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watchdog: ath79_wdt: Use the devm_clk_get_enabled() helper function

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The devm_clk_get_enabled() helper:
    - calls devm_clk_get()
    - calls clk_prepare_enable() and registers what is needed in order to
      call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code.

Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230824135514.2661364-3-ruanjinjie@huawei.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This commit is contained in:
Jinjie Ruan 2023-08-24 21:55:13 +08:00 committed by Wim Van Sebroeck
parent 3cbb42827d
commit c51a6977bd
1 changed files with 4 additions and 15 deletions
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19
drivers/watchdog/ath79_wdt.c
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@ -257,19 +257,13 @@ static int ath79_wdt_probe(struct platform_device *pdev)
if (IS_ERR(wdt_base))
return PTR_ERR(wdt_base);
wdt_clk = devm_clk_get(&pdev->dev, "wdt");
wdt_clk = devm_clk_get_enabled(&pdev->dev, "wdt");
if (IS_ERR(wdt_clk))
return PTR_ERR(wdt_clk);
err = clk_prepare_enable(wdt_clk);
if (err)
return err;
wdt_freq = clk_get_rate(wdt_clk);
if (!wdt_freq) {
err = -EINVAL;
goto err_clk_disable;
}
if (!wdt_freq)
return -EINVAL;
max_timeout = (0xfffffffful / wdt_freq);
if (timeout < 1 || timeout > max_timeout) {
@ -286,20 +280,15 @@ static int ath79_wdt_probe(struct platform_device *pdev)
if (err) {
dev_err(&pdev->dev,
"unable to register misc device, err=%d\n", err);
goto err_clk_disable;
return err;
}
return 0;
err_clk_disable:
clk_disable_unprepare(wdt_clk);
return err;
}
static void ath79_wdt_remove(struct platform_device *pdev)
{
misc_deregister(&ath79_wdt_miscdev);
clk_disable_unprepare(wdt_clk);
}
static void ath79_wdt_shutdown(struct platform_device *pdev)