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/spi/spi.h> 14 #include <linux/iio/iio.h> 15 16 #include <linux/iio/common/st_sensors.h> 17 #include <linux/iio/common/st_sensors_spi.h> 18 #include "st_pressure.h" 19 20 #ifdef CONFIG_OF 21 /* 22 * For new single-chip sensors use <device_name> as compatible string. 23 * For old single-chip devices keep <device_name>-press to maintain 24 * compatibility 25 */ 26 static const struct of_device_id st_press_of_match[] = { 27 { 28 .compatible = "st,lps001wp-press", 29 .data = LPS001WP_PRESS_DEV_NAME, 30 }, 31 { 32 .compatible = "st,lps25h-press", 33 .data = LPS25H_PRESS_DEV_NAME, 34 }, 35 { 36 .compatible = "st,lps331ap-press", 37 .data = LPS331AP_PRESS_DEV_NAME, 38 }, 39 { 40 .compatible = "st,lps22hb-press", 41 .data = LPS22HB_PRESS_DEV_NAME, 42 }, 43 { 44 .compatible = "st,lps33hw", 45 .data = LPS33HW_PRESS_DEV_NAME, 46 }, 47 { 48 .compatible = "st,lps35hw", 49 .data = LPS35HW_PRESS_DEV_NAME, 50 }, 51 { 52 .compatible = "st,lps22hh", 53 .data = LPS22HH_PRESS_DEV_NAME, 54 }, 55 {}, 56 }; 57 MODULE_DEVICE_TABLE(of, st_press_of_match); 58 #else 59 #define st_press_of_match NULL 60 #endif 61 62 static int st_press_spi_probe(struct spi_device *spi) 63 { 64 const struct st_sensor_settings *settings; 65 struct st_sensor_data *press_data; 66 struct iio_dev *indio_dev; 67 int err; 68 69 st_sensors_of_name_probe(&spi->dev, st_press_of_match, 70 spi->modalias, sizeof(spi->modalias)); 71 72 settings = st_press_get_settings(spi->modalias); 73 if (!settings) { 74 dev_err(&spi->dev, "device name %s not recognized.\n", 75 spi->modalias); 76 return -ENODEV; 77 } 78 79 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data)); 80 if (!indio_dev) 81 return -ENOMEM; 82 83 press_data = iio_priv(indio_dev); 84 press_data->sensor_settings = (struct st_sensor_settings *)settings; 85 86 err = st_sensors_spi_configure(indio_dev, spi); 87 if (err < 0) 88 return err; 89 90 err = st_press_common_probe(indio_dev); 91 if (err < 0) 92 return err; 93 94 return 0; 95 } 96 97 static int st_press_spi_remove(struct spi_device *spi) 98 { 99 st_press_common_remove(spi_get_drvdata(spi)); 100 101 return 0; 102 } 103 104 static const struct spi_device_id st_press_id_table[] = { 105 { LPS001WP_PRESS_DEV_NAME }, 106 { LPS25H_PRESS_DEV_NAME }, 107 { LPS331AP_PRESS_DEV_NAME }, 108 { LPS22HB_PRESS_DEV_NAME }, 109 { LPS33HW_PRESS_DEV_NAME }, 110 { LPS35HW_PRESS_DEV_NAME }, 111 { LPS22HH_PRESS_DEV_NAME }, 112 {}, 113 }; 114 MODULE_DEVICE_TABLE(spi, st_press_id_table); 115 116 static struct spi_driver st_press_driver = { 117 .driver = { 118 .name = "st-press-spi", 119 .of_match_table = of_match_ptr(st_press_of_match), 120 }, 121 .probe = st_press_spi_probe, 122 .remove = st_press_spi_remove, 123 .id_table = st_press_id_table, 124 }; 125 module_spi_driver(st_press_driver); 126 127 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); 128 MODULE_DESCRIPTION("STMicroelectronics pressures spi driver"); 129 MODULE_LICENSE("GPL v2"); 130