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linux-2.6/drivers/regulator/tps65912-regulator.c
Mark Brown c172708d38 regulator: core: Use a struct to pass in regulator runtime configuration 
Rather than adding new arguments to regulator_register() every time we
want to add a new bit of dynamic information at runtime change the function
to take these via a struct. By doing this we avoid needing to do further
changes like the recent addition of device tree support which required each
regulator driver to be updated to take an additional parameter.

The regulator_desc which should (mostly) be static data is still passed
separately as most drivers are able to configure this statically at build
time.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-04-09 12:37:09 +01:00

568 lines
13 KiB
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/*
* tps65912.c -- TI tps65912
*
* Copyright 2011 Texas Instruments Inc.
*
* Author: Margarita Olaya Cabrera <magi@slimlogic.co.uk>
*
* 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.
*
* This driver is based on wm8350 implementation.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/mfd/tps65912.h>
/* DCDC's */
#define TPS65912_REG_DCDC1 0
#define TPS65912_REG_DCDC2 1
#define TPS65912_REG_DCDC3 2
#define TPS65912_REG_DCDC4 3
/* LDOs */
#define TPS65912_REG_LDO1 4
#define TPS65912_REG_LDO2 5
#define TPS65912_REG_LDO3 6
#define TPS65912_REG_LDO4 7
#define TPS65912_REG_LDO5 8
#define TPS65912_REG_LDO6 9
#define TPS65912_REG_LDO7 10
#define TPS65912_REG_LDO8 11
#define TPS65912_REG_LDO9 12
#define TPS65912_REG_LDO10 13
/* Number of step-down converters available */
#define TPS65912_NUM_DCDC 4
/* Number of LDO voltage regulators available */
#define TPS65912_NUM_LDO 10
/* Number of total regulators available */
#define TPS65912_NUM_REGULATOR (TPS65912_NUM_DCDC + TPS65912_NUM_LDO)
#define TPS65912_REG_ENABLED 0x80
#define OP_SELREG_MASK 0x40
#define OP_SELREG_SHIFT 6
struct tps_info {
const char *name;
};
static struct tps_info tps65912_regs[] = {
{
.name = "DCDC1",
},
{
.name = "DCDC2",
},
{
.name = "DCDC3",
},
{
.name = "DCDC4",
},
{
.name = "LDO1",
},
{
.name = "LDO2",
},
{
.name = "LDO3",
},
{
.name = "LDO4",
},
{
.name = "LDO5",
},
{
.name = "LDO6",
},
{
.name = "LDO7",
},
{
.name = "LDO8",
},
{
.name = "LDO9",
},
{
.name = "LDO10",
},
};
struct tps65912_reg {
struct regulator_desc desc[TPS65912_NUM_REGULATOR];
struct tps65912 *mfd;
struct regulator_dev *rdev[TPS65912_NUM_REGULATOR];
struct tps_info *info[TPS65912_NUM_REGULATOR];
/* for read/write access */
struct mutex io_lock;
int mode;
int (*get_ctrl_reg)(int);
int dcdc_range[TPS65912_NUM_DCDC];
int pwm_mode_reg;
int eco_reg;
};
static int tps65912_get_range(struct tps65912_reg *pmic, int id)
{
struct tps65912 *mfd = pmic->mfd;
int range;
switch (id) {
case TPS65912_REG_DCDC1:
range = tps65912_reg_read(mfd, TPS65912_DCDC1_LIMIT);
break;
case TPS65912_REG_DCDC2:
range = tps65912_reg_read(mfd, TPS65912_DCDC2_LIMIT);
break;
case TPS65912_REG_DCDC3:
range = tps65912_reg_read(mfd, TPS65912_DCDC3_LIMIT);
break;
case TPS65912_REG_DCDC4:
range = tps65912_reg_read(mfd, TPS65912_DCDC4_LIMIT);
break;
default:
return 0;
}
if (range >= 0)
