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[37.212.8.167]) by smtp.gmail.com with ESMTPSA id l13-20020a05600c2ccd00b003a2f2bb72d5sm9141750wmc.45.2022.10.31.12.02.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 31 Oct 2022 12:02:32 -0700 (PDT) From: Siarhei Volkau Cc: Paul Cercueil , Siarhei Volkau , Dmitry Torokhov , Rob Herring , Krzysztof Kozlowski , Artur Rojek , linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 1/2] dt-bindings: adc-joystick: add valid-range Date: Mon, 31 Oct 2022 22:01:58 +0300 Message-Id: <20221031190159.1341027-2-lis8215@gmail.com> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20221031190159.1341027-1-lis8215@gmail.com> References: <20221031190159.1341027-1-lis8215@gmail.com> MIME-Version: 1.0 To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org The valid-range property aims to cover detachable/lock-able joysticks where measured value goes outside valid-range. Signed-off-by: Siarhei Volkau --- .../bindings/input/adc-joystick.yaml | 62 +++++++++++++++++++ 1 file changed, 62 insertions(+) diff --git a/Documentation/devicetree/bindings/input/adc-joystick.yaml b/Documentation/devicetree/bindings/input/adc-joystick.yaml index da0f8dfca..0483f0afe 100644 --- a/Documentation/devicetree/bindings/input/adc-joystick.yaml +++ b/Documentation/devicetree/bindings/input/adc-joystick.yaml @@ -91,6 +91,20 @@ patternProperties: Omitting this property indicates the axis always returns to exactly the center position. + valid-range: + $ref: /schemas/types.yaml#/definitions/uint32-array + items: + - description: minimum value + - description: maximum value + description: > + Minimum and maximum values which are still valid for the axis. + If the value is outside the range an event won't emitted. + Shall fully cover the abs-range with some space added, + to take into account imprecise analog nature of the joystick. + When value goes out of valid range - corresponding axis is + centered. The center point calculated on abs-range basis. + This property is interpreted as two signed 32 bit values. + required: - reg - linux,code @@ -125,3 +139,51 @@ examples: abs-flat = <200>; }; }; + # A rather complex joystick hardware definition + # with two axes muxed into one ADC channel. + - | + #include + #include + #include + + gpio_mux: mux-controller { + compatible = "gpio-mux"; + #mux-control-cells = <0>; + + mux-gpios = <&gpe 2 GPIO_ACTIVE_HIGH>; + }; + + adcmux: adc-mux { + compatible = "io-channel-mux"; + io-channels = <&adc INGENIC_ADC_AUX>; + io-channel-names = "parent"; + #io-channel-cells = <1>; + + mux-controls = <&gpio_mux>; + + channels = "joystick-axis-x", "joystick-axis-y"; + }; + + joystick: joystick { + compatible = "adc-joystick"; + io-channels = <&adcmux 0>, <&adcmux 1>; + io-channel-names = "joystick-axis-x", "joystick-axis-y"; + #address-cells = <1>; + #size-cells = <0>; + + poll-interval = <16>; + + axis@0 { + reg = <0>; + linux,code = ; + abs-range = <3400 670>; + valid-range = <300 3700>; + }; + + axis@1 { + reg = <1>; + linux,code = ; + abs-range = <670 3400>; + valid-range = <300 3700>; + }; + };