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([2600:8803:e7e4:500:9458:d356:778c:22ac]) by smtp.gmail.com with ESMTPSA id 5614622812f47-4875ddd98e8sm7060538b6e.6.2026.06.17.15.46.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 17 Jun 2026 15:46:57 -0700 (PDT) Message-ID: Date: Wed, 17 Jun 2026 17:46:56 -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 v3 0/5] iio: adc: Add support for LTC2378 and similar ADCs To: Marcelo Schmitt , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: jic23@kernel.org, nuno.sa@analog.com, Michael.Hennerich@analog.com, andy@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, pop.ioan-daniel@analog.com, marcelo.schmitt1@gmail.com References: Content-Language: en-US From: David Lechner In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 6/16/26 9:02 PM, Marcelo Schmitt wrote: > This patch series adds support for LTC2378 and similar low noise, low power, > high speed, successive approximation register (SAR) ADCs. These ADCs are similar > among each other, varying mainly on the amount of precision bits, maximum sample > rate, and input configuration (either fully differential or pseudo-differential). > > The first patch adds device tree documentation for LTC2378. > > The second patch enables single-shot sample read with a GPIO connected > to the LTC2378 CNV pin. > > The third patch extends IIO DMAengine buffer interface to make > sampling_frequency and sampling_frequency_available buffer attributes. > > The fourth patch enables high-speed data captures with SPI offloading. > The setup is similar to AD4030, with a specialized PWM generator being used both > for SPI offload triggering and conversion start signaling. > > The last support patch enables running buffered data captures without SPI offloading. > > Even though these parts are somewhat similar to AD4000, the wiring configuration > for LTC parts is different as well as the available HDL for high speed sample > rate mode. Because of that, I propose creating a new device driver for > supporting LTC2378-like devices. > > Specifications can be found at: > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/233818fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/236416fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/236418f.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/236716fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/236718f.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/236816f.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/236818f.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/236918fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237016fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237616fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237618fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237620fb.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237716fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237718fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237720fb.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237816fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237818fa.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237820fb.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/237918fb.pdf > Link: https://www.analog.com/media/en/technical-documentation/data-sheets/238016fb.pdf Putting `Link:` tags like this in the cover letter will cause b4 to apply all of these to all patches in the series, so we don't want to do that. I think it is enough that they are already in the code, we don't need to list them again here.