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/*
* Copyright(c) 2009 Dialog 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.
*
* da9052-regulator.c: Regulator driver for DA9052
*/
#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/pm.h>
static struct regulator_ops da9052_ldo_buck_ops;
struct regulator {
struct device *dev;
struct list_head list;
int uA_load;
int min_uV;
int max_uV;
int enabled; /* client has called enabled */
char *supply_name;
struct device_attribute dev_attr;
struct regulator_dev *rdev;
};
#define DA9052_LDO(_id, max, min, step_v, reg, mbits, cbits) \
{\
.reg_desc = {\
.name = #_id,\
.ops = &da9052_ldo_buck_ops,\
.type = REGULATOR_VOLTAGE,\
.id = _id,\
.owner = THIS_MODULE,\
},\
.reg_const = {\
.max_uV = (max) * 1000,\
.min_uV = (min) * 1000,\
.valid_ops_mask = REGULATOR_CHANGE_VOLTAGE\
| REGULATOR_CHANGE_STATUS | REGULATOR_CHANGE_MODE,\
.valid_modes_mask = REGULATOR_MODE_NORMAL,\
},\
.step_uV = (step_v) * 1000,\
.reg_add = (reg),\
.mask_bits = (mbits),\
.en_bit_mask = (cbits),\
}
struct regulator_info {
struct regulator_desc reg_desc;
struct regulation_constraints reg_const;
int step_uV;
unsigned char reg_add;
unsigned char mask_bits;
unsigned char en_bit_mask;
};
struct da9052_regulator_priv {
struct da9052 *da9052;
struct regulator_dev *regulators[];
};
struct regulator_info da9052_regulators[] = {
/* LD01 - LDO10*/
DA9052_LDO(DA9052_LDO1, DA9052_LDO1_VOLT_UPPER, DA9052_LDO1_VOLT_LOWER,
DA9052_LDO1_VOLT_STEP, DA9052_LDO1_REG,
DA9052_LDO1_VLDO1, DA9052_LDO1_LDO1EN),
DA9052_LDO(DA9052_LDO2,
DA9052_LDO2_VOLT_UPPER, DA9052_LDO2_VOLT_LOWER,
DA9052_LDO2_VOLT_STEP, DA9052_LDO2_REG,
DA9052_LDO2_VLDO2,
DA9052_LDO2_LDO2EN),
DA9052_LDO(DA9052_LDO3, DA9052_LDO34_VOLT_UPPER,
DA9052_LDO34_VOLT_LOWER,
DA9052_LDO34_VOLT_STEP, DA9052_LDO3_REG,
DA9052_LDO3_VLDO3, DA9052_LDO3_LDO3EN),
DA9052_LDO(DA9052_LDO4, DA9052_LDO34_VOLT_UPPER,
DA9052_LDO34_VOLT_LOWER,
DA9052_LDO34_VOLT_STEP, DA9052_LDO4_REG,
DA9052_LDO4_VLDO4, DA9052_LDO4_LDO4EN),
DA9052_LDO(DA9052_LDO5, DA9052_LDO567810_VOLT_UPPER,
DA9052_LDO567810_VOLT_LOWER,
DA9052_LDO567810_VOLT_STEP, DA9052_LDO5_REG,
DA9052_LDO5_VLDO5, DA9052_LDO5_LDO5EN),
DA9052_LDO(DA9052_LDO6, DA9052_LDO567810_VOLT_UPPER,
DA9052_LDO567810_VOLT_LOWER,
DA9052_LDO567810_VOLT_STEP, DA9052_LDO6_REG,
DA9052_LDO6_VLDO6, DA9052_LDO6_LDO6EN),
DA9052_LDO(DA9052_LDO7, DA9052_LDO567810_VOLT_UPPER,
DA9052_LDO567810_VOLT_LOWER,
DA9052_LDO567810_VOLT_STEP, DA9052_LDO7_REG,
DA9052_LDO7_VLDO7, DA9052_LDO7_LDO7EN),
DA9052_LDO(DA9052_LDO8, DA9052_LDO567810_VOLT_UPPER,
DA9052_LDO567810_VOLT_LOWER,
DA9052_LDO567810_VOLT_STEP, DA9052_LDO8_REG,
DA9052_LDO8_VLDO8, DA9052_LDO8_LDO8EN),
DA9052_LDO(DA9052_LDO9, DA9052_LDO9_VOLT_UPPER,
DA9052_LDO9_VOLT_LOWER,
DA9052_LDO9_VOLT_STEP,
DA9052_LDO9_REG, DA9052_LDO9_VLDO9,
DA9052_LDO9_LDO9EN),
DA9052_LDO(DA9052_LDO10, DA9052_LDO567810_VOLT_UPPER,
DA9052_LDO567810_VOLT_LOWER,
DA9052_LDO567810_VOLT_STEP, DA9052_LDO10_REG,
DA9052_LDO10_VLDO10, DA9052_LDO10_LDO10EN),
/* BUCKS */
DA9052_LDO(DA9052_BUCK_CORE, DA9052_BUCK_CORE_PRO_VOLT_UPPER,
DA9052_BUCK_CORE_PRO_VOLT_LOWER,
