@@ -4,14 +4,14 @@
$id: http://devicetree.org/schemas/input/elan,ekth6915.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
-title: Elan eKTH6915 touchscreen controller
+title: Elan I2C-HID touchscreen controllers
maintainers:
- Douglas Anderson <dianders@chromium.org>
description:
- Supports the Elan eKTH6915 touchscreen controller.
- This touchscreen controller uses the i2c-hid protocol with a reset GPIO.
+ Supports the Elan eKTH6915 and other I2C-HID touchscreen controllers.
+ These touchscreen controller use the i2c-hid protocol with a reset GPIO.
allOf:
- $ref: /schemas/input/touchscreen/touchscreen.yaml#
@@ -23,12 +23,18 @@ properties:
- enum:
- elan,ekth5015m
- const: elan,ekth6915
+ - items:
+ - enum:
+ - elan,ekth8d18
+ - const: elan,ekth6a12nay
- enum:
- elan,ekth6915
- elan,ekth6a12nay
reg:
- const: 0x10
+ enum:
+ - 0x10
+ - 0x16
interrupts:
maxItems: 1
@@ -58,6 +64,21 @@ required:
- interrupts
- vcc33-supply
+if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - elan,ekth8d18
+then:
+ properties:
+ reg:
+ const: 0x16
+else:
+ properties:
+ reg:
+ const: 0x10
+
additionalProperties: false
examples:
The Elan eKTH8D18 touchscreen controller is an I2C HID device with a longer boot-up time. Power sequence timing wise it is compatible with the eKTH6A12NAY, with a power-on delay of at least 5ms, 20ms out-of-reset for I2C ack response, and 150ms out-of-reset for I2C HID enumeration. Enumeration and subsequent operation follows the I2C HID standard. The eKTH6A12NAY requires longer times for both parts. Add a compatible string for it with the ekth6a12nay one as a fallback. Signed-off-by: Chen-Yu Tsai <wenst@chromium.org> --- .../bindings/input/elan,ekth6915.yaml | 29 ++++++++++++++++--- 1 file changed, 25 insertions(+), 4 deletions(-)