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linux/drivers/regulator/pv88080-regulator.c
Bhumika Goyal d4fdf5e14e regulator: pv88080-regulator: constify regulator_ops structure 
Declare regulator_ops structure as const as it is only stored in the ops
field of a regulator_desc structure. This field is of type const, so
regulator_ops structures having this property can be made const too.

File size before: drivers/regulator/pv88080-regulator.o
   text	   data	    bss	    dec	    hex	filename
   3828	   1808	      8	   5644	   160c regulator/pv88080-regulator.o

File size after: drivers/regulator/pv88080-regulator.o
   text	   data	    bss	    dec	    hex	filename
   4340	   1296	      8	   5644	   160c regulator/pv88080-regulator.o

Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-01-31 20:59:01 +00:00

622 lines
17 KiB
C
Raw Blame History

/*
* pv88080-regulator.c - Regulator device driver for PV88080
* Copyright (C) 2016 Powerventure Semiconductor Ltd.
*
* 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/err.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.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/regulator/of_regulator.h>
#include "pv88080-regulator.h"
#define PV88080_MAX_REGULATORS 4
/* PV88080 REGULATOR IDs */
enum {
/* BUCKs */
PV88080_ID_BUCK1,
PV88080_ID_BUCK2,
PV88080_ID_BUCK3,
PV88080_ID_HVBUCK,
};
enum pv88080_types {
TYPE_PV88080_AA,
TYPE_PV88080_BA,
};
struct pv88080_regulator {
struct regulator_desc desc;
/* Current limiting */
unsigned int n_current_limits;
const int *current_limits;
unsigned int limit_mask;
unsigned int mode_reg;
unsigned int limit_reg;
unsigned int conf2;
unsigned int conf5;
};
struct pv88080 {
struct device *dev;
struct regmap *regmap;
struct regulator_dev *rdev[PV88080_MAX_REGULATORS];
unsigned long type;
const struct pv88080_compatible_regmap *regmap_config;
};
struct pv88080_buck_voltage {
int min_uV;
int max_uV;
int uV_step;
};
struct pv88080_buck_regmap {
/* REGS */
int buck_enable_reg;
int buck_vsel_reg;
int buck_mode_reg;
int buck_limit_reg;
int buck_vdac_range_reg;
int buck_vrange_gain_reg;
/* MASKS */
int buck_enable_mask;
int buck_vsel_mask;
int buck_limit_mask;
};
struct pv88080_compatible_regmap {
/* BUCK1, 2, 3 */
struct pv88080_buck_regmap buck_regmap[PV88080_MAX_REGULATORS-1];
/* HVBUCK */
int hvbuck_enable_reg;
int hvbuck_vsel_reg;
int hvbuck_enable_mask;
int hvbuck_vsel_mask;
};
static const struct regmap_config pv88080_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
/* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
* Entry indexes corresponds to register values.
*/
static const int pv88080_buck1_limits[] = {
3230000, 5130000, 6960000, 8790000
};
static const int pv88080_buck23_limits[] = {
1496000, 2393000, 3291000, 4189000
};
static const struct pv88080_buck_voltage pv88080_buck_vol[2] = {
{
.min_uV = 600000,
.max_uV = 1393750,
.uV_step = 6250,
},
{
.min_uV = 1400000,
.max_uV = 2193750,
.uV_step = 6250,
},
};
static const struct pv88080_compatible_regmap pv88080_aa_regs = {
/* BUCK1 */
.buck_regmap[0] = {
.buck_enable_reg = PV88080AA_REG_BUCK1_CONF0,
.buck_vsel_reg = PV88080AA_REG_BUCK1_CONF0,
.buck_mode_reg = PV88080AA_REG_BUCK1_CONF1,
.buck_limit_reg = PV88080AA_REG_BUCK1_CONF1,
