projects / deliverable / linux.git / blame
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|---|---|---|
| aaa27982 AD |
1 | Synaptics RMI4 2D Sensor Device Binding |
| 2 | ||
| 3 | The Synaptics RMI4 core is able to support RMI4 devices using different | |
| 4 | transports and different functions. This file describes the device tree | |
| 5 | bindings for devices which contain 2D sensors using Function 11 or | |
| 6 | Function 12. Complete documentation for transports and other functions | |
| 7 | can be found in: | |
| 8 | Documentation/devicetree/bindings/input/rmi4. | |
| 9 | ||
| 10 | RMI4 Function 11 and Function 12 are for 2D touch position sensing. | |
| 11 | Additional documentation for F11 can be found at: | |
| 12 | http://www.synaptics.com/sites/default/files/511-000136-01-Rev-E-RMI4-Interfacing-Guide.pdf | |
| 13 | ||
| 14 | Optional Touch Properties: | |
| 15 | Description in Documentation/devicetree/bindings/input/touch | |
| 16 | - touchscreen-inverted-x | |
| 17 | - touchscreen-inverted-y | |
| 18 | - touchscreen-swapped-x-y | |
| 19 | - touchscreen-x-mm | |
| 20 | - touchscreen-y-mm | |
| 21 | ||
| 22 | Optional Properties: | |
| 23 | - syna,clip-x-low: Sets a minimum value for X. | |
| 24 | - syna,clip-y-low: Sets a minimum value for Y. | |
| 25 | - syna,clip-x-high: Sets a maximum value for X. | |
| 26 | - syna,clip-y-high: Sets a maximum value for Y. | |
| 27 | - syna,offset-x: Add an offset to X. | |
| 28 | - syna,offset-y: Add an offset to Y. | |
| 29 | - syna,delta-x-threshold: Set the minimum distance on the X axis required | |
| 30 | to generate an interrupt in reduced reporting | |
| 31 | mode. | |
| 32 | - syna,delta-y-threshold: Set the minimum distance on the Y axis required | |
| 33 | to generate an interrupt in reduced reporting | |
| 34 | mode. | |
| 35 | - syna,sensor-type: Set the sensor type. 1 for touchscreen 2 for touchpad. | |
| 36 | - syna,disable-report-mask: Mask for disabling posiiton reporting. Used to | |
| 37 | disable reporing absolute position data. | |
| 38 | - syna,rezero-wait-ms: Time in miliseconds to wait after issuing a rezero | |
| 39 | command. | |
| 40 | ||
| 41 | ||
| 42 | Example of a RMI4 I2C device with F11: | |
| 43 | Example: | |
| 44 | &i2c1 { | |
| 45 | rmi4-i2c-dev@2c { | |
| 46 | compatible = "syna,rmi4-i2c"; | |
| 47 | ||
| 48 | ... | |
| 49 | ||
| 50 | rmi4-f11@11 { | |
| 51 | reg = <0x11>; | |
| 52 | touchscreen-inverted-y; | |
| 53 | syna,sensor-type = <2>; | |
| 54 | }; | |
| 55 | }; | |
| 56 | }; |