linux/drivers/iio/resolver/ad2s1200.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * ad2s1200.c simple support for the ADI Resolver to Digital Converters:
 * AD2S1200/1205
 *
 * Copyright (c) 2018-2018 David Veenstra <[email protected]>
 * Copyright (c) 2010-2010 Analog Devices Inc.
 */

#include <linux/bitops.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/mutex.h>
#include <linux/spi/spi.h>
#include <linux/sysfs.h>
#include <linux/types.h>

#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>

#define DRV_NAME …

/* input clock on serial interface */
#define AD2S1200_HZ …
/* clock period in nano second */
#define AD2S1200_TSCLK …

/**
 * struct ad2s1200_state - driver instance specific data.
 * @lock:	protects both the GPIO pins and the rx buffer.
 * @sdev:	spi device.
 * @sample:	GPIO pin SAMPLE.
 * @rdvel:	GPIO pin RDVEL.
 * @rx:		buffer for spi transfers.
 */
struct ad2s1200_state { … };

static int ad2s1200_read_raw(struct iio_dev *indio_dev,
			     struct iio_chan_spec const *chan,
			     int *val,
			     int *val2,
			     long m)
{ … }

static const struct iio_chan_spec ad2s1200_channels[] = …;

static const struct iio_info ad2s1200_info = …;

static int ad2s1200_probe(struct spi_device *spi)
{ … }

static const struct of_device_id ad2s1200_of_match[] = …;
MODULE_DEVICE_TABLE(of, ad2s1200_of_match);

static const struct spi_device_id ad2s1200_id[] = …;
MODULE_DEVICE_TABLE(spi, ad2s1200_id);

static struct spi_driver ad2s1200_driver = …;
module_spi_driver(…) …;

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