misc/pvpanic: add support to get pvpanic device info FDT (46f934c9) · Commits · 戴 / test

drivers/misc/pvpanic.c

+63 −1

Original line number	Diff line number	Diff line
		@@ -2,6 +2,7 @@
		* pvpanic.c - pvpanic Device Support
		*
		* Copyright (C) 2013 Fujitsu.
		* Copyright (C) 2018 ZTE.
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		@@ -22,6 +23,9 @@

		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/of.h>
		#include <linux/of_address.h>
		#include <linux/platform_device.h>
		#include <linux/init.h>
		#include <linux/types.h>
		#include <linux/acpi.h>
		@@ -123,4 +127,62 @@ static int pvpanic_remove(struct acpi_device *device)
		return 0;
		}

		module_acpi_driver(pvpanic_driver);
		static int pvpanic_mmio_probe(struct platform_device *pdev)
		{
		struct resource *mem;

		mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		if (!mem)
		return -EINVAL;

		base = devm_ioremap_resource(&pdev->dev, mem);
		if (base == NULL)
		return -EFAULT;

		atomic_notifier_chain_register(&panic_notifier_list,
		&pvpanic_panic_nb);

		return 0;
		}

		static int pvpanic_mmio_remove(struct platform_device *pdev)
		{

		atomic_notifier_chain_unregister(&panic_notifier_list,
		&pvpanic_panic_nb);

		return 0;
		}

		static const struct of_device_id pvpanic_mmio_match[] = {
		{ .compatible = "qemu,pvpanic-mmio", },
		{}
		};

		static struct platform_driver pvpanic_mmio_driver = {
		.driver = {
		.name = "pvpanic-mmio",
		.of_match_table = pvpanic_mmio_match,
		},
		.probe = pvpanic_mmio_probe,
		.remove = pvpanic_mmio_remove,
		};

		static int __init pvpanic_mmio_init(void)
		{
		if (acpi_disabled)
		return platform_driver_register(&pvpanic_mmio_driver);
		else
		return acpi_bus_register_driver(&pvpanic_driver);
		}

		static void __exit pvpanic_mmio_exit(void)
		{
		if (acpi_disabled)
		platform_driver_unregister(&pvpanic_mmio_driver);
		else
		acpi_bus_unregister_driver(&pvpanic_driver);
		}

		module_init(pvpanic_mmio_init);
		module_exit(pvpanic_mmio_exit);

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