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