range = (range & DCDC_LIMIT_RANGE_MASK)
>> DCDC_LIMIT_RANGE_SHIFT;
pmic->dcdc_range[id] = range;
return range;
}
static unsigned long tps65912_vsel_to_uv_range0(u8 vsel)
{
unsigned long uv;
uv = ((vsel * 12500) + 500000);
return uv;
}
static unsigned long tps65912_vsel_to_uv_range1(u8 vsel)
{
unsigned long uv;
uv = ((vsel * 12500) + 700000);
return uv;
}
static unsigned long tps65912_vsel_to_uv_range2(u8 vsel)
{
unsigned long uv;
uv = ((vsel * 25000) + 500000);
return uv;
}
static unsigned long tps65912_vsel_to_uv_range3(u8 vsel)
{
unsigned long uv;
if (vsel == 0x3f)
uv = 3800000;
else
uv = ((vsel * 50000) + 500000);
return uv;
}
static unsigned long tps65912_vsel_to_uv_ldo(u8 vsel)
{
unsigned long uv = 0;
if (vsel <= 32)
uv = ((vsel * 25000) + 800000);
else if (vsel > 32 && vsel <= 60)
uv = (((vsel - 32) * 50000) + 1600000);
else if (vsel > 60)
uv = (((vsel - 60) * 100000) + 3000000);
return uv;
}
static int tps65912_get_ctrl_register(int id)
{
if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4)
return id * 3 + TPS65912_DCDC1_AVS;
else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10)
return id - TPS65912_REG_LDO5 + TPS65912_LDO5;
else
return -EINVAL;
}
static int tps65912_get_sel_register(struct tps65912_reg *pmic, int id)
{
struct tps65912 *mfd = pmic->mfd;
int opvsel;
u8 reg = 0;
if (id >= TPS65912_REG_DCDC1 && id <= TPS65912_REG_LDO4) {
opvsel = tps65912_reg_read(mfd, id * 3 + TPS65912_DCDC1_OP);
if (opvsel & OP_SELREG_MASK)
reg = id * 3 + TPS65912_DCDC1_AVS;
else
reg = id * 3 + TPS65912_DCDC1_OP;
} else if (id >= TPS65912_REG_LDO5 && id <= TPS65912_REG_LDO10) {
reg = id - TPS65912_REG_LDO5 + TPS65912_LDO5;
} else {
return -EINVAL;
}
return reg;
}
static int tps65912_get_mode_regiters(struct tps65912_reg *pmic, int id)
{
switch (id) {
case TPS65912_REG_DCDC1:
pmic->pwm_mode_reg = TPS65912_DCDC1_CTRL;
pmic->eco_reg = TPS65912_DCDC1_AVS;
break;
case TPS65912_REG_DCDC2:
pmic->pwm_mode_reg = TPS65912_DCDC2_CTRL;
pmic->eco_reg = TPS65912_DCDC2_AVS;
break;
case TPS65912_REG_DCDC3:
pmic->pwm_mode_reg = TPS65912_DCDC3_CTRL;
pmic->eco_reg = TPS65912_DCDC3_AVS;
break;
case TPS65912_REG_DCDC4:
pmic->pwm_mode_reg = TPS65912_DCDC4_CTRL;
pmic->eco_reg = TPS65912_DCDC4_AVS;
break;
default:
return -EINVAL;
}
return 0;
}
static int tps65912_reg_is_enabled(struct regulator_dev *dev)
{
struct tps65912_reg *pmic = rdev_get_drvdata(dev);
struct tps65912 *mfd = pmic->mfd;
int reg, value, id = rdev_get_id(dev);
if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
return -EINVAL;
reg = pmic->get_ctrl_reg(id);
if (reg < 0)
return reg;
value = tps65912_reg_read(mfd, reg);
if (value < 0)
return value;
return value & TPS65912_REG_ENABLED;
}
static int tps65912_reg_enable(struct regulator_dev *dev)
{
struct tps65912_reg *pmic = rdev_get_drvdata(dev);
struct tps65912 *mfd = pmic->mfd;
int id = rdev_get_id(dev);
int reg;
if (id < TPS65912_REG_DCDC1 || id > TPS65912_REG_LDO10)
return -EINVAL;
reg = pmic->get_ctrl_reg(id);
if (reg < 0)
return reg;
return tps65912_set_bits(mfd, reg, TPS65912_REG_ENABLED);
}
static int tps65912_reg_disable(struct regulator_dev *dev)
{
struct tps65912_reg *pmic = rdev_get_drvdata(dev);
struct tps65912 *mfd = pmic->mfd;
int id = rdev_get_id(dev), reg;
