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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/input/touchscreen/cyttsp.txt | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | Documentation/devicetree/bindings/input/touchscreen/cyttsp.txt | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/touchscreen/cyttsp.txt b/Documentation/devicetree/bindings/input/touchscreen/cyttsp.txt new file mode 100644 index 000000000..6ee274aa8 --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/cyttsp.txt @@ -0,0 +1,93 @@ +* Cypress cyttsp touchscreen controller + +Required properties: + - compatible : must be "cypress,cyttsp-i2c" or "cypress,cyttsp-spi" + - reg : Device I2C address or SPI chip select number + - spi-max-frequency : Maximum SPI clocking speed of the device (for cyttsp-spi) + - interrupts : (gpio) interrupt to which the chip is connected + (see interrupt binding[0]). + - bootloader-key : the 8-byte bootloader key that is required to switch + the chip from bootloader mode (default mode) to + application mode. + This property has to be specified as an array of 8 + '/bits/ 8' values. + +Optional properties: + - reset-gpios : the reset gpio the chip is connected to + (see GPIO binding[1] for more details). + - touchscreen-size-x : horizontal resolution of touchscreen (in pixels) + - touchscreen-size-y : vertical resolution of touchscreen (in pixels) + - touchscreen-fuzz-x : horizontal noise value of the absolute input device + (in pixels) + - touchscreen-fuzz-y : vertical noise value of the absolute input device + (in pixels) + - active-distance : the distance in pixels beyond which a touch must move + before movement is detected and reported by the device. + Valid values: 0-15. + - active-interval-ms : the minimum period in ms between consecutive + scanning/processing cycles when the chip is in active mode. + Valid values: 0-255. + - lowpower-interval-ms : the minimum period in ms between consecutive + scanning/processing cycles when the chip is in low-power mode. + Valid values: 0-2550 + - touch-timeout-ms : minimum time in ms spent in the active power state while no + touches are detected before entering low-power mode. + Valid values: 0-2550 + - use-handshake : enable register-based handshake (boolean). This should + only be used if the chip is configured to use 'blocking + communication with timeout' (in this case the device + generates an interrupt at the end of every + scanning/processing cycle). + +[0]: Documentation/devicetree/bindings/interrupt-controller/interrupts.txt +[1]: Documentation/devicetree/bindings/gpio/gpio.txt + +Example: + &i2c1 { + /* ... */ + cyttsp@a { + compatible = "cypress,cyttsp-i2c"; + reg = <0xa>; + interrupt-parent = <&gpio0>; + interrupts = <28 0>; + reset-gpios = <&gpio3 4 GPIO_ACTIVE_LOW>; + + touchscreen-size-x = <800>; + touchscreen-size-y = <480>; + touchscreen-fuzz-x = <4>; + touchscreen-fuzz-y = <7>; + + bootloader-key = /bits/ 8 <0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08>; + active-distance = <8>; + active-interval-ms = <0>; + lowpower-interval-ms = <200>; + touch-timeout-ms = <100>; + }; + + /* ... */ + }; + + &mcspi1 { + /* ... */ + cyttsp@0 { + compatible = "cypress,cyttsp-spi"; + spi-max-frequency = <6000000>; + reg = <0>; + interrupt-parent = <&gpio0>; + interrupts = <28 0>; + reset-gpios = <&gpio3 4 GPIO_ACTIVE_LOW>; + + touchscreen-size-x = <800>; + touchscreen-size-y = <480>; + touchscreen-fuzz-x = <4>; + touchscreen-fuzz-y = <7>; + + bootloader-key = /bits/ 8 <0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08>; + active-distance = <8>; + active-interval-ms = <0>; + lowpower-interval-ms = <200>; + touch-timeout-ms = <100>; + }; + + /* ... */ + }; |