Quelle  hts221_spi.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * STMicroelectronics hts221 spi driver
 *
 * Copyright 2016 STMicroelectronics Inc.
 *
 * Lorenzo Bianconi <lorenzo.bianconi@st.com>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/regmap.h>

#include "hts221.h"

#define HTS221_SPI_READ   BIT(7)
#define HTS221_SPI_AUTO_INCREMENT BIT(6)

static const struct regmap_config hts221_spi_regmap_config = {
 .reg_bits = 8,
 .val_bits = 8,
 .write_flag_mask = HTS221_SPI_AUTO_INCREMENT,
 .read_flag_mask = HTS221_SPI_READ | HTS221_SPI_AUTO_INCREMENT,
};

static int hts221_spi_probe(struct spi_device *spi)
{
 struct regmap *regmap;

 regmap = devm_regmap_init_spi(spi, &hts221_spi_regmap_config);
 if (IS_ERR(regmap)) {
  dev_err(&spi->dev, "Failed to register spi regmap %ld\n",
   PTR_ERR(regmap));
  return PTR_ERR(regmap);
 }

 return hts221_probe(&spi->dev, spi->irq,
       spi->modalias, regmap);
}

static const struct of_device_id hts221_spi_of_match[] = {
 { .compatible = "st,hts221", },
 { }
};
MODULE_DEVICE_TABLE(of, hts221_spi_of_match);

static const struct spi_device_id hts221_spi_id_table[] = {
 { HTS221_DEV_NAME },
 { }
};
MODULE_DEVICE_TABLE(spi, hts221_spi_id_table);

static struct spi_driver hts221_driver = {
 .driver = {
  .name = "hts221_spi",
  .pm = pm_sleep_ptr(&hts221_pm_ops),
  .of_match_table = hts221_spi_of_match,
 },
 .probe = hts221_spi_probe,
 .id_table = hts221_spi_id_table,
};
module_spi_driver(hts221_driver);

MODULE_AUTHOR("Lorenzo Bianconi ");
MODULE_DESCRIPTION("STMicroelectronics hts221 spi driver");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS("IIO_HTS221");