linux-kernel - Re: [PATCH can-next] dt-bindings: can: tcan4x5x: add missing required clock-names

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Message-ID: <pl22u3ybv3ibnpzmgiskppz56vlvqhlz25h7s5ewunkks6ywtn@v6lgln7s536w>
Date: Wed, 27 Nov 2024 16:56:12 +0100
From: Sean Nyekjaer <sean@...nix.com>
To: Conor Dooley <conor@...nel.org>
Cc: Marc Kleine-Budde <mkl@...gutronix.de>, 
	Vincent Mailhol <mailhol.vincent@...adoo.fr>, Andrew Lunn <andrew+netdev@...n.ch>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, linux-can@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH can-next] dt-bindings: can: tcan4x5x: add missing
 required clock-names

Hi Conor,

On Wed, Nov 27, 2024 at 03:50:30PM +0100, Conor Dooley wrote:
> On Wed, Nov 27, 2024 at 02:40:47PM +0100, Sean Nyekjaer wrote:
> > tcan4x5x requires an external clock called cclk, add it here.
> 
> That's not what this patch is doing, the clock input is already there,
> so I don't know what this patch actually accomplishes? clock-names isn't
> a required property, so you can't even use it in a driver.
> 

Thanks for asking the right questions :)

I know the clock input is there, but it looks (to me) like the driver looks for the
specific clock called cclk:
https://elixir.bootlin.com/linux/v6.12/source/drivers/net/can/m_can/m_can.c#L2299
https://elixir.bootlin.com/linux/v6.12/source/drivers/net/can/m_can/tcan4x5x-core.c#L396

Br,
/Sean