tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* Copyright (c) 2013, The Linux Foundation. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 */
13
14#include <linux/delay.h>
15#include <linux/err.h>
16#include <linux/init.h>
17#include <linux/kernel.h>
18#include <linux/io.h>
19#include <linux/of.h>
20#include <linux/platform_device.h>
21#include <linux/module.h>
22#include <linux/reboot.h>
23
24#include <asm/system_misc.h>
25
26static void __iomem *msm_ps_hold;
27
28static void do_msm_restart(enum reboot_mode reboot_mode, const char *cmd)
29{
30 writel(0, msm_ps_hold);
31 mdelay(10000);
32}
33
34static void do_msm_poweroff(void)
35{
36 /* TODO: Add poweroff capability */
37 do_msm_restart(REBOOT_HARD, NULL);
38}
39
40static int msm_restart_probe(struct platform_device *pdev)
41{
42 struct device *dev = &pdev->dev;
43 struct resource *mem;
44
45 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
46 msm_ps_hold = devm_ioremap_resource(dev, mem);
47 if (IS_ERR(msm_ps_hold))
48 return PTR_ERR(msm_ps_hold);
49
50 pm_power_off = do_msm_poweroff;
51 arm_pm_restart = do_msm_restart;
52 return 0;
53}
54
55static const struct of_device_id of_msm_restart_match[] = {
56 { .compatible = "qcom,pshold", },
57 {},
58};
59MODULE_DEVICE_TABLE(of, of_msm_restart_match);
60
61static struct platform_driver msm_restart_driver = {
62 .probe = msm_restart_probe,
63 .driver = {
64 .name = "msm-restart",
65 .of_match_table = of_match_ptr(of_msm_restart_match),
66 },
67};
68
69static int __init msm_restart_init(void)
70{
71 return platform_driver_register(&msm_restart_driver);
72}
73device_initcall(msm_restart_init);