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([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: linux-kernel@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?