diff options
Diffstat (limited to 'drivers/iio/humidity/hts221_spi.c')
-rw-r--r-- | drivers/iio/humidity/hts221_spi.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/drivers/iio/humidity/hts221_spi.c b/drivers/iio/humidity/hts221_spi.c new file mode 100644 index 0000000000..fc4adb68fa --- /dev/null +++ b/drivers/iio/humidity/hts221_spi.c @@ -0,0 +1,69 @@ +// 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 <lorenzo.bianconi@st.com>"); +MODULE_DESCRIPTION("STMicroelectronics hts221 spi driver"); +MODULE_LICENSE("GPL v2"); +MODULE_IMPORT_NS(IIO_HTS221); |