linux/drivers/firmware/google/cbmem.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * cbmem.c
 *
 * Driver for exporting cbmem entries in sysfs.
 *
 * Copyright 2022 Google LLC
 */

#include <linux/device.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/kobject.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/sysfs.h>

#include "coreboot_table.h"

struct cbmem_entry { … };

static struct cbmem_entry *to_cbmem_entry(struct kobject *kobj)
{ … }

static ssize_t mem_read(struct file *filp, struct kobject *kobj,
			struct bin_attribute *bin_attr, char *buf, loff_t pos,
			size_t count)
{ … }

static ssize_t mem_write(struct file *filp, struct kobject *kobj,
			 struct bin_attribute *bin_attr, char *buf, loff_t pos,
			 size_t count)
{ … }
static BIN_ATTR_ADMIN_RW(mem, 0);

static ssize_t address_show(struct device *dev, struct device_attribute *attr,
			    char *buf)
{ … }
static DEVICE_ATTR_RO(address);

static ssize_t size_show(struct device *dev, struct device_attribute *attr,
			 char *buf)
{ … }
static DEVICE_ATTR_RO(size);

static struct attribute *attrs[] = …;

static struct bin_attribute *bin_attrs[] = …;

static const struct attribute_group cbmem_entry_group = …;

static const struct attribute_group *dev_groups[] = …;

static int cbmem_entry_probe(struct coreboot_device *dev)
{ … }

static const struct coreboot_device_id cbmem_ids[] = …;
MODULE_DEVICE_TABLE(coreboot, cbmem_ids);

static struct coreboot_driver cbmem_entry_driver = …;
module_coreboot_driver(…) …;

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