| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2009 Wolfram Sang, Pengutronix |
| * |
| * Check max730x.c for further details. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/platform_device.h> |
| #include <linux/mutex.h> |
| #include <linux/i2c.h> |
| #include <linux/spi/max7301.h> |
| #include <linux/slab.h> |
| |
| static int max7300_i2c_write(struct device *dev, unsigned int reg, |
| unsigned int val) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| |
| return i2c_smbus_write_byte_data(client, reg, val); |
| } |
| |
| static int max7300_i2c_read(struct device *dev, unsigned int reg) |
| { |
| struct i2c_client *client = to_i2c_client(dev); |
| |
| return i2c_smbus_read_byte_data(client, reg); |
| } |
| |
| static int max7300_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| struct max7301 *ts; |
| |
| if (!i2c_check_functionality(client->adapter, |
| I2C_FUNC_SMBUS_BYTE_DATA)) |
| return -EIO; |
| |
| ts = devm_kzalloc(&client->dev, sizeof(struct max7301), GFP_KERNEL); |
| if (!ts) |
| return -ENOMEM; |
| |
| ts->read = max7300_i2c_read; |
| ts->write = max7300_i2c_write; |
| ts->dev = &client->dev; |
| |
| return __max730x_probe(ts); |
| } |
| |
| static int max7300_remove(struct i2c_client *client) |
| { |
| return __max730x_remove(&client->dev); |
| } |
| |
| static const struct i2c_device_id max7300_id[] = { |
| { "max7300", 0 }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(i2c, max7300_id); |
| |
| static struct i2c_driver max7300_driver = { |
| .driver = { |
| .name = "max7300", |
| }, |
| .probe = max7300_probe, |
| .remove = max7300_remove, |
| .id_table = max7300_id, |
| }; |
| |
| static int __init max7300_init(void) |
| { |
| return i2c_add_driver(&max7300_driver); |
| } |
| subsys_initcall(max7300_init); |
| |
| static void __exit max7300_exit(void) |
| { |
| i2c_del_driver(&max7300_driver); |
| } |
| module_exit(max7300_exit); |
| |
| MODULE_AUTHOR("Wolfram Sang"); |
| MODULE_LICENSE("GPL v2"); |
| MODULE_DESCRIPTION("MAX7300 GPIO-Expander"); |