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