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d6f0c3d3a8
The PTR_ERR_OR_ZERO() helper function checks if a pointer contains an errno code and returns it or return 0 if that's not the case. Use the helper instead of open coding the same logic in the driver. This was found with make coccicheck that complains with the following warning: drivers/input/touchscreen/cyttsp4_i2c.c:53:1-3: WARNING: PTR_ERR_OR_ZERO can be used Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/*
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* cyttsp_i2c.c
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* Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
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* For use with Cypress Txx4xx parts.
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* Supported parts include:
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* TMA4XX
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* TMA1036
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*
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* Copyright (C) 2009, 2010, 2011 Cypress Semiconductor, Inc.
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* Copyright (C) 2012 Javier Martinez Canillas <javier@dowhile0.org>
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* Copyright (C) 2013 Cypress Semiconductor
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2, and only version 2, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* Contact Cypress Semiconductor at www.cypress.com <ttdrivers@cypress.com>
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*
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*/
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#include "cyttsp4_core.h"
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#include <linux/i2c.h>
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#include <linux/input.h>
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#define CYTTSP4_I2C_DATA_SIZE (3 * 256)
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static const struct cyttsp4_bus_ops cyttsp4_i2c_bus_ops = {
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.bustype = BUS_I2C,
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.write = cyttsp_i2c_write_block_data,
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.read = cyttsp_i2c_read_block_data,
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};
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static int cyttsp4_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct cyttsp4 *ts;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
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dev_err(&client->dev, "I2C functionality not Supported\n");
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return -EIO;
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}
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ts = cyttsp4_probe(&cyttsp4_i2c_bus_ops, &client->dev, client->irq,
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CYTTSP4_I2C_DATA_SIZE);
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return PTR_ERR_OR_ZERO(ts);
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}
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static int cyttsp4_i2c_remove(struct i2c_client *client)
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{
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struct cyttsp4 *ts = i2c_get_clientdata(client);
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cyttsp4_remove(ts);
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return 0;
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}
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static const struct i2c_device_id cyttsp4_i2c_id[] = {
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{ CYTTSP4_I2C_NAME, 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);
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static struct i2c_driver cyttsp4_i2c_driver = {
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.driver = {
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.name = CYTTSP4_I2C_NAME,
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.pm = &cyttsp4_pm_ops,
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},
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.probe = cyttsp4_i2c_probe,
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.remove = cyttsp4_i2c_remove,
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.id_table = cyttsp4_i2c_id,
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};
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module_i2c_driver(cyttsp4_i2c_driver);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
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MODULE_AUTHOR("Cypress");
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