reg = pmic->get_ctrl_reg(id);
if (reg < 0)
return reg;
return tps65912_clear_bits(mfd, reg, TPS65912_REG_ENABLED);
}
static int tps65912_set_mode(struct regulator_dev *dev, unsigned int mode)
{
struct tps65912_reg *pmic = rdev_get_drvdata(dev);
struct tps65912 *mfd = pmic->mfd;
int pwm_mode, eco, id = rdev_get_id(dev);
tps65912_get_mode_regiters(pmic, id);
pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
eco = tps65912_reg_read(mfd, pmic->eco_reg);
pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
eco &= DCDC_AVS_ECO_MASK;
switch (mode) {
case REGULATOR_MODE_FAST:
/* Verify if mode alredy set */
if (pwm_mode && !eco)
break;
tps65912_set_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
break;
case REGULATOR_MODE_NORMAL:
case REGULATOR_MODE_IDLE:
if (!pwm_mode && !eco)
break;
tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
tps65912_clear_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
break;
case REGULATOR_MODE_STANDBY:
if (!pwm_mode && eco)
break;
tps65912_clear_bits(mfd, pmic->pwm_mode_reg, DCDCCTRL_DCDC_MODE_MASK);
tps65912_set_bits(mfd, pmic->eco_reg, DCDC_AVS_ECO_MASK);
break;
default:
return -EINVAL;
}
return 0;
}
static unsigned int tps65912_get_mode(struct regulator_dev *dev)
{
struct tps65912_reg *pmic = rdev_get_drvdata(dev);
struct tps65912 *mfd = pmic->mfd;
int pwm_mode, eco, mode = 0, id = rdev_get_id(dev);
tps65912_get_mode_regiters(pmic, id);
pwm_mode = tps65912_reg_read(mfd, pmic->pwm_mode_reg);
eco = tps65912_reg_read(mfd, pmic->eco_reg);
pwm_mode &= DCDCCTRL_DCDC_MODE_MASK;
eco &= DCDC_AVS_ECO_MASK;
if (pwm_mode && !eco)
mode = REGULATOR_MODE_FAST;
else if (!pwm_mode && !eco)
mode = REGULATOR_MODE_NORMAL;
else if (!pwm_mode && eco)
mode = REGULATOR_MODE_STANDBY;
return mode;
}
static int tps65912_list_voltage(struct regulator_dev *dev, unsigned selector)
{
struct tps65912_reg *pmic = rdev_get_drvdata(dev);
int range, voltage = 0, id = rdev_get_id(dev);
if (id >= TPS65912_REG_LDO1 && id <= TPS65912_REG_LDO10)
return tps65912_vsel_to_uv_ldo(selector);
if (id > TPS65912_REG_DCDC4)
return -EINVAL;
range = pmic->dcdc_range[id];
switch (range) {
case 0:
/* 0.5 - 1.2875V in 12.5mV steps */
voltage = tps65912_vsel_to_uv_range0(selector);
break;
case 1:
/* 0.7 - 1.4875V in 12.5mV steps */
voltage = tps65912_vsel_to_uv_range1(selector);
break;
case 2:
/* 0.5 - 2.075V in 25mV steps */
voltage = tps65912_vsel_to_uv_range2(selector);
break;
case 3:
/* 0.5 - 3.8V in 50mV steps */
voltage = tps65912_vsel_to_uv_range3(selector);
break;
}
return voltage;
}
static int tps65912_get_voltage(struct regulator_dev *dev)
{
struct tps65912_reg *pmic = rdev_get_drvdata(dev);
struct tps65912 *mfd = pmic->mfd;
int id = rdev_get_id(dev);
int reg, vsel;
reg = tps65912_get_sel_register(pmic, id);
if (reg < 0)
return reg;
vsel = tps65912_reg_read(mfd, reg);
vsel &= 0x3F;
return tps65912_list_voltage(dev, vsel);
}
static int tps65912_set_voltage_sel(struct regulator_dev *dev,
unsigned selector)
{
struct tps65912_reg *pmic = rdev_get_drvdata(dev);
struct tps65912 *mfd = pmic->mfd;
int id = rdev_get_id(dev);
int value;
u8 reg;
reg = tps65912_get_sel_register(pmic, id);
value = tps65912_reg_read(mfd, reg);
value &= 0xC0;
