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/*
* da9211-regulator.c - Regulator device driver for DA9211/DA9212
* /DA9213/DA9223/DA9214/DA9224/DA9215/DA9225
* Copyright (C) 2015 Dialog Semiconductor Ltd.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*/
#include <linux/err.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regmap.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/of_gpio.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/da9211.h>
#include "da9211-regulator.h"
/* DEVICE IDs */
#define DA9211_DEVICE_ID 0x22
#define DA9213_DEVICE_ID 0x23
#define DA9215_DEVICE_ID 0x24
#define DA9211_BUCK_MODE_SLEEP 1
#define DA9211_BUCK_MODE_SYNC 2
#define DA9211_BUCK_MODE_AUTO 3
/* DA9211 REGULATOR IDs */
#define DA9211_ID_BUCKA 0
#define DA9211_ID_BUCKB 1
struct da9211 {
struct device *dev;
struct regmap *regmap;
struct da9211_pdata *pdata;
struct regulator_dev *rdev[DA9211_MAX_REGULATORS];
int num_regulator;
int chip_irq;
int chip_id;
};
static const struct regmap_range_cfg da9211_regmap_range[] = {
{
.selector_reg = DA9211_REG_PAGE_CON,
.selector_mask = DA9211_REG_PAGE_MASK,
.selector_shift = DA9211_REG_PAGE_SHIFT,
.window_start = 0,
.window_len = 256,
.range_min = 0,
.range_max = 5*128,
},
};
static const struct regmap_config da9211_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 5 * 128,
.ranges = da9211_regmap_range,
.num_ranges = ARRAY_SIZE(da9211_regmap_range),
};
/* Default limits measured in millivolts and milliamps */
#define DA9211_MIN_MV 300
#define DA9211_MAX_MV 1570
#define DA9211_STEP_MV 10
/* Current limits for DA9211 buck (uA) indices
* corresponds with register values
*/
static const int da9211_current_limits[] = {
2000000, 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000,
3600000, 3800000, 4000000, 4200000, 4400000, 4600000, 4800000, 5000000
};
/* Current limits for DA9213 buck (uA) indices
* corresponds with register values
*/
static const int da9213_current_limits[] = {
3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
};
/* Current limits for DA9215 buck (uA) indices
* corresponds with register values
*/
static const int da9215_current_limits[] = {
4000000, 4200000, 4400000, 4600000, 4800000, 5000000, 5200000, 5400000,
5600000, 5800000, 6000000, 6200000, 6400000, 6600000, 6800000, 7000000
};
static unsigned int da9211_buck_get_mode(struct regulator_dev *rdev)
{
int id = rdev_get_id(rdev);
struct da9211 *chip = rdev_get_drvdata(rdev);
unsigned int data;
int ret, mode = 0;
ret = regmap_read(chip->regmap, DA9211_REG_BUCKA_CONF+id, &data);
if (ret < 0)
return ret;
switch (data & 0x03) {
case DA9211_BUCK_MODE_SYNC:
mode = REGULATOR_MODE_FAST;
break;
case DA9211_BUCK_MODE_AUTO:
mode = REGULATOR_MODE_NORMAL;
break;
case DA9211_BUCK_MODE_SLEEP:
mode = REGULATOR_MODE_STANDBY;
break;
}
return mode;
}
static int da9211_buck_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
int id = rdev_get_id(rdev);
struct da9211 *chip = rdev_get_drvdata(rdev);
int val = 0;
switch (mode) {
case REGULATOR_MODE_FAST:
val = DA9211_BUCK_MODE_SYNC;
break;
case REGULATOR_MODE_NORMAL:
val = DA9211_BUCK_MODE_AUTO;
break;
case REGULATOR_MODE_STANDBY:
val = DA9211_BUCK_MODE_SLEEP;
break;
}
return regmap_update_bits(chip->regmap, DA9211_REG_BUCKA_CONF+id,
0x03, val);
}
static int da9211_set_current_limit(struct regulator_dev *rdev, int min,
int max)
{
int id = rdev_get_id(rdev);
struct da9211 *chip = rdev_get_drvdata(rdev);
int i, max_size;
const int *current_limits;
switch (chip->chip_id) {
case DA9211:
current_limits = da9211_current_limits;
max_size = ARRAY_SIZE(da9211_current_limits)-1;
break;
case DA9213:
current_limits = da9213_current_limits;
max_size = ARRAY_SIZE(da9213_current_limits)-1;
break;
case DA9215:
current_limits = da9215_current_limits;
max_size = ARRAY_SIZE(da9215_current_limits)-1;
break;
default:
return -EINVAL;
}
/* search for closest to maximum */
for (i = max_size; i >= 0; i--) {
if (min <= current_limits[i] &&
max >= current_limits[i]) {
return regmap_update_bits(chip->regmap,
DA9211_REG_BUCK_ILIM,
(0x0F << id*4), (i << id*4));
}
}
return -EINVAL;
}
static int da9211_get_current_limit(struct regulator_dev *rdev)
{
int id = rdev_get_id(rdev);
struct da9211 *chip = rdev_get_drvdata(rdev);
unsigned int data;
int ret;
const int *current_limits;
switch (chip->chip_id) {
case DA9211:
current_limits = da9211_current_limits;
break;
case DA9213:
current_limits = da9213_current_limits;
break;
case DA9215:
current_limits = da9215_current_limits;
break;
default:
return -EINVAL;
}
ret = regmap_read(chip->regmap, DA9211_REG_BUCK_ILIM, &data);
if (ret < 0)
return ret;
/* select one of 16 values: 0000 (2000mA or 3000mA)
* to 1111 (5000mA or 6000mA).
*/
data = (data >> id*4) & 0x0F;
return current_limits[data];
}
static const struct regulator_ops da9211_buck_ops = {
.get_mode = da9211_buck_get_mode,
.set_mode = da9211_buck_set_mode,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_current_limit = da9211_set_current_limit,
.get_current_limit = da9211_get_current_limit,
};
#define DA9211_BUCK(_id) \
{\
.name = #_id,\
.ops = &da9211_buck_ops,\
.type = REGULATOR_VOLTAGE,\
.id = DA9211_ID_##_id,\
.n_voltages = (DA9211_MAX_MV - DA9211_MIN_MV) / DA9211_STEP_MV + 1,\
.min_uV = (DA9211_MIN_MV * 1000),\
.uV_step = (DA9211_STEP_MV * 1000),\
.enable_reg = DA9211_REG_BUCKA_CONT + DA9211_ID_##_id,\
.enable_mask = DA9211_BUCKA_EN,\
.vsel_reg = DA9211_REG_VBUCKA_A + DA9211_ID_##_id * 2,\
.vsel_mask = DA9211_VBUCK_MASK,\
.owner = THIS_MODULE,\
}
static struct regulator_desc da9211_regulators[] = {
DA9211_BUCK(BUCKA),
DA9211_BUCK(BUCKB),
};
#ifdef CONFIG_OF
static struct of_regulator_match da9211_matches[] = {
[DA9211_ID_BUCKA] = { .name = &qu
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