1// SPDX-License-Identifier: GPL-2.0-only
2/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
3 */
4
5#include <linux/delay.h>
6#include <linux/err.h>
7#include <linux/init.h>
8#include <linux/kernel.h>
9#include <linux/io.h>
10#include <linux/of.h>
11#include <linux/platform_device.h>
12#include <linux/module.h>
13#include <linux/reboot.h>
14#include <linux/pm.h>
15
16static void __iomem *msm_ps_hold;
17
18static int do_msm_poweroff(struct sys_off_data *data)
19{
20 writel(val: 0, addr: msm_ps_hold);
21 mdelay(10000);
22
23 return NOTIFY_DONE;
24}
25
26static int msm_restart_probe(struct platform_device *pdev)
27{
28 msm_ps_hold = devm_platform_ioremap_resource(pdev, index: 0);
29 if (IS_ERR(ptr: msm_ps_hold))
30 return PTR_ERR(ptr: msm_ps_hold);
31
32 devm_register_sys_off_handler(dev: &pdev->dev, mode: SYS_OFF_MODE_RESTART,
33 priority: 128, callback: do_msm_poweroff, NULL);
34
35 devm_register_sys_off_handler(dev: &pdev->dev, mode: SYS_OFF_MODE_POWER_OFF,
36 SYS_OFF_PRIO_DEFAULT, callback: do_msm_poweroff,
37 NULL);
38
39 return 0;
40}
41
42static const struct of_device_id of_msm_restart_match[] = {
43 { .compatible = "qcom,pshold", },
44 {},
45};
46MODULE_DEVICE_TABLE(of, of_msm_restart_match);
47
48static struct platform_driver msm_restart_driver = {
49 .probe = msm_restart_probe,
50 .driver = {
51 .name = "msm-restart",
52 .of_match_table = of_match_ptr(of_msm_restart_match),
53 },
54};
55builtin_platform_driver(msm_restart_driver);
56

source code of linux/drivers/power/reset/msm-poweroff.c