DA9052_BUCK_CORE_PRO_STEP, DA9052_BUCKCORE_REG,
DA9052_BUCKCORE_VBCORE, DA9052_BUCKCORE_BCOREEN),
DA9052_LDO(DA9052_BUCK_PRO, DA9052_BUCK_CORE_PRO_VOLT_UPPER,
DA9052_BUCK_CORE_PRO_VOLT_LOWER,
DA9052_BUCK_CORE_PRO_STEP, DA9052_BUCKPRO_REG,
DA9052_BUCKPRO_VBPRO, DA9052_BUCKPRO_BPROEN),
DA9052_LDO(DA9052_BUCK_MEM, DA9052_BUCK_MEM_VOLT_UPPER,
DA9052_BUCK_MEM_VOLT_LOWER,
DA9052_BUCK_MEM_STEP, DA9052_BUCKMEM_REG,
DA9052_BUCKMEM_VBMEM, DA9052_BUCKMEM_BMEMEN),
#if defined(CONFIG_PMIC_DA9052)
DA9052_LDO(DA9052_BUCK_PERI, DA9052_BUCK_PERI_VOLT_UPPER,
DA9052_BUCK_PERI_VOLT_LOWER,
DA9052_BUCK_PERI_STEP_BELOW_3000, DA9052_BUCKPERI_REG,
DA9052_BUCKPERI_VBPERI, DA9052_BUCKPERI_BPERIEN),
#elif defined(CONFIG_PMIC_DA9053AA) || defined(CONFIG_PMIC_DA9053Bx)
DA9052_LDO(DA9052_BUCK_PERI, DA9052_BUCK_PERI_VOLT_UPPER,
DA9052_BUCK_PERI_VOLT_LOWER,
DA9052_BUCK_PERI_STEP, DA9052_BUCKPERI_REG,
DA9052_BUCKPERI_VBPERI, DA9052_BUCKPERI_BPERIEN),
#endif
};
int da9052_ldo_buck_enable(struct regulator_dev *rdev)
{
struct da9052_regulator_priv *priv = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
int ret = 0;
struct da9052_ssc_msg ssc_msg;
ssc_msg.addr = da9052_regulators[id].reg_add;
ssc_msg.data = 0;
da9052_lock(priv->da9052);
ret = priv->da9052->read(priv->da9052, &ssc_msg);
if (ret) {
da9052_unlock(priv->da9052);
return -EIO;
}
ssc_msg.data = (ssc_msg.data | da9052_regulators[id].en_bit_mask);
ret = priv->da9052->write(priv->da9052, &ssc_msg);
if (ret) {
da9052_unlock(priv->da9052);
return -EIO;
}
da9052_unlock(priv->da9052);
return 0;
}
EXPORT_SYMBOL_GPL(da9052_ldo_buck_enable);
/* Code added to support additional attribure in sysfs - changestate */
int da9052_ldo_buck_disable(struct regulator_dev *rdev)
{
struct da9052_regulator_priv *priv = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
int ret;
struct da9052_ssc_msg ssc_msg;
ssc_msg.addr = da9052_regulators[id].reg_add;
ssc_msg.data = 0;
da9052_lock(priv->da9052);
ret = priv->da9052->read(priv->da9052, &ssc_msg);
if (ret) {
da9052_unlock(priv->da9052);
return -EIO;
}
ssc_msg.data = (ssc_msg.data & ~(da9052_regulators[id].en_bit_mask));
ret = priv->da9052->write(priv->da9052, &ssc_msg);
if (ret) {
da9052_unlock(priv->da9052);
return -EIO;
}
da9052_unlock(priv->da9052);
return 0;
}
EXPORT_SYMBOL_GPL(da9052_ldo_buck_disable);
/* Code added to support additional attribure in sysfs - changestate */
static int da9052_ldo_buck_is_enabled(struct regulator_dev *rdev)
{
struct da9052_regulator_priv *priv = rdev_get_drvdata(rdev);
int id = rdev_get_id(rdev);
int ret;
struct da9052_ssc_msg ssc_msg;
ssc_msg.addr = da9052_regulators[id].reg_add;
ssc_msg.data = 0;
da9052_lock(priv->da9052);
ret = priv->da9052->read(priv->da9052, &ssc_msg);
if (ret) {
da9052_unlock(priv->da9052);
return -EIO;
}
da9052_unlock(priv->da9052);
return (ssc_msg.data & da9052_regulators[id].en_bit_mask) != 0;
}
int da9052_ldo_buck_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned *selector)
{
struct da9052_regulator_priv *priv = rdev_get_drvdata(rdev);
struct da9052_ssc_msg ssc_msg;
int id = rdev_get_id(rdev);
