linux-kernel - Re: [PATCH v3 02/14] mbox: qcom: add APCS child device for QCS404

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Date:   Thu, 11 Jul 2019 07:44:24 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
Cc:     sboyd@...nel.org, david.brown@...aro.org, jassisinghbrar@...il.com,
        mark.rutland@....com, mturquette@...libre.com, robh+dt@...nel.org,
        will.deacon@....com, arnd@...db.de, horms+renesas@...ge.net.au,
        heiko@...ech.de, sibis@...eaurora.org,
        enric.balletbo@...labora.com, jagan@...rulasolutions.com,
        olof@...om.net, vkoul@...nel.org, niklas.cassel@...aro.org,
        georgi.djakov@...aro.org, amit.kucheria@...aro.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, khasim.mohammed@...aro.org
Subject: Re: [PATCH v3 02/14] mbox: qcom: add APCS child device for QCS404

On Tue 25 Jun 09:47 PDT 2019, Jorge Ramirez-Ortiz wrote:

> There is clock controller functionality in the APCS hardware block of
> qcs404 devices similar to msm8916.
> 
> Co-developed-by: Niklas Cassel <niklas.cassel@...aro.org>
> Signed-off-by: Niklas Cassel <niklas.cassel@...aro.org>
> Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
> ---
>  drivers/mailbox/qcom-apcs-ipc-mailbox.c | 18 ++++++++++--------
>  1 file changed, 10 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/mailbox/qcom-apcs-ipc-mailbox.c b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
> index 705e17a5479c..a05dc3aabac7 100644
> --- a/drivers/mailbox/qcom-apcs-ipc-mailbox.c
> +++ b/drivers/mailbox/qcom-apcs-ipc-mailbox.c
> @@ -89,16 +89,18 @@ static int qcom_apcs_ipc_probe(struct platform_device *pdev)
>  		return ret;
>  	}
>  
> -	if (of_device_is_compatible(np, "qcom,msm8916-apcs-kpss-global")) {
> -		apcs->clk = platform_device_register_data(&pdev->dev,
> -							  "qcom-apcs-msm8916-clk",
> -							  -1, NULL, 0);
> -		if (IS_ERR(apcs->clk))
> -			dev_err(&pdev->dev, "failed to register APCS clk\n");
> -	}
> -
>  	platform_set_drvdata(pdev, apcs);
>  
> +	if (!of_device_is_compatible(np, "qcom,msm8916-apcs-kpss-global") &&
> +	    !of_device_is_compatible(np, "qcom,qcs404-apcs-apps-global"))

If the remainder of the function was a long snippet I think this would
motivate the somewhat unusual early return. But I think it would be
cleaner to just add to the existing conditional.

Regards,
Bjorn

> +		return 0;
> +
> +	apcs->clk = platform_device_register_data(&pdev->dev,
> +						  "qcom-apcs-msm8916-clk",
> +						  -1, NULL, 0);
> +	if (IS_ERR(apcs->clk))
> +		dev_err(&pdev->dev, "failed to register APCS clk\n");
> +
>  	return 0;
>  }
>  
> -- 
> 2.21.0
>