linux-kernel - Re: [PATCH v3 02/16] dt-bindings: display: sprd: use more descriptive clock names

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Message-ID: <175424005938.523766.7181495703090197785.robh@kernel.org>
Date: Sun, 3 Aug 2025 11:54:19 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Otto Pflüger <otto.pflueger@...cue.de>
Cc: Orson Zhai <orsonzhai@...il.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Chunyan Zhang <zhang.lyra@...il.com>,
	Kevin Tang <kevin3.tang@...il.com>, dri-devel@...ts.freedesktop.org,
	devicetree@...r.kernel.org,
	Baolin Wang <baolin.wang@...ux.alibaba.com>,
	Simona Vetter <simona@...ll.ch>, linux-kernel@...r.kernel.org,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Conor Dooley <conor+dt@...nel.org>,
	Liviu Dudau <Liviu.Dudau@....com>, David Airlie <airlied@...il.com>,
	Russell King <rmk+kernel@....linux.org.uk>,
	Kevin Tang <kevin.tang@...soc.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>, Eric Anholt <eric@...olt.net>
Subject: Re: [PATCH v3 02/16] dt-bindings: display: sprd: use more
 descriptive clock names


On Thu, 31 Jul 2025 17:51:15 +0200, Otto Pflüger wrote:
> Introduce new clock names that actually describe what the clock input is
> used for instead of referring to a specific clock source.
> 
> The new clock input names are based on information from clock drivers
> such as drivers/clk/sprd/ums512-clk.c. The 128M clock appears to be
> CLK_DISPC0_DPI, the clock used for the DPI output from the DPU, while
> the 384M clock is CLK_DISPC0, the actual DPU core clock. The DSI
> controller's 96M clock is most likely CLK_DSI_APB, the APB clock used
> for accessing its control registers.
> 
> Since it seems possible to configure different frequencies for these
> clocks, the old bindings do not even accurately describe the hardware.
> Deprecate the old clock names.
> 
> Signed-off-by: Otto Pflüger <otto.pflueger@...cue.de>
> ---
>  .../bindings/display/sprd/sprd,sharkl3-dpu.yaml         | 17 +++++++++++------
>  .../bindings/display/sprd/sprd,sharkl3-dsi-host.yaml    | 11 ++++++++---
>  2 files changed, 19 insertions(+), 9 deletions(-)
> 

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>