1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * STMicroelectronics hts221 spi driver 4 * 5 * Copyright 2016 STMicroelectronics Inc. 6 * 7 * Lorenzo Bianconi <lorenzo.bianconi@st.com> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/spi/spi.h> 13 #include <linux/slab.h> 14 #include <linux/regmap.h> 15 16 #include "hts221.h" 17 18 #define HTS221_SPI_READ BIT(7) 19 #define HTS221_SPI_AUTO_INCREMENT BIT(6) 20 21 static const struct regmap_config hts221_spi_regmap_config = { 22 .reg_bits = 8, 23 .val_bits = 8, 24 .write_flag_mask = HTS221_SPI_AUTO_INCREMENT, 25 .read_flag_mask = HTS221_SPI_READ | HTS221_SPI_AUTO_INCREMENT, 26 }; 27 28 static int hts221_spi_probe(struct spi_device *spi) 29 { 30 struct regmap *regmap; 31 32 regmap = devm_regmap_init_spi(spi, &hts221_spi_regmap_config); 33 if (IS_ERR(regmap)) { 34 dev_err(&spi->dev, "Failed to register spi regmap %ld\n", 35 PTR_ERR(regmap)); 36 return PTR_ERR(regmap); 37 } 38 39 return hts221_probe(&spi->dev, spi->irq, 40 spi->modalias, regmap); 41 } 42 43 static const struct of_device_id hts221_spi_of_match[] = { 44 { .compatible = "st,hts221", }, 45 {}, 46 }; 47 MODULE_DEVICE_TABLE(of, hts221_spi_of_match); 48 49 static const struct spi_device_id hts221_spi_id_table[] = { 50 { HTS221_DEV_NAME }, 51 {}, 52 }; 53 MODULE_DEVICE_TABLE(spi, hts221_spi_id_table); 54 55 static struct spi_driver hts221_driver = { 56 .driver = { 57 .name = "hts221_spi", 58 .pm = pm_sleep_ptr(&hts221_pm_ops), 59 .of_match_table = hts221_spi_of_match, 60 }, 61 .probe = hts221_spi_probe, 62 .id_table = hts221_spi_id_table, 63 }; 64 module_spi_driver(hts221_driver); 65 66 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>"); 67 MODULE_DESCRIPTION("STMicroelectronics hts221 spi driver"); 68 MODULE_LICENSE("GPL v2"); 69 MODULE_IMPORT_NS(IIO_HTS221); 70