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/*
* Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include <linux/reboot.h>
#include <linux/regmap.h>
#include <linux/mfd/syscon.h>
#include "reboot-mode.h"
static struct regmap *map;
static u32 offset;
static u32 mask = 0xffffffff;
static int syscon_reboot_mode_write(int magic)
{
regmap_update_bits(map, offset, mask, magic);
return 0;
}
static int syscon_reboot_mode_read(void)
{
u32 val = 0;
regmap_read(map, offset, &val);
return val;
}
static int syscon_reboot_mode_probe(struct platform_device *pdev)
{
int ret;
map = syscon_node_to_regmap(pdev->dev.parent->of_node);
if (IS_ERR(map))
return PTR_ERR(map);
if (of_property_read_u32(pdev->dev.of_node, "offset", &offset))
return -EINVAL;
of_property_read_u32(pdev->dev.of_node, "mask", &mask);
ret = reboot_mode_register(&pdev->dev, syscon_reboot_mode_write,
syscon_reboot_mode_read);
if (ret)
dev_err(&pdev->dev, "can't register reboot mode\n");
return ret;
}
static const struct of_device_id syscon_reboot_mode_of_match[] = {
{ .compatible = "syscon-reboot-mode" },
{}
};
static struct platform_driver syscon_reboot_mode_driver = {
.probe = syscon_reboot_mode_probe,
.driver = {
.name = "syscon-reboot-mode",
.of_match_table = syscon_reboot_mode_of_match,
},
};
module_platform_driver(syscon_reboot_mode_driver);
MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com");
MODULE_DESCRIPTION("SYSCON reboot mode driver");
MODULE_LICENSE("GPL v2");
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