From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wr1-f50.google.com (mail-wr1-f50.google.com [209.85.221.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 957F32FD1B6 for ; Fri, 21 Nov 2025 19:39:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.50 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763753991; cv=none; b=r9ted2s9clx9QnEJ7gFAZA39caC9ZiI1grGHv1becM43ZyMsHFpI4/ija0SmGCy3en/gUSEdrLlcTxq+hJi6lJ2K+hY+QvzlLKciCd8eqhyM53tAcd68phZV+uVxEwQz9yI/RFdF4fadX5bl4ldvjxCG269CxozrmkXooeD/fbA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763753991; c=relaxed/simple; bh=/ORdsN9to51TeOs1BjW1wgj0a85OPhpdeTHQwv/1q2A=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Z0LYzAkj08ncwNw+LWj9iZ5RsvFGaSdZ/2N2Y3rblMUwUMBJmhwrhKwJmhbWfiyz4OpdzerPf2Zh5KkhL4Iz3dqHJ4Kg12j157wSl+7G5rZOC+EM+APJh052Nf8mvQLDzIV6+n72/iyPIJaX8vyJk9qJFzwRwo/+1lHes0sGJiI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=MPnUvd+g; arc=none smtp.client-ip=209.85.221.50 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="MPnUvd+g" Received: by mail-wr1-f50.google.com with SMTP id ffacd0b85a97d-429cbdab700so286053f8f.1 for ; Fri, 21 Nov 2025 11:39:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1763753987; x=1764358787; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=DGqbZP8+hvf7xeF3jbLslaQnJSoADTEWG1GIF5MUBRo=; b=MPnUvd+gTqEHKRS5dVAbX3j6bnHM7VXaeHq+8QzaGG8uWtQaKaF5o/qiQo8NjI59Q1 3+wzKNW12jOdEUYDY55duhTp4GCT3F+bO4JpE4fIDt16JU/Z1wpsBlJWwIXSADHUzRYD HQls7BQC8ebXgEy+xq8Bcxnt8HKrV5TL1lgPSiSDIBSoqmc1OA+u4hJhlGV3diUvZ9JM kZq6RqVuQo1UyDtNYS3dai/j4Bpq0UyJZ3MhXlE3sIsQO5nHPYEcukhnHVakiTqbKiww wzxQl5yQkZa83S8MFkts5uYB0+hm2FxyyAXs8BwbEMGdnVPlmFH3VVq9sNymBY29xII1 2vEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763753987; x=1764358787; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-gg:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=DGqbZP8+hvf7xeF3jbLslaQnJSoADTEWG1GIF5MUBRo=; b=j9VUKH0VOANYA/bSQjXTXRmeXVu5HOYSQgEWTaRZz1nj/loK7NtKGmdQ2AeswoYrGz h4+GumETXfJ13YheTg2s7z6muUEjaQDFYKw3H6QVeeGtK5OVaTB3mKOfMHh5Mqq/3Z0C hnimdp5GQ4+RD3S9amAuEyEpaJ47/oaSF7gFw1Pg9iSbp1WKvQUDZEfXjM+RYVsTTkga Btoj4t+QbzYwV9nJPZeJURtQoVlZekHwdeVM0YlukjuZvtX6F1OF/xHLI0ZFQF91FN50 mYYEAQARfm2ayKa9QeUrPxDMD3F+W0X5NWaNYRfzS1Gd0eYY2L6YcGBfBJAeaQqpURCn 79aQ== X-Forwarded-Encrypted: i=1; AJvYcCXlRUI83sNr6GixR5msN6XmrvHkSJth7HGNhcAa96rDii0QeTDBEIJnADu5BeLuHsTedNOWo5I629hxnro=@vger.kernel.org X-Gm-Message-State: AOJu0YzvnG0pyMYQZm3V4Wd+y4ad+zV+8VFZEDNxlg+rffP5n6okeUyB QzQOTep8uGF9T+RZoV0/Kxr7vSF3b57dR3/NbeqvoVyvnPg1JuVEiwd8 X-Gm-Gg: ASbGncuCx1lrRjLhDSApdlHanIvePPkpiWHmnSDC+t2kR3fqN85ijL9pqHMxCBMjbHC 