Thread (15 messages) 15 messages, 3 authors, 2025-06-27

Re: [PATCH v12 1/7] dt-bindings: serial: Added secondary clock for RZ/T2H RSCI

From: "Lad, Prabhakar" <prabhakar.csengg@gmail.com>
Date: 2025-06-27 12:57:14
Also in: linux-arm-kernel, linux-renesas-soc, linux-serial, lkml

Hi Rob,

On Fri, Jun 27, 2025 at 12:09 AM Rob Herring [off-list ref] wrote:
On Tue, Jun 17, 2025 at 02:44:58PM +0100, Prabhakar wrote:
quoted
From: Thierry Bultel <redacted>

At boot, the default clock is the PCLKM core clock (synchronous
clock, which is enabled by the bootloader).
For different baudrates, the asynchronous clock input must be used.
Clock selection is made by an internal register of RCSI.

Add the optional "sck", external clock input.

Also remove the unneeded serial0 alias from the dts example.

Signed-off-by: Thierry Bultel <redacted>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
Hi Rob,
As mentioned in the thread [1] below there are no users of the RSCI binding
hence this change doesn not break any ABI.

[1] https://lore.kernel.org/all/CAMuHMdUThuWxxznhjvcn5cOFCWOkb5u-fRYwTOoenDRY=4H6FA@mail.gmail.com/ (local)
Please state this in the commit message. If you want to break the ABI
you have to say that you are and why it is okay.
Sure, I'll update the commit message and send a new version.

Cheers,
Prabhakar
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