projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 78be3176 AK |
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> | |
| 18a702e0 | 23 | #include <linux/pm.h> |
| 78be3176 AK |
24 | |
| 25 | static void __iomem *msm_ps_hold; | |
| 18a702e0 PG |
26 | static int do_msm_restart(struct notifier_block *nb, unsigned long action, |
| 27 | void *data) | |
| 78be3176 AK |
28 | { |
| 29 | writel(0, msm_ps_hold); | |
| 30 | mdelay(10000); | |
| 18a702e0 PG |
31 | |
| 32 | return NOTIFY_DONE; | |
| 78be3176 AK |
33 | } |
| 34 | ||
| 18a702e0 PG |
35 | static struct notifier_block restart_nb = { |
| 36 | .notifier_call = do_msm_restart, | |
| 37 | .priority = 128, | |
| 38 | }; | |
| 39 | ||
| 78be3176 AK |
40 | static void do_msm_poweroff(void) |
| 41 | { | |
| 42 | /* TODO: Add poweroff capability */ | |
| 18a702e0 | 43 | do_msm_restart(&restart_nb, 0, NULL); |
| 78be3176 AK |
44 | } |
| 45 | ||
| 46 | static int msm_restart_probe(struct platform_device *pdev) | |
| 47 | { | |
| 48 | struct device *dev = &pdev->dev; | |
| 49 | struct resource *mem; | |
| 50 | ||
| 51 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
| 52 | msm_ps_hold = devm_ioremap_resource(dev, mem); | |
| 53 | if (IS_ERR(msm_ps_hold)) | |
| 54 | return PTR_ERR(msm_ps_hold); | |
| 55 | ||
| 18a702e0 PG |
56 | register_restart_handler(&restart_nb); |
| 57 | ||
| 78be3176 | 58 | pm_power_off = do_msm_poweroff; |
| 18a702e0 | 59 | |
| 78be3176 AK |
60 | return 0; |
| 61 | } | |
| 62 | ||
| 63 | static const struct of_device_id of_msm_restart_match[] = { | |
| 64 | { .compatible = "qcom,pshold", }, | |
| 65 | {}, | |
| 66 | }; | |
| 67 | MODULE_DEVICE_TABLE(of, of_msm_restart_match); | |
| 68 | ||
| 69 | static struct platform_driver msm_restart_driver = { | |
| 70 | .probe = msm_restart_probe, | |
| 71 | .driver = { | |
| 72 | .name = "msm-restart", | |
| 73 | .of_match_table = of_match_ptr(of_msm_restart_match), | |
| 74 | }, | |
| 75 | }; | |
| 76 | ||
| 77 | static int __init msm_restart_init(void) | |
| 78 | { | |
| 79 | return platform_driver_register(&msm_restart_driver); | |
| 80 | } | |
| 81 | device_initcall(msm_restart_init); |