xFF /* SUDCDC VSET - [7:0] */
/*
* ACT8865 voltage number
*/
#define ACT8865_VOLTAGE_NUM 64
#define ACT8600_SUDCDC_VOLTAGE_NUM 255
struct act8865 {
struct regmap *regmap;
int off_reg;
int off_mask;
};
static const struct regmap_config act8865_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static const struct regulator_linear_range act8865_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
};
static const struct regulator_linear_range act8600_sudcdc_voltage_ranges[] = {
REGULATOR_LINEAR_RANGE(3000000, 0, 63, 0),
REGULATOR_LINEAR_RANGE(3000000, 64, 159, 100000),
REGULATOR_LINEAR_RANGE(12600000, 160, 191, 200000),
REGULATOR_LINEAR_RANGE(19000000, 191, 255, 400000),
};
static struct regulator_ops act8865_ops = {
.list_voltage = regulator_list_voltage_linear_range,
.map_voltage = regulator_map_voltage_linear_range,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static struct regulator_ops act8865_ldo_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
#define ACT88xx_REG(_name, _family, _id, _vsel_reg, _supply) \
[_family##_ID_##_id] = { \
.name = _name, \
.supply_name = _supply, \
.id = _family##_ID_##_id, \
.type = REGULATOR_VOLTAGE, \
.ops = &act8865_ops, \
.n_voltages = ACT8865_VOLTAGE_NUM, \
.linear_ranges = act8865_voltage_ranges, \
.n_linear_ranges = ARRAY_SIZE(act8865_voltage_ranges), \
.vsel_reg = _family##_##_id##_##_vsel_reg, \
.vsel_mask = ACT8865_VSEL_MASK, \
.enable_reg = _family##_##_id##_CTRL, \
.enable_mask = ACT8865_ENA, \
.owner = THIS_MODULE, \
}
static const struct regulator_desc act8600_regulators[] = {
ACT88xx_REG("DCDC1", ACT8600, DCDC1, VSET, "vp1"),
ACT88xx_REG("DCDC2", ACT8600, DCDC2, VSET, "vp2"),
ACT88xx_REG("DCDC3", ACT8600, DCDC3, VSET, "vp3"),
{
.name = "SUDCDC_REG4",
.id = ACT8600_ID_SUDCDC4,
.ops = &act8865_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = ACT8600_SUDCDC_VOLTAGE_NUM,
.linear_ranges = act8600_sudcdc_voltage_ranges,
.n_linear_ranges = ARRAY_SIZE(act8600_sudcdc_voltage_ranges),
.vsel_reg = ACT8600_SUDCDC4_VSET,
.vsel_mask = ACT8600_SUDCDC_VSEL_MASK,
.enable_reg = ACT8600_SUDCDC4_CTRL,
.enable_mask = ACT8865_ENA,
.owner = THIS_MODULE,
},
ACT88xx_REG("LDO5", ACT8600, LDO5, VSET, "inl"),
ACT88xx_REG("LDO6", ACT8600, LDO6, VSET, "inl"),
ACT88xx_REG("LDO7", ACT8600, LDO7, VSET, "inl"),
ACT88xx_REG("LDO8", ACT8600, LDO8, VSET, "inl"),
{
.name = "LDO_REG9",
.id = ACT8600_ID_LDO9,
.ops = &act8865_ldo_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = 1,
.fixed_uV = 3300000,
.enable_reg = ACT8600_LDO910_CTRL,
.enable_mask = ACT8865_ENA,
.owner = THIS_MODULE,
},
{
.name = "LDO_REG10",
.id = ACT8600_ID_LDO10,
.ops = &act8865_ldo_ops,
.type = REGULATOR_VOLTAGE,
.n_voltages = 1,
.fixed_uV = 1200000,
.enable_reg = ACT8600_LDO910_CTRL,
.enable_mask = ACT8600_LDO10_ENA,
.owner = THIS_MODULE,
},
};
static const struct regulator_desc act8846_regulators[] = {
ACT88xx_REG("REG1", ACT8846, REG1, VSET, "vp1"),
ACT88xx_REG("REG2", ACT8846, REG2, VSET0, "vp2"),
ACT88xx_REG("REG3", ACT8846, REG3, VSET0, "vp3"),
ACT88xx_REG("REG4", ACT8846, REG4, VSET0, "vp4"),
ACT88xx_REG("REG5", ACT8846, REG5, VSET, "inl1"),
ACT88xx_REG("REG6", ACT8846, REG6, VSET, "inl1"),
ACT88xx_REG("REG7", ACT8846, REG7, VSET, "inl1"),
ACT88xx_REG("REG8", ACT8846, REG8, VSET, "inl2"),
ACT88xx_REG("REG9", ACT8846, REG9, VSET, "inl2"),
ACT88xx_REG("REG10", ACT8846, REG10, VSET, "inl3"),
ACT88xx_REG("REG11", ACT8846, REG11, VSET, "inl3"),
ACT88xx_REG("REG12", ACT8846, REG12, VSET, "inl3"),
};
static const struct regulator_desc act8865_regulators[] = {
ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1, "vp1"),
ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1, "vp2"),
ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1, "vp3"),
ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
};
static const struct regulator_desc act8865_alt_regulators[] = {
ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET2, "vp1"),
ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET2, "vp2"),
ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET2, "vp3"),
ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET, "inl45"),
ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET, "inl45"),
ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET, "inl67"),
ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET, "inl67"),
};
#ifdef CONFIG_OF
static const struct of_device_id act8865_dt_ids[] = {
{ .compatible = "active-semi,act8600", .data = (void *)ACT8600 },
{ .compatible = "active-semi,act8846", .data = (void *)ACT8846 },
{ .compatible = "active-semi,act8865", .data = (void *)ACT8865 },
{ }
};
MODULE_DEVICE_TABLE(of, act8865_dt_ids);
static struct of_regulator_match act8846_matches[] = {
[ACT8846_ID_REG1] = { .name = "REG1" },
[ACT8846_ID_REG2] = { .name = "REG2" },
[ACT8846_ID_REG3] = { .name = "REG3" },
[ACT8846_ID_REG4] = { .name = "REG4" },
[ACT8846_ID_REG5] = { .name = "REG5" },
[ACT8846_ID_REG6] = { .name = "REG6" },
[ACT8846_ID_REG7] = { .name = "REG7" },
[ACT8846_ID_REG8] = { .name = "REG8" },
[ACT8846_ID_REG9] = { .name = "REG9" },
[ACT8846_ID_REG10] = { .name = "REG10" },
[ACT8846_ID_REG11] = { .name = "REG11" },
[ACT8846_ID_REG12] = { .name = "REG12" },
};
static struct of_regulator_match act8865_matches[] = {
[ACT8865_ID_DCDC1] = { .name = "DCDC_REG1"},
[ACT8865_ID_DCDC2] = { .name = "DCDC_REG2"},
[ACT8865_ID_DCDC3] = { .name = "DCDC_REG3"},
[ACT8865_ID_LDO1] = { .name = "LDO_REG1"},
[ACT8865_ID_LDO2] = { .name = "LDO_REG2"},
[ACT8865_ID_LDO3] = { .name = "LDO_REG3"},
[ACT8865_ID_LDO4] = { .name = "LDO_REG4"},
};
static struct of_regulator_match act8600_matches[] = {
[ACT8600_ID_DCDC1] = { .name = "DCDC_REG1"},
[ACT8600_ID_DCDC2] = { .name = "DCDC_REG2"},
[ACT8600_ID_DCDC3] = { .name = "DCDC_REG3"},
[ACT8600_ID_SUDCDC4] = { .name = "SUDCDC_REG4"},
[ACT8600_ID_LDO5] = { .name = "LDO_REG5"},
[ACT8600_ID_LDO6] = { .name = "LDO_REG6"},
[ACT8600_ID_LDO7] = { .name = "LDO_REG7"},
[ACT8600_ID_LDO8] = { .name = "LDO_REG8"},
[ACT8600_ID_LDO9] = { .name = "LDO_REG9"},
[ACT8600_ID_LDO10] = { .name = "LDO_REG10"},
};
static int act8865_pdata_from_dt(struct device *dev,
struct device_node **of_node,
struct act8865_platform_data *pdata,
unsigned long type)
{
int matched, i, num_matches;
struct device_node *np;
struct act8865_regulator_data *regulator;
struct of_regulator_match *matches;
np = of_get_child_by_name(dev->of_node, "regulators");
if (!np) {
dev_err(dev, "missing 'regulators' subnode in DT\n");
return -EINVAL;
}
switch (type) {
case ACT8600:
matches = act8600_matches;
num_matches = ARRAY_SIZE(act8600_matches);
break;
case ACT8846:
matches = act8846_matches;
num_matches = ARRAY_SIZE(act8846_matches);
break;
case ACT8865:
matches = act8865_matches;
num_matches = ARRAY_SIZE(act8865_matches);
break;
default:
dev_err(dev, "invalid device id %lu\n", type);
return -EINVAL;
}
matched = of_regulator_match(dev, np, matches, num_matches);
of_node_put(np);
if (matched <= 0)
return matched;
pdata->regulators = devm_kzalloc(dev,
sizeof(struct act8865_regulator_data) *
num_matches, GFP_KERNEL);
if (!pdata->regulators)
return -ENOMEM;
pdata->num_regulators = num_matches;
regulator = pdata->regulators;
for (i = 0; i < num_matches; i++) {
regulator->id = i;
regulator->name = matches[i].name;
regulator->init_data = matches[i].init_data;
of_node[i] = matches[i].of_node;
regulator++;
}
return 0;
}
#else
static inline int act8865_pdata_from_dt(struct device *dev,
struct device_node **of_node,
struct act8865_platform_data *pdata,
unsigned long type)
{
return 0;
}
#endif
static struct regulator_init_data
*act8865_get_init_data(int id, struct act8865_platform_data *pdata)
{
int i;
if (!pdata)
return NULL;
for (i = 0; i < pdata->num_regulators; i++) {
if (pdata->regulators[i].id == id)
