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([2405:201:6803:38cc:eb35:b786:98be:f27d]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-771e814cbbasm2930206b3a.36.2025.08.25.14.25.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Aug 2025 14:25:11 -0700 (PDT) From: Abhinav Jain To: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: lars@metafoo.de, Michael.Hennerich@analog.com, alexandru.ardelean@analog.com, jlc23@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, Marcelo.Schmitt@analog.com, dumitru.ceclan@analog.com, Jonathan.Santos@analog.com, dragos.bogdan@analog.com, Abhinav Jain Subject: [PATCH v1 0/2] Add MAX22530-MAX22532 ADC Support Date: Tue, 26 Aug 2025 02:54:50 +0530 Message-Id: X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-iio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Hello iio/maintainers, This patch series adds initial support for the Analog Devices Maxim family of MAX22530-MAX22532 ADCs. These are galvanically isolated, 4-channel, multiplexed, 12-bit, analog-to-digital converters (ADC) in the MAXSafe™ family product line. An integrated, isolated, DC-DC converter powers all fieldside circuitry, and this allows field-side diagnostics even when no input signal is present. The first patch adds the device tree documentation for the ADC. The DT binding has been verified with DT_BINDING_CHECK. The second patch adds the read functionality for raw and average ADC values from registers. The code was tested with Raspberry Pi5 and MAX22531_EVKIT_A. With the current driver version, it is possible to do single-shot read of ADC sample data. On a preliminary version of the max22531 driver with debugfs_reg_access callbacks, it was also possible to read/write from/to different device registers and obtain the expected results. Details of the test setup can be found at https://wiki.analog.com/resources/tools-software/linux-drivers/iio-adc/max22531 This code was developed as part of the GSoC project for Linux Foundation. Many thanks to my mentors Marcelo Schmitt, Ceclan Dumitru, Jonathan Santos & Dragos Bogdan for their guidance and reviews throughout the course of this programme. Abhinav Jain (2): dt-bindings: iio: adc: Add device tree binding for MAX22531 ADC iio: adc: Add initial support for MAX22531 ADC .../bindings/iio/adc/adi,max22531.yaml | 75 +++++++ MAINTAINERS | 8 + drivers/iio/adc/Kconfig | 10 + drivers/iio/adc/Makefile | 1 + drivers/iio/adc/max22531.c | 191 ++++++++++++++++++ 5 files changed, 285 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,max22531.yaml create mode 100644 drivers/iio/adc/max22531.c base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494 -- 2.34.1