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linux-next/drivers/regulator/pfuze100-regulator.c
Axel Lin 6b8430c3f3 regulator: pfuze100: Fix off-by-one for max_register setting 
max_register should be register count - 1.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Robin Gong <b38343@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
2013-08-02 11:29:00 +01:00

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/*
* Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/regulator/of_regulator.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/pfuze100.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/regmap.h>
#define PFUZE_NUMREGS 128
#define PFUZE100_VOL_OFFSET 0
#define PFUZE100_STANDBY_OFFSET 1
#define PFUZE100_MODE_OFFSET 3
#define PFUZE100_CONF_OFFSET 4
#define PFUZE100_DEVICEID 0x0
#define PFUZE100_REVID 0x3
#define PFUZE100_FABID 0x3
#define PFUZE100_SW1ABVOL 0x20
#define PFUZE100_SW1CVOL 0x2e
#define PFUZE100_SW2VOL 0x35
#define PFUZE100_SW3AVOL 0x3c
#define PFUZE100_SW3BVOL 0x43
#define PFUZE100_SW4VOL 0x4a
#define PFUZE100_SWBSTCON1 0x66
#define PFUZE100_VREFDDRCON 0x6a
#define PFUZE100_VSNVSVOL 0x6b
#define PFUZE100_VGEN1VOL 0x6c
#define PFUZE100_VGEN2VOL 0x6d
#define PFUZE100_VGEN3VOL 0x6e
#define PFUZE100_VGEN4VOL 0x6f
#define PFUZE100_VGEN5VOL 0x70
#define PFUZE100_VGEN6VOL 0x71
struct pfuze_regulator {
struct regulator_desc desc;
unsigned char stby_reg;
unsigned char stby_mask;
};
struct pfuze_chip {
struct regmap *regmap;
struct device *dev;
struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
};
static const int pfuze100_swbst[] = {
5000000, 5050000, 5100000, 5150000,
};
static const int pfuze100_vsnvs[] = {
1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
};
static const struct i2c_device_id pfuze_device_id[] = {
{.name = "pfuze100"},
{},
};
MODULE_DEVICE_TABLE(i2c, pfuze_device_id);
static const struct of_device_id pfuze_dt_ids[] = {
{ .compatible = "fsl,pfuze100" },
{},
};
MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
{
struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
int id = rdev->desc->id;
unsigned int ramp_bits;
int ret;
if (id < PFUZE100_SWBST) {
ramp_delay = 12500 / ramp_delay;
ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
ret = regmap_update_bits(pfuze100->regmap,
rdev->desc->vsel_reg + 4,
0xc0, ramp_bits << 6);
if (ret < 0)
dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
} else
ret = -EACCES;
return ret;
}
static struct regulator_ops pfuze100_ldo_regulator_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
static struct regulator_ops pfuze100_fixed_regulator_ops = {
.list_voltage = regulator_list_voltage_linear,
};
static struct regulator_ops pfuze100_sw_regulator_ops = {
.list_voltage = regulator_list_voltage_linear,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_ramp_delay = pfuze100_set_ramp_delay,
};
static struct regulator_ops pfuze100_swb_regulator_ops = {
.list_voltage = regulator_list_voltage_table,
.map_voltage = regulator_map_voltage_ascend,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
};
#define PFUZE100_FIXED_REG(_name, base, voltage) \
[PFUZE100_ ## _name] = { \
.desc = { \
.name = #_name, \
.n_voltages = 1, \
.ops = &pfuze100_fixed_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = PFUZE100_ ## _name, \
.owner = THIS_MODULE, \
.min_uV = (voltage), \
.enable_reg = (base), \
.enable_mask = 0x10, \
}, \
}
#define PFUZE100_SW_REG(_name, base, min, max, step) \
[PFUZE100_ ## _name] = { \
.desc = { \
.name = #_name,\
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &pfuze100_sw_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = PFUZE100_ ## _name, \
.owner = THIS_MODULE, \
.min_uV = (min), \
.uV_step = (step), \
.vsel_reg = (base) + PFUZE100_VOL_OFFSET, \
.vsel_mask = 0x3f, \
}, \
.stby_reg = (base) + PFUZE100_STANDBY_OFFSET, \
.stby_mask = 0x3f, \
}
#define PFUZE100_SWB_REG(_name, base, mask, voltages) \
[PFUZE100_ ## _name] = { \
.desc = { \
.name = #_name, \
.n_voltages = ARRAY_SIZE(voltages), \
.ops = &pfuze100_swb_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = PFUZE100_ ## _name, \
.owner = THIS_MODULE, \
.volt_table = voltages, \
.vsel_reg = (base), \
.vsel_mask = (mask), \
}, \
}
#define PFUZE100_VGEN_REG(_name, base, min, max, step) \
[PFUZE100_ ## _name] = { \
.desc = { \
.name = #_name, \
.n_voltages = ((max) - (min)) / (step) + 1, \
.ops = &pfuze100_ldo_regulator_ops, \
.type = REGULATOR_VOLTAGE, \
.id = PFUZE100_ ## _name, \
.owner = THIS_MODULE, \
.min_uV = (min), \
.uV_step = (step), \
.vsel_reg = (base), \
.vsel_mask = 0xf, \
.enable_reg = (base), \
.enable_mask = 0x10, \
}, \
.stby_reg = (base), \
.stby_mask = 0x20, \
}
static struct pfuze_regulator pfuze100_regulators[] = {
PFUZE100_SW_REG(SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
PFUZE100_SW_REG(SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
PFUZE100_SW_REG(SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
PFUZE100_SW_REG(SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
PFUZE100_SW_REG(SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
PFUZE100_SW_REG(SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
PFUZE100_SWB_REG(SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
