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); 75