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// SPDX-License-Identifier: GPL-2.0-only
/*
* ST Microelectronics MFD: stmpe's i2c client specific driver
*
* Copyright (C) ST-Ericsson SA 2010
* Copyright (C) ST Microelectronics SA 2011
*
* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
* Author: Viresh Kumar <vireshk@kernel.org> for ST Microelectronics
*/
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/of_device.h>
#include "stmpe.h"
static int i2c_reg_read(struct stmpe *stmpe, u8 reg)
{
struct i2c_client *i2c = stmpe->client;
return i2c_smbus_read_byte_data(i2c, reg);
}
static int i2c_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
{
struct i2c_client *i2c = stmpe->client;
return i2c_smbus_write_byte_data(i2c, reg, val);
}
static int i2c_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
{
struct i2c_client *i2c = stmpe->client;
return i2c_smbus_read_i2c_block_data(i2c, reg, length, values);
}
static int i2c_block_write(struct stmpe *stmpe, u8 reg, u8 length,
const u8 *values)
{
struct i2c_client *i2c = stmpe->client;
return i2c_smbus_write_i2c_block_data(i2c, reg, length, values);
}
static struct stmpe_client_info i2c_ci = {
.read_byte = i2c_reg_read,
.write_byte = i2c_reg_write,
.read_block = i2c_block_read,
.write_block = i2c_block_write,
};
static const struct of_device_id stmpe_of_match[] = {
{ .compatible = "st,stmpe610", .data = (void *)STMPE610, },
{ .compatible = "st,stmpe801", .data = (void *)STMPE801, },
{ .compatible = "st,stmpe811", .data = (void *)STMPE811, },
{ .compatible = "st,stmpe1600", .data = (void *)STMPE1600, },
{ .compatible = "st,stmpe1601", .data = (void *)STMPE1601, },
{ .compatible = "st,stmpe1801", .data = (void *)STMPE1801, },
{ .compatible = "st,stmpe2401", .data = (void *)STMPE2401, },
{ .compatible = "st,stmpe2403", .data = (void *)STMPE2403, },
{},
};
MODULE_DEVICE_TABLE(of, stmpe_of_match);
static int
stmpe_i2c_probe(struct i2c_client *i2c)
{
const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
enum stmpe_partnum partnum;
const struct of_device_id *of_id;
i2c_ci.data = (void *)id;
i2c_ci.irq = i2c->irq;
i2c_ci.client = i2c;
i2c_ci.dev = &i2c->dev;
of_id = of_match_device(stmpe_of_match, &i2c->dev);
if (!of_id) {
/*
* This happens when the I2C ID matches the node name
* but no real compatible string has been given.
*/
dev_info(&i2c->dev, "matching on node name, compatible is preferred\n");
partnum = id->driver_data;
} else
partnum = (enum stmpe_partnum)of_id->data;
return stmpe_probe(&i2c_ci, partnum);
}
static void stmpe_i2c_remove(struct i2c_client *i2c)
{
struct stmpe *stmpe = dev_get_drvdata(&i2c->dev);
stmpe_remove(stmpe);
}
static const struct i2c_device_id stmpe_i2c_id[] = {
{ "stmpe610", STMPE610 },
{ "stmpe801", STMPE801 },
{ "stmpe811", STMPE811 },
{ "stmpe1600", STMPE1600 },
{ "stmpe1601", STMPE1601 },
{ "stmpe1801", STMPE1801 },
{ "stmpe2401", STMPE2401 },
{ "stmpe2403", STMPE2403 },
{ }
};
MODULE_DEVICE_TABLE(i2c, stmpe_i2c_id);
static struct i2c_driver stmpe_i2c_driver = {
.driver = {
.name = "stmpe-i2c",
.pm = pm_sleep_ptr(&stmpe_dev_pm_ops),
.of_match_table = stmpe_of_match,
},
.probe_new = stmpe_i2c_probe,
.remove = stmpe_i2c_remove,
.id_table = stmpe_i2c_id,
};
static int __init stmpe_init(void)
{
return i2c_add_driver(&stmpe_i2c_driver);
}
subsys_initcall(stmpe_init);
static void __exit stmpe_exit(void)
{
i2c_del_driver(&stmpe_i2c_driver);
}
module_exit(stmpe_exit);
MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver");
MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");
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