From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f176.google.com (mail-oi1-f176.google.com [209.85.167.176]) (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 EDCF12EA480 for ; Sat, 9 May 2026 22:31:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.176 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778365870; cv=none; b=UOMQNAZunhNyxd86hXGYzxQJHlpD1Zx3pAU4lszple+8AO6RlyIXkp72C7n17K5oN8hnwh1jMNfXVSXRVf66+x3+is8SIROutjMI7bOtuN160x0wCSbHwekvT82UmswKN9dzHaHDuzykHTjGAwtabIn9sLTviy+WnMKJTMnguwI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778365870; c=relaxed/simple; bh=R8MHtyw3iUgVFaiy87HeuWdQOOUu7CPfgsXOVX8YVH8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=nv7nIv68+/3eEtCPyQ1CVidiURcgq/RGM0S1AA/UuG+ef/wN6X7p1a5prqa6bO7bebaw7U777kZ7WeO7jwmVFq0odCRI9dGSKNTMo94Ouy5LhmzJFrwr6eMXvJ8lLWDTFdpTrFxqldQ+Yrf2dSc9Swaj2DmPMQexfqhnEV/FqAQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com; spf=pass smtp.mailfrom=baylibre.com; dkim=pass (2048-bit key) header.d=baylibre-com.20251104.gappssmtp.com header.i=@baylibre-com.20251104.gappssmtp.com header.b=x4EOIbg0; arc=none smtp.client-ip=209.85.167.176 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=baylibre.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=baylibre.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=baylibre-com.20251104.gappssmtp.com header.i=@baylibre-com.20251104.gappssmtp.com header.b="x4EOIbg0" Received: by mail-oi1-f176.google.com with SMTP id 5614622812f47-47c6f914617so1599253b6e.1 for ; Sat, 09 May 2026 15:31:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=baylibre-com.20251104.gappssmtp.com; s=20251104; t=1778365868; x=1778970668; darn=vger.kernel.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=OOHQiWAMyC4vDuld0j5M/eJDZswBebyHXatCRNu2gCc=; b=x4EOIbg0hMWcmd5dZM7MB96+L2rJ+gmreyufR2L+xnijpfI0JZS9i97HqzmtYC9XzP dx/kYOPitMFrvKRH4948PeVhD/Ws7dhgYtMfwVZCWFN0KEuBFpE7U5NqvKU0Itdy0nnG lnlkykjOu5WBDFXdatiY42qCYr/cHcvcSkJrCbKrvrCeimGp5ymLQmoZ93IUg3bMWAe2 R+fJDJWF8sWAPkgovsQk4IGBue5y2O8YJwDJsi4zY36q3E24t1sxTTk0elHfGm746ofx ljxlKpwAUAPWxzqZGqc8CVadKc3v/YDuXYLFR4/x3LSbrqKpwzZFEivSGjHfJWhY/HPL /Arg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778365868; x=1778970668; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-gg:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=OOHQiWAMyC4vDuld0j5M/eJDZswBebyHXatCRNu2gCc=; b=P1uxIHC2Fi2hoA9DR2VK57AxFMbLoysEh9ajszV/ZQBdJvcb+yOF72Sqgjl27q6Anw H+nKHwHwrJI/UaO/E8sPFUtIUlFTBO/ZVzmXYd0l6vNrGcvwidahXnuYbAEDtNGWysRL /Vgxzlq/lqmWsYLfWPCFmIEzgZ6rtzjx3HAvPfOxcSI3VjXyXUvo3e7f+dyCZtH0XOvk IvmrYrmhzN/2g89l2HRDNMVzzYLoB6XgDo3v9pAibqRPcUcT5YgV5zIFx3B6TY7HaIED JZGqMXj8MpeKwxTF44XXQ2JgHbITIfMwyoHRVQlyzePFx4/rxLQAfr5lVksc9P6R4i3i NlmA== X-Forwarded-Encrypted: i=1; AFNElJ/ebpwfGDZNzek6q2ZCwlEuIm7v3eunUcV2vATN8R9QKTL63YxS/E+6go5AIGe8vosGeDivgA++GMbZ@vger.kernel.org X-Gm-Message-State: AOJu0Yz9oWpSGxZKiksDoci5RFNxAN4awdlmFJ2XjE2twFAwvf8Kv0PT la8iBgTrhinHE2Yg8U/dS4GUF3BiI35GeW1KRvxLc16R/F0xSnhtfPad7mh6PQcWQ3o= X-Gm-Gg: Acq92OHGMo8i5FhTWaYDdQU57mnAL1NcKfTa89DOQS7OfLhQcgRh2zH9u7Y6YHvXF61 q8NaG047yjmSWeSXaJW+IYDRx7uaWB/4JbhS4BDcwYnMzCgMcIwGWtyf2yb0qo3E2hyq4s/wcQ3 yjOXtzdwCHDnymdToKQ3v2EFVfrVxleBoF20wNvsz+ajQLyK9sJTeZJ3uFTSikiOkJyFByJVKT4 QPfIOxL8MQhIMbRR3iilGR+s7wezEqpZ/XjJ8EC7swlQmEsSrfAKro67ZezSYc7fT2a9zE3TJyC loZKyOAwbkdg3gIyyx4bCwhAqVVr8rOD9wGRgYCWhj2D4GHK0eShfTDn2oqp4kcqehnUtNqWYEb HSHGBiNHqpfladXKIrO6AEQaTyRdkrDn6b69cF4Oa1Phu8BzBfK+IPUNk1W+EvWNqICZwS5dkXe lOpj0kZFSz1netq5zI6Aub1hTXv7ppLhujhf7D35Q6XSZqFGmwPvyID7W9/hvwWjx923n0NGc= X-Received: by 2002:a05:6820:2206:b0:699:b131:d589 with SMTP id 006d021491bc7-69b36ad3840mr2252792eaf.3.1778365867934; Sat, 09 May 2026 15:31:07 -0700 (PDT) Received: from ?IPV6:2600:8803:e7e4:500:12a0:9178:ab4:39cc? ([2600:8803:e7e4:500:12a0:9178:ab4:39cc]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-69b25dc00acsm3226661eaf.10.2026.05.09.15.31.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 09 May 2026 15:31:06 -0700 (PDT) Message-ID: Date: Sat, 9 May 2026 17:31:03 -0500 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 RFC v4 00/10] AD9910 Direct Digital Synthesizer To: rodrigo.alencar@analog.com, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-hardening@vger.kernel.org Cc: Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Philipp Zabel , Jonathan Corbet , Shuah Khan , Kees Cook , "Gustavo A. R. Silva" References: <20260508-ad9910-iio-driver-v4-0-d26bfd20ee3d@analog.com> Content-Language: en-US From: David Lechner In-Reply-To: <20260508-ad9910-iio-driver-v4-0-d26bfd20ee3d@analog.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/8/26 12:00 PM, Rodrigo Alencar via B4 Relay wrote: > This patch series adds support for the Analog Devices AD9910 DDS. > This is a RFC so that we can agree/discuss on the design that follows: > > This is a follow-up of the V3 discussion. For V1, we reached into > this channel composition agreement where physical channels may have > sub-channels. That adds the flexibility necessary for this design. > During V2, some feedback indicated that the ABI is too device-specific, > so DRG/RAM destination and operating modes are configured through > alternate paths and profile channels are created. In V3, there was > further discussion on the ABI and on mode priority debug. > What happened with the idea of adding a new attribute to show the relationship of the sub-channels to the actual physical output channels?