89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
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*/
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <linux/reboot.h>
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#include <linux/pm.h>
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#include <linux/delay.h>
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#include <linux/of_address.h>
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#include <linux/panic_notifier.h>
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#include <asm/cacheflush.h>
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#include <asm/system_misc.h>
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#include <soc/qcom/watchdog.h>
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static int in_panic;
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static struct notifier_block restart_nb;
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static int panic_prep_restart(struct notifier_block *this,
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unsigned long event, void *ptr)
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{
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in_panic = 1;
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return NOTIFY_DONE;
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}
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static struct notifier_block panic_blk = {
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.notifier_call = panic_prep_restart,
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};
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static int do_vm_restart(struct notifier_block *unused, unsigned long action,
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void *arg)
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{
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pr_notice("Going down for vm restart now\n");
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if (in_panic)
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qcom_wdt_trigger_bite();
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return NOTIFY_DONE;
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}
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static int vm_restart_probe(struct platform_device *pdev)
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{
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atomic_notifier_chain_register(&panic_notifier_list, &panic_blk);
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restart_nb.notifier_call = do_vm_restart;
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restart_nb.priority = 200;
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register_restart_handler(&restart_nb);
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return 0;
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}
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static const struct of_device_id of_vm_restart_match[] = {
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{ .compatible = "qcom,vm-restart", },
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{},
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};
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MODULE_DEVICE_TABLE(of, of_vm_restart_match);
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static struct platform_driver vm_restart_driver = {
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.probe = vm_restart_probe,
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.driver = {
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.name = "msm-vm-restart",
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.of_match_table = of_match_ptr(of_vm_restart_match),
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},
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};
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static int __init vm_restart_init(void)
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{
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return platform_driver_register(&vm_restart_driver);
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}
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#if IS_MODULE(CONFIG_POWER_RESET_QCOM_VM)
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module_init(vm_restart_init);
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#else
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pure_initcall(vm_restart_init);
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#endif
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static __exit void vm_restart_exit(void)
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{
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platform_driver_unregister(&vm_restart_driver);
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}
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module_exit(vm_restart_exit);
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MODULE_DESCRIPTION("MSM VM Poweroff Driver");
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MODULE_LICENSE("GPL v2");
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