1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * STMicroelectronics uvis25 spi driver 4 * 5 * Copyright 2017 STMicroelectronics Inc. 6 * 7 * Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/mod_devicetable.h> 13 #include <linux/spi/spi.h> 14 #include <linux/slab.h> 15 #include <linux/regmap.h> 16 17 #include "st_uvis25.h" 18 19 #define UVIS25_SENSORS_SPI_READ BIT(7) 20 #define UVIS25_SPI_AUTO_INCREMENT BIT(6) 21 22 static const struct regmap_config st_uvis25_spi_regmap_config = { 23 .reg_bits = 8, 24 .val_bits = 8, 25 .read_flag_mask = UVIS25_SENSORS_SPI_READ | UVIS25_SPI_AUTO_INCREMENT, 26 .write_flag_mask = UVIS25_SPI_AUTO_INCREMENT, 27 }; 28 29 static int st_uvis25_spi_probe(struct spi_device *spi) 30 { 31 struct regmap *regmap; 32 33 regmap = devm_regmap_init_spi(spi, &st_uvis25_spi_regmap_config); 34 if (IS_ERR(regmap)) { 35 dev_err(&spi->dev, "Failed to register spi regmap %ld\n", 36 PTR_ERR(regmap)); 37 return PTR_ERR(regmap); 38 } 39 40 return st_uvis25_probe(&spi->dev, spi->irq, regmap); 41 } 42 43 static const struct of_device_id st_uvis25_spi_of_match[] = { 44 { .compatible = "st,uvis25", }, 45 {}, 46 }; 47 MODULE_DEVICE_TABLE(of, st_uvis25_spi_of_match); 48 49 static const struct spi_device_id st_uvis25_spi_id_table[] = { 50 { ST_UVIS25_DEV_NAME }, 51 {}, 52 }; 53 MODULE_DEVICE_TABLE(spi, st_uvis25_spi_id_table); 54 55 static struct spi_driver st_uvis25_driver = { 56 .driver = { 57 .name = "st_uvis25_spi", 58 .pm = &st_uvis25_pm_ops, 59 .of_match_table = st_uvis25_spi_of_match, 60 }, 61 .probe = st_uvis25_spi_probe, 62 .id_table = st_uvis25_spi_id_table, 63 }; 64 module_spi_driver(st_uvis25_driver); 65 66 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi83@gmail.com>"); 67 MODULE_DESCRIPTION("STMicroelectronics uvis25 spi driver"); 68 MODULE_LICENSE("GPL v2"); 69