398 строки
10 KiB
C
398 строки
10 KiB
C
/*
|
|
* Regulator support for WM8400
|
|
*
|
|
* Copyright 2008 Wolfson Microelectronics PLC.
|
|
*
|
|
* Author: Mark Brown <broonie@opensource.wolfsonmicro.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/bug.h>
|
|
#include <linux/err.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/mfd/wm8400-private.h>
|
|
|
|
static int wm8400_ldo_is_enabled(struct regulator_dev *dev)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
u16 val;
|
|
|
|
val = wm8400_reg_read(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev));
|
|
return (val & WM8400_LDO1_ENA) != 0;
|
|
}
|
|
|
|
static int wm8400_ldo_enable(struct regulator_dev *dev)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
|
|
return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
|
|
WM8400_LDO1_ENA, WM8400_LDO1_ENA);
|
|
}
|
|
|
|
static int wm8400_ldo_disable(struct regulator_dev *dev)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
|
|
return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
|
|
WM8400_LDO1_ENA, 0);
|
|
}
|
|
|
|
static int wm8400_ldo_list_voltage(struct regulator_dev *dev,
|
|
unsigned selector)
|
|
{
|
|
if (selector > WM8400_LDO1_VSEL_MASK)
|
|
return -EINVAL;
|
|
|
|
if (selector < 15)
|
|
return 900000 + (selector * 50000);
|
|
else
|
|
return 1600000 + ((selector - 14) * 100000);
|
|
}
|
|
|
|
static int wm8400_ldo_get_voltage(struct regulator_dev *dev)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
u16 val;
|
|
|
|
val = wm8400_reg_read(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev));
|
|
val &= WM8400_LDO1_VSEL_MASK;
|
|
|
|
return wm8400_ldo_list_voltage(dev, val);
|
|
}
|
|
|
|
static int wm8400_ldo_set_voltage(struct regulator_dev *dev,
|
|
int min_uV, int max_uV)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
u16 val;
|
|
|
|
if (min_uV < 900000 || min_uV > 3300000)
|
|
return -EINVAL;
|
|
|
|
if (min_uV < 1700000) {
|
|
/* Steps of 50mV from 900mV; */
|
|
val = (min_uV - 850001) / 50000;
|
|
|
|
if ((val * 50000) + 900000 > max_uV)
|
|
return -EINVAL;
|
|
BUG_ON((val * 50000) + 900000 < min_uV);
|
|
} else {
|
|
/* Steps of 100mV from 1700mV */
|
|
val = ((min_uV - 1600001) / 100000);
|
|
|
|
if ((val * 100000) + 1700000 > max_uV)
|
|
return -EINVAL;
|
|
BUG_ON((val * 100000) + 1700000 < min_uV);
|
|
|
|
val += 0xf;
|
|
}
|
|
|
|
return wm8400_set_bits(wm8400, WM8400_LDO1_CONTROL + rdev_get_id(dev),
|
|
WM8400_LDO1_VSEL_MASK, val);
|
|
}
|
|
|
|
static struct regulator_ops wm8400_ldo_ops = {
|
|
.is_enabled = wm8400_ldo_is_enabled,
|
|
.enable = wm8400_ldo_enable,
|
|
.disable = wm8400_ldo_disable,
|
|
.list_voltage = wm8400_ldo_list_voltage,
|
|
.get_voltage = wm8400_ldo_get_voltage,
|
|
.set_voltage = wm8400_ldo_set_voltage,
|
|
};
|
|
|
|
static int wm8400_dcdc_is_enabled(struct regulator_dev *dev)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
|
|
u16 val;
|
|
|
|
val = wm8400_reg_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset);
|
|
return (val & WM8400_DC1_ENA) != 0;
|
|
}
|
|
|
|
static int wm8400_dcdc_enable(struct regulator_dev *dev)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
|
|
|
|
return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
|
|
WM8400_DC1_ENA, WM8400_DC1_ENA);
|
|
}
|
|
|
|
static int wm8400_dcdc_disable(struct regulator_dev *dev)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
|
|
|
|
return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
