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remarkable-linux/drivers/regulator/ab8500.c
Bengt Jonsson 6909b4522e regulators: Removed macros for initialization of ab8500 regulators 
This patch removes the macros for initializing the regulators.
The purpose is to remove one layer of abstraction and make the
code easier to read.

Signed-off-by: Bengt Jonsson <bengt.g.jonsson@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2011-01-12 14:33:03 +00:00

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/*
* Copyright (C) ST-Ericsson SA 2010
*
* License Terms: GNU General Public License v2
*
* Authors: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
* Bengt Jonsson <bengt.g.jonsson@stericsson.com> for ST-Ericsson
*
* AB8500 peripheral regulators
*
* AB8500 supports the following regulators:
* VAUX1/2/3, VINTCORE, VTVOUT, VAUDIO, VAMIC1/2, VDMIC, VANA
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/mfd/ab8500.h>
#include <linux/mfd/abx500.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/ab8500.h>
/**
* struct ab8500_regulator_info - ab8500 regulator information
* @dev: device pointer
* @desc: regulator description
* @regulator_dev: regulator device
* @max_uV: maximum voltage (for variable voltage supplies)
* @min_uV: minimum voltage (for variable voltage supplies)
* @fixed_uV: typical voltage (for fixed voltage supplies)
* @update_bank: bank to control on/off
* @update_reg: register to control on/off
* @update_mask: mask to enable/disable regulator
* @update_val_enable: bits to enable the regulator in normal (high power) mode
* @voltage_bank: bank to control regulator voltage
* @voltage_reg: register to control regulator voltage
* @voltage_mask: mask to control regulator voltage
* @voltages: supported voltage table
* @voltages_len: number of supported voltages for the regulator
*/
struct ab8500_regulator_info {
struct device *dev;
struct regulator_desc desc;
struct regulator_dev *regulator;
int max_uV;
int min_uV;
int fixed_uV;
u8 update_bank;
u8 update_reg;
u8 update_mask;
u8 update_val_enable;
u8 voltage_bank;
u8 voltage_reg;
u8 voltage_mask;
int const *voltages;
int voltages_len;
};
/* voltage tables for the vauxn/vintcore supplies */
static const int ldo_vauxn_voltages[] = {
1100000,
1200000,
1300000,
1400000,
1500000,
1800000,
1850000,
1900000,
2500000,
2650000,
2700000,
2750000,
2800000,
2900000,
3000000,
3300000,
};
static const int ldo_vaux3_voltages[] = {
1200000,
1500000,
1800000,
2100000,
2500000,
2750000,
2790000,
2910000,
};
static const int ldo_vintcore_voltages[] = {
1200000,
1225000,
1250000,
1275000,
1300000,
1325000,
1350000,
};
static int ab8500_regulator_enable(struct regulator_dev *rdev)
{
int ret;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
ret = abx500_mask_and_set_register_interruptible(info->dev,
info->update_bank, info->update_reg,
info->update_mask, info->update_val_enable);
if (ret < 0)
dev_err(rdev_get_dev(rdev),
"couldn't set enable bits for regulator\n");
dev_vdbg(rdev_get_dev(rdev),
"%s-enable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
info->desc.name, info->update_bank, info->update_reg,
info->update_mask, info->update_val_enable);
return ret;
}
static int ab8500_regulator_disable(struct regulator_dev *rdev)
{
int ret;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
ret = abx500_mask_and_set_register_interruptible(info->dev,
info->update_bank, info->update_reg,
info->update_mask, 0x0);
if (ret < 0)
dev_err(rdev_get_dev(rdev),
"couldn't set disable bits for regulator\n");
dev_vdbg(rdev_get_dev(rdev),
"%s-disable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
info->desc.name, info->update_bank, info->update_reg,
info->update_mask, 0x0);
return ret;
}
static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
{
int ret;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
u8 regval;
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
ret = abx500_get_register_interruptible(info->dev,
info->update_bank, info->update_reg, &regval);
if (ret < 0) {
dev_err(rdev_get_dev(rdev),
"couldn't read 0x%x register\n", info->update_reg);
return ret;
}
dev_vdbg(rdev_get_dev(rdev),
"%s-is_enabled (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
" 0x%x\n",
info->desc.name, info->update_bank, info->update_reg,
info->update_mask, regval);
if (regval & info->update_mask)
return true;
else
return false;
}
static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
{
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
/* return the uV for the fixed regulators */
if (info->fixed_uV)
return info->fixed_uV;
if (selector >= info->voltages_len)
return -EINVAL;
return info->voltages[selector];
}
