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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Murata ZPA2326 I2C pressure and temperature sensor driver4 *5 * Copyright (c) 2016 Parrot S.A.6 *7 * Author: Gregor Boirie <gregor.boirie@parrot.com>8 */9 10#include <linux/module.h>11#include <linux/regmap.h>12#include <linux/i2c.h>13#include <linux/mod_devicetable.h>14#include "zpa2326.h"15 16/*17 * read_flag_mask:18 * - address bit 7 must be set to request a register read operation19 */20static const struct regmap_config zpa2326_regmap_i2c_config = {21 .reg_bits = 8,22 .val_bits = 8,23 .writeable_reg = zpa2326_isreg_writeable,24 .readable_reg = zpa2326_isreg_readable,25 .precious_reg = zpa2326_isreg_precious,26 .max_register = ZPA2326_TEMP_OUT_H_REG,27 .read_flag_mask = BIT(7),28 .cache_type = REGCACHE_NONE,29};30 31static unsigned int zpa2326_i2c_hwid(const struct i2c_client *client)32{33#define ZPA2326_SA0(_addr) (_addr & BIT(0))34#define ZPA2326_DEVICE_ID_SA0_SHIFT (1)35 36 /* Identification register bit 1 mirrors device address bit 0. */37 return (ZPA2326_DEVICE_ID |38 (ZPA2326_SA0(client->addr) << ZPA2326_DEVICE_ID_SA0_SHIFT));39}40 41static int zpa2326_probe_i2c(struct i2c_client *client)42{43 const struct i2c_device_id *i2c_id = i2c_client_get_device_id(client);44 struct regmap *regmap;45 46 regmap = devm_regmap_init_i2c(client, &zpa2326_regmap_i2c_config);47 if (IS_ERR(regmap)) {48 dev_err(&client->dev, "failed to init registers map");49 return PTR_ERR(regmap);50 }51 52 return zpa2326_probe(&client->dev, i2c_id->name, client->irq,53 zpa2326_i2c_hwid(client), regmap);54}55 56static void zpa2326_remove_i2c(struct i2c_client *client)57{58 zpa2326_remove(&client->dev);59}60 61static const struct i2c_device_id zpa2326_i2c_ids[] = {62 { "zpa2326" },63 { }64};65MODULE_DEVICE_TABLE(i2c, zpa2326_i2c_ids);66 67static const struct of_device_id zpa2326_i2c_matches[] = {68 { .compatible = "murata,zpa2326" },69 { }70};71MODULE_DEVICE_TABLE(of, zpa2326_i2c_matches);72 73static struct i2c_driver zpa2326_i2c_driver = {74 .driver = {75 .name = "zpa2326-i2c",76 .of_match_table = zpa2326_i2c_matches,77 .pm = ZPA2326_PM_OPS,78 },79 .probe = zpa2326_probe_i2c,80 .remove = zpa2326_remove_i2c,81 .id_table = zpa2326_i2c_ids,82};83module_i2c_driver(zpa2326_i2c_driver);84 85MODULE_AUTHOR("Gregor Boirie <gregor.boirie@parrot.com>");86MODULE_DESCRIPTION("I2C driver for Murata ZPA2326 pressure sensor");87MODULE_LICENSE("GPL v2");88MODULE_IMPORT_NS(IIO_ZPA2326);89