修改内核路径

hc

2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b

 kernel/drivers/watchdog/loongson1_wdt.c
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@@ -1,10 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Copyright (c) 2016 Yang Ling <gnaygnil@gmail.com>
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License as published by the
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- * Free Software Foundation; either version 2 of the License, or (at your
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- * option) any later version.
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  */
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 #include <linux/clk.h>
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@@ -83,38 +79,44 @@
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 	.set_timeout = ls1x_wdt_set_timeout,
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 };
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+static void ls1x_clk_disable_unprepare(void *data)
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+{
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+	clk_disable_unprepare(data);
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+}
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+
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 static int ls1x_wdt_probe(struct platform_device *pdev)
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 {
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+	struct device *dev = &pdev->dev;
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 	struct ls1x_wdt_drvdata *drvdata;
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 	struct watchdog_device *ls1x_wdt;
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 	unsigned long clk_rate;
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-	struct resource *res;
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 	int err;
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-	drvdata = devm_kzalloc(&pdev->dev, sizeof(*drvdata), GFP_KERNEL);
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+	drvdata = devm_kzalloc(dev, sizeof(*drvdata), GFP_KERNEL);
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 	if (!drvdata)
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 		return -ENOMEM;
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-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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-	drvdata->base = devm_ioremap_resource(&pdev->dev, res);
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+	drvdata->base = devm_platform_ioremap_resource(pdev, 0);
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 	if (IS_ERR(drvdata->base))
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 		return PTR_ERR(drvdata->base);
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-	drvdata->clk = devm_clk_get(&pdev->dev, pdev->name);
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+	drvdata->clk = devm_clk_get(dev, pdev->name);
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 	if (IS_ERR(drvdata->clk))
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 		return PTR_ERR(drvdata->clk);
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 	err = clk_prepare_enable(drvdata->clk);
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 	if (err) {
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-		dev_err(&pdev->dev, "clk enable failed\n");
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+		dev_err(dev, "clk enable failed\n");
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 		return err;
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 	}
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+	err = devm_add_action_or_reset(dev, ls1x_clk_disable_unprepare,
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+				       drvdata->clk);
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+	if (err)
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+		return err;
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 	clk_rate = clk_get_rate(drvdata->clk);
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-	if (!clk_rate) {
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-		err = -EINVAL;
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-		goto err0;
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-	}
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+	if (!clk_rate)
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+		return -EINVAL;
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 	drvdata->clk_rate = clk_rate;
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 	ls1x_wdt = &drvdata->wdt;
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@@ -123,41 +125,25 @@
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 	ls1x_wdt->timeout = DEFAULT_HEARTBEAT;
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 	ls1x_wdt->min_timeout = 1;
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 	ls1x_wdt->max_hw_heartbeat_ms = U32_MAX / clk_rate * 1000;
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-	ls1x_wdt->parent = &pdev->dev;
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+	ls1x_wdt->parent = dev;
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-	watchdog_init_timeout(ls1x_wdt, heartbeat, &pdev->dev);
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+	watchdog_init_timeout(ls1x_wdt, heartbeat, dev);
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 	watchdog_set_nowayout(ls1x_wdt, nowayout);
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 	watchdog_set_drvdata(ls1x_wdt, drvdata);
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-	err = watchdog_register_device(&drvdata->wdt);
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-	if (err) {
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-		dev_err(&pdev->dev, "failed to register watchdog device\n");
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-		goto err0;
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-	}
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+	err = devm_watchdog_register_device(dev, &drvdata->wdt);
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+	if (err)
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+		return err;
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 	platform_set_drvdata(pdev, drvdata);
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-	dev_info(&pdev->dev, "Loongson1 Watchdog driver registered\n");
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-
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-	return 0;
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-err0:
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-	clk_disable_unprepare(drvdata->clk);
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-	return err;
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-}
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-
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-static int ls1x_wdt_remove(struct platform_device *pdev)
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-{
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-	struct ls1x_wdt_drvdata *drvdata = platform_get_drvdata(pdev);
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-
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-	watchdog_unregister_device(&drvdata->wdt);
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-	clk_disable_unprepare(drvdata->clk);
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+	dev_info(dev, "Loongson1 Watchdog driver registered\n");
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 	return 0;
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 }
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 static struct platform_driver ls1x_wdt_driver = {
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 	.probe = ls1x_wdt_probe,
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-	.remove = ls1x_wdt_remove,
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 	.driver = {
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 		.name = "ls1x-wdt",
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 	},