linux-kernel - Re: [PATCH v2 1/2] ARM: msm8960: Rename cxo

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Message-ID: <YvQMyQLohqcc8Fug@ripper>
Date:   Wed, 10 Aug 2022 12:53:45 -0700
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Rudraksha Gupta <guptarud@...il.com>
Cc:     agross@...nel.org, david@...t.cz, devicetree@...r.kernel.org,
        krzysztof.kozlowski+dt@...aro.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org
Subject: Re: [PATCH v2 1/2] ARM: msm8960: Rename cxo_board to cxo-board and
 add alias

On Mon 08 Aug 17:02 PDT 2022, Rudraksha Gupta wrote:

> This patch renames cxo_board to be up to date with the current naming
> style. It also adds an alias.
> 
> Signed-off-by: Rudraksha Gupta <guptarud@...il.com>
> ---
> v2:
>  - Group the correct changes together
> 
>  arch/arm/boot/dts/qcom-msm8960.dtsi | 2 +-
>  drivers/clk/qcom/gcc-msm8960.c      | 2 +-

Clock and dts patches goes through two different paths towards mainline,
so they should be separated.

>  2 files changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/qcom-msm8960.dtsi b/arch/arm/boot/dts/qcom-msm8960.dtsi
> index 0e099aa7c889..2ed969785b78 100644
> --- a/arch/arm/boot/dts/qcom-msm8960.dtsi
> +++ b/arch/arm/boot/dts/qcom-msm8960.dtsi
> @@ -58,7 +58,7 @@ cpu-pmu {
>  	};
>  
>  	clocks {
> -		cxo_board {
> +		cxo_board: cxo-board {
>  			compatible = "fixed-clock";
>  			#clock-cells = <0>;
>  			clock-frequency = <19200000>;
> diff --git a/drivers/clk/qcom/gcc-msm8960.c b/drivers/clk/qcom/gcc-msm8960.c
> index 051745ef99c8..56ce05a846dd 100644
> --- a/drivers/clk/qcom/gcc-msm8960.c
> +++ b/drivers/clk/qcom/gcc-msm8960.c
> @@ -3624,7 +3624,7 @@ static int gcc_msm8960_probe(struct platform_device *pdev)
>  	if (!match)
>  		return -EINVAL;
>  
> -	ret = qcom_cc_register_board_clk(dev, "cxo_board", "cxo", 19200000);
> +	ret = qcom_cc_register_board_clk(dev, "cxo-board", "cxo", 19200000);

This breaks compatibility with existing DTB files.

What you probably want is to make sure that any clocks with parent name
of "cxo", should have a .fw_name = "cxo", then you can make a
phandle-based reference in DT and these global names doesn't matter (and
in the end we can remove this board_clk from the driver).

Regards,
Bjorn

>  	if (ret)
>  		return ret;
>  
> -- 
> 2.25.1
>