|
|
WM8400_DC1_ENA, 0);
|
|
}
|
|
|
|
static int wm8400_dcdc_list_voltage(struct regulator_dev *dev,
|
|
unsigned selector)
|
|
{
|
|
if (selector > WM8400_DC1_VSEL_MASK)
|
|
return -EINVAL;
|
|
|
|
return 850000 + (selector * 25000);
|
|
}
|
|
|
|
static int wm8400_dcdc_get_voltage(struct regulator_dev *dev)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
u16 val;
|
|
int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
|
|
|
|
val = wm8400_reg_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset);
|
|
val &= WM8400_DC1_VSEL_MASK;
|
|
|
|
return 850000 + (25000 * val);
|
|
}
|
|
|
|
static int wm8400_dcdc_set_voltage(struct regulator_dev *dev,
|
|
int min_uV, int max_uV)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
u16 val;
|
|
int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
|
|
|
|
if (min_uV < 850000)
|
|
return -EINVAL;
|
|
|
|
val = (min_uV - 825001) / 25000;
|
|
|
|
if (850000 + (25000 * val) > max_uV)
|
|
return -EINVAL;
|
|
BUG_ON(850000 + (25000 * val) < min_uV);
|
|
|
|
return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
|
|
WM8400_DC1_VSEL_MASK, val);
|
|
}
|
|
|
|
static unsigned int wm8400_dcdc_get_mode(struct regulator_dev *dev)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
|
|
u16 data[2];
|
|
int ret;
|
|
|
|
ret = wm8400_block_read(wm8400, WM8400_DCDC1_CONTROL_1 + offset, 2,
|
|
data);
|
|
if (ret != 0)
|
|
return 0;
|
|
|
|
/* Datasheet: hibernate */
|
|
if (data[0] & WM8400_DC1_SLEEP)
|
|
return REGULATOR_MODE_STANDBY;
|
|
|
|
/* Datasheet: standby */
|
|
if (!(data[0] & WM8400_DC1_ACTIVE))
|
|
return REGULATOR_MODE_IDLE;
|
|
|
|
/* Datasheet: active with or without force PWM */
|
|
if (data[1] & WM8400_DC1_FRC_PWM)
|
|
return REGULATOR_MODE_FAST;
|
|
else
|
|
return REGULATOR_MODE_NORMAL;
|
|
}
|
|
|
|
static int wm8400_dcdc_set_mode(struct regulator_dev *dev, unsigned int mode)
|
|
{
|
|
struct wm8400 *wm8400 = rdev_get_drvdata(dev);
|
|
int offset = (rdev_get_id(dev) - WM8400_DCDC1) * 2;
|
|
int ret;
|
|
|
|
switch (mode) {
|
|
case REGULATOR_MODE_FAST:
|
|
/* Datasheet: active with force PWM */
|
|
ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_2 + offset,
|
|
WM8400_DC1_FRC_PWM, WM8400_DC1_FRC_PWM);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
|
|
WM8400_DC1_ACTIVE | WM8400_DC1_SLEEP,
|
|
WM8400_DC1_ACTIVE);
|
|
|
|
case REGULATOR_MODE_NORMAL:
|
|
/* Datasheet: active */
|
|
ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_2 + offset,
|
|
WM8400_DC1_FRC_PWM, 0);
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
|
|
WM8400_DC1_ACTIVE | WM8400_DC1_SLEEP,
|
|
WM8400_DC1_ACTIVE);
|
|
|
|
case REGULATOR_MODE_IDLE:
|
|
/* Datasheet: standby */
|
|
ret = wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
|
|
WM8400_DC1_ACTIVE, 0);
|
|
if (ret != 0)
|
|
return ret;
|
|
return wm8400_set_bits(wm8400, WM8400_DCDC1_CONTROL_1 + offset,
|
|
WM8400_DC1_SLEEP, 0);
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static unsigned int wm8400_dcdc_get_optimum_mode(struct regulator_dev *dev,
|
|
int input_uV, int output_uV,
|
|
int load_uA)
|
|
{
|
|
return REGULATOR_MODE_NORMAL;
|
|
}
|
|
|
|
static struct regulator_ops wm8400_dcdc_ops = {
|
|
.is_enabled = wm8400_dcdc_is_enabled,
|
|
.enable = wm8400_dcdc_enable,
|
|
.disable = wm8400_dcdc_disable,
|
|
.list_voltage = wm8400_dcdc_list_voltage,
|
|
.get_voltage = wm8400_dcdc_get_voltage,
|
|
.set_voltage = wm8400_dcdc_set_voltage,
