mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 06:55:13 +08:00
368a788769
Signed-off-by: Axel Lin <axel.lin@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
259 lines
6.4 KiB
C
259 lines
6.4 KiB
C
/* 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_map_voltage(struct regulator_dev *rdev,
|
|
int min_uV, int max_uV)
|
|
{
|
|
struct pcf50633 *pcf;
|
|
int regulator_id, millivolts;
|
|
u8 volt_bits;
|
|
|
|
pcf = rdev_get_drvdata(rdev);
|
|
|
|
regulator_id = rdev_get_id(rdev);
|
|
if (regulator_id >= PCF50633_NUM_REGULATORS)
|
|
return -EINVAL;
|
|
|
|
millivolts = min_uV / 1000;
|
|
|
|
switch (regulator_id) {
|
|
case PCF50633_REGULATOR_AUTO:
|
|
volt_bits = auto_voltage_bits(millivolts);
|
|
break;
|
|
case PCF50633_REGULATOR_DOWN1:
|
|
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;
|
|
}
|
|
|
|
return 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:
|
|
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_sel = regulator_set_voltage_sel_regmap,
|
|
.get_voltage_sel = regulator_get_voltage_sel_regmap,
|
|
.list_voltage = pcf50633_regulator_list_voltage,
|
|
.map_voltage = pcf50633_regulator_map_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");
|