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 | |
18 | static 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 | |
26 | static 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 | |
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 | |