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Message-ID: <20250913092707.1005616-1-dario.binacchi@amarulasolutions.com>
Date: Sat, 13 Sep 2025 11:26:51 +0200
From: Dario Binacchi <dario.binacchi@...rulasolutions.com>
To: linux-kernel@...r.kernel.org
Cc: linux-amarula@...rulasolutions.com,
Dario Binacchi <dario.binacchi@...rulasolutions.com>,
Conor Dooley <conor+dt@...nel.org>,
Dmitry Torokhov <dmitry.torokhov@...il.com>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Rob Herring <robh@...nel.org>,
devicetree@...r.kernel.org,
linux-input@...r.kernel.org
Subject: [PATCH v2 1/5] dt-bindings: touchscreen: convert bu21013 bindings to json schema
Convert Rohm BU21013 I2C touchscreen controller device tree binding to
json-schema.
Additional changes:
- Replace <supply_name>-supply with avdd-supply to match example and
existing DTS.
- Add reset-gpios in the example because it is required.
Signed-off-by: Dario Binacchi <dario.binacchi@...rulasolutions.com>
---
Changes in v2:
- Added in v2
.../bindings/input/touchscreen/bu21013.txt | 43 ---------
.../bindings/input/touchscreen/bu21013.yaml | 96 +++++++++++++++++++
2 files changed, 96 insertions(+), 43 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/input/touchscreen/bu21013.txt
create mode 100644 Documentation/devicetree/bindings/input/touchscreen/bu21013.yaml
diff --git a/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt b/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt
deleted file mode 100644
index da4c9d8b99b1..000000000000
--- a/Documentation/devicetree/bindings/input/touchscreen/bu21013.txt
+++ /dev/null
@@ -1,43 +0,0 @@
-* Rohm BU21013 Touch Screen
-
-Required properties:
- - compatible : "rohm,bu21013_tp"
- - reg : I2C device address
- - reset-gpios : GPIO pin enabling (selecting) chip (CS)
- - interrupt-parent : the phandle for the gpio controller
- - interrupts : (gpio) interrupt to which the chip is connected
-
-Optional properties:
- - touch-gpios : GPIO pin registering a touch event
- - <supply_name>-supply : Phandle to a regulator supply
- - touchscreen-size-x : General touchscreen binding, see [1].
- - touchscreen-size-y : General touchscreen binding, see [1].
- - touchscreen-inverted-x : General touchscreen binding, see [1].
- - touchscreen-inverted-y : General touchscreen binding, see [1].
- - touchscreen-swapped-x-y : General touchscreen binding, see [1].
-
-[1] All general touchscreen properties are described in
- Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt.
-
-Deprecated properties:
- - rohm,touch-max-x : Maximum outward permitted limit in the X axis
- - rohm,touch-max-y : Maximum outward permitted limit in the Y axis
- - rohm,flip-x : Flip touch coordinates on the X axis
- - rohm,flip-y : Flip touch coordinates on the Y axis
-
-Example:
-
- i2c@...10000 {
- bu21013_tp@5c {
- compatible = "rohm,bu21013_tp";
- reg = <0x5c>;
- interrupt-parent = <&gpio2>;
- interrupts <&20 IRQ_TYPE_LEVEL_LOW>;
- touch-gpio = <&gpio2 20 GPIO_ACTIVE_LOW>;
- avdd-supply = <&ab8500_ldo_aux1_reg>;
-
- touchscreen-size-x = <384>;
- touchscreen-size-y = <704>;
- touchscreen-inverted-y;
- };
- };
diff --git a/Documentation/devicetree/bindings/input/touchscreen/bu21013.yaml b/Documentation/devicetree/bindings/input/touchscreen/bu21013.yaml
new file mode 100644
index 000000000000..aeb581fcaf29
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/bu21013.yaml
@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/bu21013.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rohm BU21013 touchscreen
+
+description:
+ Rohm BU21013 I2C driven touchscreen controller.
+
+maintainers:
+ - Dario Binacchi <dario.binacchi@...rulasolutions.com>
+
+allOf:
+ - $ref: touchscreen.yaml#
+
+properties:
+ compatible:
+ enum:
+ - rohm,bu21013_tp
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ reset-gpios:
+ maxItems: 1
+ description: GPIO resetting the chip
+
+ touch-gpios:
+ maxItems: 1
+ description: GPIO registering a touch event.
+
+ avdd-supply:
+ description: Phandle to the regulator supplying the analog circuit.
+
+ rohm,touch-max-x:
+ deprecated: true
+ description: Maximum value on the X axis.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ rohm,touch-max-y:
+ deprecated: true
+ description: Maximum value on the Y axis.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ rohm,flip-x:
+ deprecated: true
+ description: Flip touch coordinates on the X axis
+ type: boolean
+
+ rohm,flip-y:
+ deprecated: true
+ description: Flip touch coordinates on the Y axis
+ type: boolean
+
+ touchscreen-inverted-x: true
+ touchscreen-inverted-y: true
+ touchscreen-size-x: true
+ touchscreen-size-y: true
+ touchscreen-swapped-x-y: true
+
+additionalProperties: false
+
+required:
+ - compatible
+ - reg
+ - reset-gpios
+ - interrupts
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ touchscreen@5c {
+ compatible = "rohm,bu21013_tp";
+ reg = <0x5c>;
+
+ interrupt-parent = <&gpio2>;
+ interrupts = <0x20 IRQ_TYPE_LEVEL_LOW>;
+ reset-gpios = <&gpio2 19 GPIO_ACTIVE_LOW>;
+ touch-gpios = <&gpio2 20 GPIO_ACTIVE_LOW>;
+ avdd-supply = <&ab8500_ldo_aux1_reg>;
+
+ touchscreen-size-x = <384>;
+ touchscreen-size-y = <704>;
+ touchscreen-inverted-y;
+ };
+ };
--
2.43.0
base-commit: 22f20375f5b71f30c0d6896583b93b6e4bba7279
branch: drop-touchscreen.txt
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