drivers/iio/pressure/hsc030pa_i2c.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Honeywell TruStability HSC Series pressure/temperature sensor
   4  *
   5  * Copyright (c) 2023 Petre Rodan <petre.rodan@subdimension.ro>
   6  *
   7  * Datasheet: https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/board-mount-pressure-sensors/common/documents/sps-siot-i2c-comms-digital-output-pressure-sensors-tn-008201-3-en-ciid-45841.pdf
   8  * Datasheet: https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/common/documents/sps-siot-sleep-mode-technical-note-008286-1-en-ciid-155793.pdf
   9  */
  10
  11 #include <linux/delay.h>
  12 #include <linux/device.h>
  13 #include <linux/errno.h>
  14 #include <linux/i2c.h>
  15 #include <linux/mod_devicetable.h>
  16 #include <linux/module.h>
  17 #include <linux/types.h>
  18
  19 #include <linux/iio/iio.h>
  20
  21 #include "hsc030pa.h"
  22
  23 static int hsc_i2c_recv(struct hsc_data *data)
  24 {
  25         struct i2c_client *client = to_i2c_client(data->dev);
  26         struct i2c_msg msg;
  27         int ret;
  28
  29         msleep_interruptible(HSC_RESP_TIME_MS);
  30
  31         msg.addr = client->addr;
  32         msg.flags = client->flags | I2C_M_RD;
  33         msg.len = HSC_REG_MEASUREMENT_RD_SIZE;
  34         msg.buf = data->buffer;
  35
  36         ret = i2c_transfer(client->adapter, &msg, 1);
  37
  38         return (ret == 2) ? 0 : ret;
  39 }
  40
  41 static int hsc_i2c_probe(struct i2c_client *client)
  42 {
  43         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
  44                 return -EOPNOTSUPP;
  45
  46         return hsc_common_probe(&client->dev, hsc_i2c_recv);
  47 }
  48
  49 static const struct of_device_id hsc_i2c_match[] = {
  50         { .compatible = "honeywell,hsc030pa" },
  51         {}
  52 };
  53 MODULE_DEVICE_TABLE(of, hsc_i2c_match);
  54
  55 static const struct i2c_device_id hsc_i2c_id[] = {
  56         { "hsc030pa" },
  57         {}
  58 };
  59 MODULE_DEVICE_TABLE(i2c, hsc_i2c_id);
  60
  61 static struct i2c_driver hsc_i2c_driver = {
  62         .driver = {
  63                 .name = "hsc030pa",
  64                 .of_match_table = hsc_i2c_match,
  65         },
  66         .probe = hsc_i2c_probe,
  67         .id_table = hsc_i2c_id,
  68 };
  69 module_i2c_driver(hsc_i2c_driver);
  70
  71 MODULE_AUTHOR("Petre Rodan <petre.rodan@subdimension.ro>");
  72 MODULE_DESCRIPTION("Honeywell HSC and SSC pressure sensor i2c driver");
  73 MODULE_LICENSE("GPL");
  74 MODULE_IMPORT_NS("IIO_HONEYWELL_HSC030PA");