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linux-sg2042/drivers/regulator/da9052-regulator.c

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/*
* da9052-regulator.c: Regulator driver for DA9052
*
* Copyright(c) 2011 Dialog Semiconductor Ltd.
*
* Author: David Dajun Chen <dchen@diasemi.com>
*
* 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.
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>
#include <linux/mfd/da9052/pdata.h>
/* Buck step size */
#define DA9052_BUCK_PERI_3uV_STEP 100000
#define DA9052_BUCK_PERI_REG_MAP_UPTO_3uV 24
#define DA9052_CONST_3uV 3000000
#define DA9052_MIN_UA 0
#define DA9052_MAX_UA 3
#define DA9052_CURRENT_RANGE 4
/* Bit masks */
#define DA9052_BUCK_ILIM_MASK_EVEN 0x0c
#define DA9052_BUCK_ILIM_MASK_ODD 0xc0
static const u32 da9052_current_limits[3][4] = {
{700000, 800000, 1000000, 1200000}, /* DA9052-BC BUCKs */
{1600000, 2000000, 2400000, 3000000}, /* DA9053-AA/Bx BUCK-CORE */
{800000, 1000000, 1200000, 1500000}, /* DA9053-AA/Bx BUCK-PRO,
* BUCK-MEM and BUCK-PERI
*/
};
struct da9052_regulator_info {
struct regulator_desc reg_desc;
int step_uV;
int min_uV;
int max_uV;
unsigned char volt_shift;
unsigned char en_bit;
unsigned char activate_bit;
};
struct da9052_regulator {
struct da9052 *da9052;
struct da9052_regulator_info *info;
struct regulator_dev *rdev;
};
static int verify_range(struct da9052_regulator_info *info,
int min_uV, int max_uV)
{
if (min_uV > info->max_uV || max_uV < info->min_uV)
return -EINVAL;
return 0;
}
static int da9052_regulator_enable(struct regulator_dev *rdev)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int offset = rdev_get_id(rdev);
return da9052_reg_update(regulator->da9052,
DA9052_BUCKCORE_REG + offset,
1 << info->en_bit, 1 << info->en_bit);
}
static int da9052_regulator_disable(struct regulator_dev *rdev)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int offset = rdev_get_id(rdev);
return da9052_reg_update(regulator->da9052,
DA9052_BUCKCORE_REG + offset,
1 << info->en_bit, 0);
}
static int da9052_regulator_is_enabled(struct regulator_dev *rdev)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int offset = rdev_get_id(rdev);
int ret;
ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
if (ret < 0)
return ret;
return ret & (1 << info->en_bit);
}
static int da9052_dcdc_get_current_limit(struct regulator_dev *rdev)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
int offset = rdev_get_id(rdev);
int ret, row = 2;
ret = da9052_reg_read(regulator->da9052, DA9052_BUCKA_REG + offset/2);
if (ret < 0)
return ret;
/* Determine the even or odd position of the buck current limit
* register field
*/
if (offset % 2 == 0)
ret = (ret & DA9052_BUCK_ILIM_MASK_EVEN) >> 2;
else
ret = (ret & DA9052_BUCK_ILIM_MASK_ODD) >> 6;
/* Select the appropriate current limit range */
if (regulator->da9052->chip_id == DA9052)
row = 0;
else if (offset == 0)
row = 1;
return da9052_current_limits[row][ret];
}
static int da9052_dcdc_set_current_limit(struct regulator_dev *rdev, int min_uA,
int max_uA)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
int offset = rdev_get_id(rdev);
int reg_val = 0;
int i, row = 2;
/* Select the appropriate current limit range */
if (regulator->da9052->chip_id == DA9052)
row = 0;
else if (offset == 0)
row = 1;
if (min_uA > da9052_current_limits[row][DA9052_MAX_UA] ||
max_uA < da9052_current_limits[row][DA9052_MIN_UA])
return -EINVAL;
for (i = 0; i < DA9052_CURRENT_RANGE; i++) {
if (min_uA <= da9052_current_limits[row][i]) {
reg_val = i;
break;
}
}
/* Determine the even or odd position of the buck current limit
* register field
*/
if (offset % 2 == 0)
return da9052_reg_update(regulator->da9052,
DA9052_BUCKA_REG + offset/2,
