mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 17:54:13 +08:00
6c794b2654
A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
347 lines
9.2 KiB
C
347 lines
9.2 KiB
C
/*
|
|
* Regulators driver for Maxim max8925
|
|
*
|
|
* Copyright (C) 2009 Marvell International Ltd.
|
|
* Haojian Zhuang <haojian.zhuang@marvell.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/err.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regulator/driver.h>
|
|
#include <linux/regulator/machine.h>
|
|
#include <linux/mfd/max8925.h>
|
|
#include <linux/of.h>
|
|
#include <linux/regulator/of_regulator.h>
|
|
|
|
#define SD1_DVM_VMIN 850000
|
|
#define SD1_DVM_VMAX 1000000
|
|
#define SD1_DVM_STEP 50000
|
|
#define SD1_DVM_SHIFT 5 /* SDCTL1 bit5 */
|
|
#define SD1_DVM_EN 6 /* SDV1 bit 6 */
|
|
|
|
/* bit definitions in LDO control registers */
|
|
#define LDO_SEQ_I2C 0x7 /* Power U/D by i2c */
|
|
#define LDO_SEQ_MASK 0x7 /* Power U/D sequence mask */
|
|
#define LDO_SEQ_SHIFT 2 /* Power U/D sequence offset */
|
|
#define LDO_I2C_EN 0x1 /* Enable by i2c */
|
|
#define LDO_I2C_EN_MASK 0x1 /* Enable mask by i2c */
|
|
#define LDO_I2C_EN_SHIFT 0 /* Enable offset by i2c */
|
|
|
|
struct max8925_regulator_info {
|
|
struct regulator_desc desc;
|
|
struct i2c_client *i2c;
|
|
|
|
int vol_reg;
|
|
int enable_reg;
|
|
};
|
|
|
|
static int max8925_set_voltage_sel(struct regulator_dev *rdev,
|
|
unsigned int selector)
|
|
{
|
|
struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
|
|
unsigned char mask = rdev->desc->n_voltages - 1;
|
|
|
|
return max8925_set_bits(info->i2c, info->vol_reg, mask, selector);
|
|
}
|
|
|
|
static int max8925_get_voltage_sel(struct regulator_dev *rdev)
|
|
{
|
|
struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
|
|
unsigned char data, mask;
|
|
int ret;
|
|
|
|
ret = max8925_reg_read(info->i2c, info->vol_reg);
|
|
if (ret < 0)
|
|
return ret;
|
|
mask = rdev->desc->n_voltages - 1;
|
|
data = ret & mask;
|
|
|
|
return data;
|
|
}
|
|
|
|
static int max8925_enable(struct regulator_dev *rdev)
|
|
{
|
|
struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
|
|
|
|
return max8925_set_bits(info->i2c, info->enable_reg,
|
|
LDO_SEQ_MASK << LDO_SEQ_SHIFT |
|
|
LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
|
|
LDO_SEQ_I2C << LDO_SEQ_SHIFT |
|
|
LDO_I2C_EN << LDO_I2C_EN_SHIFT);
|
|
}
|
|
|
|
static int max8925_disable(struct regulator_dev *rdev)
|
|
{
|
|
struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
|
|
|
|
return max8925_set_bits(info->i2c, info->enable_reg,
|
|
LDO_SEQ_MASK << LDO_SEQ_SHIFT |
|
|
LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT,
|
|
LDO_SEQ_I2C << LDO_SEQ_SHIFT);
|
|
}
|
|
|
|
static int max8925_is_enabled(struct regulator_dev *rdev)
|
|
{
|
|
struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
|
|
int ldo_seq, ret;
|
|
|
|
ret = max8925_reg_read(info->i2c, info->enable_reg);
|
|
if (ret < 0)
|
|
return ret;
|
|
ldo_seq = (ret >> LDO_SEQ_SHIFT) & LDO_SEQ_MASK;
|
|
if (ldo_seq != LDO_SEQ_I2C)
|
|
return 1;
|
|
else
|
|
return ret & (LDO_I2C_EN_MASK << LDO_I2C_EN_SHIFT);
|
|
}
|
|
|
|
static int max8925_set_dvm_voltage(struct regulator_dev *rdev, int uV)
|
|
{
|
|
struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
|
|
unsigned char data, mask;
|
|
|
|
if (uV < SD1_DVM_VMIN || uV > SD1_DVM_VMAX)
|
|
return -EINVAL;
|
|
|
|
