Commit 8862c1f2 authored by Guenter Roeck's avatar Guenter Roeck Committed by Wim Van Sebroeck
Browse files

watchdog: pnx4008_wdt: Convert to use device managed functions and other improvements 

Use device managed functions to simplify error handling, reduce
source code size, improve readability, and reduce the likelyhood of bugs.
Other improvements as listed below.

The conversion was done automatically with coccinelle using the
following semantic patches. The semantic patches and the scripts
used to generate this commit log are available at
https://github.com/groeck/coccinelle-patches



- Drop empty remove function
- Use devm_add_action_or_reset() for calls to clk_disable_unprepare
- Introduce local variable 'struct device *dev' and use it instead of
  dereferencing it repeatedly
- Use devm_watchdog_register_driver() to register watchdog device

Cc: Vladimir Zapolskiy <vz@mleia.com>
Cc: Sylvain Lemieux <slemieux.tyco@gmail.com>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@linux-watchdog.org>
parent 81df6db6

drivers/watchdog/pnx4008_wdt.c

+17 −21
Original line number Diff line number Diff line
@@ -183,52 +183,49 @@ static struct watchdog_device pnx4008_wdd = { 
	.max_timeout = MAX_HEARTBEAT,

};



static void pnx4008_clk_disable_unprepare(void *data)

{

	clk_disable_unprepare(data);

}



static int pnx4008_wdt_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;

	int ret = 0;



	watchdog_init_timeout(&pnx4008_wdd, heartbeat, &pdev->dev);

	watchdog_init_timeout(&pnx4008_wdd, heartbeat, dev);



	wdt_base = devm_platform_ioremap_resource(pdev, 0);

	if (IS_ERR(wdt_base))

		return PTR_ERR(wdt_base);



	wdt_clk = devm_clk_get(&pdev->dev, NULL);

	wdt_clk = devm_clk_get(dev, NULL);

	if (IS_ERR(wdt_clk))

		return PTR_ERR(wdt_clk);



	ret = clk_prepare_enable(wdt_clk);

	if (ret)

		return ret;

	ret = devm_add_action_or_reset(dev, pnx4008_clk_disable_unprepare,

				       wdt_clk);

	if (ret)

		return ret;



	pnx4008_wdd.bootstatus = (readl(WDTIM_RES(wdt_base)) & WDOG_RESET) ?

			WDIOF_CARDRESET : 0;

	pnx4008_wdd.parent = &pdev->dev;

	pnx4008_wdd.parent = dev;

	watchdog_set_nowayout(&pnx4008_wdd, nowayout);

	watchdog_set_restart_priority(&pnx4008_wdd, 128);



	pnx4008_wdt_stop(&pnx4008_wdd);	/* disable for now */



	ret = watchdog_register_device(&pnx4008_wdd);

	ret = devm_watchdog_register_device(dev, &pnx4008_wdd);

	if (ret < 0) {

		dev_err(&pdev->dev, "cannot register watchdog device\n");

		goto disable_clk;

	}



	dev_info(&pdev->dev, "heartbeat %d sec\n", pnx4008_wdd.timeout);



	return 0;



disable_clk:

	clk_disable_unprepare(wdt_clk);

		dev_err(dev, "cannot register watchdog device\n");

		return ret;

	}



static int pnx4008_wdt_remove(struct platform_device *pdev)

{

	watchdog_unregister_device(&pnx4008_wdd);



	clk_disable_unprepare(wdt_clk);

	dev_info(dev, "heartbeat %d sec\n", pnx4008_wdd.timeout);



	return 0;

}
@@ -247,7 +244,6 @@ static struct platform_driver platform_wdt_driver = { 
		.of_match_table = of_match_ptr(pnx4008_wdt_match),

	},

	.probe = pnx4008_wdt_probe,

	.remove = pnx4008_wdt_remove,

};



module_platform_driver(platform_wdt_driver);

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