2PX7YXTSWGC7tIrdBEjuoLjYgPPRVe0vAOI+kTK4FCU0wt2NGIA6BmlSBNe/+AYlBh/+8GzbTtu xdJ6nme2kv4tgGglYHZ7/Syz6EAOTXHfeQQrrgJOCcXeJLcXbg5z54aKqaew5bjaAOOFQX5pfNn 57qEMuwqbNh9sCl78yltvWBt1p7cjjmQ6WSeLSNu4vc0oyF6u96jCziCbv+eRrtT9ph9YR82a9c 0zig84QgsFtLBfemgm2MksED7eWrcrPuh9vbiB3ZgAyUFd0eHC/GpdKf+a1n2LWT8/KqYdc4bi2 jZ3wG2ILVqm/VTm5Dxi6X6kNUzRZFnfB/AaVKOyr8iPTyIQUOm8aTdbf7VRVcbziIWAI4h6QnOU 4aKyQ= X-Google-Smtp-Source: AGHT+IENFs6ZeqSSU+KjG9QyVSgBwvU+cDVIGAR8OjDvX7BWestdMZ6UnPS0+COQ/ad/NdSX8SYyYw== X-Received: by 2002:a05:600c:3b96:b0:477:a6f1:499d with SMTP id 5b1f17b1804b1-477c315f86bmr17005775e9.3.1763753986770; Fri, 21 Nov 2025 11:39:46 -0800 (PST) Received: from skbuf ([2a02:2f04:d106:d600:b19f:2efa:e88a:a382]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-477bf1df3d5sm59104335e9.2.2025.11.21.11.39.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Nov 2025 11:39:46 -0800 (PST) Date: Fri, 21 Nov 2025 21:39:42 +0200 From: Vladimir Oltean To: Prabhakar Cc: =?utf-8?B?Q2zDqW1lbnQgTMOpZ2Vy?= , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Simon Horman , Philipp Zabel , Russell King , Geert Uytterhoeven , Magnus Damm , linux-renesas-soc@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Biju Das , Fabrizio Castro , Lad Prabhakar Subject: Re: [PATCH net-next 06/11] net: dsa: rzn1-a5psw: Add support for optional timestamp clock Message-ID: <20251121193942.gsogugfoa6nafwzf@skbuf> References: <20251121113553.2955854-1-prabhakar.mahadev-lad.rj@bp.renesas.com> <20251121113553.2955854-1-prabhakar.mahadev-lad.rj@bp.renesas.com> <20251121113553.2955854-7-prabhakar.mahadev-lad.rj@bp.renesas.com> <20251121113553.2955854-7-prabhakar.mahadev-lad.rj@bp.renesas.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251121113553.2955854-7-prabhakar.mahadev-lad.rj@bp.renesas.com> <20251121113553.2955854-7-prabhakar.mahadev-lad.rj@bp.renesas.com> On Fri, Nov 21, 2025 at 11:35:32AM +0000, Prabhakar wrote: > From: Lad Prabhakar > > Add support for an optional "ts" (timestamp) clock to the RZN1 A5PSW > driver. Some SoC variants provide a dedicated clock source for > timestamping or time synchronization features within the Ethernet > switch IP. > > Request and enable this clock during probe if defined in the device tree. > If the clock is not present, the driver continues to operate normally. > > This change prepares the driver for Renesas RZ/T2H and RZ/N2H SoCs, where > the Ethernet switch includes a timestamp clock input. > > Signed-off-by: Lad Prabhakar > --- What is the impact to the current driver if you get the clock and disable it? I'm trying to understand if it's possible to only enable it when using a feature that requires it.