linux/drivers/mfd/janz-cmodio.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Janz CMOD-IO MODULbus Carrier Board PCI Driver
 *
 * Copyright (c) 2010 Ira W. Snyder <[email protected]>
 *
 * Lots of inspiration and code was copied from drivers/mfd/sm501.c
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/mfd/core.h>

#include <linux/mfd/janz.h>

#define DRV_NAME …

/* Size of each MODULbus module in PCI BAR4 */
#define CMODIO_MODULBUS_SIZE …

/* Maximum number of MODULbus modules on a CMOD-IO carrier board */
#define CMODIO_MAX_MODULES …

/* Module Parameters */
static unsigned int num_modules = …;
static char *modules[CMODIO_MAX_MODULES] = …;

module_param_array(…);
MODULE_PARM_DESC(…) …;

/* Unique Device Id */
static unsigned int cmodio_id;

struct cmodio_device { … };

/*
 * Subdevices using the mfd-core API
 */

static int cmodio_setup_subdevice(struct cmodio_device *priv,
					    char *name, unsigned int devno,
					    unsigned int modno)
{ … }

/* Probe each submodule using kernel parameters */
static int cmodio_probe_submodules(struct cmodio_device *priv)
{ … }

/*
 * SYSFS Attributes
 */

static ssize_t modulbus_number_show(struct device *dev,
				    struct device_attribute *attr, char *buf)
{ … }

static DEVICE_ATTR_RO(modulbus_number);

static struct attribute *cmodio_sysfs_attrs[] = …;

static const struct attribute_group cmodio_sysfs_attr_group = …;

/*
 * PCI Driver
 */

static int cmodio_pci_probe(struct pci_dev *dev,
				      const struct pci_device_id *id)
{ … }

static void cmodio_pci_remove(struct pci_dev *dev)
{ … }

#define PCI_VENDOR_ID_JANZ …

/* The list of devices that this module will support */
static const struct pci_device_id cmodio_pci_ids[] = …;
MODULE_DEVICE_TABLE(pci, cmodio_pci_ids);

static struct pci_driver cmodio_pci_driver = …;

module_pci_driver(…) …;

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