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
16 static void __iomem *msm_ps_hold;
17
do_msm_poweroff(struct sys_off_data * data)18 static int do_msm_poweroff(struct sys_off_data *data)
19 {
20 writel(0, msm_ps_hold);
21 mdelay(10000);
22
23 return NOTIFY_DONE;
24 }
25
msm_restart_probe(struct platform_device * pdev)26 static int msm_restart_probe(struct platform_device *pdev)
27 {
28 msm_ps_hold = devm_platform_ioremap_resource(pdev, 0);
29 if (IS_ERR(msm_ps_hold))
30 return PTR_ERR(msm_ps_hold);
31
32 devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_RESTART,
33 128, do_msm_poweroff, NULL);
34
35 devm_register_sys_off_handler(&pdev->dev, SYS_OFF_MODE_POWER_OFF,
36 SYS_OFF_PRIO_DEFAULT, do_msm_poweroff,
37 NULL);
38
39 return 0;
40 }
41
42 static const struct of_device_id of_msm_restart_match[] = {
43 { .compatible = "qcom,pshold", },
44 {},
45 };
46 MODULE_DEVICE_TABLE(of, of_msm_restart_match);
47
48 static 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 };
55 builtin_platform_driver(msm_restart_driver);
56