1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * STMicroelectronics pressures driver 4 * 5 * Copyright 2013 STMicroelectronics Inc. 6 * 7 * Denis Ciocca <denis.ciocca@st.com> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/slab.h> 13 #include <linux/acpi.h> 14 #include <linux/i2c.h> 15 #include <linux/iio/iio.h> 16 17 #include <linux/iio/common/st_sensors.h> 18 #include <linux/iio/common/st_sensors_i2c.h> 19 #include "st_pressure.h" 20 21 #ifdef CONFIG_OF 22 static const struct of_device_id st_press_of_match[] = { 23 { 24 .compatible = "st,lps001wp-press", 25 .data = LPS001WP_PRESS_DEV_NAME, 26 }, 27 { 28 .compatible = "st,lps25h-press", 29 .data = LPS25H_PRESS_DEV_NAME, 30 }, 31 { 32 .compatible = "st,lps331ap-press", 33 .data = LPS331AP_PRESS_DEV_NAME, 34 }, 35 { 36 .compatible = "st,lps22hb-press", 37 .data = LPS22HB_PRESS_DEV_NAME, 38 }, 39 { 40 .compatible = "st,lps33hw", 41 .data = LPS33HW_PRESS_DEV_NAME, 42 }, 43 { 44 .compatible = "st,lps35hw", 45 .data = LPS35HW_PRESS_DEV_NAME, 46 }, 47 { 48 .compatible = "st,lps22hh", 49 .data = LPS22HH_PRESS_DEV_NAME, 50 }, 51 {}, 52 }; 53 MODULE_DEVICE_TABLE(of, st_press_of_match); 54 #else 55 #define st_press_of_match NULL 56 #endif 57 58 #ifdef CONFIG_ACPI 59 static const struct acpi_device_id st_press_acpi_match[] = { 60 {"SNO9210", LPS22HB}, 61 { }, 62 }; 63 MODULE_DEVICE_TABLE(acpi, st_press_acpi_match); 64 #endif 65 66 static const struct i2c_device_id st_press_id_table[] = { 67 { LPS001WP_PRESS_DEV_NAME, LPS001WP }, 68 { LPS25H_PRESS_DEV_NAME, LPS25H }, 69 { LPS331AP_PRESS_DEV_NAME, LPS331AP }, 70 { LPS22HB_PRESS_DEV_NAME, LPS22HB }, 71 { LPS33HW_PRESS_DEV_NAME, LPS33HW }, 72 { LPS35HW_PRESS_DEV_NAME, LPS35HW }, 73 { LPS22HH_PRESS_DEV_NAME, LPS22HH }, 74 {}, 75 }; 76 MODULE_DEVICE_TABLE(i2c, st_press_id_table); 77 78 static int st_press_i2c_probe(struct i2c_client *client, 79 const struct i2c_device_id *id) 80 { 81 const struct st_sensor_settings *settings; 82 struct st_sensor_data *press_data; 83 struct iio_dev *indio_dev; 84 int ret; 85 86 if (client->dev.of_node) { 87 st_sensors_of_name_probe(&client->dev, st_press_of_match, 88 client->name, sizeof(client->name)); 89 } else if (ACPI_HANDLE(&client->dev)) { 90 ret = st_sensors_match_acpi_device(&client->dev); 91 if ((ret < 0) || (ret >= ST_PRESS_MAX)) 92 return -ENODEV; 93 94 strlcpy(client->name, st_press_id_table[ret].name, 95 sizeof(client->name)); 96 } else if (!id) 97 return -ENODEV; 98 99 settings = st_press_get_settings(client->name); 100 if (!settings) { 101 dev_err(&client->dev, "device name %s not recognized.\n", 102 client->name); 103 return -ENODEV; 104 } 105 106 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data)); 107 if (!indio_dev) 108 return -ENOMEM; 109 110 press_data = iio_priv(indio_dev); 111 press_data->sensor_settings = (struct st_sensor_settings *)settings; 112 113 ret = st_sensors_i2c_configure(indio_dev, client); 114 if (ret < 0) 115 return ret; 116 117 ret = st_press_common_probe(indio_dev); 118 if (ret < 0) 119 return ret; 120 121 return 0; 122 } 123 124 static int st_press_i2c_remove(struct i2c_client *client) 125 { 126 st_press_common_remove(i2c_get_clientdata(client)); 127 128 return 0; 129 } 130 131 static struct i2c_driver st_press_driver = { 132 .driver = { 133 .name = "st-press-i2c", 134 .of_match_table = of_match_ptr(st_press_of_match), 135 .acpi_match_table = ACPI_PTR(st_press_acpi_match), 136 }, 137 .probe = st_press_i2c_probe, 138 .remove = st_press_i2c_remove, 139 .id_table = st_press_id_table, 140 }; 141 module_i2c_driver(st_press_driver); 142 143 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); 144 MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver"); 145 MODULE_LICENSE("GPL v2"); 146