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@xxxxxxxxxxxx> --- .../bindings/input/elan,ekth6915.yaml | 29 ++++++++++++++++--- 1 file changed, 25 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/input/elan,ekth6915.yaml b/Documentation/devicetree/bindings/input/elan,ekth6915.yaml index cb3e1801b0d3..81c391952ccc 100644 --- a/Documentation/devicetree/bindings/input/elan,ekth6915.yaml +++ b/Documentation/devicetree/bindings/input/elan,ekth6915.yaml @@ -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@xxxxxxxxxxxx> 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: -- 2.49.0.rc0.332.g42c0ae87b1-goog