DA9052_BUCK_ILIM_MASK_EVEN,
reg_val << 2);
else
return da9052_reg_update(regulator->da9052,
DA9052_BUCKA_REG + offset/2,
DA9052_BUCK_ILIM_MASK_ODD,
reg_val << 6);
}
static int da9052_list_buckperi_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int volt_uV;
if ((regulator->da9052->chip_id == DA9052) &&
(selector >= DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)) {
volt_uV = ((DA9052_BUCK_PERI_REG_MAP_UPTO_3uV * info->step_uV)
+ info->min_uV);
volt_uV += (selector - DA9052_BUCK_PERI_REG_MAP_UPTO_3uV)
* (DA9052_BUCK_PERI_3uV_STEP);
} else
volt_uV = (selector * info->step_uV) + info->min_uV;
if (volt_uV > info->max_uV)
return -EINVAL;
return volt_uV;
}
static int da9052_list_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int volt_uV;
volt_uV = info->min_uV + info->step_uV * selector;
if (volt_uV > info->max_uV)
return -EINVAL;
return volt_uV;
}
static int da9052_regulator_set_voltage_int(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned int *selector)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int offset = rdev_get_id(rdev);
int ret;
ret = verify_range(info, min_uV, max_uV);
if (ret < 0)
return ret;
if (min_uV < info->min_uV)
min_uV = info->min_uV;
*selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
ret = da9052_list_voltage(rdev, *selector);
if (ret < 0)
return ret;
return da9052_reg_update(regulator->da9052,
DA9052_BUCKCORE_REG + offset,
(1 << info->volt_shift) - 1, *selector);
}
static int da9052_set_ldo_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned int *selector)
{
return da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
}
static int da9052_set_ldo5_6_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned int *selector)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int ret;
ret = da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
if (ret < 0)
return ret;
/* Some LDOs are DVC controlled which requires enabling of
* the LDO activate bit to implment the changes on the
* LDO output.
*/
return da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
info->activate_bit, info->activate_bit);
}
static int da9052_set_dcdc_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned int *selector)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int ret;
ret = da9052_regulator_set_voltage_int(rdev, min_uV, max_uV, selector);
if (ret < 0)
return ret;
/* Some DCDCs are DVC controlled which requires enabling of
* the DCDC activate bit to implment the changes on the
* DCDC output.
*/
return da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
info->activate_bit, info->activate_bit);
}
static int da9052_get_regulator_voltage_sel(struct regulator_dev *rdev)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int offset = rdev_get_id(rdev);
int ret;
ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
if (ret < 0)
return ret;
ret &= ((1 << info->volt_shift) - 1);
return ret;
}
static int da9052_set_buckperi_voltage(struct regulator_dev *rdev, int min_uV,
int max_uV, unsigned int *selector)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int offset = rdev_get_id(rdev);
int ret;
ret = verify_range(info, min_uV, max_uV);
if (ret < 0)
return ret;
if (min_uV < info->min_uV)
min_uV = info->min_uV;
if ((regulator->da9052->chip_id == DA9052) &&
(min_uV >= DA9052_CONST_3uV))
*selector = DA9052_BUCK_PERI_REG_MAP_UPTO_3uV +
DIV_ROUND_UP(min_uV - DA9052_CONST_3uV,
DA9052_BUCK_PERI_3uV_STEP);
else
*selector = DIV_ROUND_UP(min_uV - info->min_uV, info->step_uV);
ret = da9052_list_buckperi_voltage(rdev, *selector);
if (ret < 0)
return ret;
return da9052_reg_update(regulator->da9052,
DA9052_BUCKCORE_REG + offset,
(1 << info->volt_shift) - 1, *selector);
}
