mirror of
https://github.com/torvalds/linux.git
synced 2024-11-08 21:21:47 +00:00
5a1b22beef
Regulators need to be available early in init in order to allow them to be available for consumers when requested. This is generally done by registering them at subsys_initcall() time but not all regulator drivers have done that. Convert these drivers to do so in order to mimimise future support. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Mike Rapoport <mike@compulab.co.il> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
331 lines
8.3 KiB
C
331 lines
8.3 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) \
|
|
{ \
|
|
.name = _name, \
|
|
.id = _id, \
|
|
.ops = &pcf50633_regulator_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.owner = THIS_MODULE, \
|
|
}
|
|
|
|
static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
|
|
[PCF50633_REGULATOR_AUTO] = PCF50633_REG_AUTOOUT,
|
|
[PCF50633_REGULATOR_DOWN1] = PCF50633_REG_DOWN1OUT,
|
|
[PCF50633_REGULATOR_DOWN2] = PCF50633_REG_DOWN2OUT,
|
|
[PCF50633_REGULATOR_MEMLDO] = PCF50633_REG_MEMLDOOUT,
|
|
[PCF50633_REGULATOR_LDO1] = PCF50633_REG_LDO1OUT,
|
|
[PCF50633_REGULATOR_LDO2] = PCF50633_REG_LDO2OUT,
|
|
[PCF50633_REGULATOR_LDO3] = PCF50633_REG_LDO3OUT,
|
|
[PCF50633_REGULATOR_LDO4] = PCF50633_REG_LDO4OUT,
|
|
[PCF50633_REGULATOR_LDO5] = PCF50633_REG_LDO5OUT,
|
|
[PCF50633_REGULATOR_LDO6] = PCF50633_REG_LDO6OUT,
|
|
[PCF50633_REGULATOR_HCLDO] = PCF50633_REG_HCLDOOUT,
|
|
};
|
|
|
|
/* Bits from voltage value */
|
|
static u8 auto_voltage_bits(unsigned int millivolts)
|
|
{
|
|
if (millivolts < 1800)
|
|
return 0;
|
|
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)
|
|
{
|
|
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)
|
|
{
|
|
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 = pcf50633_regulator_registers[regulator_id];
|
|
|
|
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:
|
|
volt_bits = ldo_voltage_bits(millivolts);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return pcf50633_reg_write(pcf, regnr, volt_bits);
|
|
}
|
|
|
|
static int pcf50633_regulator_get_voltage(struct regulator_dev *rdev)
|
|
{
|
|
struct pcf50633 *pcf;
|
|
int regulator_id, millivolts, volt_bits;
|
|
u8 regnr;
|
|
|
|
pcf = rdev_get_drvdata(rdev);;
|
|
|
|
regulator_id = rdev_get_id(rdev);
|
|
if (regulator_id >= PCF50633_NUM_REGULATORS)
|
|
return -EINVAL;
|
|
|
|
regnr = pcf50633_regulator_registers[regulator_id];
|
|
|
|
volt_bits = pcf50633_reg_read(pcf, regnr);
|
|
if (volt_bits < 0)
|
|
return -1;
|
|
|
|
switch (regulator_id) {
|
|
case PCF50633_REGULATOR_AUTO:
|
|
millivolts = auto_voltage_value(volt_bits);
|
|
break;
|
|
case PCF50633_REGULATOR_DOWN1:
|
|
millivolts = down_voltage_value(volt_bits);
|
|
break;
|
|
case PCF50633_REGULATOR_DOWN2:
|
|
millivolts = down_voltage_value(volt_bits);
|
|
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:
|
|
millivolts = ldo_voltage_value(volt_bits);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return millivolts * 1000;
|
|
}
|
|
|
|
static int pcf50633_regulator_enable(struct regulator_dev *rdev)
|
|
{
|
|
struct pcf50633 *pcf = rdev_get_drvdata(rdev);
|
|
int regulator_id;
|
|
u8 regnr;
