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ed5c2f5fd1
The value returned by an i2c driver's remove function is mostly ignored. (Only an error message is printed if the value is non-zero that the error is ignored.) So change the prototype of the remove function to return no value. This way driver authors are not tempted to assume that passing an error to the upper layer is a good idea. All drivers are adapted accordingly. There is no intended change of behaviour, all callbacks were prepared to return 0 before. Reviewed-by: Peter Senna Tschudin <peter.senna@gmail.com> Reviewed-by: Jeremy Kerr <jk@codeconstruct.com.au> Reviewed-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Crt Mori <cmo@melexis.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Marek Behún <kabel@kernel.org> # for leds-turris-omnia Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Petr Machata <petrm@nvidia.com> # for mlxsw Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> # for surface3_power Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> # for bmc150-accel-i2c + kxcjk-1013 Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> # for media/* + staging/media/* Acked-by: Miguel Ojeda <ojeda@kernel.org> # for auxdisplay/ht16k33 + auxdisplay/lcd2s Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # for versaclock5 Reviewed-by: Ajay Gupta <ajayg@nvidia.com> # for ucsi_ccg Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for iio Acked-by: Peter Rosin <peda@axentia.se> # for i2c-mux-*, max9860 Acked-by: Adrien Grassein <adrien.grassein@gmail.com> # for lontium-lt8912b Reviewed-by: Jean Delvare <jdelvare@suse.de> # for hwmon, i2c-core and i2c/muxes Acked-by: Corey Minyard <cminyard@mvista.com> # for IPMI Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> # for drivers/power Acked-by: Krzysztof Hałasa <khalasa@piap.pl> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
85 lines
1.8 KiB
C
85 lines
1.8 KiB
C
// 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 void max7300_remove(struct i2c_client *client)
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{
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__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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