static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
{
int ret, val;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
u8 regval;
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
ret = abx500_get_register_interruptible(info->dev,
info->voltage_bank, info->voltage_reg, &regval);
if (ret < 0) {
dev_err(rdev_get_dev(rdev),
"couldn't read voltage reg for regulator\n");
return ret;
}
dev_vdbg(rdev_get_dev(rdev),
"%s-get_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
" 0x%x\n",
info->desc.name, info->voltage_bank, info->voltage_reg,
info->voltage_mask, regval);
/* vintcore has a different layout */
val = regval & info->voltage_mask;
if (info->desc.id == AB8500_LDO_INTCORE)
ret = info->voltages[val >> 0x3];
else
ret = info->voltages[val];
return ret;
}
static int ab8500_get_best_voltage_index(struct regulator_dev *rdev,
int min_uV, int max_uV)
{
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
int i;
/* check the supported voltage */
for (i = 0; i < info->voltages_len; i++) {
if ((info->voltages[i] >= min_uV) &&
(info->voltages[i] <= max_uV))
return i;
}
return -EINVAL;
}
static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
int min_uV, int max_uV,
unsigned *selector)
{
int ret;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
u8 regval;
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
/* get the appropriate voltages within the range */
ret = ab8500_get_best_voltage_index(rdev, min_uV, max_uV);
if (ret < 0) {
dev_err(rdev_get_dev(rdev),
"couldn't get best voltage for regulator\n");
return ret;
}
*selector = ret;
/* set the registers for the request */
regval = (u8)ret;
ret = abx500_mask_and_set_register_interruptible(info->dev,
info->voltage_bank, info->voltage_reg,
info->voltage_mask, regval);
if (ret < 0)
dev_err(rdev_get_dev(rdev),
"couldn't set voltage reg for regulator\n");
dev_vdbg(rdev_get_dev(rdev),
"%s-set_voltage (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
" 0x%x\n",
info->desc.name, info->voltage_bank, info->voltage_reg,
info->voltage_mask, regval);
return ret;
}
static struct regulator_ops ab8500_regulator_ops = {
.enable = ab8500_regulator_enable,
.disable = ab8500_regulator_disable,
.is_enabled = ab8500_regulator_is_enabled,
.get_voltage = ab8500_regulator_get_voltage,
.set_voltage = ab8500_regulator_set_voltage,
.list_voltage = ab8500_list_voltage,
};
static int ab8500_fixed_get_voltage(struct regulator_dev *rdev)
{
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
return info->fixed_uV;
}
static struct regulator_ops ab8500_regulator_fixed_ops = {
.enable = ab8500_regulator_enable,
.disable = ab8500_regulator_disable,
.is_enabled = ab8500_regulator_is_enabled,
.get_voltage = ab8500_fixed_get_voltage,
.list_voltage = ab8500_list_voltage,
};
static struct ab8500_regulator_info
ab8500_regulator_info[AB8500_NUM_REGULATORS] = {
/*
* Variable Voltage Regulators
* name, min mV, max mV,
* update bank, reg, mask, enable val
* volt bank, reg, mask, table, table length
*/
[AB8500_LDO_AUX1] = {
.desc = {
.name = "LDO-AUX1",
.ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUX1,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vauxn_voltages),
},
.min_uV = 1100000,
.max_uV = 3300000,
.update_bank = 0x04,
.update_reg = 0x09,
.update_mask = 0x03,
.update_val_enable = 0x01,
.voltage_bank = 0x04,
.voltage_reg = 0x1f,
.voltage_mask = 0x0f,
.voltages = ldo_vauxn_voltages,
.voltages_len = ARRAY_SIZE(ldo_vauxn_voltages),
},
[AB8500_LDO_AUX2] = {
.desc = {
.name = "LDO-AUX2",
.ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUX2,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vauxn_voltages),
},
.min_uV = 1100000,
.max_uV = 3300000,
.update_bank = 0x04,
.update_reg = 0x09,
.update_mask = 0x0c,
.update_val_enable = 0x04,
.voltage_bank = 0x04,
.voltage_reg = 0x20,
.voltage_mask = 0x0f,
.voltages = ldo_vauxn_voltages,
.voltages_len = ARRAY_SIZE(ldo_vauxn_voltages),
},
[AB8500_LDO_AUX3] = {
.desc = {
.name = "LDO-AUX3",
.ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUX3,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vaux3_voltages),
},
.min_uV = 1100000,
.max_uV = 3300000,
.update_bank = 0x04,
.update_reg = 0x0a,
.update_mask = 0x03,
.update_val_enable = 0x01,
.voltage_bank = 0x04,
.voltage_reg = 0x21,
.voltage_mask = 0x07,
.voltages = ldo_vaux3_voltages,
.voltages_len = ARRAY_SIZE(ldo_vaux3_voltages),
},
[AB8500_LDO_INTCORE] = {
.desc = {
.name = "LDO-INTCORE",
.ops = &ab8500_regulator_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_INTCORE,
.owner = THIS_MODULE,
.n_voltages = ARRAY_SIZE(ldo_vintcore_voltages),
},
.min_uV = 1100000,
.max_uV = 3300000,
.update_bank = 0x03,
.update_reg = 0x80,
.update_mask = 0x44,