|
|
.get_mode = wm8400_dcdc_get_mode,
|
|
.set_mode = wm8400_dcdc_set_mode,
|
|
.get_optimum_mode = wm8400_dcdc_get_optimum_mode,
|
|
};
|
|
|
|
static struct regulator_desc regulators[] = {
|
|
{
|
|
.name = "LDO1",
|
|
.id = WM8400_LDO1,
|
|
.ops = &wm8400_ldo_ops,
|
|
.n_voltages = WM8400_LDO1_VSEL_MASK + 1,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "LDO2",
|
|
.id = WM8400_LDO2,
|
|
.ops = &wm8400_ldo_ops,
|
|
.n_voltages = WM8400_LDO2_VSEL_MASK + 1,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "LDO3",
|
|
.id = WM8400_LDO3,
|
|
.ops = &wm8400_ldo_ops,
|
|
.n_voltages = WM8400_LDO3_VSEL_MASK + 1,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "LDO4",
|
|
.id = WM8400_LDO4,
|
|
.ops = &wm8400_ldo_ops,
|
|
.n_voltages = WM8400_LDO4_VSEL_MASK + 1,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "DCDC1",
|
|
.id = WM8400_DCDC1,
|
|
.ops = &wm8400_dcdc_ops,
|
|
.n_voltages = WM8400_DC1_VSEL_MASK + 1,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "DCDC2",
|
|
.id = WM8400_DCDC2,
|
|
.ops = &wm8400_dcdc_ops,
|
|
.n_voltages = WM8400_DC2_VSEL_MASK + 1,
|
|
.type = REGULATOR_VOLTAGE,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __devinit wm8400_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct wm8400 *wm8400 = container_of(pdev, struct wm8400, regulators[pdev->id]);
|
|
struct regulator_dev *rdev;
|
|
|
|
rdev = regulator_register(®ulators[pdev->id], &pdev->dev,
|
|
pdev->dev.platform_data, wm8400);
|
|
|
|
if (IS_ERR(rdev))
|
|
return PTR_ERR(rdev);
|
|
|
|
platform_set_drvdata(pdev, rdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit wm8400_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 wm8400_regulator_driver = {
|
|
.driver = {
|
|
.name = "wm8400-regulator",
|
|
},
|
|
.probe = wm8400_regulator_probe,
|
|
.remove = __devexit_p(wm8400_regulator_remove),
|
|
};
|
|
|
|
/**
|
|
* wm8400_register_regulator - enable software control of a WM8400 regulator
|
|
*
|
|
* This function enables software control of a WM8400 regulator via
|
|
* the regulator API. It is intended to be called from the
|
|
* platform_init() callback of the WM8400 MFD driver.
|
|
*
|
|
* @param dev The WM8400 device to operate on.
|
|
* @param reg The regulator to control.
|
|
* @param initdata Regulator initdata for the regulator.
|
|
*/
|
|
int wm8400_register_regulator(struct device *dev, int reg,
|
|
struct regulator_init_data *initdata)
|
|
{
|
|
struct wm8400 *wm8400 = dev_get_drvdata(dev);
|
|
|
|
if (wm8400->regulators[reg].name)
|
|
return -EBUSY;
|
|
|
|
initdata->driver_data = wm8400;
|
|
|
|
wm8400->regulators[reg].name = "wm8400-regulator";
|
|
wm8400->regulators[reg].id = reg;
|
|
wm8400->regulators[reg].dev.parent = dev;
|
|
wm8400->regulators[reg].dev.platform_data = initdata;
|
|
|
|
return platform_device_register(&wm8400->regulators[reg]);
|
|
}
|
|
EXPORT_SYMBOL_GPL(wm8400_register_regulator);
|
|
|
|
static int __init wm8400_regulator_init(void)
|
|
{
|
|
return platform_driver_register(&wm8400_regulator_driver);
|
|
}
|
|
subsys_initcall(wm8400_regulator_init);
|
|
|
|
static void __exit wm8400_regulator_exit(void)
|
|
{
|
|
platform_driver_unregister(&wm8400_regulator_driver);
|
|
}
|
|
module_exit(wm8400_regulator_exit);
|
|
|
|
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
|
|
MODULE_DESCRIPTION("WM8400 regulator driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:wm8400-regulator");
|