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