230f13a503
Provides support for 1801 variant of stmpe gpio port expanders. This chip has 18 gpios configurable as GPI, GPO, keypad matrix, special key or dedicated key function. Note that special/dedicated key function is not supported yet. Signed-off-by: Jean-Nicolas Graux <jean-nicolas.graux@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
/*
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* ST Microelectronics MFD: stmpe's i2c client specific driver
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*
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* Copyright (C) ST-Ericsson SA 2010
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* Copyright (C) ST Microelectronics SA 2011
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*
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* License Terms: GNU General Public License, version 2
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* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
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* Author: Viresh Kumar <viresh.linux@gmail.com> for ST Microelectronics
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*/
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include "stmpe.h"
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static int i2c_reg_read(struct stmpe *stmpe, u8 reg)
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{
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struct i2c_client *i2c = stmpe->client;
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return i2c_smbus_read_byte_data(i2c, reg);
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}
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static int i2c_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
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{
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struct i2c_client *i2c = stmpe->client;
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return i2c_smbus_write_byte_data(i2c, reg, val);
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}
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static int i2c_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
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{
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struct i2c_client *i2c = stmpe->client;
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return i2c_smbus_read_i2c_block_data(i2c, reg, length, values);
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}
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static int i2c_block_write(struct stmpe *stmpe, u8 reg, u8 length,
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const u8 *values)
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{
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struct i2c_client *i2c = stmpe->client;
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return i2c_smbus_write_i2c_block_data(i2c, reg, length, values);
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}
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static struct stmpe_client_info i2c_ci = {
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.read_byte = i2c_reg_read,
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.write_byte = i2c_reg_write,
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.read_block = i2c_block_read,
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.write_block = i2c_block_write,
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};
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static int
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stmpe_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
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{
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i2c_ci.data = (void *)id;
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i2c_ci.irq = i2c->irq;
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i2c_ci.client = i2c;
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i2c_ci.dev = &i2c->dev;
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return stmpe_probe(&i2c_ci, id->driver_data);
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}
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static int stmpe_i2c_remove(struct i2c_client *i2c)
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{
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struct stmpe *stmpe = dev_get_drvdata(&i2c->dev);
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return stmpe_remove(stmpe);
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}
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static const struct i2c_device_id stmpe_i2c_id[] = {
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{ "stmpe610", STMPE610 },
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{ "stmpe801", STMPE801 },
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{ "stmpe811", STMPE811 },
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{ "stmpe1601", STMPE1601 },
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{ "stmpe1801", STMPE1801 },
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{ "stmpe2401", STMPE2401 },
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{ "stmpe2403", STMPE2403 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, stmpe_id);
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static struct i2c_driver stmpe_i2c_driver = {
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.driver = {
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.name = "stmpe-i2c",
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.owner = THIS_MODULE,
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#ifdef CONFIG_PM
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.pm = &stmpe_dev_pm_ops,
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#endif
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},
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.probe = stmpe_i2c_probe,
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.remove = stmpe_i2c_remove,
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.id_table = stmpe_i2c_id,
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};
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static int __init stmpe_init(void)
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{
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return i2c_add_driver(&stmpe_i2c_driver);
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}
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subsys_initcall(stmpe_init);
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static void __exit stmpe_exit(void)
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{
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i2c_del_driver(&stmpe_i2c_driver);
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}
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module_exit(stmpe_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("STMPE MFD I2C Interface Driver");
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MODULE_AUTHOR("Rabin Vincent <rabin.vincent@stericsson.com>");
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