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Diffstat (limited to 'sys/contrib/device-tree/Bindings/mfd/mxs-lradc.yaml')
| -rw-r--r-- | sys/contrib/device-tree/Bindings/mfd/mxs-lradc.yaml | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/sys/contrib/device-tree/Bindings/mfd/mxs-lradc.yaml b/sys/contrib/device-tree/Bindings/mfd/mxs-lradc.yaml new file mode 100644 index 000000000000..782b2f4005a0 --- /dev/null +++ b/sys/contrib/device-tree/Bindings/mfd/mxs-lradc.yaml @@ -0,0 +1,134 @@ +# 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 <dario.binacchi@amarulasolutions.com> + +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 (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 (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>; + }; |