.buck_vdac_range_reg = PV88080AA_REG_BUCK1_CONF2,
.buck_vrange_gain_reg = PV88080AA_REG_BUCK1_CONF5,
.buck_enable_mask = PV88080_BUCK1_EN,
.buck_vsel_mask = PV88080_VBUCK1_MASK,
.buck_limit_mask = PV88080_BUCK1_ILIM_MASK,
},
/* BUCK2 */
.buck_regmap[1] = {
.buck_enable_reg = PV88080AA_REG_BUCK2_CONF0,
.buck_vsel_reg = PV88080AA_REG_BUCK2_CONF0,
.buck_mode_reg = PV88080AA_REG_BUCK2_CONF1,
.buck_limit_reg = PV88080AA_REG_BUCK2_CONF1,
.buck_vdac_range_reg = PV88080AA_REG_BUCK2_CONF2,
.buck_vrange_gain_reg = PV88080AA_REG_BUCK2_CONF5,
.buck_enable_mask = PV88080_BUCK2_EN,
.buck_vsel_mask = PV88080_VBUCK2_MASK,
.buck_limit_mask = PV88080_BUCK2_ILIM_MASK,
},
/* BUCK3 */
.buck_regmap[2] = {
.buck_enable_reg = PV88080AA_REG_BUCK3_CONF0,
.buck_vsel_reg = PV88080AA_REG_BUCK3_CONF0,
.buck_mode_reg = PV88080AA_REG_BUCK3_CONF1,
.buck_limit_reg = PV88080AA_REG_BUCK3_CONF1,
.buck_vdac_range_reg = PV88080AA_REG_BUCK3_CONF2,
.buck_vrange_gain_reg = PV88080AA_REG_BUCK3_CONF5,
.buck_enable_mask = PV88080_BUCK3_EN,
.buck_vsel_mask = PV88080_VBUCK3_MASK,
.buck_limit_mask = PV88080_BUCK3_ILIM_MASK,
},
/* HVBUCK */
.hvbuck_enable_reg = PV88080AA_REG_HVBUCK_CONF2,
.hvbuck_vsel_reg = PV88080AA_REG_HVBUCK_CONF1,
.hvbuck_enable_mask = PV88080_HVBUCK_EN,
.hvbuck_vsel_mask = PV88080_VHVBUCK_MASK,
};
static const struct pv88080_compatible_regmap pv88080_ba_regs = {
/* BUCK1 */
.buck_regmap[0] = {
.buck_enable_reg = PV88080BA_REG_BUCK1_CONF0,
.buck_vsel_reg = PV88080BA_REG_BUCK1_CONF0,
.buck_mode_reg = PV88080BA_REG_BUCK1_CONF1,
.buck_limit_reg = PV88080BA_REG_BUCK1_CONF1,
.buck_vdac_range_reg = PV88080BA_REG_BUCK1_CONF2,
.buck_vrange_gain_reg = PV88080BA_REG_BUCK1_CONF5,
.buck_enable_mask = PV88080_BUCK1_EN,
.buck_vsel_mask = PV88080_VBUCK1_MASK,
.buck_limit_mask = PV88080_BUCK1_ILIM_MASK,
},
/* BUCK2 */
.buck_regmap[1] = {
.buck_enable_reg = PV88080BA_REG_BUCK2_CONF0,
.buck_vsel_reg = PV88080BA_REG_BUCK2_CONF0,
.buck_mode_reg = PV88080BA_REG_BUCK2_CONF1,
.buck_limit_reg = PV88080BA_REG_BUCK2_CONF1,
.buck_vdac_range_reg = PV88080BA_REG_BUCK2_CONF2,
.buck_vrange_gain_reg = PV88080BA_REG_BUCK2_CONF5,
.buck_enable_mask = PV88080_BUCK2_EN,
.buck_vsel_mask = PV88080_VBUCK2_MASK,
.buck_limit_mask = PV88080_BUCK2_ILIM_MASK,
},
/* BUCK3 */
.buck_regmap[2] = {
.buck_enable_reg = PV88080BA_REG_BUCK3_CONF0,
.buck_vsel_reg = PV88080BA_REG_BUCK3_CONF0,
.buck_mode_reg = PV88080BA_REG_BUCK3_CONF1,
.buck_limit_reg = PV88080BA_REG_BUCK3_CONF1,
.buck_vdac_range_reg = PV88080BA_REG_BUCK3_CONF2,
.buck_vrange_gain_reg = PV88080BA_REG_BUCK3_CONF5,
.buck_enable_mask = PV88080_BUCK3_EN,
.buck_vsel_mask = PV88080_VBUCK3_MASK,
.buck_limit_mask = PV88080_BUCK3_ILIM_MASK,
},
/* HVBUCK */
.hvbuck_enable_reg = PV88080BA_REG_HVBUCK_CONF2,
.hvbuck_vsel_reg = PV88080BA_REG_HVBUCK_CONF1,
.hvbuck_enable_mask = PV88080_HVBUCK_EN,
.hvbuck_vsel_mask = PV88080_VHVBUCK_MASK,
};
#ifdef CONFIG_OF
static const struct of_device_id pv88080_dt_ids[] = {
{ .compatible = "pvs,pv88080", .data = (void *)TYPE_PV88080_AA },
{ .compatible = "pvs,pv88080-aa", .data = (void *)TYPE_PV88080_AA },
{ .compatible = "pvs,pv88080-ba", .data = (void *)TYPE_PV88080_BA },
{},
};
MODULE_DEVICE_TABLE(of, pv88080_dt_ids);
#endif
static unsigned int pv88080_buck_get_mode(struct regulator_dev *rdev)