data = DIV_ROUND_UP(uV - SD1_DVM_VMIN, SD1_DVM_STEP);
|
|
data <<= SD1_DVM_SHIFT;
|
|
mask = 3 << SD1_DVM_SHIFT;
|
|
|
|
return max8925_set_bits(info->i2c, info->enable_reg, mask, data);
|
|
}
|
|
|
|
static int max8925_set_dvm_enable(struct regulator_dev *rdev)
|
|
{
|
|
struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
|
|
|
|
return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN,
|
|
1 << SD1_DVM_EN);
|
|
}
|
|
|
|
static int max8925_set_dvm_disable(struct regulator_dev *rdev)
|
|
{
|
|
struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
|
|
|
|
return max8925_set_bits(info->i2c, info->vol_reg, 1 << SD1_DVM_EN, 0);
|
|
}
|
|
|
|
static struct regulator_ops max8925_regulator_sdv_ops = {
|
|
.map_voltage = regulator_map_voltage_linear,
|
|
.list_voltage = regulator_list_voltage_linear,
|
|
.set_voltage_sel = max8925_set_voltage_sel,
|
|
.get_voltage_sel = max8925_get_voltage_sel,
|
|
.enable = max8925_enable,
|
|
.disable = max8925_disable,
|
|
.is_enabled = max8925_is_enabled,
|
|
.set_suspend_voltage = max8925_set_dvm_voltage,
|
|
.set_suspend_enable = max8925_set_dvm_enable,
|
|
.set_suspend_disable = max8925_set_dvm_disable,
|
|
};
|
|
|
|
static struct regulator_ops max8925_regulator_ldo_ops = {
|
|
.map_voltage = regulator_map_voltage_linear,
|
|
.list_voltage = regulator_list_voltage_linear,
|
|
.set_voltage_sel = max8925_set_voltage_sel,
|
|
.get_voltage_sel = max8925_get_voltage_sel,
|
|
.enable = max8925_enable,
|
|
.disable = max8925_disable,
|
|
.is_enabled = max8925_is_enabled,
|
|
};
|
|
|
|
#define MAX8925_SDV(_id, min, max, step) \
|
|
{ \
|
|
.desc = { \
|
|
.name = "SDV" #_id, \
|
|
.ops = &max8925_regulator_sdv_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.id = MAX8925_ID_SD##_id, \
|
|
.owner = THIS_MODULE, \
|
|
.n_voltages = 64, \
|
|
.min_uV = min * 1000, \
|
|
.uV_step = step * 1000, \
|
|
}, \
|
|
.vol_reg = MAX8925_SDV##_id, \
|
|
.enable_reg = MAX8925_SDCTL##_id, \
|
|
}
|
|
|
|
#define MAX8925_LDO(_id, min, max, step) \
|
|
{ \
|
|
.desc = { \
|
|
.name = "LDO" #_id, \
|
|
.ops = &max8925_regulator_ldo_ops, \
|
|
.type = REGULATOR_VOLTAGE, \
|
|
.id = MAX8925_ID_LDO##_id, \
|
|
.owner = THIS_MODULE, \
|
|
.n_voltages = 64, \
|
|
.min_uV = min * 1000, \
|
|
.uV_step = step * 1000, \
|
|
}, \
|
|
.vol_reg = MAX8925_LDOVOUT##_id, \
|
|
.enable_reg = MAX8925_LDOCTL##_id, \
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct of_regulator_match max8925_regulator_matches[] = {
|
|
{ .name = "SDV1",},
|
|
{ .name = "SDV2",},
|
|
{ .name = "SDV3",},
|
|
{ .name = "LDO1",},
|
|
{ .name = "LDO2",},
|
|
{ .name = "LDO3",},
|
|
{ .name = "LDO4",},
|
|
{ .name = "LDO5",},
|
|
{ .name = "LDO6",},
|
|
{ .name = "LDO7",},
|
|
{ .name = "LDO8",},
|
|
{ .name = "LDO9",},
|
|
{ .name = "LDO10",},
|
|
{ .name = "LDO11",},
|
|
{ .name = "LDO12",},
|
|
{ .name = "LDO13",},
|
|
{ .name = "LDO14",},
|
|
{ .name = "LDO15",},
|
|
{ .name = "LDO16",},
|
|
{ .name = "LDO17",},
|
|
{ .name = "LDO18",},
|
|
{ .name = "LDO19",},
|
|
{ .name = "LDO20",},
|
|
};
|
|
#endif
|
|
|
|
static struct max8925_regulator_info max8925_regulator_info[] = {
|
|
MAX8925_SDV(1, 637.5, 1425, 12.5),
|
|
MAX8925_SDV(2, 650, 2225, 25),
|
|
MAX8925_SDV(3, 750, 3900, 50),
|
|
|
|
MAX8925_LDO(1, 750, 3900, 50),
|
|
MAX8925_LDO(2, 650, 2250, 25),
|
|
MAX8925_LDO(3, 650, 2250, 25),
|
|
MAX8925_LDO(4, 750, 3900, 50),
|
|
