linux-kernel - [PATCH v4 1/3] dt-bindings: can: rockchip

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Message-Id: <20250522074616.3115348-2-zhangqing@rock-chips.com>
Date: Thu, 22 May 2025 15:46:14 +0800
From: Elaine Zhang <zhangqing@...k-chips.com>
To: zhangqing@...k-chips.com,
	mkl@...gutronix.de,
	kernel@...gutronix.de,
	mailhol.vincent@...adoo.fr,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	heiko@...ech.de,
	cl@...k-chips.com,
	kever.yang@...k-chips.com
Cc: linux-can@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: [PATCH v4 1/3] dt-bindings: can: rockchip_canfd: add rk3576 CAN-FD controller

Add documentation for the rockchip rk3576 CAN-FD controller.

Signed-off-by: Elaine Zhang <zhangqing@...k-chips.com>
---
 .../net/can/rockchip,rk3576-canfd.yaml        | 86 +++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/net/can/rockchip,rk3576-canfd.yaml

diff --git a/Documentation/devicetree/bindings/net/can/rockchip,rk3576-canfd.yaml b/Documentation/devicetree/bindings/net/can/rockchip,rk3576-canfd.yaml
new file mode 100644
index 000000000000..c4526bfe2073
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/can/rockchip,rk3576-canfd.yaml
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/can/rockchip,rk3576-canfd.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Rk3576 CAN-FD controller
+
+maintainers:
+  - Marc Kleine-Budde <mkl@...gutronix.de>
+
+allOf:
+  - $ref: can-controller.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - const: rockchip,rk3576-canfd
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    items:
+      - const: baud
+      - const: pclk
+
+  resets:
+    maxItems: 2
+
+  reset-names:
+    items:
+      - const: core
+      - const: apb
+
+  dmas:
+    maxItems: 1
+
+  dma-names:
+    items:
+      - const: rx
+
+  rockchip,auto-retx-cnt:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: After TX fails, it attempts to automatically retransmit the number of times. If it is not configured, it will keep trying to retransmit.
+
+  rockchip,rx-max-data:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: CAN Rx data size(unit word). CAN frames can be configured as 4, and CANFD frames can be configured as 18.If not configured, it defaults to 18.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - resets
+  - dmas
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/rockchip,rk3576-cru.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        can@...00000 {
+            compatible = "rockchip,rk3576-canfd";
+            reg = <0x0 0x2ac00000 0x0 0x1000>;
+            interrupts = <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&cru CLK_CAN0>, <&cru PCLK_CAN0>;
+            clock-names = "baud", "pclk";
+            resets = <&cru SRST_CAN0>, <&cru SRST_P_CAN0>;
+            reset-names = "core", "apb";
+        };
+    };
-- 
2.34.1