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 949173FE7; Tue, 19 Aug 2025 06:39:46 +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=1755585586; cv=none; b=maqXhyUfW4kx6FzCs327AcQWdgRMJTJODlG2LM+W937G5ZtCML+WEEBMDcJqFUhWfXvfdb7HbaUbZQUpJOMJIAPx52OrFDgdyPstnpH3RAvILRtkz0XlLJ4Fp9TkKL8eKn2lWfpmDSmJCqdirw1FRgOUcpt1lysNSWdh9ypawd8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755585586; c=relaxed/simple; bh=5TdbgDMcTMoYx896jp5mrGxDjLrmQ8N8B6xExaeAz9g=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=UUCOtp72AM3yCAOVei90zwlKzMBtVsnslpdLvneHcEYeKygvbMc9maxUBSUPqD5JFj1P2usQOmNv2GrlXC2gW+iwV23lvnyewKyWM+VlUAAkmCb8ZdrMJcYBoRS84wKsIpaj1M87lhJYiZblwJ2gjufaFYAc+X5DjEQ63fvN5XU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nP5vVfov; 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="nP5vVfov" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2E0E1C4CEF4; Tue, 19 Aug 2025 06:39:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1755585586; bh=5TdbgDMcTMoYx896jp5mrGxDjLrmQ8N8B6xExaeAz9g=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=nP5vVfovPeiETnUhWL+gGPhzQZIp44Za85cLnr7UI7eZwRxbMPsK6krbj/7NbwKbh WjZkCwKVcW+KgbQ+F3Vz89dtJ9za/ggHxfafHGXdZpX7n/sN8Way1b+U+NnLRG6RZO JZ6h4Wu9Sp5NoGwichareey4LkgrVvQJi+1uRgCP37PkO9Joy/Ue3FBVdhEeloiJyP 7VXyl55A3OxGttHnGTDiDlIH0KzU3qo6Z69WnLFV0zc+H2B6BBkefIkN9iS2CIFuLY q/BJwR4WdIfFeOEl0PqriLsHIj9LeCgeEVl17ckaM+lUsH/GQ5eoOt7Xosre+79to+ /wrD4872LsO/g== Message-ID: <41ad5dc8-0179-49b7-a660-2c55b5048db6@kernel.org> Date: Tue, 19 Aug 2025 08:39:41 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/4] dt-bindings: iio: adc: ad7768-1: add new supported parts To: 20250816141220.0dd8d68f@jic23-huawei, Jonathan Cameron 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 References: <8c27b00c-5b80-400f-8538-b9ad96fd5feb@kernel.org> <20250816141220.0dd8d68f@jic23-huawei> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 18/08/2025 23:04, Jonathan Santos wrote: > On 08/16, Jonathan Cameron wrote: >> 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. >> > > Yes, it would be, but the here it is 1000x larger than the > actual value (1/1000 V/V). I don't see another unit in Huh? How? 1000x larger would be = 1... This makes no sense... > property-units.yaml for this specifc case. Maybe using -milli suffix > like in 'adi,ad4000.yaml' and 'adi,ad7380.yaml'? Best regards, Krzysztof