return pdata->regulators[i].init_data;
}
return NULL;
}
static struct i2c_client *act8865_i2c_client;
static void act8865_power_off(void)
{
struct act8865 *act8865;
act8865 = i2c_get_clientdata(act8865_i2c_client);
regmap_write(act8865->regmap, act8865->off_reg, act8865->off_mask);
while (1);
}
static int act8865_pmic_probe(struct i2c_client *client,
const struct i2c_device_id *i2c_id)
{
const struct regulator_desc *regulators;
struct act8865_platform_data pdata_of, *pdata;
struct device *dev = &client->dev;
struct device_node **of_node;
int i, ret, num_regulators;
struct act8865 *act8865;
unsigned long type;
int off_reg, off_mask;
int voltage_select = 0;
pdata = dev_get_platdata(dev);
if (dev->of_node && !pdata) {
const struct of_device_id *id;
id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
if (!id)
return -ENODEV;
type = (unsigned long) id->data;
voltage_select = !!of_get_property(dev->of_node,
"active-semi,vsel-high",
NULL);
} else {
type = i2c_id->driver_data;
}
switch (type) {
case ACT8600:
regulators = act8600_regulators;
num_regulators = ARRAY_SIZE(act8600_regulators);
off_reg = -1;
off_mask = -1;
break;
case ACT8846:
regulators = act8846_regulators;
num_regulators = ARRAY_SIZE(act8846_regulators);
off_reg = ACT8846_GLB_OFF_CTRL;
off_mask = ACT8846_OFF_SYSMASK;
break;
case ACT8865:
if (voltage_select) {
regulators = act8865_alt_regulators;
num_regulators = ARRAY_SIZE(act8865_alt_regulators);
} else {
regulators = act8865_regulators;
num_regulators = ARRAY_SIZE(act8865_regulators);
}
off_reg = ACT8865_SYS_CTRL;
off_mask = ACT8865_MSTROFF;
break;
default:
dev_err(dev, "invalid device id %lu\n", type);
return -EINVAL;
}
of_node = devm_kzalloc(dev, sizeof(struct device_node *) *
num_regulators, GFP_KERNEL);
if (!of_node)
return -ENOMEM;
if (dev->of_node && !pdata) {
ret = act8865_pdata_from_dt(dev, of_node, &pdata_of, type);
if (ret < 0)
return ret;
pdata = &pdata_of;
}
if (pdata->num_regulators > num_regulators) {
dev_err(dev, "too many regulators: %d\n",
pdata->num_regulators);
return -EINVAL;
}
act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL);
if (!act8865)
return -ENOMEM;
act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config);
if (IS_ERR(act8865->regmap)) {
ret = PTR_ERR(act8865->regmap);
dev_err(&client->dev, "Failed to allocate register map: %d\n",
ret);
return ret;
}
if (of_device_is_system_power_controller(dev->of_node)) {
if (!pm_power_off && (off_reg > 0)) {
act8865_i2c_client = client;
act8865->off_reg = off_reg;
act8865->off_mask = off_mask;
pm_power_off = act8865_power_off;
} else {
dev_err(dev, "Failed to set poweroff capability, already defined\n");
}
}
/* Finally register devices */
for (i = 0; i < num_regulators; i++) {
const struct regulator_desc *desc = &regulators[i];
struct regulator_config config = { };
struct regulator_dev *rdev;
config.dev = dev;
config.init_data = act8865_get_init_data(desc->id, pdata);
config.of_node = of_node[i];
config.driver_data = act8865;
config.regmap = act8865->regmap;
rdev = devm_regulator_register(&client->dev, desc, &config);
if (IS_ERR(rdev)) {
dev_err(dev, "failed to register %s\n", desc->name);
return PTR_ERR(rdev);
}
}
i2c_set_clientdata(client, act8865);
devm_kfree(dev, of_node);
return 0;
}
static const struct i2c_device_id act8865_ids[] = {
{ .name = "act8600", .driver_data = ACT8600 },
{ .name = "act8846", .driver_data = ACT8846 },
{ .name = "act8865", .driver_data = ACT8865 },
{ },
};
MODULE_DEVICE_TABLE(i2c, act8865_ids);
static struct i2c_driver act8865_pmic_driver = {
.driver = {
.name = "act8865",
},
.probe = act8865_pmic_probe,
.id_table = act8865_ids,
};
module_i2c_driver(act8865_pmic_driver);
MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver");
MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
MODULE_LICENSE("GPL v2");
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