MAX8925_LDO(5, 750, 3900, 50),
|
|
MAX8925_LDO(6, 750, 3900, 50),
|
|
MAX8925_LDO(7, 750, 3900, 50),
|
|
MAX8925_LDO(8, 750, 3900, 50),
|
|
MAX8925_LDO(9, 750, 3900, 50),
|
|
MAX8925_LDO(10, 750, 3900, 50),
|
|
MAX8925_LDO(11, 750, 3900, 50),
|
|
MAX8925_LDO(12, 750, 3900, 50),
|
|
MAX8925_LDO(13, 750, 3900, 50),
|
|
MAX8925_LDO(14, 750, 3900, 50),
|
|
MAX8925_LDO(15, 750, 3900, 50),
|
|
MAX8925_LDO(16, 750, 3900, 50),
|
|
MAX8925_LDO(17, 650, 2250, 25),
|
|
MAX8925_LDO(18, 650, 2250, 25),
|
|
MAX8925_LDO(19, 750, 3900, 50),
|
|
MAX8925_LDO(20, 750, 3900, 50),
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
static int max8925_regulator_dt_init(struct platform_device *pdev,
|
|
struct regulator_config *config,
|
|
int ridx)
|
|
{
|
|
struct device_node *nproot, *np;
|
|
int rcount;
|
|
|
|
nproot = pdev->dev.parent->of_node;
|
|
if (!nproot)
|
|
return -ENODEV;
|
|
np = of_get_child_by_name(nproot, "regulators");
|
|
if (!np) {
|
|
dev_err(&pdev->dev, "failed to find regulators node\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
rcount = of_regulator_match(&pdev->dev, np,
|
|
&max8925_regulator_matches[ridx], 1);
|
|
of_node_put(np);
|
|
if (rcount < 0)
|
|
return rcount;
|
|
config->init_data = max8925_regulator_matches[ridx].init_data;
|
|
config->of_node = max8925_regulator_matches[ridx].of_node;
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define max8925_regulator_dt_init(x, y, z) (-1)
|
|
#endif
|
|
|
|
static int max8925_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
|
|
struct regulator_init_data *pdata = dev_get_platdata(&pdev->dev);
|
|
struct regulator_config config = { };
|
|
struct max8925_regulator_info *ri;
|
|
struct resource *res;
|
|
struct regulator_dev *rdev;
|
|
int i, regulator_idx;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_REG, 0);
|
|
if (!res) {
|
|
dev_err(&pdev->dev, "No REG resource!\n");
|
|
return -EINVAL;
|
|
}
|
|
for (i = 0; i < ARRAY_SIZE(max8925_regulator_info); i++) {
|
|
ri = &max8925_regulator_info[i];
|
|
if (ri->vol_reg == res->start) {
|
|
regulator_idx = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == ARRAY_SIZE(max8925_regulator_info)) {
|
|
dev_err(&pdev->dev, "Failed to find regulator %llu\n",
|
|
(unsigned long long)res->start);
|
|
return -EINVAL;
|
|
}
|
|
ri->i2c = chip->i2c;
|
|
|
|
config.dev = &pdev->dev;
|
|
config.driver_data = ri;
|
|
|
|
if (max8925_regulator_dt_init(pdev, &config, regulator_idx))
|
|
if (pdata)
|
|
config.init_data = pdata;
|
|
|
|
rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&pdev->dev, "failed to register regulator %s\n",
|
|
ri->desc.name);
|
|
return PTR_ERR(rdev);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, rdev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver max8925_regulator_driver = {
|
|
.driver = {
|
|
.name = "max8925-regulator",
|
|
},
|
|
.probe = max8925_regulator_probe,
|
|
};
|
|
|
|
static int __init max8925_regulator_init(void)
|
|
{
|
|
return platform_driver_register(&max8925_regulator_driver);
|
|
}
|
|
subsys_initcall(max8925_regulator_init);
|
|
|
|
static void __exit max8925_regulator_exit(void)
|
|
{
|
|
platform_driver_unregister(&max8925_regulator_driver);
|
|
}
|
|
module_exit(max8925_regulator_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
|
|
MODULE_DESCRIPTION("Regulator Driver for Maxim 8925 PMIC");
|
|
MODULE_ALIAS("platform:max8925-regulator");
|