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/*
* coreboot_table-of.c
*
* Coreboot table access through open firmware.
*
* Copyright 2017 Google Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2.0 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include "coreboot_table.h"
static int coreboot_table_of_probe(struct platform_device *pdev)
{
struct device_node *fw_dn = pdev->dev.of_node;
void __iomem *ptr;
ptr = of_iomap(fw_dn, 0);
of_node_put(fw_dn);
if (!ptr)
return -ENOMEM;
return coreboot_table_init(ptr);
}
static int coreboot_table_of_remove(struct platform_device *pdev)
{
return coreboot_table_exit();
}
static const struct of_device_id coreboot_of_match[] = {
{ .compatible = "coreboot" },
{},
};
static struct platform_driver coreboot_table_of_driver = {
.probe = coreboot_table_of_probe,
.remove = coreboot_table_of_remove,
.driver = {
.name = "coreboot_table_of",
.of_match_table = coreboot_of_match,
},
};
static int __init platform_coreboot_table_of_init(void)
{
struct platform_device *pdev;
struct device_node *of_node;
/* Limit device creation to the presence of /firmware/coreboot node */
of_node = of_find_node_by_path("/firmware/coreboot");
if (!of_node)
return -ENODEV;
if (!of_match_node(coreboot_of_match, of_node))
return -ENODEV;
pdev = of_platform_device_create(of_node, "coreboot_table_of", NULL);
if (!pdev)
return -ENODEV;
return platform_driver_register(&coreboot_table_of_driver);
}
module_init(platform_coreboot_table_of_init);
MODULE_AUTHOR("Google, Inc.");
MODULE_LICENSE("GPL");
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