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-rw-r--r--Documentation/devicetree/bindings/input/atmel,maxtouch.yaml32
1 files changed, 32 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml b/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml
index 8c6418f76e94..3ec579d63570 100644
--- a/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml
+++ b/Documentation/devicetree/bindings/input/atmel,maxtouch.yaml
@@ -39,6 +39,13 @@ properties:
(active low). The line must be flagged with
GPIO_ACTIVE_LOW.
+ wake-gpios:
+ maxItems: 1
+ description:
+ Optional GPIO specifier for the touchscreen's wake pin
+ (active low). The line must be flagged with
+ GPIO_ACTIVE_LOW.
+
linux,gpio-keymap:
$ref: /schemas/types.yaml#/definitions/uint32-array
description: |
@@ -53,6 +60,29 @@ properties:
or experiment to determine which bit corresponds to which input. Use
KEY_RESERVED for unused padding values.
+ atmel,wakeup-method:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: |
+ The WAKE line is an active-low input that is used to wake up the touch
+ controller from deep-sleep mode before communication with the controller
+ could be started. This optional feature used to minimize current
+ consumption when the controller is in deep sleep mode. This feature is
+ relevant only to some controller families, like mXT1386 controller for
+ example.
+
+ The WAKE pin can be connected in one of the following ways:
+ 1) left permanently low
+ 2) connected to the I2C-compatible SCL pin
+ 3) connected to a GPIO pin on the host
+ enum:
+ - 0 # ATMEL_MXT_WAKEUP_NONE
+ - 1 # ATMEL_MXT_WAKEUP_I2C_SCL
+ - 2 # ATMEL_MXT_WAKEUP_GPIO
+ default: 0
+
+ wakeup-source:
+ type: boolean
+
required:
- compatible
- reg
@@ -63,6 +93,7 @@ additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/input/atmel-maxtouch.h>
#include <dt-bindings/gpio/gpio.h>
i2c {
#address-cells = <1>;
@@ -75,6 +106,7 @@ examples:
reset-gpios = <&gpio 27 GPIO_ACTIVE_LOW>;
vdda-supply = <&ab8500_ldo_aux2_reg>;
vdd-supply = <&ab8500_ldo_aux5_reg>;
+ atmel,wakeup-method = <ATMEL_MXT_WAKEUP_I2C_SCL>;
};
};