drivers/iio/light/st_uvis25_spi.c

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