[PATCH v4 4/5] dt-bindings: usb: atmel,at91rm9200-udc: convert to DT schema

Charan Pedumuru
2026-03-27T16:48:11Z

Convert Atmel AT91 USB Device Controller (UDC) binding to DT schema.
Changes during conversion:
- Include "atmel,pullup-gpio" and "atmel,matrix" in the properties since
they are required by existing in-tree DTS definitions.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Charan Pedumuru <charan.pedumuru@gmail.com>
---
.../bindings/usb/atmel,at91rm9200-udc.yaml | 76 ++++++++++++++++++++++
.../devicetree/bindings/usb/atmel-usb.txt | 28 --------
2 files changed, 76 insertions(+), 28 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/atmel,at91rm9200-udc.yaml b/Documentation/devicetree/bindings/usb/atmel,at91rm9200-udc.yaml
new file mode 100644
index 000000000000..a4eabb935e6e
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/atmel,at91rm9200-udc.yaml
@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/usb/atmel,at91rm9200-udc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Atmel AT91 USB Device Controller (UDC)
+
+maintainers:
+ - Nicolas Ferre <nicolas.ferre@microchip.com>
+ - Alexandre Belloni <alexandre.belloni@bootlin.com>
+
+description:
+ The Atmel AT91 USB Device Controller provides USB gadget (device-mode)
+ functionality on AT91 SoCs. It requires a peripheral clock and an AHB
+ clock for operation and may optionally control VBUS power through a GPIO.
+
+properties:
+ compatible:
+ enum:
+ - atmel,at91rm9200-udc
+ - atmel,at91sam9260-udc
+ - atmel,at91sam9261-udc
+ - atmel,at91sam9263-udc
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 2
+
+ clock-names:
+ items:
+ - const: pclk
+ - const: hclk
+
+ atmel,vbus-gpio:
+ description: GPIO used to enable or control VBUS power for the USB bus.
+ maxItems: 1
+
+ atmel,matrix:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description: Phandle to the Atmel bus matrix controller.
+
+ atmel,pullup-gpio:
+ description:
+ GPIO controlling the USB D+ pull-up resistor used to signal device
+ connection to the host.
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - clock-names
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/clock/at91.h>
+ #include <dt-bindings/gpio/gpio.h>
+ gadget@fffa4000 {
+ compatible = "atmel,at91rm9200-udc";
+ reg = <0xfffa4000 0x4000>;
+ interrupts = <11 IRQ_TYPE_LEVEL_HIGH 2>;
+ clocks = <&udc_clk>, <&udpck>;
+ clock-names = "pclk", "hclk";
+ atmel,vbus-gpio = <&pioC 5 GPIO_ACTIVE_HIGH>;
+ };
+...
diff --git a/Documentation/devicetree/bindings/usb/atmel-usb.txt b/Documentation/devicetree/bindings/usb/atmel-usb.txt
index bf2149e5f0b3..ab353576d1de 100644
--- a/Documentation/devicetree/bindings/usb/atmel-usb.txt
+++ b/Documentation/devicetree/bindings/usb/atmel-usb.txt
@@ -1,33 +1,5 @@
Atmel SOC USB controllers

-AT91 USB device controller
-
-Required properties:
- - compatible: Should be one of the following
- "atmel,at91rm9200-udc"
- "atmel,at91sam9260-udc"
- "atmel,at91sam9261-udc"
- "atmel,at91sam9263-udc"
- - reg: Address and length of the register set for the device
- - interrupts: Should contain macb interrupt
- - clocks: Should reference the peripheral and the AHB clocks
- - clock-names: Should contain two strings
- "pclk" for the peripheral clock
- "hclk" for the AHB clock
-
-Optional properties:
- - atmel,vbus-gpio: If present, specifies a gpio that needs to be
- activated for the bus to be powered.
-
-usb1: gadget@fffa4000 {
- compatible = "atmel,at91rm9200-udc";
- reg = <0xfffa4000 0x4000>;
- interrupts = <10 4>;
- clocks = <&udc_clk>, <&udpck>;
- clock-names = "pclk", "hclk";
- atmel,vbus-gpio = <&pioC 5 0>;
-};
-
Atmel High-Speed USB device controller

Required properties:

--
2.53.0