{
struct pv88080_regulator *info = rdev_get_drvdata(rdev);
unsigned int data;
int ret, mode = 0;
ret = regmap_read(rdev->regmap, info->mode_reg, &data);
if (ret < 0)
return ret;
switch (data & PV88080_BUCK1_MODE_MASK) {
case PV88080_BUCK_MODE_SYNC:
mode = REGULATOR_MODE_FAST;
break;
case PV88080_BUCK_MODE_AUTO:
mode = REGULATOR_MODE_NORMAL;
break;
case PV88080_BUCK_MODE_SLEEP:
mode = REGULATOR_MODE_STANDBY;
break;
default:
return -EINVAL;
}
return mode;
}
static int pv88080_buck_set_mode(struct regulator_dev *rdev,
unsigned int mode)
{
struct pv88080_regulator *info = rdev_get_drvdata(rdev);
int val = 0;
switch (mode) {
case REGULATOR_MODE_FAST:
val = PV88080_BUCK_MODE_SYNC;
break;
case REGULATOR_MODE_NORMAL:
val = PV88080_BUCK_MODE_AUTO;
break;
case REGULATOR_MODE_STANDBY:
val = PV88080_BUCK_MODE_SLEEP;
break;
default:
return -EINVAL;
}
return regmap_update_bits(rdev->regmap, info->mode_reg,
PV88080_BUCK1_MODE_MASK, val);
}
static int pv88080_set_current_limit(struct regulator_dev *rdev, int min,
int max)
{
struct pv88080_regulator *info = rdev_get_drvdata(rdev);
int i;
/* search for closest to maximum */
for (i = info->n_current_limits; i >= 0; i--) {
if (min <= info->current_limits[i]
&& max >= info->current_limits[i]) {
return regmap_update_bits(rdev->regmap,
info->limit_reg,
info->limit_mask,
i << PV88080_BUCK1_ILIM_SHIFT);
}
}
return -EINVAL;
}
static int pv88080_get_current_limit(struct regulator_dev *rdev)
{
struct pv88080_regulator *info = rdev_get_drvdata(rdev);
unsigned int data;
int ret;
ret = regmap_read(rdev->regmap, info->limit_reg, &data);
if (ret < 0)
return ret;
data = (data & info->limit_mask) >> PV88080_BUCK1_ILIM_SHIFT;
return info->current_limits[data];
}
static const struct regulator_ops pv88080_buck_ops = {
.get_mode = pv88080_buck_get_mode,
.set_mode = pv88080_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 = pv88080_set_current_limit,
.get_current_limit = pv88080_get_current_limit,
};
static const struct regulator_ops pv88080_hvbuck_ops = {
.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,
};
#define PV88080_BUCK(chip, regl_name, min, step, max, limits_array) \
{\
.desc = {\
.id = chip##_ID_##regl_name,\
.name = __stringify(chip##_##regl_name),\
.of_match = of_match_ptr(#regl_name),\
.regulators_node = of_match_ptr("regulators"),\
.type = REGULATOR_VOLTAGE,\
.owner = THIS_MODULE,\
.ops = &pv88080_buck_ops,\
.min_uV = min, \
.uV_step = step, \
.n_voltages = ((max) - (min))/(step) + 1, \
},\
.current_limits = limits_array, \
.n_current_limits = ARRAY_SIZE(limits_array), \
}
#define PV88080_HVBUCK(chip, regl_name, min, step, max) \
{\
.desc = {\
.id = chip##_ID_##regl_name,\
.name = __stringify(chip##_##regl_name),\
.of_match = of_match_ptr(#regl_name),\
.regulators_node = of_match_ptr("regulators"),\
.type = REGULATOR_VOLTAGE,\
.owner = THIS_MODULE,\
.ops = &pv88080_hvbuck_ops,\
.min_uV = min, \
.uV_step = step, \
.n_voltages = ((max) - (min))/(step) + 1, \
},\
}
static struct pv88080_regulator pv88080_regulator_info[] = {
PV88080_BUCK(PV88080, BUCK1, 600000, 6250, 1393750,
pv88080_buck1_limits),
PV88080_BUCK(PV88080, BUCK2, 600000, 6250, 1393750,
pv88080_buck23_limits),
PV88080_BUCK(PV88080, BUCK3, 600000, 6250, 1393750,
