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 #else 65 #define st_press_acpi_match NULL 66 #endif 67 68 static const struct i2c_device_id st_press_id_table[] = { 69 { LPS001WP_PRESS_DEV_NAME, LPS001WP }, 70 { LPS25H_PRESS_DEV_NAME, LPS25H }, 71 { LPS331AP_PRESS_DEV_NAME, LPS331AP }, 72 { LPS22HB_PRESS_DEV_NAME, LPS22HB }, 73 { LPS33HW_PRESS_DEV_NAME, LPS33HW }, 74 { LPS35HW_PRESS_DEV_NAME, LPS35HW }, 75 { LPS22HH_PRESS_DEV_NAME, LPS22HH }, 76 {}, 77 }; 78 MODULE_DEVICE_TABLE(i2c, st_press_id_table); 79 80 static int st_press_i2c_probe(struct i2c_client *client, 81 const struct i2c_device_id *id) 82 { 83 const struct st_sensor_settings *settings; 84 struct st_sensor_data *press_data; 85 struct iio_dev *indio_dev; 86 int ret; 87 88 if (client->dev.of_node) { 89 st_sensors_of_name_probe(&client->dev, st_press_of_match, 90 client->name, sizeof(client->name)); 91 } else if (ACPI_HANDLE(&client->dev)) { 92 ret = st_sensors_match_acpi_device(&client->dev); 93 if ((ret < 0) || (ret >= ST_PRESS_MAX)) 94 return -ENODEV; 95 96 strlcpy(client->name, st_press_id_table[ret].name, 97 sizeof(client->name)); 98 } else if (!id) 99 return -ENODEV; 100 101 settings = st_press_get_settings(client->name); 102 if (!settings) { 103 dev_err(&client->dev, "device name %s not recognized.\n", 104 client->name); 105 return -ENODEV; 106 } 107 108 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*press_data)); 109 if (!indio_dev) 110 return -ENOMEM; 111 112 press_data = iio_priv(indio_dev); 113 press_data->sensor_settings = (struct st_sensor_settings *)settings; 114 115 ret = st_sensors_i2c_configure(indio_dev, client); 116 if (ret < 0) 117 return ret; 118 119 ret = st_press_common_probe(indio_dev); 120 if (ret < 0) 121 return ret; 122 123 return 0; 124 } 125 126 static int st_press_i2c_remove(struct i2c_client *client) 127 { 128 st_press_common_remove(i2c_get_clientdata(client)); 129 130 return 0; 131 } 132 133 static struct i2c_driver st_press_driver = { 134 .driver = { 135 .name = "st-press-i2c", 136 .of_match_table = of_match_ptr(st_press_of_match), 137 .acpi_match_table = ACPI_PTR(st_press_acpi_match), 138 }, 139 .probe = st_press_i2c_probe, 140 .remove = st_press_i2c_remove, 141 .id_table = st_press_id_table, 142 }; 143 module_i2c_driver(st_press_driver); 144 145 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); 146 MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver"); 147 MODULE_LICENSE("GPL v2"); 148