/* NXP PCF50633 PMIC Driver
*
* (C) 2006-2008 by Openmoko, Inc.
* Author: Balaji Rao <balajirrao@openmoko.org>
* All rights reserved.
*
* Broken down from monstrous PCF50633 driver mainly by
* Harald Welte and Andy Green and Werner Almesberger
*
* 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/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/mfd/pcf50633/core.h>
#include <linux/mfd/pcf50633/pmic.h>
#define PCF50633_REGULATOR(_name, _id, _n) \
{ \
.name = _name, \
.id = PCF50633_REGULATOR_##_id, \
.ops = &pcf50633_regulator_ops, \
.n_voltages = _n, \
.type = REGULATOR_VOLTAGE, \
.owner = THIS_MODULE, \
.vsel_reg = PCF50633_REG_##_id##OUT, \
.vsel_mask = 0xff, \
.enable_reg = PCF50633_REG_##_id##OUT + 1, \
.enable_mask = PCF50633_REGULATOR_ON, \
}
/* Bits from voltage value */
static u8 auto_voltage_bits(unsigned int millivolts)
{
if (millivolts < 1800)
return 0x2f;
if (millivolts > 3800)
return 0xff;
millivolts -= 625;
return millivolts / 25;
}
static u8 down_voltage_bits(unsigned int millivolts)
{
if (millivolts < 625)
return 0;
else if (millivolts > 3000)
return 0xff;
millivolts -= 625;
return millivolts / 25;
}
static u8 ldo_voltage_bits(unsigned int millivolts)
{
if (millivolts < 900)
return 0;
else if (millivolts > 3600)
return 0x1f;
millivolts -= 900;
return millivolts / 100;
}
/* Obtain voltage value from bits */
static unsigned int auto_voltage_value(u8 bits)
{
/* AUTOOUT: 00000000 to 00101110 are reserved.
* Return 0 for bits in reserved range, which means this selector code
* can't be used on this system */
if (bits < 0x2f)
return 0;
return 625 + (bits * 25);
}
static unsigned int down_voltage_value(u8 bits)
{
return 625 + (bits * 25);
}
static unsigned int ldo_voltage_value(u8 bits)
{
bits &= 0x1f;
return 900 + (bits * 100);
}
static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned *selector)
{
struct pcf50633 *pcf;
int regulator_id, millivolts;
u8 volt_bits, regnr;
pcf = rdev_get_drvdata(rdev);
regulator_id = rdev_get_id(rdev);
if (regulator_id >= PCF50633_NUM_REGULATORS)
return -EINVAL;
millivolts = min_uV / 1000;
regnr = rdev->desc->vsel_reg;
switch (regulator_id) {
case PCF50633_REGULATOR_AUTO:
volt_bits = auto_voltage_bits(millivolts);
break;
case PCF50633_REGULATOR_DOWN1:
volt_bits = down_voltage_bits(millivolts);
break;
case PCF50633_REGULATOR_DOWN2:
volt_bits = down_voltage_bits(millivolts);
break;
case PCF50633_REGULATOR_LDO1:
case PCF50633_REGULATOR_LDO2:
case PCF50633_REGULATOR_LDO3:
case PCF50633_REGULATOR_LDO4:
case PCF50633_REGULATOR_LDO5:
case PCF50633_REGULATOR_LDO6:
case PCF50633_REGULATOR_HCLDO:
case PCF50633_REGULATOR_MEMLDO:
volt_bits = ldo_voltage_bits(millivolts);
break;
default:
return -EINVAL;
}
*selector = volt_bits;
return pcf50633_reg_write(pcf, regnr, volt_bits);
}
static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
unsigned int index)
{
int regulator_id = rdev_get_id(rdev);
int millivolts;
switch (regulator_id) {
case PCF50633_REGULATOR_AUTO:
millivolts = auto_voltage_value(index);
break;
case PCF50633_REGULATOR_DOWN1:
millivolts = down_voltage_value(index);
break;
case PCF50633_REGULATOR_DOWN2:
millivolts = down_voltage_value(index);
break;
case PCF50633_REGULATOR_LDO1:
case PCF50633_REGULATOR_LDO2:
case PCF50633_REGULATOR_LDO3:
case PCF50633_REGULATOR_LDO4:
case PCF50633_REGULATOR_LDO5:
case PCF50633_REGULATOR_LDO6:
case PCF50633_REGULATOR_HCLDO:
case PCF50633_REGULATOR_MEMLDO:
millivolts = ldo_voltage_value(index);
break;
default:
return -EINVAL;
}
return millivolts * 1000;
}
static struct regulator_ops pcf50633_regulator_ops = {
.set_voltage = pcf50633_regulator_set_voltage,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.list_voltage = pcf50633_regulator_list_voltage,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static const struct regulator_desc regulators[] = {
[PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", AUTO, 128),
[PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", DOWN1, 96),
[PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", DOWN2, 96),
[PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", LDO1, 28),
[PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", LDO2, 28),
[PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", LDO3, 28),
[PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", LDO4, 28),
[PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", LDO5, 28),
[PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", LDO6, 28),
[PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", HCLDO, 28),
[PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", MEMLDO, 28),
};
static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
{
struct regulator_dev *rdev;
struct pcf50633 *pcf;
struct regulator_config config = { };
/* Already set by core driver */
pcf = dev_to_pcf50633(pdev->dev.parent);
config.dev = &pdev->dev;
config.init_data = pdev->dev.platform_data;
config.driver_data = pcf;
config.regmap = pcf->regmap;
rdev = regulator_register(®ulators[pdev->id], &config);
if (IS_ERR(rdev))
return PTR_ERR(rdev);
platform_set_drvdata(pdev, rdev);
if (pcf->pdata->regulator_registered)
pcf->pdata->regulator_registered(pcf, pdev->id);
return 0;
}
static int __devexit pcf50633_regulator_remove(struct platform_device *pdev)
{
struct regulator_dev *rdev = platform_get_drvdata(pdev);
platform_set_drvdata(pdev, NULL);
regulator_unregister(rdev);
return 0;
}
static struct platform_driver pcf50633_regulator_driver = {
.driver = {
.name = "pcf50633-regltr",
},
.probe = pcf50633_regulator_probe,
.remove = __devexit_p(pcf50633_regulator_remove),
};
static int __init pcf50633_regulator_init(void)
{
return platform_driver_register(&pcf50633_regulator_driver);
}
subsys_initcall(pcf50633_regulator_init);
static void __exit pcf50633_regulator_exit(void)
{
platform_driver_unregister(&pcf50633_regulator_driver);
}
module_exit(pcf50633_regulator_exit);
MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_DESCRIPTION("PCF50633 regulator driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:pcf50633-regulator");