pv88080_buck23_limits),
PV88080_HVBUCK(PV88080, HVBUCK, 0, 5000, 1275000),
};
static irqreturn_t pv88080_irq_handler(int irq, void *data)
{
struct pv88080 *chip = data;
int i, reg_val, err, ret = IRQ_NONE;
err = regmap_read(chip->regmap, PV88080_REG_EVENT_A, &reg_val);
if (err < 0)
goto error_i2c;
if (reg_val & PV88080_E_VDD_FLT) {
for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
if (chip->rdev[i] != NULL) {
regulator_notifier_call_chain(chip->rdev[i],
REGULATOR_EVENT_UNDER_VOLTAGE,
NULL);
}
}
err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
PV88080_E_VDD_FLT);
if (err < 0)
goto error_i2c;
ret = IRQ_HANDLED;
}
if (reg_val & PV88080_E_OVER_TEMP) {
for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
if (chip->rdev[i] != NULL) {
regulator_notifier_call_chain(chip->rdev[i],
REGULATOR_EVENT_OVER_TEMP,
NULL);
}
}
err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
PV88080_E_OVER_TEMP);
if (err < 0)
goto error_i2c;
ret = IRQ_HANDLED;
}
return ret;
error_i2c:
dev_err(chip->dev, "I2C error : %d\n", err);
return IRQ_NONE;
}
/*
* I2C driver interface functions
*/
static int pv88080_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
struct pv88080 *chip;
const struct pv88080_compatible_regmap *regmap_config;
const struct of_device_id *match;
struct regulator_config config = { };
int i, error, ret;
unsigned int conf2, conf5;
chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88080), GFP_KERNEL);
if (!chip)
return -ENOMEM;
chip->dev = &i2c->dev;
chip->regmap = devm_regmap_init_i2c(i2c, &pv88080_regmap_config);
if (IS_ERR(chip->regmap)) {
error = PTR_ERR(chip->regmap);
dev_err(chip->dev, "Failed to allocate register map: %d\n",
error);
return error;
}
if (i2c->dev.of_node) {
match = of_match_node(pv88080_dt_ids, i2c->dev.of_node);
if (!match) {
dev_err(chip->dev, "Failed to get of_match_node\n");
return -EINVAL;
}
chip->type = (unsigned long)match->data;
} else {
chip->type = id->driver_data;
}
i2c_set_clientdata(i2c, chip);
if (i2c->irq != 0) {
ret = regmap_write(chip->regmap, PV88080_REG_MASK_A, 0xFF);
if (ret < 0) {
dev_err(chip->dev,
"Failed to mask A reg: %d\n", ret);
return ret;
}
ret = regmap_write(chip->regmap, PV88080_REG_MASK_B, 0xFF);
if (ret < 0) {
dev_err(chip->dev,
"Failed to mask B reg: %d\n", ret);
return ret;
}
ret = regmap_write(chip->regmap, PV88080_REG_MASK_C, 0xFF);
if (ret < 0) {
dev_err(chip->dev,
"Failed to mask C reg: %d\n", ret);
return ret;
}
ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
pv88080_irq_handler,
IRQF_TRIGGER_LOW|IRQF_ONESHOT,
"pv88080", chip);
if (ret != 0) {
dev_err(chip->dev, "Failed to request IRQ: %d\n",
i2c->irq);
return ret;
}
ret = regmap_update_bits(chip->regmap, PV88080_REG_MASK_A,
PV88080_M_VDD_FLT | PV88080_M_OVER_TEMP, 0);
if (ret < 0) {
dev_err(chip->dev,
"Failed to update mask reg: %d\n", ret);
return ret;
}
} else {
dev_warn(chip->dev, "No IRQ configured\n");
}
switch (chip->type) {
case TYPE_PV88080_AA:
chip->regmap_config = &pv88080_aa_regs;
break;
case TYPE_PV88080_BA:
chip->regmap_config = &pv88080_ba_regs;
break;
}
regmap_config = chip->regmap_config;
config.dev = chip->dev;
config.regmap = chip->regmap;
/* Registeration for BUCK1, 2, 3 */
for (i = 0; i < PV88080_MAX_REGULATORS-1; i++) {
if (init_data)