static int da9052_get_buckperi_voltage_sel(struct regulator_dev *rdev)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int offset = rdev_get_id(rdev);
int ret;
ret = da9052_reg_read(regulator->da9052, DA9052_BUCKCORE_REG + offset);
if (ret < 0)
return ret;
ret &= ((1 << info->volt_shift) - 1);
return ret;
}
static struct regulator_ops da9052_buckperi_ops = {
.list_voltage = da9052_list_buckperi_voltage,
.get_voltage_sel = da9052_get_buckperi_voltage_sel,
.set_voltage = da9052_set_buckperi_voltage,
.get_current_limit = da9052_dcdc_get_current_limit,
.set_current_limit = da9052_dcdc_set_current_limit,
.is_enabled = da9052_regulator_is_enabled,
.enable = da9052_regulator_enable,
.disable = da9052_regulator_disable,
};
static struct regulator_ops da9052_dcdc_ops = {
.set_voltage = da9052_set_dcdc_voltage,
.get_current_limit = da9052_dcdc_get_current_limit,
.set_current_limit = da9052_dcdc_set_current_limit,
.list_voltage = da9052_list_voltage,
.get_voltage_sel = da9052_get_regulator_voltage_sel,
.is_enabled = da9052_regulator_is_enabled,
.enable = da9052_regulator_enable,
.disable = da9052_regulator_disable,
};
static struct regulator_ops da9052_ldo5_6_ops = {
.set_voltage = da9052_set_ldo5_6_voltage,
.list_voltage = da9052_list_voltage,
.get_voltage_sel = da9052_get_regulator_voltage_sel,
.is_enabled = da9052_regulator_is_enabled,
.enable = da9052_regulator_enable,
.disable = da9052_regulator_disable,
};
static struct regulator_ops da9052_ldo_ops = {
.set_voltage = da9052_set_ldo_voltage,
.list_voltage = da9052_list_voltage,
.get_voltage_sel = da9052_get_regulator_voltage_sel,
.is_enabled = da9052_regulator_is_enabled,
.enable = da9052_regulator_enable,
.disable = da9052_regulator_disable,
};
#define DA9052_LDO5_6(_id, step, min, max, sbits, ebits, abits) \
{\
.reg_desc = {\
.name = "LDO" #_id,\
.ops = &da9052_ldo5_6_ops,\
.type = REGULATOR_VOLTAGE,\
.id = _id,\
.n_voltages = (max - min) / step + 1, \
.owner = THIS_MODULE,\
},\
.min_uV = (min) * 1000,\
.max_uV = (max) * 1000,\
.step_uV = (step) * 1000,\
.volt_shift = (sbits),\
.en_bit = (ebits),\
.activate_bit = (abits),\
}
#define DA9052_LDO(_id, step, min, max, sbits, ebits, abits) \
{\
.reg_desc = {\
.name = "LDO" #_id,\
.ops = &da9052_ldo_ops,\
.type = REGULATOR_VOLTAGE,\
.id = _id,\
.n_voltages = (max - min) / step + 1, \
.owner = THIS_MODULE,\
},\
.min_uV = (min) * 1000,\
.max_uV = (max) * 1000,\
.step_uV = (step) * 1000,\
.volt_shift = (sbits),\
.en_bit = (ebits),\
.activate_bit = (abits),\
}
#define DA9052_DCDC(_id, step, min, max, sbits, ebits, abits) \
{\
.reg_desc = {\
.name = "BUCK" #_id,\
.ops = &da9052_dcdc_ops,\
.type = REGULATOR_VOLTAGE,\
.id = _id,\
.n_voltages = (max - min) / step + 1, \
.owner = THIS_MODULE,\
},\
.min_uV = (min) * 1000,\
.max_uV = (max) * 1000,\
.step_uV = (step) * 1000,\
.volt_shift = (sbits),\
.en_bit = (ebits),\
.activate_bit = (abits),\
}
#define DA9052_BUCKPERI(_id, step, min, max, sbits, ebits, abits) \
{\
.reg_desc = {\
.name = "BUCK" #_id,\
.ops = &da9052_buckperi_ops,\
.type = REGULATOR_VOLTAGE,\
.id = _id,\
.n_voltages = (max - min) / step + 1, \
.owner = THIS_MODULE,\
},\
.min_uV = (min) * 1000,\
.max_uV = (max) * 1000,\
.step_uV = (step) * 1000,\
.volt_shift = (sbits),\
.en_bit = (ebits),\
.activate_bit = (abits),\
}
static struct da9052_regulator_info da9052_regulator_info[] = {
/* Buck1 - 4 */
DA9052_DCDC(0, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
DA9052_DCDC(1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
DA9052_DCDC(2, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
DA9052_BUCKPERI(3, 50, 1800, 3600, 5, 6, 0),
/* LD01 - LDO10 */
DA9052_LDO(4, 50, 600, 1800, 5, 6, 0),
DA9052_LDO5_6(5, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
