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| author | Zhu Yi <yi.zhu5@cn.bosch.com> | 2018-05-30 20:41:11 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2018-06-25 00:20:12 +0200 |
| commit | 3a658f23fb689107d9dd4801f3042978723b0e8c (patch) | |
| tree | f94bccefd3c81ffe68a2b889924ded71f4a3cc02 /Documentation | |
| parent | Input: imx6ul_tsc - switch to SPDX identifier (diff) | |
| download | linux-3a658f23fb689107d9dd4801f3042978723b0e8c.tar.xz linux-3a658f23fb689107d9dd4801f3042978723b0e8c.zip | |
Input: add bu21029 touch driver
Add Rohm BU21029 resistive touch panel controller support with I2C
interface.
Signed-off-by: Zhu Yi <yi.zhu5@cn.bosch.com>
Signed-off-by: Mark Jonas <mark.jonas@de.bosch.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/input/touchscreen/bu21029.txt | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/touchscreen/bu21029.txt b/Documentation/devicetree/bindings/input/touchscreen/bu21029.txt new file mode 100644 index 000000000000..8daa0e868a8f --- /dev/null +++ b/Documentation/devicetree/bindings/input/touchscreen/bu21029.txt @@ -0,0 +1,35 @@ +* Rohm BU21029 Touch Screen Controller + +Required properties: + - compatible : must be "rohm,bu21029" + - reg : i2c device address of the chip (0x40 or 0x41) + - interrupt-parent : the phandle for the gpio controller + - interrupts : (gpio) interrupt to which the chip is connected + - rohm,x-plate-ohms : x-plate resistance in Ohm + +Optional properties: + - reset-gpios : gpio pin to reset the chip (active low) + - touchscreen-size-x : horizontal resolution of touchscreen (in pixels) + - touchscreen-size-y : vertical resolution of touchscreen (in pixels) + - touchscreen-max-pressure: maximum pressure value + - vdd-supply : power supply for the controller + +Example: + + &i2c1 { + /* ... */ + + bu21029: bu21029@40 { + compatible = "rohm,bu21029"; + reg = <0x40>; + interrupt-parent = <&gpio1>; + interrupts = <4 IRQ_TYPE_EDGE_FALLING>; + reset-gpios = <&gpio6 16 GPIO_ACTIVE_LOW>; + rohm,x-plate-ohms = <600>; + touchscreen-size-x = <800>; + touchscreen-size-y = <480>; + touchscreen-max-pressure = <4095>; + }; + + /* ... */ + }; |