config.init_data = &init_data[i];
pv88080_regulator_info[i].limit_reg
= regmap_config->buck_regmap[i].buck_limit_reg;
pv88080_regulator_info[i].limit_mask
= regmap_config->buck_regmap[i].buck_limit_mask;
pv88080_regulator_info[i].mode_reg
= regmap_config->buck_regmap[i].buck_mode_reg;
pv88080_regulator_info[i].conf2
= regmap_config->buck_regmap[i].buck_vdac_range_reg;
pv88080_regulator_info[i].conf5
= regmap_config->buck_regmap[i].buck_vrange_gain_reg;
pv88080_regulator_info[i].desc.enable_reg
= regmap_config->buck_regmap[i].buck_enable_reg;
pv88080_regulator_info[i].desc.enable_mask
= regmap_config->buck_regmap[i].buck_enable_mask;
pv88080_regulator_info[i].desc.vsel_reg
= regmap_config->buck_regmap[i].buck_vsel_reg;
pv88080_regulator_info[i].desc.vsel_mask
= regmap_config->buck_regmap[i].buck_vsel_mask;
ret = regmap_read(chip->regmap,
pv88080_regulator_info[i].conf2, &conf2);
if (ret < 0)
return ret;
conf2 = ((conf2 >> PV88080_BUCK_VDAC_RANGE_SHIFT) &
PV88080_BUCK_VDAC_RANGE_MASK);
ret = regmap_read(chip->regmap,
pv88080_regulator_info[i].conf5, &conf5);
if (ret < 0)
return ret;
conf5 = ((conf5 >> PV88080_BUCK_VRANGE_GAIN_SHIFT) &
PV88080_BUCK_VRANGE_GAIN_MASK);
pv88080_regulator_info[i].desc.min_uV =
pv88080_buck_vol[conf2].min_uV * (conf5+1);
pv88080_regulator_info[i].desc.uV_step =
pv88080_buck_vol[conf2].uV_step * (conf5+1);
pv88080_regulator_info[i].desc.n_voltages =
((pv88080_buck_vol[conf2].max_uV * (conf5+1))
- (pv88080_regulator_info[i].desc.min_uV))
/(pv88080_regulator_info[i].desc.uV_step) + 1;
config.driver_data = (void *)&pv88080_regulator_info[i];
chip->rdev[i] = devm_regulator_register(chip->dev,
&pv88080_regulator_info[i].desc, &config);
if (IS_ERR(chip->rdev[i])) {
dev_err(chip->dev,
"Failed to register PV88080 regulator\n");
return PTR_ERR(chip->rdev[i]);
}
}
pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_reg
= regmap_config->hvbuck_enable_reg;
pv88080_regulator_info[PV88080_ID_HVBUCK].desc.enable_mask
= regmap_config->hvbuck_enable_mask;
pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_reg
= regmap_config->hvbuck_vsel_reg;
pv88080_regulator_info[PV88080_ID_HVBUCK].desc.vsel_mask
= regmap_config->hvbuck_vsel_mask;
/* Registeration for HVBUCK */
if (init_data)
config.init_data = &init_data[PV88080_ID_HVBUCK];
config.driver_data = (void *)&pv88080_regulator_info[PV88080_ID_HVBUCK];
chip->rdev[PV88080_ID_HVBUCK] = devm_regulator_register(chip->dev,
&pv88080_regulator_info[PV88080_ID_HVBUCK].desc, &config);
if (IS_ERR(chip->rdev[PV88080_ID_HVBUCK])) {
dev_err(chip->dev, "Failed to register PV88080 regulator\n");
return PTR_ERR(chip->rdev[PV88080_ID_HVBUCK]);
}
return 0;
}
static const struct i2c_device_id pv88080_i2c_id[] = {
{ "pv88080", TYPE_PV88080_AA },
{ "pv88080-aa", TYPE_PV88080_AA },
{ "pv88080-ba", TYPE_PV88080_BA },
{},
};
MODULE_DEVICE_TABLE(i2c, pv88080_i2c_id);
static struct i2c_driver pv88080_regulator_driver = {
.driver = {
.name = "pv88080",
.of_match_table = of_match_ptr(pv88080_dt_ids),
},
.probe = pv88080_i2c_probe,
.id_table = pv88080_i2c_id,
};
module_i2c_driver(pv88080_regulator_driver);
MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88080");
MODULE_LICENSE("GPL");
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