linux/drivers/iio/adc/ti-tlc4541.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * TI tlc4541 ADC Driver
 *
 * Copyright (C) 2017 Phil Reid
 *
 * Datasheets can be found here:
 * https://www.ti.com/lit/gpn/tlc3541
 * https://www.ti.com/lit/gpn/tlc4541
 *
 * The tlc4541 requires 24 clock cycles to start a transfer.
 * Conversion then takes 2.94us to complete before data is ready
 * Data is returned MSB first.
 */

#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/spi/spi.h>
#include <linux/sysfs.h>

struct tlc4541_state { … };

struct tlc4541_chip_info { … };

enum tlc4541_id { … };

#define TLC4541_V_CHAN(bits, bitshift) …

#define DECLARE_TLC4541_CHANNELS(name, bits, bitshift) …

static DECLARE_TLC4541_CHANNELS(tlc3541, 14, 2);
static DECLARE_TLC4541_CHANNELS(tlc4541, 16, 0);

static const struct tlc4541_chip_info tlc4541_chip_info[] = …;

static irqreturn_t tlc4541_trigger_handler(int irq, void *p)
{ … }

static int tlc4541_get_range(struct tlc4541_state *st)
{ … }

static int tlc4541_read_raw(struct iio_dev *indio_dev,
			    struct iio_chan_spec const *chan,
			    int *val,
			    int *val2,
			    long m)
{ … }

static const struct iio_info tlc4541_info = …;

static int tlc4541_probe(struct spi_device *spi)
{ … }

static void tlc4541_remove(struct spi_device *spi)
{ … }

static const struct of_device_id tlc4541_dt_ids[] = …;
MODULE_DEVICE_TABLE(of, tlc4541_dt_ids);

static const struct spi_device_id tlc4541_id[] = …;
MODULE_DEVICE_TABLE(spi, tlc4541_id);

static struct spi_driver tlc4541_driver = …;
module_spi_driver(…) …;

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