int ret;
int ldo_volt = 0;
(void)selector;
/* Below if condition is there for added setvoltage attribute
in sysfs */
if (0 == max_uV)
max_uV = da9052_regulators[id].reg_const.max_uV;
/* Compare voltage range */
if (min_uV > max_uV)
return -EINVAL;
/* Check Minimum/ Maximum voltage range */
if (min_uV < da9052_regulators[id].reg_const.min_uV ||
min_uV > da9052_regulators[id].reg_const.max_uV)
return -EINVAL;
if (max_uV < da9052_regulators[id].reg_const.min_uV ||
max_uV > da9052_regulators[id].reg_const.max_uV)
return -EINVAL;
#if defined(CONFIG_PMIC_DA9052)
/* Get the ldo register value */
/* Varying step size for BUCK PERI */
if ((da9052_regulators[id].reg_desc.id == DA9052_BUCK_PERI) &&
(min_uV >= DA9052_BUCK_PERI_VALUES_3000)) {
ldo_volt = (DA9052_BUCK_PERI_VALUES_3000 -
da9052_regulators[id].reg_const.min_uV)/
(da9052_regulators[id].step_uV);
ldo_volt += (min_uV - DA9052_BUCK_PERI_VALUES_3000)/
(DA9052_BUCK_PERI_STEP_ABOVE_3000);
} else{
ldo_volt = (min_uV - da9052_regulators[id].reg_const.min_uV)/
(da9052_regulators[id].step_uV);
/* Check for maximum value */
if ((ldo_volt * da9052_regulators[id].step_uV) +
da9052_regulators[id].reg_const.min_uV > max_uV)
return -EINVAL;
}
#elif defined(CONFIG_PMIC_DA9053AA) || defined(CONFIG_PMIC_DA9053Bx)
ldo_volt = (min_uV - da9052_regulators[id].reg_const.min_uV)/
(da9052_regulators[id].step_uV);
/* Check for maximum value */
if ((ldo_volt * da9052_regulators[id].step_uV) +
da9052_regulators[id].reg_const.min_uV > max_uV)
return -EINVAL;
#endif
/* Configure LDO Voltage, CONF bits */
ssc_msg.addr = da9052_regulators[id].reg_add;
ssc_msg.data = 0;
/* Read register */
da9052_lock(priv->da9052);
ret = priv->da9052->read(priv->da9052, &ssc_msg);
if (ret) {
da9052_unlock(priv->da9052);
return -EIO;
}
ssc_msg.data = (ssc_msg.data & ~(da9052_regulators[id].mask_bits));
ssc_msg.data |= ldo_volt;
ret = priv->da9052->write(priv->da9052, &ssc_msg);
if (ret) {
da9052_unlock(priv->da9052);
return -EIO;
}
/* Set the GO LDO/BUCk bits so that the voltage changes */
ssc_msg.addr = DA9052_SUPPLY_REG;
ssc_msg.data = 0;
ret = priv->da9052->read(priv->da9052, &ssc_msg);
if (ret) {
da9052_unlock(priv->da9052);
return -EIO;
}
switch (id) {
case DA9052_LDO2:
ssc_msg.data = (ssc_msg.data | DA9052_SUPPLY_VLDO2GO);
break;
case DA9052_LDO3:
ssc_msg.data = (ssc_msg.data | DA9052_SUPPLY_VLDO3GO);
break;
case DA9052_BUCK_CORE:
ssc_msg.data = (ssc_msg.data | DA9052_SUPPLY_VBCOREGO);
break;
case DA9052_BUCK_PRO:
ssc_msg.data = (ssc_msg.data | DA9052_SUPPLY_VBPROGO);
break;
case DA9052_BUCK_MEM:
ssc_msg.data = (ssc_msg.data | DA9052_SUPPLY_VBMEMGO);
break;
default:
da9052_unlock(priv->da9052);
return -EINVAL;
}
ret = priv->da9052->write(priv->da9052, &ssc_msg);
if (ret) {
da9052_unlock(priv->da9052);
return -EIO;
}
da9052_unlock(priv->da9052);
return 0;
}
EXPORT_SYMBOL_GPL(da9052_ldo_buck_set_voltage);
/* Code added to support additional attributes in sysfs - setvoltage */
int da9052_ldo_buck_get_voltage(struct regulator_dev *rdev)
{
struct da9052_regulator_priv *priv = rdev_get_drvdata(rdev);