DA9052_LDO5_6(6, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
DA9052_LDO(7, 25, 1725, 3300, 6, 6, 0),
DA9052_LDO(8, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(9, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(10, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(11, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(12, 50, 1250, 3650, 6, 6, 0),
DA9052_LDO(13, 50, 1200, 3600, 6, 6, 0),
};
static struct da9052_regulator_info da9053_regulator_info[] = {
/* Buck1 - 4 */
DA9052_DCDC(0, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
DA9052_DCDC(1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
DA9052_DCDC(2, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
DA9052_BUCKPERI(3, 25, 925, 2500, 6, 6, 0),
/* LD01 - LDO10 */
DA9052_LDO(4, 50, 600, 1800, 5, 6, 0),
DA9052_LDO5_6(5, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
DA9052_LDO5_6(6, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
DA9052_LDO(7, 25, 1725, 3300, 6, 6, 0),
DA9052_LDO(8, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(9, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(10, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(11, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(12, 50, 1250, 3650, 6, 6, 0),
DA9052_LDO(13, 50, 1200, 3600, 6, 6, 0),
};
static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
int id)
{
struct da9052_regulator_info *info;
int i;
switch (chip_id) {
case DA9052:
for (i = 0; i < ARRAY_SIZE(da9052_regulator_info); i++) {
info = &da9052_regulator_info[i];
if (info->reg_desc.id == id)
return info;
}
break;
case DA9053_AA:
case DA9053_BA:
case DA9053_BB:
for (i = 0; i < ARRAY_SIZE(da9053_regulator_info); i++) {
info = &da9053_regulator_info[i];
if (info->reg_desc.id == id)
return info;
}
break;
}
return NULL;
}
static int __devinit da9052_regulator_probe(struct platform_device *pdev)
{
struct da9052_regulator *regulator;
struct da9052 *da9052;
struct da9052_pdata *pdata;
int ret;
regulator = devm_kzalloc(&pdev->dev, sizeof(struct da9052_regulator),
GFP_KERNEL);
if (!regulator)
return -ENOMEM;
da9052 = dev_get_drvdata(pdev->dev.parent);
pdata = da9052->dev->platform_data;
regulator->da9052 = da9052;
regulator->info = find_regulator_info(regulator->da9052->chip_id,
pdev->id);
if (regulator->info == NULL) {
dev_err(&pdev->dev, "invalid regulator ID specified\n");
ret = -EINVAL;
goto err;
}
regulator->rdev = regulator_register(&regulator->info->reg_desc,
&pdev->dev,
pdata->regulators[pdev->id],
regulator, NULL);
if (IS_ERR(regulator->rdev)) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
regulator->info->reg_desc.name);
ret = PTR_ERR(regulator->rdev);
goto err;
}
platform_set_drvdata(pdev, regulator);
return 0;
err:
devm_kfree(&pdev->dev, regulator);
return ret;
}
static int __devexit da9052_regulator_remove(struct platform_device *pdev)
{
struct da9052_regulator *regulator = platform_get_drvdata(pdev);
regulator_unregister(regulator->rdev);
devm_kfree(&pdev->dev, regulator);
return 0;
}
static struct platform_driver da9052_regulator_driver = {
.probe = da9052_regulator_probe,
.remove = __devexit_p(da9052_regulator_remove),
.driver = {
.name = "da9052-regulator",
.owner = THIS_MODULE,
},
};
static int __init da9052_regulator_init(void)
{
return platform_driver_register(&da9052_regulator_driver);
}
subsys_initcall(da9052_regulator_init);
static void __exit da9052_regulator_exit(void)
{
platform_driver_unregister(&da9052_regulator_driver);
}
module_exit(da9052_regulator_exit);
MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("Power Regulator driver for Dialog DA9052 PMIC");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9052-regulator");
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