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 79F2B23A562; Sat, 16 Aug 2025 13:12:30 +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=1755349950; cv=none; b=FwKEDBodr85T93rRi2/JqcNFvwAC9cdpoPOMauG84XeYj0EExzk7OSgpQI8G5YYG6hb00M0nOCdu64eIpAQvsPsSs1C9SMJarghbj9lX2BKJWeEMPXQJ2xDjUIegyDpvlxyUDQ+9egis8hRQS/w798dMrUXG+oMJ0NgPKVNxlPg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755349950; c=relaxed/simple; bh=T0ihUu05oB0idqYsW4ppls0Ccy84ClVeS8cutf1iMJw=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=D8eYDkmxrGqSzKWOoQ5qXCsXHXYv2lCQVrohB6HIyBvFl2lQqiJDhmJcITj+tWKj7VTmxeKNBir9a2HeviR2GfLA+vXpw42mSNSCp8HfslYpk9ftUBQWo66HesXMcB2itj+9URVhnsgwS1OG+ZGo58HAY3RRjRDnASCmygBaQ4k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fLdLj3pV; 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="fLdLj3pV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CDC68C4CEEF; Sat, 16 Aug 2025 13:12:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755349950; bh=T0ihUu05oB0idqYsW4ppls0Ccy84ClVeS8cutf1iMJw=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=fLdLj3pVC2liA2pM+LgfBMrAYou3OYlJ6bKUpA94Lwn1vQfIzPXwHJt+0smyFtxFB nBI8FHnhdod6JIo0YLjFot69M+j9Md2fuacttWVSugJNVkdvXDwW9WX8lDc/WGorJ+ H4RL57YpIucgMV++PMBv5+f1N06hMYXjgmIX70KRtxHe0pNmB1EhRiHsNbg9/MKGby L+1tNTty579ZHXXxe/HRghrT3FC8DocspI1Vzon3KFWed5Mbiv8UX/qGch8Dro62xz +aFAuTuHV5a1IJhkR55mBydlVaUVR6hrtxTuHdlm6hOpTSTYYyxDKKXG/1sp3yEBwe GzjFjfY/pxylQ== Date: Sat, 16 Aug 2025 14:12:20 +0100 From: Jonathan Cameron To: Krzysztof Kozlowski Cc: Jonathan Santos , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Michael.Hennerich@analog.com, dlechner@baylibre.com, nuno.sa@analog.com, andy@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Subject: Re: [PATCH 1/4] dt-bindings: iio: adc: ad7768-1: add new supported parts Message-ID: <20250816141220.0dd8d68f@jic23-huawei> In-Reply-To: <8c27b00c-5b80-400f-8538-b9ad96fd5feb@kernel.org> References: <8c27b00c-5b80-400f-8538-b9ad96fd5feb@kernel.org> X-Mailer: Claws Mail 4.3.1 (GTK 3.24.49; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: devicetree@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, 14 Aug 2025 08:03:23 +0200 Krzysztof Kozlowski wrote: > On 14/08/2025 00:39, Jonathan Santos wrote: > >>> > >>> + adi,aaf-gain: > >>> + description: | > >>> + Specifies the gain of the Analog Anti-Aliasing Filter (AAF) applied to the > >>> + ADC input, measured in milli-units. The AAF provides additional signal > >> > >> What is milli unit? Isn't gain in dB, so maybe you want mB? Quite > >> unpopular to see mB, but we cannot use 1/100 of dB, so I could > >> understand it. > >> > > > > Actually, the gain is expressed in V/V, not in dB. I may have phrased it poorly, but since > > there are fractional values like 0.364 and 0.143, I chose to represent it > > in milli-units. > > Why your reply to is corrupted: > "c3cf9b97-3883-4ebb-a2ed-0033adebda87@kernel.org"? > > > What sort of unit is milli-unit? Isn't this 1/1000 of some BASE unit, > but you do not have here a base? > > I think you want just basis point if this is V/V (already in common > property suffixes) Nice. I didn't know about -bp. That does sound like a good choice for ratio stuff and here would be 100x larger actual values which is fine. > > Best regards, > Krzysztof >