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Thu, 28 May 2026 11:03:24 -0400 From: Marcelo Schmitt To: , , CC: , , , , , , , , , Subject: [PATCH v2 1/4] dt-bindings: iio: adc: Add ltc2378 Date: Thu, 28 May 2026 12:03:16 -0300 Message-ID: <23971c3bb56d8635abe9cd36fd245412f672772a.1779976379.git.marcelo.schmitt@analog.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTI4MDE1MiBTYWx0ZWRfX4CZsuG5TMQok rv+kpPdyyVDaMupb2j7z78l8cVoFfEzBZiG1/4THyR0biycxwRE0rMEgQFE6+ysgovgZBn5sxM+ YP/O5SDnMs4BcH90GdMvHRcGmPIZ8DeidsLNd8COriwRngo1yeMG+ApULvWWwYCcUv4sNqpcYOa mwaMz8se9Ajm0/46lsNQApaK/tEWKynR9wZkTaf+K8wAr7cdE15UjzUZFUKldpUT2JRxL4HYkXO L1cjcfdtK1MGJpuI4DqMdnDdJAOjgsaomuX9j3EUsMG/mXLz+33H5Y7/js/8Et+i+t0INV6H6pb x9kQ29t+p+ewTZeozaK70iGTvDfSgj4fCxPqtrFa3Csk52QqLfJzFm4I1ZGz9yPMisPHaU5BsxQ 8O0ALF+bVz4YmLJbC6cxFw73exmwIysHlz0+j8kayrmDmB+A8OlP754DsXSjHL8aLf59QwENDjJ rhxtysabW/hCVWzovPw== X-Authority-Analysis: v=2.4 cv=HMbz0Itv c=1 sm=1 tr=0 ts=6a185947 cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=0sLvza09kfJOxVLZPwjg:22 a=OmVn7CZJonkx5R5zMQLL:22 a=gEfo2CItAAAA:8 a=gAnH3GRIAAAA:8 a=VwQbUJbxAAAA:8 a=lrA4KKAfxSG5QlsXGw4A:9 a=sptkURWiP4Gy88Gu7hUp:22 X-Proofpoint-GUID: ULNynLDyMvZF3mwatgeMlCQ1bwXEd_QB X-Proofpoint-ORIG-GUID: ULNynLDyMvZF3mwatgeMlCQ1bwXEd_QB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-05-28_04,2026-05-28_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 lowpriorityscore=0 impostorscore=0 phishscore=0 bulkscore=0 adultscore=0 malwarescore=0 priorityscore=1501 clxscore=1011 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605210000 definitions=main-2605280152 Document how to describe LTC2378-20 and similar ADCs in device tree. Signed-off-by: Marcelo Schmitt --- Change log v1 -> v2: - Use unevaluatedProperties:false with spi-peripheral-props.yaml reference/include. - Use unique compatibles (no fallbacks). .../bindings/iio/adc/adi,ltc2378.yaml | 118 ++++++++++++++++++ MAINTAINERS | 7 ++ 2 files changed, 125 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ltc2378.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ltc2378.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ltc2378.yaml new file mode 100644 index 000000000000..fdc004049521 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ltc2378.yaml @@ -0,0 +1,118 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/adi,ltc2378.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Analog Devices LTC2378 and similar Analog to Digital Converters + +maintainers: + - Marcelo Schmitt + +description: | + Analog Devices LTC2378 series of ADCs. + Specifications can be found at: + https://www.analog.com/media/en/technical-documentation/data-sheets/233818fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/236416fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/236418f.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/236716fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/236718f.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/236816f.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/236818f.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/236918fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237016fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237616fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237618fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237620fb.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237716fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237718fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237720fb.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237816fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237818fa.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237820fb.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/237918fb.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/238016fb.pdf + +$ref: /schemas/spi/spi-peripheral-props.yaml# + +properties: + compatible: + enum: + - adi,ltc2338-18 + - adi,ltc2364-16 + - adi,ltc2364-18 + - adi,ltc2367-16 + - adi,ltc2367-18 + - adi,ltc2368-16 + - adi,ltc2368-18 + - adi,ltc2369-18 + - adi,ltc2370-16 + - adi,ltc2376-16 + - adi,ltc2376-18 + - adi,ltc2376-20 + - adi,ltc2377-16 + - adi,ltc2377-18 + - adi,ltc2377-20 + - adi,ltc2378-16 + - adi,ltc2378-18 + - adi,ltc2378-20 + - adi,ltc2379-18 + - adi,ltc2380-16 + + reg: + maxItems: 1 + + spi-max-frequency: + maximum: 100000000 + + vdd-supply: + description: A 2.5V supply that powers the chip (VDD). + + ovdd-supply: + description: + A 1.71V to 5.25V supply that sets the logic level for digital interface. + + ref-supply: + description: + A 2.5V to 5.1V supply for the reference input (REF). + + cnv-gpios: + description: + When provided, this property indicates the GPIO that is connected to the + CNV pin. + maxItems: 1 + + interrupts: + description: + Interrupt for signaling the completion of conversion results. The active + low signal provided on the BUSY pin asserts when ADC conversions finish. + maxItems: 1 + +required: + - compatible + - reg + - vdd-supply + - ovdd-supply + - ref-supply + +unevaluatedProperties: false + +examples: + - | + #include + #include + spi { + #address-cells = <1>; + #size-cells = <0>; + adc@0 { + compatible = "adi,ltc2378-20"; + reg = <0>; + spi-max-frequency = <71000000>; + vdd-supply = <&supply_2_5V>; + ovdd-supply = <&supply_3_3V>; + ref-supply = <&supply_5V>; + cnv-gpios = <&gpio0 88 GPIO_ACTIVE_HIGH>; + interrupts = <7 IRQ_TYPE_EDGE_FALLING>; + interrupt-parent = <&gpio>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 9e9457c7bba6..43c691ba48cd 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15203,6 +15203,13 @@ S: Maintained F: Documentation/devicetree/bindings/iio/dac/lltc,ltc1660.yaml F: drivers/iio/dac/ltc1660.c +LTC2378 IIO ADC DRIVER +M: Marcelo Schmitt +L: linux-iio@vger.kernel.org +S: Supported +W: https://ez.analog.com/linux-software-drivers +F: Documentation/devicetree/bindings/iio/adc/adi,ltc2378.yaml + LTC2664 IIO DAC DRIVER M: Michael Hennerich M: Kim Seer Paller -- 2.53.0