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6bb9f0d933
STMPE1600 is a 16-bit port expander. Datasheet is available here : http://www2.st.com/content/st_com/en/products/interfaces-and-transceivers/ i-o-expanders-and-level-translators/i-o-expanders/stmpe1600.html Signed-off-by: Amelie DELAUNAY <amelie.delaunay@st.com> Signed-off-by: Patrice Chotard <patrice.chotard@st.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
142 lines
3.6 KiB
C
142 lines
3.6 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 <vireshk@kernel.org> 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 <linux/of_device.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 const struct of_device_id stmpe_of_match[] = {
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{ .compatible = "st,stmpe610", .data = (void *)STMPE610, },
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{ .compatible = "st,stmpe801", .data = (void *)STMPE801, },
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{ .compatible = "st,stmpe811", .data = (void *)STMPE811, },
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{ .compatible = "st,stmpe1600", .data = (void *)STMPE1600, },
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{ .compatible = "st,stmpe1601", .data = (void *)STMPE1601, },
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{ .compatible = "st,stmpe1801", .data = (void *)STMPE1801, },
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{ .compatible = "st,stmpe2401", .data = (void *)STMPE2401, },
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{ .compatible = "st,stmpe2403", .data = (void *)STMPE2403, },
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{},
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};
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MODULE_DEVICE_TABLE(of, stmpe_of_match);
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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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enum stmpe_partnum partnum;
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const struct of_device_id *of_id;
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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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of_id = of_match_device(stmpe_of_match, &i2c->dev);
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if (!of_id) {
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/*
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* This happens when the I2C ID matches the node name
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* but no real compatible string has been given.
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*/
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dev_info(&i2c->dev, "matching on node name, compatible is preferred\n");
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partnum = id->driver_data;
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} else
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partnum = (enum stmpe_partnum)of_id->data;
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return stmpe_probe(&i2c_ci, partnum);
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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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{ "stmpe1600", STMPE1600 },
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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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#ifdef CONFIG_PM
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.pm = &stmpe_dev_pm_ops,
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#endif
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.of_match_table = stmpe_of_match,
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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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