linux/drivers/iio/chemical/bme680_spi.c

// SPDX-License-Identifier: GPL-2.0
/*
 * BME680 - SPI Driver
 *
 * Copyright (C) 2018 Himanshu Jha <[email protected]>
 */
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/spi/spi.h>

#include "bme680.h"

struct bme680_spi_bus_context { … };

/*
 * In SPI mode there are only 7 address bits, a "page" register determines
 * which part of the 8-bit range is active. This function looks at the address
 * and writes the page selection bit if needed
 */
static int bme680_regmap_spi_select_page(
	struct bme680_spi_bus_context *ctx, u8 reg)
{ … }

static int bme680_regmap_spi_write(void *context, const void *data,
				   size_t count)
{ … }

static int bme680_regmap_spi_read(void *context, const void *reg,
				  size_t reg_size, void *val, size_t val_size)
{ … }

static struct regmap_bus bme680_regmap_bus = …;

static int bme680_spi_probe(struct spi_device *spi)
{ … }

static const struct spi_device_id bme680_spi_id[] = …;
MODULE_DEVICE_TABLE(spi, bme680_spi_id);

static const struct of_device_id bme680_of_spi_match[] = …;
MODULE_DEVICE_TABLE(of, bme680_of_spi_match);

static struct spi_driver bme680_spi_driver = …;
module_spi_driver(…) …;

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_IMPORT_NS(…);