linux-kernel - Re: [PATCH v5 03/12] clk: qcom: gcc-sm6375: Unregister critical clocks

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Message-ID: <ZZZt1fV9WYJ6P-xE@hovoldconsulting.com>
Date: Thu, 4 Jan 2024 09:35:33 +0100
From: Johan Hovold <johan@...nel.org>
To: Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: Bjorn Andersson <andersson@...nel.org>, Andy Gross <agross@...nel.org>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v5 03/12] clk: qcom: gcc-sm6375: Unregister critical
 clocks

On Wed, Jan 03, 2024 at 02:36:01PM +0100, Konrad Dybcio wrote:
> Some clocks need to be always-on, but we don't really do anything
> with them, other than calling enable() once and telling Linux they're
> enabled.
> 
> Unregister them to save a couple of bytes and, perhaps more
> importantly, allow for runtime suspend of the clock controller device,
> as CLK_IS_CRITICAL prevents the latter.
> 
> Signed-off-by: Konrad Dybcio <konrad.dybcio@...aro.org>

> @@ -3886,6 +3797,11 @@ static int gcc_sm6375_probe(struct platform_device *pdev)
>  	qcom_branch_set_clk_en(regmap, 0x17028); /* GCC_CAMERA_XO_CLK */
>  	qcom_branch_set_clk_en(regmap, 0x2b004); /* GCC_CPUSS_GNOC_CLK */
>  	qcom_branch_set_clk_en(regmap, 0x1702c); /* GCC_DISP_XO_CLK */
> +	qcom_branch_set_clk_en(regmap, 0x17008); /* GCC_CAMERA_AHB_CLK */
> +	qcom_branch_set_clk_en(regmap, 0x1700c); /* GCC_DISP_AHB_CLK */
> +	qcom_branch_set_clk_en(regmap, 0x36004); /* GCC_GPU_CFG_AHB_CLK */
> +	qcom_branch_set_clk_en(regmap, 0x79004); /* GCC_SYS_NOC_CPUSS_AHB_CLK */
> +	qcom_branch_set_clk_en(regmap, 0x17004); /* GCC_VIDEO_AHB_CLK */

Shouldn't you keep the above sorted by offset or at least try to group
them by subsystem (e.g. keep the camera clocks together)?

Johan