linux-kernel - Re: [PATCH v2 02/23] dt-bindings: clock: tegra30: Add IDs for CSI pad clocks

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Message-ID: <d4b0a933-a623-4a67-8898-d7c35604bb16@kernel.org>
Date: Sun, 7 Sep 2025 20:25:42 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Svyatoslav Ryhel <clamor95@...il.com>
Cc: Thierry Reding <thierry.reding@...il.com>,
 Thierry Reding <treding@...dia.com>, Mikko Perttunen
 <mperttunen@...dia.com>, Jonathan Hunter <jonathanh@...dia.com>,
 Sowjanya Komatineni <skomatineni@...dia.com>,
 Luca Ceresoli <luca.ceresoli@...tlin.com>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Prashant Gaikwad <pgaikwad@...dia.com>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Mauro Carvalho Chehab <mchehab@...nel.org>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Dmitry Osipenko <digetx@...il.com>, Jonas Schwöbel
 <jonasschwoebel@...oo.de>, Charan Pedumuru <charan.pedumuru@...il.com>,
 dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
 linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-media@...r.kernel.org, linux-clk@...r.kernel.org,
 linux-staging@...ts.linux.dev
Subject: Re: [PATCH v2 02/23] dt-bindings: clock: tegra30: Add IDs for CSI pad
 clocks

On 07/09/2025 11:43, Svyatoslav Ryhel wrote:
> нд, 7 вер. 2025 р. о 12:34 Krzysztof Kozlowski <krzk@...nel.org> пише:
>>
>> On Sat, Sep 06, 2025 at 04:53:23PM +0300, Svyatoslav Ryhel wrote:
>>> Tegra30 has CSI pad clock enable bits embedded into PLLD/PLLD2 registers.
>>> Add ids for these clocks. Additionally, move TEGRA30_CLK_CLK_MAX into
>>> clk-tegra30 source.
>>>
>>> Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
>>> ---
>>>  drivers/clk/tegra/clk-tegra30.c         | 1 +
>>>  include/dt-bindings/clock/tegra30-car.h | 3 ++-
>>>  2 files changed, 3 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/clk/tegra/clk-tegra30.c b/drivers/clk/tegra/clk-tegra30.c
>>> index ca367184e185..ca738bc64615 100644
>>> --- a/drivers/clk/tegra/clk-tegra30.c
>>> +++ b/drivers/clk/tegra/clk-tegra30.c
>>> @@ -53,6 +53,7 @@
>>>  #define SYSTEM_CLK_RATE 0x030
>>>
>>>  #define TEGRA30_CLK_PERIPH_BANKS     5
>>> +#define TEGRA30_CLK_CLK_MAX          311
>>
>> Unused define drop.
>>
> 
> Specify, your comment is not clear.
> 
>> Also, don't mix bindings and drivers. You cannot create such
>> dependencies.
> 
> I literally did what you told me to do! TEGRA30_CLK_CLK_MAX was
> removed from binding, but it is used by the driver, so how you propose


I missed that you remove here old CLK_MAX... well, you did it quite
different than all other cases leading to driver-binding dependency.
Really, I thought you will just fix it immediately after my feedback and
then new bindings come later, just like we did for every other SoC.

> to handle this without redefining TEGRA30_CLK_CLK_MAX and breaking
> build with missing TEGRA30_CLK_CLK_MAX?
There is really no problem there and if you put here at least some
effort you would see how everyone else did it - add define to the driver
in cleanup series, month ago or so and then change bindings.

Fine to do it that way

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>



Best regards,
Krzysztof