.update_val_enable = 0x04,
.voltage_bank = 0x03,
.voltage_reg = 0x80,
.voltage_mask = 0x38,
.voltages = ldo_vintcore_voltages,
.voltages_len = ARRAY_SIZE(ldo_vintcore_voltages),
},
/*
* Fixed Voltage Regulators
* name, fixed mV,
* update bank, reg, mask, enable val
*/
[AB8500_LDO_TVOUT] = {
.desc = {
.name = "LDO-TVOUT",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_TVOUT,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 2000000,
.update_bank = 0x03,
.update_reg = 0x80,
.update_mask = 0x82,
.update_val_enable = 0x02,
},
[AB8500_LDO_AUDIO] = {
.desc = {
.name = "LDO-AUDIO",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_AUDIO,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 2000000,
.update_bank = 0x03,
.update_reg = 0x83,
.update_mask = 0x02,
.update_val_enable = 0x02,
},
[AB8500_LDO_ANAMIC1] = {
.desc = {
.name = "LDO-ANAMIC1",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_ANAMIC1,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 2050000,
.update_bank = 0x03,
.update_reg = 0x83,
.update_mask = 0x08,
.update_val_enable = 0x08,
},
[AB8500_LDO_ANAMIC2] = {
.desc = {
.name = "LDO-ANAMIC2",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_ANAMIC2,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 2050000,
.update_bank = 0x03,
.update_reg = 0x83,
.update_mask = 0x10,
.update_val_enable = 0x10,
},
[AB8500_LDO_DMIC] = {
.desc = {
.name = "LDO-DMIC",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_DMIC,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 1800000,
.update_bank = 0x03,
.update_reg = 0x83,
.update_mask = 0x04,
.update_val_enable = 0x04,
},
[AB8500_LDO_ANA] = {
.desc = {
.name = "LDO-ANA",
.ops = &ab8500_regulator_fixed_ops,
.type = REGULATOR_VOLTAGE,
.id = AB8500_LDO_ANA,
.owner = THIS_MODULE,
.n_voltages = 1,
},
.fixed_uV = 1200000,
.update_bank = 0x04,
.update_reg = 0x06,
.update_mask = 0x0c,
.update_val_enable = 0x04,
},
};
static __devinit int ab8500_regulator_probe(struct platform_device *pdev)
{
struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
struct ab8500_platform_data *pdata;
int i, err;
if (!ab8500) {
dev_err(&pdev->dev, "null mfd parent\n");
return -EINVAL;
}
pdata = dev_get_platdata(ab8500->dev);
if (!pdata) {
dev_err(&pdev->dev, "null pdata\n");
return -EINVAL;
}
/* make sure the platform data has the correct size */
if (pdata->num_regulator != ARRAY_SIZE(ab8500_regulator_info)) {
dev_err(&pdev->dev, "platform configuration error\n");
return -EINVAL;
}
/* register all regulators */
for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
struct ab8500_regulator_info *info = NULL;
/* assign per-regulator data */
info = &ab8500_regulator_info[i];
info->dev = &pdev->dev;
/* fix for hardware before ab8500v2.0 */
if (abx500_get_chip_id(info->dev) < 0x20) {
if (info->desc.id == AB8500_LDO_AUX3) {
info->desc.n_voltages =
ARRAY_SIZE(ldo_vauxn_voltages);
info->voltages = ldo_vauxn_voltages;
info->voltages_len =
ARRAY_SIZE(ldo_vauxn_voltages);
info->voltage_mask = 0xf;
}
}
/* register regulator with framework */
info->regulator = regulator_register(&info->desc, &pdev->dev,
&pdata->regulator[i], info);
if (IS_ERR(info->regulator)) {
err = PTR_ERR(info->regulator);
dev_err(&pdev->dev, "failed to register regulator %s\n",
info->desc.name);
/* when we fail, un-register all earlier regulators */
while (--i >= 0) {
info = &ab8500_regulator_info[i];
regulator_unregister(info->regulator);
}
return err;
}
dev_vdbg(rdev_get_dev(info->regulator),
"%s-probed\n", info->desc.name);
}
return 0;
}
static __devexit int ab8500_regulator_remove(struct platform_device *pdev)
{
int i;
for (i = 0; i < ARRAY_SIZE(ab8500_regulator_info); i++) {
struct ab8500_regulator_info *info = NULL;
info = &ab8500_regulator_info[i];
dev_vdbg(rdev_get_dev(info->regulator),
"%s-remove\n", info->desc.name);
regulator_unregister(info->regulator);
}
return 0;
}
static struct platform_driver ab8500_regulator_driver = {
.probe = ab8500_regulator_probe,
.remove = __devexit_p(ab8500_regulator_remove),
.driver = {
.name = "ab8500-regulator",
.owner = THIS_MODULE,
},
};
static int __init ab8500_regulator_init(void)
{
int ret;
ret = platform_driver_register(&ab8500_regulator_driver);
if (ret != 0)
pr_err("Failed to register ab8500 regulator: %d\n", ret);
return ret;
}
subsys_initcall(ab8500_regulator_init);
static void __exit ab8500_regulator_exit(void)
{
platform_driver_unregister(&ab8500_regulator_driver);
}
module_exit(ab8500_regulator_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
MODULE_DESCRIPTION("Regulator Driver for ST-Ericsson AB8500 Mixed-Sig PMIC");
MODULE_ALIAS("platform:ab8500-regulator");
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