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([2.196.42.248]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ada5d7ff075sm154305866b.37.2025.05.29.07.35.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 May 2025 07:35:53 -0700 (PDT) From: Dario Binacchi To: linux-kernel@vger.kernel.org Cc: linux-amarula@amarulasolutions.com, michael@amarulasolutions.com, Dario Binacchi , Conor Dooley , Conor Dooley , Fabio Estevam , Krzysztof Kozlowski , Lee Jones , Pengutronix Kernel Team , Rob Herring , Sascha Hauer , Shawn Guo , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 1/6] dt-bindings: mfd: convert mxs-lradc bindings to json-schema Date: Thu, 29 May 2025 16:35:08 +0200 Message-ID: <20250529143544.2381031-2-dario.binacchi@amarulasolutions.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250529143544.2381031-1-dario.binacchi@amarulasolutions.com> References: <20250529143544.2381031-1-dario.binacchi@amarulasolutions.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250529_073555_563188_411079F4 X-CRM114-Status: GOOD ( 20.45 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Convert the Freescale MXS Low-Resoulution ADC (LRADC) device tree binding documentation to json-schema. The clocks and #io-channel-cells properties have also been added; They are present in the respective SoC DTSI files but were missing from the old mxs-lradc.txt file. Signed-off-by: Dario Binacchi Reviewed-by: Conor Dooley --- Changes in v4: - Fix typo Low-Resoulution -> Low-Resolution' - Wrap lines at 80 char. - Drop '|' from the description - Describe what each interrupt is for. - Move touchscreen-wires constraint for imx28 to the top level Changes in v3: - Add Reviewed-by tag of Conor Dooley .../devicetree/bindings/mfd/mxs-lradc.txt | 45 ------ .../devicetree/bindings/mfd/mxs-lradc.yaml | 131 ++++++++++++++++++ 2 files changed, 131 insertions(+), 45 deletions(-) delete mode 100644 Documentation/devicetree/bindings/mfd/mxs-lradc.txt create mode 100644 Documentation/devicetree/bindings/mfd/mxs-lradc.yaml diff --git a/Documentation/devicetree/bindings/mfd/mxs-lradc.txt b/Documentation/devicetree/bindings/mfd/mxs-lradc.txt deleted file mode 100644 index 755cbef0647d..000000000000 --- a/Documentation/devicetree/bindings/mfd/mxs-lradc.txt +++ /dev/null @@ -1,45 +0,0 @@ -* Freescale MXS LRADC device driver - -Required properties: -- compatible: Should be "fsl,imx23-lradc" for i.MX23 SoC and "fsl,imx28-lradc" - for i.MX28 SoC -- reg: Address and length of the register set for the device -- interrupts: Should contain the LRADC interrupts - -Optional properties: -- fsl,lradc-touchscreen-wires: Number of wires used to connect the touchscreen - to LRADC. Valid value is either 4 or 5. If this - property is not present, then the touchscreen is - disabled. 5 wires is valid for i.MX28 SoC only. -- fsl,ave-ctrl: number of samples per direction to calculate an average value. - Allowed value is 1 ... 32, default is 4 -- fsl,ave-delay: delay between consecutive samples. Allowed value is - 2 ... 2048. It is used if 'fsl,ave-ctrl' > 1, counts at - 2 kHz and its default is 2 (= 1 ms) -- fsl,settling: delay between plate switch to next sample. Allowed value is - 1 ... 2047. It counts at 2 kHz and its default is - 10 (= 5 ms) - -Example for i.MX23 SoC: - - lradc@80050000 { - compatible = "fsl,imx23-lradc"; - reg = <0x80050000 0x2000>; - interrupts = <36 37 38 39 40 41 42 43 44>; - fsl,lradc-touchscreen-wires = <4>; - fsl,ave-ctrl = <4>; - fsl,ave-delay = <2>; - fsl,settling = <10>; - }; - -Example for i.MX28 SoC: - - lradc@80050000 { - compatible = "fsl,imx28-lradc"; - reg = <0x80050000 0x2000>; - interrupts = <10 14 15 16 17 18 19 20 21 22 23 24 25>; - fsl,lradc-touchscreen-wires = <5>; - fsl,ave-ctrl = <4>; - fsl,ave-delay = <2>; - fsl,settling = <10>; - }; diff --git a/Documentation/devicetree/bindings/mfd/mxs-lradc.yaml b/Documentation/devicetree/bindings/mfd/mxs-lradc.yaml new file mode 100644 index 000000000000..f90fdfbb74a8 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/mxs-lradc.yaml @@ -0,0 +1,131 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/mfd/mxs-lradc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Freescale MXS Low-Resolution ADC (LRADC) + +maintainers: + - Dario Binacchi + +description: + The LRADC provides 16 physical channels of 12-bit resolution for + analog-to-digital conversion and includes an integrated 4-wire/5-wire + touchscreen controller. + +properties: + compatible: + items: + - enum: + - fsl,imx23-lradc + - fsl,imx28-lradc + + reg: + maxItems: 1 + + clocks: + minItems: 1 + + interrupts: + minItems: 9 + maxItems: 13 + + fsl,lradc-touchscreen-wires: + $ref: /schemas/types.yaml#/definitions/uint32 + enum: [4, 5] + description: + Number of wires used to connect the touchscreen to LRADC. + If this property is not present, then the touchscreen is disabled. + + fsl,ave-ctrl: + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 1 + maximum: 32 + default: 4 + description: | + Number of samples per direction to calculate an average value. + + fsl,ave-delay: + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 2 + maximum: 2048 + default: 2 + description: + Delay between consecutive samples. + It is used if 'fsl,ave-ctrl' > 1, counts at 2 kHz and its + default value (i. e. 2) is 1 ms. + + fsl,settling: + $ref: /schemas/types.yaml#/definitions/uint32 + minimum: 1 + maximum: 2047 + default: 10 + description: + Delay between plate switch to next sample. + It counts at 2 kHz and its default (i. e. 10) is 5 ms. + + "#io-channel-cells": + const: 1 + +required: + - compatible + - reg + - clocks + - interrupts + +if: + properties: + compatible: + contains: + enum: + - fsl,imx23-lradc +then: + properties: + interrupts: + items: + - description: channel 0 + - description: channel 1 + - description: channel 2 + - description: channel 3 + - description: channel 4 + - description: channel 5 + - description: touchscreen + - description: channel 6 + - description: channel 7 + fsl,lradc-touchscreen-wires: + const: 4 +else: + properties: + interrupts: + items: + - description: threshold 0 + - description: threshold 1 + - description: channel 0 + - description: channel 1 + - description: channel 2 + - description: channel 3 + - description: channel 4 + - description: channel 5 + - description: button 0 + - description: button 1 + - description: touchscreen + - description: channel 6 + - description: channel 7 + +additionalProperties: false + +examples: + - | + lradc@80050000 { + compatible = "fsl,imx23-lradc"; + reg = <0x80050000 0x2000>; + interrupts = <36>, <37>, <38>, <39>, <40>, + <41>, <42>, <43>, <44>; + clocks = <&clks 26>; + #io-channel-cells = <1>; + fsl,lradc-touchscreen-wires = <4>; + fsl,ave-ctrl = <4>; + fsl,ave-delay = <2>; + fsl,settling = <10>; + }; -- 2.43.0