linux-kernel - Re: [PATCH v5 1/2] clk: qcom: lpasscc-sc7810: Use devm in probe

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Date:   Thu, 29 Oct 2020 14:32:16 +0530
From:   Taniya Das <tdas@...eaurora.org>
To:     Douglas Anderson <dianders@...omium.org>,
        Stephen Boyd <sboyd@...nel.org>
Cc:     David Brown <david.brown@...aro.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        linux-soc@...r.kernel.org, Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 1/2] clk: qcom: lpasscc-sc7810: Use devm in probe

Reviewed-by: Taniya Das <tdas@...eaurora.org>

On 10/20/2020 4:19 AM, Douglas Anderson wrote:
> Let's convert the lpass clock control driver to use devm.  This is a
> few more lines of code, but it will be useful in a later patch which
> disentangles the two devices handled by this driver.
> 
> Signed-off-by: Douglas Anderson <dianders@...omium.org>
> ---
> 
> (no changes since v4)
> 
> Changes in v4:
> - Fixed typo lapss => lpass
> - Moved lpass_pm_runtime_disable() lpass_pm_clk_destroy() in file.
> 
> Changes in v3:
> - ("clk: qcom: lpasscc-sc7810: Use devm in probe") new for v3.
> 
>   drivers/clk/qcom/lpasscorecc-sc7180.c | 38 +++++++++++++++------------
>   1 file changed, 21 insertions(+), 17 deletions(-)
> 
> diff --git a/drivers/clk/qcom/lpasscorecc-sc7180.c b/drivers/clk/qcom/lpasscorecc-sc7180.c
> index 228d08f5d26f..2d15e33ec837 100644
> --- a/drivers/clk/qcom/lpasscorecc-sc7180.c
> +++ b/drivers/clk/qcom/lpasscorecc-sc7180.c
> @@ -356,6 +356,16 @@ static const struct qcom_cc_desc lpass_audio_hm_sc7180_desc = {
>   	.num_gdscs = ARRAY_SIZE(lpass_audio_hm_sc7180_gdscs),
>   };
>   
> +static void lpass_pm_runtime_disable(void *data)
> +{
> +	pm_runtime_disable(data);
> +}
> +
> +static void lpass_pm_clk_destroy(void *data)
> +{
> +	pm_clk_destroy(data);
> +}
> +
>   static int lpass_core_cc_sc7180_probe(struct platform_device *pdev)
>   {
>   	const struct qcom_cc_desc *desc;
> @@ -418,34 +428,28 @@ static int lpass_core_sc7180_probe(struct platform_device *pdev)
>   	int ret;
>   
>   	pm_runtime_enable(&pdev->dev);
> +	ret = devm_add_action_or_reset(&pdev->dev, lpass_pm_runtime_disable, &pdev->dev);
> +	if (ret)
> +		return ret;
> +
>   	ret = pm_clk_create(&pdev->dev);
>   	if (ret)
> -		goto disable_pm_runtime;
> +		return ret;
> +	ret = devm_add_action_or_reset(&pdev->dev, lpass_pm_clk_destroy, &pdev->dev);
> +	if (ret)
> +		return ret;
>   
>   	ret = pm_clk_add(&pdev->dev, "iface");
>   	if (ret < 0) {
>   		dev_err(&pdev->dev, "failed to acquire iface clock\n");
> -		goto destroy_pm_clk;
> +		return ret;
>   	}
>   
> -	ret = -EINVAL;
>   	clk_probe = of_device_get_match_data(&pdev->dev);
>   	if (!clk_probe)
> -		goto destroy_pm_clk;
> -
> -	ret = clk_probe(pdev);
> -	if (ret)
> -		goto destroy_pm_clk;
> -
> -	return 0;
> -
> -destroy_pm_clk:
> -	pm_clk_destroy(&pdev->dev);
> -
> -disable_pm_runtime:
> -	pm_runtime_disable(&pdev->dev);
> +		return -EINVAL;
>   
> -	return ret;
> +	return clk_probe(pdev);
>   }
>   
>   static const struct dev_pm_ops lpass_core_cc_pm_ops = {
> 

-- 
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