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89 lines
2.3 KiB
89 lines
2.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Murata ZPA2326 I2C pressure and temperature sensor driver |
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* |
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* Copyright (c) 2016 Parrot S.A. |
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* |
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* Author: Gregor Boirie <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/regmap.h> |
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#include <linux/i2c.h> |
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#include <linux/mod_devicetable.h> |
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#include "zpa2326.h" |
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/* |
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* read_flag_mask: |
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* - address bit 7 must be set to request a register read operation |
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*/ |
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static const struct regmap_config zpa2326_regmap_i2c_config = { |
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.reg_bits = 8, |
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.val_bits = 8, |
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.writeable_reg = zpa2326_isreg_writeable, |
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.readable_reg = zpa2326_isreg_readable, |
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.precious_reg = zpa2326_isreg_precious, |
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.max_register = ZPA2326_TEMP_OUT_H_REG, |
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.read_flag_mask = BIT(7), |
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.cache_type = REGCACHE_NONE, |
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}; |
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static unsigned int zpa2326_i2c_hwid(const struct i2c_client *client) |
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{ |
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#define ZPA2326_SA0(_addr) (_addr & BIT(0)) |
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#define ZPA2326_DEVICE_ID_SA0_SHIFT (1) |
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/* Identification register bit 1 mirrors device address bit 0. */ |
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return (ZPA2326_DEVICE_ID | |
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(ZPA2326_SA0(client->addr) << ZPA2326_DEVICE_ID_SA0_SHIFT)); |
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} |
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static int zpa2326_probe_i2c(struct i2c_client *client, |
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const struct i2c_device_id *i2c_id) |
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{ |
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struct regmap *regmap; |
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regmap = devm_regmap_init_i2c(client, &zpa2326_regmap_i2c_config); |
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if (IS_ERR(regmap)) { |
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dev_err(&client->dev, "failed to init registers map"); |
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return PTR_ERR(regmap); |
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} |
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return zpa2326_probe(&client->dev, i2c_id->name, client->irq, |
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zpa2326_i2c_hwid(client), regmap); |
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} |
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static int zpa2326_remove_i2c(struct i2c_client *client) |
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{ |
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zpa2326_remove(&client->dev); |
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return 0; |
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} |
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static const struct i2c_device_id zpa2326_i2c_ids[] = { |
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{ "zpa2326", 0 }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(i2c, zpa2326_i2c_ids); |
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static const struct of_device_id zpa2326_i2c_matches[] = { |
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{ .compatible = "murata,zpa2326" }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, zpa2326_i2c_matches); |
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static struct i2c_driver zpa2326_i2c_driver = { |
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.driver = { |
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.name = "zpa2326-i2c", |
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.of_match_table = zpa2326_i2c_matches, |
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.pm = ZPA2326_PM_OPS, |
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}, |
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.probe = zpa2326_probe_i2c, |
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.remove = zpa2326_remove_i2c, |
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.id_table = zpa2326_i2c_ids, |
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}; |
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module_i2c_driver(zpa2326_i2c_driver); |
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MODULE_AUTHOR("Gregor Boirie <[email protected]>"); |
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MODULE_DESCRIPTION("I2C driver for Murata ZPA2326 pressure sensor"); |
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MODULE_LICENSE("GPL v2");
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