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/*
* 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/module.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_sel(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 val;
}
static int wm8400_ldo_set_voltage(struct regulator_dev *dev,
int min_uV, int max_uV, unsigned *selector)
{
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;
}
*selector = val;
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_sel = wm8400_ldo_get_voltage_sel,
.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_sel(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 val;
}
static int wm8400_dcdc_set_voltage(struct regulator_dev *dev,
int min_uV, int max_uV, unsigned *selector)
{
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);
*selector = val;
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,
|