return tps65912_reg_write(mfd, reg, selector | value);
}
/* Operations permitted on DCDCx */
static struct regulator_ops tps65912_ops_dcdc = {
.is_enabled = tps65912_reg_is_enabled,
.enable = tps65912_reg_enable,
.disable = tps65912_reg_disable,
.set_mode = tps65912_set_mode,
.get_mode = tps65912_get_mode,
.get_voltage = tps65912_get_voltage,
.set_voltage_sel = tps65912_set_voltage_sel,
.list_voltage = tps65912_list_voltage,
};
/* Operations permitted on LDOx */
static struct regulator_ops tps65912_ops_ldo = {
.is_enabled = tps65912_reg_is_enabled,
.enable = tps65912_reg_enable,
.disable = tps65912_reg_disable,
.get_voltage = tps65912_get_voltage,
.set_voltage_sel = tps65912_set_voltage_sel,
.list_voltage = tps65912_list_voltage,
};
static __devinit int tps65912_probe(struct platform_device *pdev)
{
struct tps65912 *tps65912 = dev_get_drvdata(pdev->dev.parent);
struct regulator_config config = { };
struct tps_info *info;
struct regulator_init_data *reg_data;
struct regulator_dev *rdev;
struct tps65912_reg *pmic;
struct tps65912_board *pmic_plat_data;
int i, err;
pmic_plat_data = dev_get_platdata(tps65912->dev);
if (!pmic_plat_data)
return -EINVAL;
reg_data = pmic_plat_data->tps65912_pmic_init_data;
pmic = kzalloc(sizeof(*pmic), GFP_KERNEL);
if (!pmic)
return -ENOMEM;
mutex_init(&pmic->io_lock);
pmic->mfd = tps65912;
platform_set_drvdata(pdev, pmic);
pmic->get_ctrl_reg = &tps65912_get_ctrl_register;
info = tps65912_regs;
for (i = 0; i < TPS65912_NUM_REGULATOR; i++, info++, reg_data++) {
int range = 0;
/* Register the regulators */
pmic->info[i] = info;
pmic->desc[i].name = info->name;
pmic->desc[i].id = i;
pmic->desc[i].n_voltages = 64;
pmic->desc[i].ops = (i > TPS65912_REG_DCDC4 ?
&tps65912_ops_ldo : &tps65912_ops_dcdc);
pmic->desc[i].type = REGULATOR_VOLTAGE;
pmic->desc[i].owner = THIS_MODULE;
range = tps65912_get_range(pmic, i);
config.dev = tps65912->dev;
config.init_data = reg_data;
config.driver_data = pmic;
rdev = regulator_register(&pmic->desc[i], &config);
if (IS_ERR(rdev)) {
dev_err(tps65912->dev,
"failed to register %s regulator\n",
pdev->name);
err = PTR_ERR(rdev);
goto err;
}
/* Save regulator for cleanup */
pmic->rdev[i] = rdev;
}
return 0;
err:
while (--i >= 0)
regulator_unregister(pmic->rdev[i]);
kfree(pmic);
return err;
}
static int __devexit tps65912_remove(struct platform_device *pdev)
{
struct tps65912_reg *tps65912_reg = platform_get_drvdata(pdev);
int i;
for (i = 0; i < TPS65912_NUM_REGULATOR; i++)
regulator_unregister(tps65912_reg->rdev[i]);
kfree(tps65912_reg);
return 0;
}
static struct platform_driver tps65912_driver = {
.driver = {
.name = "tps65912-pmic",
.owner = THIS_MODULE,
},
.probe = tps65912_probe,
.remove = __devexit_p(tps65912_remove),
};
static int __init tps65912_init(void)
{
return platform_driver_register(&tps65912_driver);
}
subsys_initcall(tps65912_init);
static void __exit tps65912_cleanup(void)
{
platform_driver_unregister(&tps65912_driver);
}
module_exit(tps65912_cleanup);
MODULE_AUTHOR("Margarita Olaya Cabrera <magi@slimlogic.co.uk>");
MODULE_DESCRIPTION("TPS65912 voltage regulator driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:tps65912-pmic");
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