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