PFUZE100_SWB_REG(VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
PFUZE100_FIXED_REG(VREFDDR, PFUZE100_VREFDDRCON, 750000),
PFUZE100_VGEN_REG(VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
PFUZE100_VGEN_REG(VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
PFUZE100_VGEN_REG(VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
PFUZE100_VGEN_REG(VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
};
#ifdef CONFIG_OF
static struct of_regulator_match pfuze100_matches[] = {
{ .name = "sw1ab", },
{ .name = "sw1c", },
{ .name = "sw2", },
{ .name = "sw3a", },
{ .name = "sw3b", },
{ .name = "sw4", },
{ .name = "swbst", },
{ .name = "vsnvs", },
{ .name = "vrefddr", },
{ .name = "vgen1", },
{ .name = "vgen2", },
{ .name = "vgen3", },
{ .name = "vgen4", },
{ .name = "vgen5", },
{ .name = "vgen6", },
};
static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
{
struct device *dev = chip->dev;
struct device_node *np, *parent;
int ret;
np = of_node_get(dev->parent->of_node);
if (!np)
return 0;
parent = of_find_node_by_name(np, "regulators");
if (!parent) {
dev_err(dev, "regulators node not found\n");
return -EINVAL;
}
ret = of_regulator_match(dev, parent, pfuze100_matches,
ARRAY_SIZE(pfuze100_matches));
of_node_put(parent);
if (ret < 0) {
dev_err(dev, "Error parsing regulator init data: %d\n",
ret);
return ret;
}
return 0;
}
static inline struct regulator_init_data *match_init_data(int index)
{
return pfuze100_matches[index].init_data;
}
static inline struct device_node *match_of_node(int index)
{
return pfuze100_matches[index].of_node;
}
#else
static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
{
return 0;
}
static inline struct regulator_init_data *match_init_data(int index)
{
return NULL;
}
static inline struct device_node *match_of_node(int index)
{
return NULL;
}
#endif
static int pfuze_identify(struct pfuze_chip *pfuze_chip)
{
unsigned int value;
int ret;
ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
if (ret)
return ret;
if (value & 0x0f) {
dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
return -ENODEV;
}
ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
if (ret)
return ret;
dev_info(pfuze_chip->dev,
"Full lay: %x, Metal lay: %x\n",
(value & 0xf0) >> 4, value & 0x0f);
ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
if (ret)
return ret;
dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
(value & 0xc) >> 2, value & 0x3);
return 0;
}
static const struct regmap_config pfuze_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = PFUZE_NUMREGS - 1,
.cache_type = REGCACHE_RBTREE,
};
static int pfuze100_regulator_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct pfuze_chip *pfuze_chip;
struct pfuze_regulator_platform_data *pdata =
dev_get_platdata(&client->dev);
struct regulator_config config = { };
int i, ret;
pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
GFP_KERNEL);
if (!pfuze_chip)
return -ENOMEM;
i2c_set_clientdata(client, pfuze_chip);
memcpy(pfuze_chip->regulator_descs, pfuze100_regulators,
sizeof(pfuze_chip->regulator_descs));
pfuze_chip->dev = &client->dev;
pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
if (IS_ERR(pfuze_chip->regmap)) {
ret = PTR_ERR(pfuze_chip->regmap);
dev_err(&client->dev,
"regmap allocation failed with err %d\n", ret);
return ret;
}
ret = pfuze_identify(pfuze_chip);
if (ret) {
dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
return ret;
}
ret = pfuze_parse_regulators_dt(pfuze_chip);
if (ret)
return ret;
for (i = 0; i < PFUZE100_MAX_REGULATOR; i++) {
struct regulator_init_data *init_data;
struct regulator_desc *desc;
int val;
desc = &pfuze_chip->regulator_descs[i].desc;
if (pdata)
init_data = pdata->init_data[i];
else
init_data = match_init_data(i);
/* SW2~SW4 high bit check and modify the voltage value table */
if (i > PFUZE100_SW1C && i < PFUZE100_SWBST) {
regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
if (val & 0x40) {
desc->min_uV = 800000;
desc->uV_step = 50000;
desc->n_voltages = 51;
}
}
config.dev = &client->dev;
config.init_data = init_data;
config.driver_data = pfuze_chip;
config.of_node = match_of_node(i);
pfuze_chip->regulators[i] = regulator_register(desc, &config);
if (IS_ERR(pfuze_chip->regulators[i])) {
dev_err(&client->dev, "register regulator%s failed\n",
pfuze100_regulators[i].desc.name);
ret = PTR_ERR(pfuze_chip->regulators[i]);
while (--i >= 0)
regulator_unregister(pfuze_chip->regulators[i]);
return ret;
}
}
return 0;
}
static int pfuze100_regulator_remove(struct i2c_client *client)
{
int i;
struct pfuze_chip *pfuze_chip = i2c_get_clientdata(client);
for (i = 0; i < PFUZE100_MAX_REGULATOR; i++)
regulator_unregister(pfuze_chip->regulators[i]);
return 0;
}
static struct i2c_driver pfuze_driver = {
.id_table = pfuze_device_id,
.driver = {
.name = "pfuze100-regulator",
.owner = THIS_MODULE,
.of_match_table = pfuze_dt_ids,
},
.probe = pfuze100_regulator_probe,
.remove = pfuze100_regulator_remove,
};
module_i2c_driver(pfuze_driver);
MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100 PMIC");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("i2c:pfuze100-regulator");
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