From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0009B304BC4; Thu, 4 Sep 2025 13:37:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756993075; cv=none; b=a8Y2Z7guLK2Y7StrOllFaWFjP2e3NmYJcAJRutPUIce8vSZPN+98V2QbPxYfztOEI7unTik3Dst5n8XmwO7coy5+lsWa1sr8zXT/JbsET+OkpNyJHBeqCOmg5kOm8/frpR+RqQAmtqri/r2UQJYZtej98RKq5+n7U4lEH8RrZRI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756993075; c=relaxed/simple; bh=IZYPvmhp4Lu67EYKMyAIk7sdK71xXGH4/n1ufrRtfgU=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=cGVFxp/KUKhh7VaaMod/R7C4iG92T6dtLUU8RmvFA7Znd4w4oPJMtrjZvXoFDzDT7BpUNBO3+tE11GohsFTkdOX1MlfDw4rwhzImv+MluI900d2EA9NqtJ6Uibk99E/a2Ez/dZqdaf+fm46pm1ggDRgvuGnxb4DTYPJ9cVxnxVk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NLmzmxUP; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NLmzmxUP" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D530CC4CEF0; Thu, 4 Sep 2025 13:37:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1756993074; bh=IZYPvmhp4Lu67EYKMyAIk7sdK71xXGH4/n1ufrRtfgU=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=NLmzmxUPhrUNM/sfjImKJAHD31D8b9GHAc1ioUIZLX12iEeXiOAZOHok9OBF3Fxiq /atb96duOLqQMAa7f/7zFPzpRTmGmiYC5mv8uI4IW7lJMKvFu0BTqDW55qhDwkg842 kCjXJrDGNNKTKwUX9NMf6XtG43LxmCYvSgk6U+Q+YUf6mNYWGC0h7glxQkPJ20LbxP YCM5nR0eS7r0XI1J4AtBkwyGsLQkYDWg+NSuzU5bmsmAgu9WqjYgMC+GHpcE5BoI1F 8zGtHZHYCtWwbBGd+12NQqWYZIk4Y5GJwFJwntobpugQuXr9tfN2Mt8uV/7LjNXzh6 ii9GmFTlCfbQg== Date: Thu, 4 Sep 2025 06:37:52 -0700 From: Jakub Kicinski To: Richard Cochran Cc: Wei Fang , "andrew+netdev@lunn.ch" , "davem@davemloft.net" , "edumazet@google.com" , "pabeni@redhat.com" , Vladimir Oltean , Clark Wang , Frank Li , "Y.B. Lu" , "christophe.leroy@csgroup.eu" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" , "imx@lists.linux.dev" Subject: Re: [PATCH net-next 0/3] ptp: add pulse signal loopback support for debugging Message-ID: <20250904063752.3183d523@kernel.org> In-Reply-To: References: <20250903083749.1388583-1-wei.fang@nxp.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Thu, 4 Sep 2025 06:05:02 -0700 Richard Cochran wrote: > On Thu, Sep 04, 2025 at 01:55:43AM +0000, Wei Fang wrote: > > Vladimir helped explain its purpose in the thread, do you still think > > it is pointless? > > Vladimir gave practical examples for the use case, so no objection > from my side. I just wanted to understand how this is useful. > > Next time, it would be helpful to have that info in the cover letter. +1, let's get it reposted with updated cover letter. I'm tempted to ask for a description under Documentation/, tho, I'm not 100% clear whether authors expect users or driver developers to exercise the loop. Maybe such distinction doesn't even makes sense for embedded devices..