|
|
|
|
regulator_id = rdev_get_id(rdev);
|
|
if (regulator_id >= PCF50633_NUM_REGULATORS)
|
|
return -EINVAL;
|
|
|
|
/* The *ENA register is always one after the *OUT register */
|
|
regnr = pcf50633_regulator_registers[regulator_id] + 1;
|
|
|
|
return pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON,
|
|
PCF50633_REGULATOR_ON);
|
|
}
|
|
|
|
static int pcf50633_regulator_disable(struct regulator_dev *rdev)
|
|
{
|
|
struct pcf50633 *pcf = rdev_get_drvdata(rdev);
|
|
int regulator_id;
|
|
u8 regnr;
|
|
|
|
regulator_id = rdev_get_id(rdev);
|
|
if (regulator_id >= PCF50633_NUM_REGULATORS)
|
|
return -EINVAL;
|
|
|
|
/* the *ENA register is always one after the *OUT register */
|
|
regnr = pcf50633_regulator_registers[regulator_id] + 1;
|
|
|
|
return pcf50633_reg_set_bit_mask(pcf, regnr,
|
|
PCF50633_REGULATOR_ON, 0);
|
|
}
|
|
|
|
static int pcf50633_regulator_is_enabled(struct regulator_dev *rdev)
|
|
{
|
|
struct pcf50633 *pcf = rdev_get_drvdata(rdev);
|
|
int regulator_id = rdev_get_id(rdev);
|
|
u8 regnr;
|
|
|
|
regulator_id = rdev_get_id(rdev);
|
|
if (regulator_id >= PCF50633_NUM_REGULATORS)
|
|
return -EINVAL;
|
|
|
|
/* the *ENA register is always one after the *OUT register */
|
|
regnr = pcf50633_regulator_registers[regulator_id] + 1;
|
|
|
|
return pcf50633_reg_read(pcf, regnr) & PCF50633_REGULATOR_ON;
|
|
}
|
|
|
|
static struct regulator_ops pcf50633_regulator_ops = {
|
|
.set_voltage = pcf50633_regulator_set_voltage,
|
|
.get_voltage = pcf50633_regulator_get_voltage,
|
|
.enable = pcf50633_regulator_enable,
|
|
.disable = pcf50633_regulator_disable,
|
|
.is_enabled = pcf50633_regulator_is_enabled,
|
|
};
|
|
|
|
static struct regulator_desc regulators[] = {
|
|
[PCF50633_REGULATOR_AUTO] =
|
|
PCF50633_REGULATOR("auto", PCF50633_REGULATOR_AUTO),
|
|
[PCF50633_REGULATOR_DOWN1] =
|
|
PCF50633_REGULATOR("down1", PCF50633_REGULATOR_DOWN1),
|
|
[PCF50633_REGULATOR_DOWN2] =
|
|
PCF50633_REGULATOR("down2", PCF50633_REGULATOR_DOWN2),
|
|
[PCF50633_REGULATOR_LDO1] =
|
|
PCF50633_REGULATOR("ldo1", PCF50633_REGULATOR_LDO1),
|
|
[PCF50633_REGULATOR_LDO2] =
|
|
PCF50633_REGULATOR("ldo2", PCF50633_REGULATOR_LDO2),
|
|
[PCF50633_REGULATOR_LDO3] =
|
|
PCF50633_REGULATOR("ldo3", PCF50633_REGULATOR_LDO3),
|
|
[PCF50633_REGULATOR_LDO4] =
|
|
PCF50633_REGULATOR("ldo4", PCF50633_REGULATOR_LDO4),
|
|
[PCF50633_REGULATOR_LDO5] =
|
|
PCF50633_REGULATOR("ldo5", PCF50633_REGULATOR_LDO5),
|
|
[PCF50633_REGULATOR_LDO6] =
|
|
PCF50633_REGULATOR("ldo6", PCF50633_REGULATOR_LDO6),
|
|
[PCF50633_REGULATOR_HCLDO] =
|
|
PCF50633_REGULATOR("hcldo", PCF50633_REGULATOR_HCLDO),
|
|
[PCF50633_REGULATOR_MEMLDO] =
|
|
PCF50633_REGULATOR("memldo", PCF50633_REGULATOR_MEMLDO),
|
|
};
|
|
|
|
static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct regulator_dev *rdev;
|
|
struct pcf50633 *pcf;
|
|
|
|
/* Already set by core driver */
|
|
pcf = platform_get_drvdata(pdev);
|
|
|
|
rdev = regulator_register(®ulators[pdev->id], &pdev->dev,
|
|
pdev->dev.platform_data, pcf);
|
|
if (IS_ERR(rdev))
|
|
return PTR_ERR(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);
|
|
|
|
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");
|