Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-01 01:31:44 +00:00
Code Issues Packages Projects Releases Wiki Activity
c172708d38
linux/drivers/regulator/da9052-regulator.c
Mark Brown c172708d38 regulator: core: Use a struct to pass in regulator runtime configuration 
Rather than adding new arguments to regulator_register() every time we
want to add a new bit of dynamic information at runtime change the function
to take these via a struct. By doing this we avoid needing to do further
changes like the recent addition of device tree support which required each
regulator driver to be updated to take an additional parameter.

The regulator_desc which should (mostly) be static data is still passed
separately as most drivers are able to configure this statically at build
time.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-04-09 12:37:09 +01:00

477 lines
13 KiB
C
Raw Blame History

/*
* 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
/* DA9052 REGULATOR IDs */
#define DA9052_ID_BUCK1 0
#define DA9052_ID_BUCK2 1
#define DA9052_ID_BUCK3 2
#define DA9052_ID_BUCK4 3
#define DA9052_ID_LDO1 4
#define DA9052_ID_LDO2 5
#define DA9052_ID_LDO3 6
#define DA9052_ID_LDO4 7
#define DA9052_ID_LDO5 8
#define DA9052_ID_LDO6 9
#define DA9052_ID_LDO7 10
#define DA9052_ID_LDO8 11
#define DA9052_ID_LDO9 12
#define DA9052_ID_LDO10 13
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_voltage(struct regulator_dev *rdev,
unsigned int selector)
{
struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
struct da9052_regulator_info *info = regulator->info;
int id = rdev_get_id(rdev);
int volt_uV;
if ((id == DA9052_ID_BUCK4) && (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_regulator_set_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 id = 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 ((id == DA9052_ID_BUCK4) && (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_voltage(rdev, *selector);
if (ret < 0)
return ret;
ret = da9052_reg_update(regulator->da9052,
DA9052_BUCKCORE_REG + id,
(1 << info->volt_shift) - 1, *selector);
if (ret < 0)
return ret;
/* Some LDOs and DCDCs are DVC controlled which requires enabling of
* the activate bit to implment the changes on the output.
*/
switch (id) {
case DA9052_ID_BUCK1:
case DA9052_ID_BUCK2:
case DA9052_ID_BUCK3:
case DA9052_ID_LDO2:
case DA9052_ID_LDO3:
ret = da9052_reg_update(regulator->da9052, DA9052_SUPPLY_REG,
info->activate_bit, info->activate_bit);
break;
}
return ret;
}
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 struct regulator_ops da9052_dcdc_ops = {
.set_voltage = da9052_regulator_set_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_ldo_ops = {
.set_voltage = da9052_regulator_set_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_LDO(_id, step, min, max, sbits, ebits, abits) \
{\
.reg_desc = {\
.name = #_id,\
.ops = &da9052_ldo_ops,\
.type = REGULATOR_VOLTAGE,\
.id = DA9052_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 = #_id,\
.ops = &da9052_dcdc_ops,\
.type = REGULATOR_VOLTAGE,\
.id = DA9052_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[] = {
DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
DA9052_DCDC(BUCK4, 50, 1800, 3600, 5, 6, 0),
DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
DA9052_LDO(LDO10, 50, 1200, 3600, 6, 6, 0),
};
static struct da9052_regulator_info da9053_regulator_info[] = {
DA9052_DCDC(BUCK1, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBCOREGO),
DA9052_DCDC(BUCK2, 25, 500, 2075, 6, 6, DA9052_SUPPLY_VBPROGO),
DA9052_DCDC(BUCK3, 25, 925, 2500, 6, 6, DA9052_SUPPLY_VBMEMGO),
DA9052_DCDC(BUCK4, 25, 925, 2500, 6, 6, 0),
DA9052_LDO(LDO1, 50, 600, 1800, 5, 6, 0),
DA9052_LDO(LDO2, 25, 600, 1800, 6, 6, DA9052_SUPPLY_VLDO2GO),
DA9052_LDO(LDO3, 25, 1725, 3300, 6, 6, DA9052_SUPPLY_VLDO3GO),
DA9052_LDO(LDO4, 25, 1725, 3300, 6, 6, 0),
DA9052_LDO(LDO5, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(LDO6, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(LDO7, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(LDO8, 50, 1200, 3600, 6, 6, 0),
DA9052_LDO(LDO9, 50, 1250, 3650, 6, 6, 0),
DA9052_LDO(LDO10, 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 regulator_config config = { };
struct da9052_regulator *regulator;
struct da9052 *da9052;
struct da9052_pdata *pdata;
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");
return -EINVAL;
}
config.dev = &pdev->dev;
config.init_data = pdata->regulators[pdev->id];
config.driver_data = regulator;
regulator->rdev = regulator_register(&regulator->info->reg_desc,
&config);
if (IS_ERR(regulator->rdev)) {
dev_err(&pdev->dev, "failed to register regulator %s\n",
regulator->info->reg_desc.name);
return PTR_ERR(regulator->rdev);
}
platform_set_drvdata(pdev, regulator);
return 0;
}
static int __devexit da9052_regulator_remove(struct platform_device *pdev)
{
struct da9052_regulator *regulator = platform_get_drvdata(pdev);
regulator_unregister(regulator->rdev);
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");
Reference in New Issue View Git Blame Copy Permalink