linux-kernel - Re: [PATCH v4 1/3] rtc: tegra: Use devm_clk_get

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Message-ID: <1f36b2a9-bf84-49f3-a27e-f264403c3ae1@nvidia.com>
Date: Fri, 24 Oct 2025 11:48:15 +0100
From: Jon Hunter <jonathanh@...dia.com>
To: Kartik Rajput <kkartik@...dia.com>, alexandre.belloni@...tlin.com,
 thierry.reding@...il.com, andriy.shevchenko@...ux.intel.com,
 linux-rtc@...r.kernel.org, linux-tegra@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 1/3] rtc: tegra: Use devm_clk_get_enabled() in probe


On 24/10/2025 07:49, Kartik Rajput wrote:
> Simplify clock management by replacing devm_clk_get() and manual clock
> enable/disable with devm_clk_get_enabled(). This also simplifies the
> error handling logic. Also remove tegra_rtc_remove() as the clock will
> automatically be disabled when the device is unbound from the bus.
> 
> Suggested-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> Signed-off-by: Kartik Rajput <kkartik@...dia.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> ---
> Changes in v4:
> 	* Removed tegra_rtc_remove() as this is not required now.
> 	* Updated commit message to specify this.
> ---
>   drivers/rtc/rtc-tegra.c | 26 ++++----------------------
>   1 file changed, 4 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
> index 46788db89953..e8c83a6a96b3 100644
> --- a/drivers/rtc/rtc-tegra.c
> +++ b/drivers/rtc/rtc-tegra.c
> @@ -300,14 +300,10 @@ static int tegra_rtc_probe(struct platform_device *pdev)
>   	info->rtc->ops = &tegra_rtc_ops;
>   	info->rtc->range_max = U32_MAX;
>   
> -	info->clk = devm_clk_get(&pdev->dev, NULL);
> +	info->clk = devm_clk_get_enabled(&pdev->dev, NULL);
>   	if (IS_ERR(info->clk))
>   		return PTR_ERR(info->clk);
>   
> -	ret = clk_prepare_enable(info->clk);
> -	if (ret < 0)
> -		return ret;
> -
>   	/* set context info */
>   	info->pdev = pdev;
>   	spin_lock_init(&info->lock);
> @@ -324,29 +320,16 @@ static int tegra_rtc_probe(struct platform_device *pdev)
>   	ret = devm_request_irq(&pdev->dev, info->irq, tegra_rtc_irq_handler,
>   			       IRQF_TRIGGER_HIGH, dev_name(&pdev->dev),
>   			       &pdev->dev);
> -	if (ret) {
> -		dev_err(&pdev->dev, "failed to request interrupt: %d\n", ret);
> -		goto disable_clk;
> -	}
> +	if (ret)
> +		return dev_err_probe(&pdev->dev, ret, "failed to request interrupt\n");
>   
>   	ret = devm_rtc_register_device(info->rtc);
>   	if (ret)
> -		goto disable_clk;
> +		return ret;
>   
>   	dev_notice(&pdev->dev, "Tegra internal Real Time Clock\n");
>   
>   	return 0;
> -
> -disable_clk:
> -	clk_disable_unprepare(info->clk);
> -	return ret;
> -}
> -
> -static void tegra_rtc_remove(struct platform_device *pdev)
> -{
> -	struct tegra_rtc_info *info = platform_get_drvdata(pdev);
> -
> -	clk_disable_unprepare(info->clk);
>   }
>   
>   #ifdef CONFIG_PM_SLEEP
> @@ -399,7 +382,6 @@ static void tegra_rtc_shutdown(struct platform_device *pdev)
>   
>   static struct platform_driver tegra_rtc_driver = {
>   	.probe = tegra_rtc_probe,
> -	.remove = tegra_rtc_remove,
>   	.shutdown = tegra_rtc_shutdown,
>   	.driver = {
>   		.name = "tegra_rtc",

Reviewed-by: Jon Hunter <jonathanh@...dia.com>

Thanks!
Jon

-- 
nvpublic