linux/drivers/comedi/drivers/addi_watchdog.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * COMEDI driver for the watchdog subdevice found on some addi-data boards
 * Copyright (c) 2013 H Hartley Sweeten <[email protected]>
 *
 * Based on implementations in various addi-data COMEDI drivers.
 *
 * COMEDI - Linux Control and Measurement Device Interface
 * Copyright (C) 1998 David A. Schleef <[email protected]>
 */

#include <linux/module.h>
#include <linux/comedi/comedidev.h>
#include "addi_tcw.h"
#include "addi_watchdog.h"

struct addi_watchdog_private { … };

/*
 * The watchdog subdevice is configured with two INSN_CONFIG instructions:
 *
 * Enable the watchdog and set the reload timeout:
 *	data[0] = INSN_CONFIG_ARM
 *	data[1] = timeout reload value
 *
 * Disable the watchdog:
 *	data[0] = INSN_CONFIG_DISARM
 */
static int addi_watchdog_insn_config(struct comedi_device *dev,
				     struct comedi_subdevice *s,
				     struct comedi_insn *insn,
				     unsigned int *data)
{ … }

static int addi_watchdog_insn_read(struct comedi_device *dev,
				   struct comedi_subdevice *s,
				   struct comedi_insn *insn,
				   unsigned int *data)
{ … }

static int addi_watchdog_insn_write(struct comedi_device *dev,
				    struct comedi_subdevice *s,
				    struct comedi_insn *insn,
				    unsigned int *data)
{ … }

void addi_watchdog_reset(unsigned long iobase)
{ … }
EXPORT_SYMBOL_GPL(…);

int addi_watchdog_init(struct comedi_subdevice *s, unsigned long iobase)
{ … }
EXPORT_SYMBOL_GPL(…);

static int __init addi_watchdog_module_init(void)
{ … }
module_init(…) …;

static void __exit addi_watchdog_module_exit(void)
{ … }
module_exit(addi_watchdog_module_exit);

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