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- // SPDX-License-Identifier: GPL-2.0-only
- /* Copyright (c) 2013, The Linux Foundation. All rights reserved.
- */
- #include <linux/delay.h>
- #include <linux/err.h>
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/io.h>
- #include <linux/of.h>
- #include <linux/platform_device.h>
- #include <linux/module.h>
- #include <linux/reboot.h>
- #include <linux/pm.h>
- static void __iomem *msm_ps_hold;
- static int deassert_pshold(struct notifier_block *nb, unsigned long action,
- void *data)
- {
- writel(0, msm_ps_hold);
- mdelay(10000);
- return NOTIFY_DONE;
- }
- static struct notifier_block restart_nb = {
- .notifier_call = deassert_pshold,
- .priority = 128,
- };
- static void do_msm_poweroff(void)
- {
- deassert_pshold(&restart_nb, 0, NULL);
- }
- static int msm_restart_probe(struct platform_device *pdev)
- {
- struct device *dev = &pdev->dev;
- struct resource *mem;
- mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- msm_ps_hold = devm_ioremap_resource(dev, mem);
- if (IS_ERR(msm_ps_hold))
- return PTR_ERR(msm_ps_hold);
- register_restart_handler(&restart_nb);
- pm_power_off = do_msm_poweroff;
- return 0;
- }
- static const struct of_device_id of_msm_restart_match[] = {
- { .compatible = "qcom,pshold", },
- {},
- };
- MODULE_DEVICE_TABLE(of, of_msm_restart_match);
- static struct platform_driver msm_restart_driver = {
- .probe = msm_restart_probe,
- .driver = {
- .name = "msm-restart",
- .of_match_table = of_match_ptr(of_msm_restart_match),
- },
- };
- static int __init msm_restart_init(void)
- {
- return platform_driver_register(&msm_restart_driver);
- }
- device_initcall(msm_restart_init);
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