struct da9052_ssc_msg ssc_msg;
int id = rdev_get_id(rdev);
int ldo_volt = 0;
int ldo_volt_uV = 0;
int ret;
ssc_msg.addr = da9052_regulators[id].reg_add;
ssc_msg.data = 0;
/* Read register */
da9052_lock(priv->da9052);
ret = priv->da9052->read(priv->da9052, &ssc_msg);
if (ret) {
da9052_unlock(priv->da9052);
return -EIO;
}
da9052_unlock(priv->da9052);
ldo_volt = ssc_msg.data & da9052_regulators[id].mask_bits;
#if defined(CONFIG_PMIC_DA9052)
if (da9052_regulators[id].reg_desc.id == DA9052_BUCK_PERI) {
if (ldo_volt >= DA9052_BUCK_PERI_VALUES_UPTO_3000) {
ldo_volt_uV = ((DA9052_BUCK_PERI_VALUES_UPTO_3000 *
da9052_regulators[id].step_uV)
+ da9052_regulators[id].reg_const.min_uV);
ldo_volt_uV = (ldo_volt_uV +
(ldo_volt - DA9052_BUCK_PERI_VALUES_UPTO_3000)
* (DA9052_BUCK_PERI_STEP_ABOVE_3000));
} else {
ldo_volt_uV =
(ldo_volt * da9052_regulators[id].step_uV)
+ da9052_regulators[id].reg_const.min_uV;
}
} else {
ldo_volt_uV = (ldo_volt * da9052_regulators[id].step_uV) +
da9052_regulators[id].reg_const.min_uV;
}
#elif defined(CONFIG_PMIC_DA9053AA) || defined(CONFIG_PMIC_DA9053Bx)
ldo_volt_uV = (ldo_volt * da9052_regulators[id].step_uV) +
da9052_regulators[id].reg_const.min_uV;
#endif
return ldo_volt_uV;
}
EXPORT_SYMBOL_GPL(da9052_ldo_buck_get_voltage);
/* Code added to support additional attributes in sysfs - setvoltage */
static struct regulator_ops da9052_ldo_buck_ops = {
.is_enabled = da9052_ldo_buck_is_enabled,
.enable = da9052_ldo_buck_enable,
.disable = da9052_ldo_buck_disable,
.get_voltage = da9052_ldo_buck_get_voltage,
.set_voltage = da9052_ldo_buck_set_voltage,
};
static int __devinit da9052_regulator_probe(struct platform_device *pdev)
{
struct da9052_regulator_priv *priv;
struct da9052_regulator_platform_data *pdata =
(pdev->dev.platform_data);
struct da9052 *da9052 = dev_get_drvdata(pdev->dev.parent);
struct regulator_init_data *init_data;
int i, ret = 0;
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (priv == NULL)
return -ENOMEM;
priv->da9052 = da9052;
for (i = 0; i < 14; i++) {
init_data = &pdata->regulators[i];
init_data->driver_data = da9052;
pdev->dev.platform_data = init_data;
priv->regulators[i] = regulator_register(
&da9052_regulators[i].reg_desc,
&pdev->dev, init_data,
priv);
if (IS_ERR(priv->regulators[i])) {
ret = PTR_ERR(priv->regulators[i]);
goto err;
}
}
platform_set_drvdata(pdev, priv);
return 0;
err:
while (--i >= 0)
regulator_unregister(priv->regulators[i]);
kfree(priv);
return ret;
}
static int __devexit da9052_regulator_remove(struct platform_device *pdev)
{
struct da9052_regulator_priv *priv = platform_get_drvdata(pdev);
struct da9052_platform_data *pdata = pdev->dev.platform_data;
int i;
for (i = 0; i < pdata->num_regulators; i++)
regulator_unregister(priv->regulators[i]);
return 0;
}
static struct platform_driver da9052_regulator_driver = {
.probe = da9052_regulator_probe,
.remove = __devexit_p(da9052_regulator_remove),
.driver = {
.name = DRIVER_NAME,
.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 v2");
MODULE_ALIAS("platform:" DRIVER_NAME);
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