linux/drivers/iio/dac/ad5504.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * AD5504, AD5501 High Voltage Digital to Analog Converter
 *
 * Copyright 2011 Analog Devices Inc.
 */

#include <linux/interrupt.h>
#include <linux/fs.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/regulator/consumer.h>
#include <linux/module.h>
#include <linux/bitops.h>

#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/events.h>
#include <linux/iio/dac/ad5504.h>

#define AD5504_RES_MASK …
#define AD5504_CMD_READ …
#define AD5504_CMD_WRITE …
#define AD5504_ADDR(addr) …

/* Registers */
#define AD5504_ADDR_NOOP …
#define AD5504_ADDR_DAC(x) …
#define AD5504_ADDR_ALL_DAC …
#define AD5504_ADDR_CTRL …

/* Control Register */
#define AD5504_DAC_PWR(ch) …
#define AD5504_DAC_PWRDWN_MODE(mode) …
#define AD5504_DAC_PWRDN_20K …
#define AD5504_DAC_PWRDN_3STATE …

/**
 * struct ad5504_state - driver instance specific data
 * @spi:			spi_device
 * @reg:		supply regulator
 * @vref_mv:		actual reference voltage used
 * @pwr_down_mask:	power down mask
 * @pwr_down_mode:	current power down mode
 * @data:		transfer buffer
 */
struct ad5504_state { … };

/*
 * ad5504_supported_device_ids:
 */
enum ad5504_supported_device_ids { … };

static int ad5504_spi_write(struct ad5504_state *st, u8 addr, u16 val)
{ … }

static int ad5504_spi_read(struct ad5504_state *st, u8 addr)
{ … }

static int ad5504_read_raw(struct iio_dev *indio_dev,
			   struct iio_chan_spec const *chan,
			   int *val,
			   int *val2,
			   long m)
{ … }

static int ad5504_write_raw(struct iio_dev *indio_dev,
			       struct iio_chan_spec const *chan,
			       int val,
			       int val2,
			       long mask)
{ … }

static const char * const ad5504_powerdown_modes[] = …;

static int ad5504_get_powerdown_mode(struct iio_dev *indio_dev,
	const struct iio_chan_spec *chan)
{ … }

static int ad5504_set_powerdown_mode(struct iio_dev *indio_dev,
	const struct iio_chan_spec *chan, unsigned int mode)
{ … }

static const struct iio_enum ad5504_powerdown_mode_enum = …;

static ssize_t ad5504_read_dac_powerdown(struct iio_dev *indio_dev,
	uintptr_t private, const struct iio_chan_spec *chan, char *buf)
{ … }

static ssize_t ad5504_write_dac_powerdown(struct iio_dev *indio_dev,
	uintptr_t private, const struct iio_chan_spec *chan, const char *buf,
	size_t len)
{ … }

static IIO_CONST_ATTR(temp0_thresh_rising_value, "110000");
static IIO_CONST_ATTR(temp0_thresh_rising_en, "1");

static struct attribute *ad5504_ev_attributes[] = …;

static const struct attribute_group ad5504_ev_attribute_group = …;

static irqreturn_t ad5504_event_handler(int irq, void *private)
{ … }

static const struct iio_info ad5504_info = …;

static const struct iio_chan_spec_ext_info ad5504_ext_info[] = …;

#define AD5504_CHANNEL(_chan) …

static const struct iio_chan_spec ad5504_channels[] = …;

static int ad5504_probe(struct spi_device *spi)
{ … }

static void ad5504_remove(struct spi_device *spi)
{ … }

static const struct spi_device_id ad5504_id[] = …;
MODULE_DEVICE_TABLE(spi, ad5504_id);

static struct spi_driver ad5504_driver = …;
module_spi_driver(…) …;

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