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linux-next/drivers/regulator/act8865-regulator.c
Romain Perier 2b17fa2825 regulator: act8865: Add support to turn off all outputs 
When the property "poweroff-source" is found in the
devicetree, the function pm_power_off is defined. This function sends the
rights bit fields to the global off control register. shutdown/poweroff
commands are now supported for hardware components which use these PMU.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-22 16:59:52 +01:00

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/*
* 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>
/*
* 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] */
/*
* ACT8865 voltage number
*/
#define ACT8865_VOLTAGE_NUM 64
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 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,
};
#define ACT88xx_REG(_name, _family, _id, _vsel_reg) \
[_family##_ID_##_id] = { \
.name = _name, \
.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 act8846_regulators[] = {
ACT88xx_REG("REG1", ACT8846, REG1, VSET),
ACT88xx_REG("REG2", ACT8846, REG2, VSET0),
ACT88xx_REG("REG3", ACT8846, REG3, VSET0),
ACT88xx_REG("REG4", ACT8846, REG4, VSET0),
ACT88xx_REG("REG5", ACT8846, REG5, VSET),
ACT88xx_REG("REG6", ACT8846, REG6, VSET),
ACT88xx_REG("REG7", ACT8846, REG7, VSET),
ACT88xx_REG("REG8", ACT8846, REG8, VSET),
ACT88xx_REG("REG9", ACT8846, REG9, VSET),
ACT88xx_REG("REG10", ACT8846, REG10, VSET),
ACT88xx_REG("REG11", ACT8846, REG11, VSET),
ACT88xx_REG("REG12", ACT8846, REG12, VSET),
};
static const struct regulator_desc act8865_regulators[] = {
ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1),
ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1),
ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1),
ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET),
ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET),
ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET),
ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET),
};
#ifdef CONFIG_OF
static const struct of_device_id act8865_dt_ids[] = {
{ .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 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 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->platform_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].platform_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)
{
static 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;
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;
} else {
type = i2c_id->driver_data;
}
switch (type) {
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:
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_system_has_poweroff_source(dev->of_node)) {
if (!pm_power_off) {
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 = "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",
.owner = THIS_MODULE,
},
.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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