mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 01:31:44 +00:00
a351451acd
The data structure of_match_ptr() protects is always compiled in. Hence of_match_ptr() is not needed. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
270 lines
6.5 KiB
C
270 lines
6.5 KiB
C
/*
|
|
* tps65217.c
|
|
*
|
|
* TPS65217 chip family multi-function driver
|
|
*
|
|
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.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 version 2.
|
|
*
|
|
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
|
* kind, whether express or implied; without even the implied warranty
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/init.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/err.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
|
|
#include <linux/mfd/core.h>
|
|
#include <linux/mfd/tps65217.h>
|
|
|
|
static struct mfd_cell tps65217s[] = {
|
|
{
|
|
.name = "tps65217-pmic",
|
|
},
|
|
{
|
|
.name = "tps65217-bl",
|
|
},
|
|
};
|
|
|
|
/**
|
|
* tps65217_reg_read: Read a single tps65217 register.
|
|
*
|
|
* @tps: Device to read from.
|
|
* @reg: Register to read.
|
|
* @val: Contians the value
|
|
*/
|
|
int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,
|
|
unsigned int *val)
|
|
{
|
|
return regmap_read(tps->regmap, reg, val);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65217_reg_read);
|
|
|
|
/**
|
|
* tps65217_reg_write: Write a single tps65217 register.
|
|
*
|
|
* @tps65217: Device to write to.
|
|
* @reg: Register to write to.
|
|
* @val: Value to write.
|
|
* @level: Password protected level
|
|
*/
|
|
int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,
|
|
unsigned int val, unsigned int level)
|
|
{
|
|
int ret;
|
|
unsigned int xor_reg_val;
|
|
|
|
switch (level) {
|
|
case TPS65217_PROTECT_NONE:
|
|
return regmap_write(tps->regmap, reg, val);
|
|
case TPS65217_PROTECT_L1:
|
|
xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
|
|
ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
|
|
xor_reg_val);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return regmap_write(tps->regmap, reg, val);
|
|
case TPS65217_PROTECT_L2:
|
|
xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;
|
|
ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
|
|
xor_reg_val);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = regmap_write(tps->regmap, reg, val);
|
|
if (ret < 0)
|
|
return ret;
|
|
ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,
|
|
xor_reg_val);
|
|
if (ret < 0)
|
|
return ret;
|
|
return regmap_write(tps->regmap, reg, val);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65217_reg_write);
|
|
|
|
/**
|
|
* tps65217_update_bits: Modify bits w.r.t mask, val and level.
|
|
*
|
|
* @tps65217: Device to write to.
|
|
* @reg: Register to read-write to.
|
|
* @mask: Mask.
|
|
* @val: Value to write.
|
|
* @level: Password protected level
|
|
*/
|
|
static int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,
|
|
unsigned int mask, unsigned int val, unsigned int level)
|
|
{
|
|
int ret;
|
|
unsigned int data;
|
|
|
|
ret = tps65217_reg_read(tps, reg, &data);
|
|
if (ret) {
|
|
dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);
|
|
return ret;
|
|
}
|
|
|
|
data &= ~mask;
|
|
data |= val & mask;
|
|
|
|
ret = tps65217_reg_write(tps, reg, data, level);
|
|
if (ret)
|
|
dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,
|
|
unsigned int mask, unsigned int val, unsigned int level)
|
|
{
|
|
return tps65217_update_bits(tps, reg, mask, val, level);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65217_set_bits);
|
|
|
|
int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,
|
|
unsigned int mask, unsigned int level)
|
|
{
|
|
return tps65217_update_bits(tps, reg, mask, 0, level);
|
|
}
|
|
EXPORT_SYMBOL_GPL(tps65217_clear_bits);
|
|
|
|
static struct regmap_config tps65217_regmap_config = {
|
|
.reg_bits = 8,
|
|
.val_bits = 8,
|
|
};
|
|
|
|
static const struct of_device_id tps65217_of_match[] = {
|
|
{ .compatible = "ti,tps65217", .data = (void *)TPS65217 },
|
|
{ /* sentinel */ },
|
|
};
|
|
|
|
static int tps65217_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *ids)
|
|
{
|
|
struct tps65217 *tps;
|
|
unsigned int version;
|
|
unsigned int chip_id = ids->driver_data;
|
|
const struct of_device_id *match;
|
|
bool status_off = false;
|
|
int ret;
|
|
|
|
if (client->dev.of_node) {
|
|
match = of_match_device(tps65217_of_match, &client->dev);
|
|
if (!match) {
|
|
dev_err(&client->dev,
|
|
"Failed to find matching dt id\n");
|
|
return -EINVAL;
|
|
}
|
|
chip_id = (unsigned int)match->data;
|
|
status_off = of_property_read_bool(client->dev.of_node,
|
|
"ti,pmic-shutdown-controller");
|
|
}
|
|
|
|
if (!chip_id) {
|
|
dev_err(&client->dev, "id is null.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
|
|
if (!tps)
|
|
return -ENOMEM;
|
|
|
|
i2c_set_clientdata(client, tps);
|
|
tps->dev = &client->dev;
|
|
tps->id = chip_id;
|
|
|
|
tps->regmap = devm_regmap_init_i2c(client, &tps65217_regmap_config);
|
|
if (IS_ERR(tps->regmap)) {
|
|
ret = PTR_ERR(tps->regmap);
|
|
dev_err(tps->dev, "Failed to allocate register map: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = mfd_add_devices(tps->dev, -1, tps65217s,
|
|
ARRAY_SIZE(tps65217s), NULL, 0, NULL);
|
|
if (ret < 0) {
|
|
dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);
|
|
if (ret < 0) {
|
|
dev_err(tps->dev, "Failed to read revision register: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
/* Set the PMIC to shutdown on PWR_EN toggle */
|
|
if (status_off) {
|
|
ret = tps65217_set_bits(tps, TPS65217_REG_STATUS,
|
|
TPS65217_STATUS_OFF, TPS65217_STATUS_OFF,
|
|
TPS65217_PROTECT_NONE);
|
|
if (ret)
|
|
dev_warn(tps->dev, "unable to set the status OFF\n");
|
|
}
|
|
|
|
dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",
|
|
(version & TPS65217_CHIPID_CHIP_MASK) >> 4,
|
|
version & TPS65217_CHIPID_REV_MASK);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tps65217_remove(struct i2c_client *client)
|
|
{
|
|
struct tps65217 *tps = i2c_get_clientdata(client);
|
|
|
|
mfd_remove_devices(tps->dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id tps65217_id_table[] = {
|
|
{"tps65217", TPS65217},
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tps65217_id_table);
|
|
|
|
static struct i2c_driver tps65217_driver = {
|
|
.driver = {
|
|
.name = "tps65217",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = tps65217_of_match,
|
|
},
|
|
.id_table = tps65217_id_table,
|
|
.probe = tps65217_probe,
|
|
.remove = tps65217_remove,
|
|
};
|
|
|
|
static int __init tps65217_init(void)
|
|
{
|
|
return i2c_add_driver(&tps65217_driver);
|
|
}
|
|
subsys_initcall(tps65217_init);
|
|
|
|
static void __exit tps65217_exit(void)
|
|
{
|
|
i2c_del_driver(&tps65217_driver);
|
|
}
|
|
module_exit(tps65217_exit);
|
|
|
|
MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
|
|
MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");
|
|
MODULE_LICENSE("GPL v2");
|