81 lines
2 KiB
C
81 lines
2 KiB
C
|
/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License version 2 and
|
||
|
|
* only version 2 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/delay.h>
|
||
|
|
#include <linux/err.h>
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <linux/of.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/reboot.h>
|
||
|
|
#include <linux/pm.h>
|
||
|
|
|
||
|
|
static void __iomem *msm_ps_hold;
|
||
|
|
static int deassert_pshold(struct notifier_block *nb, unsigned long action,
|
||
|
|
void *data)
|
||
|
|
{
|
||
|
|
writel(0, msm_ps_hold);
|
||
|
|
mdelay(10000);
|
||
|
|
|
||
|
|
return NOTIFY_DONE;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct notifier_block restart_nb = {
|
||
|
|
.notifier_call = deassert_pshold,
|
||
|
|
.priority = 128,
|
||
|
|
};
|
||
|
|
|
||
|
|
static void do_msm_poweroff(void)
|
||
|
|
{
|
||
|
|
deassert_pshold(&restart_nb, 0, NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
static int msm_restart_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct device *dev = &pdev->dev;
|
||
|
|
struct resource *mem;
|
||
|
|
|
||
|
|
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||
|
|
msm_ps_hold = devm_ioremap_resource(dev, mem);
|
||
|
|
if (IS_ERR(msm_ps_hold))
|
||
|
|
return PTR_ERR(msm_ps_hold);
|
||
|
|
|
||
|
|
register_restart_handler(&restart_nb);
|
||
|
|
|
||
|
|
pm_power_off = do_msm_poweroff;
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct of_device_id of_msm_restart_match[] = {
|
||
|
|
{ .compatible = "qcom,pshold", },
|
||
|
|
{},
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, of_msm_restart_match);
|
||
|
|
|
||
|
|
static struct platform_driver msm_restart_driver = {
|
||
|
|
.probe = msm_restart_probe,
|
||
|
|
.driver = {
|
||
|
|
.name = "msm-restart",
|
||
|
|
.of_match_table = of_match_ptr(of_msm_restart_match),
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __init msm_restart_init(void)
|
||
|
|
{
|
||
|
|
return platform_driver_register(&msm_restart_driver);
|
||
|
|
}
|
||
|
|
device_initcall(msm_restart_init);
|