linux-kernel - [PATCH] dt-bindings: fpga: Convert lattice,ice40-fpga-mgr to DT schema

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Message-ID: <20251029185503.2124434-1-robh@kernel.org>
Date: Wed, 29 Oct 2025 13:55:01 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Moritz Fischer <mdf@...nel.org>,
	Xu Yilun <yilun.xu@...el.com>,
	Tom Rix <trix@...hat.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Joel Holdsworth <joel@...webreathe.org.uk>
Cc: linux-fpga@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: fpga: Convert lattice,ice40-fpga-mgr to DT schema

Convert the lattice,ice40-fpga-mgr binding to DT schema format. It's a
straight-forward conversion.

Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
 .../bindings/fpga/lattice,ice40-fpga-mgr.yaml | 59 +++++++++++++++++++
 .../bindings/fpga/lattice-ice40-fpga-mgr.txt  | 21 -------
 2 files changed, 59 insertions(+), 21 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/fpga/lattice,ice40-fpga-mgr.yaml
 delete mode 100644 Documentation/devicetree/bindings/fpga/lattice-ice40-fpga-mgr.txt

diff --git a/Documentation/devicetree/bindings/fpga/lattice,ice40-fpga-mgr.yaml b/Documentation/devicetree/bindings/fpga/lattice,ice40-fpga-mgr.yaml
new file mode 100644
index 000000000000..5121c6120785
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/lattice,ice40-fpga-mgr.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/fpga/lattice,ice40-fpga-mgr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Lattice iCE40 FPGA Manager
+
+maintainers:
+  - Joel Holdsworth <joel@...webreathe.org.uk>
+
+properties:
+  compatible:
+    const: lattice,ice40-fpga-mgr
+
+  reg:
+    maxItems: 1
+
+  spi-max-frequency:
+    minimum: 1000000
+    maximum: 25000000
+
+  cdone-gpios:
+    maxItems: 1
+    description: GPIO input connected to CDONE pin
+
+  reset-gpios:
+    maxItems: 1
+    description:
+      Active-low GPIO output connected to CRESET_B pin. Note that unless the
+      GPIO is held low during startup, the FPGA will enter Master SPI mode and
+      drive SCK with a clock signal potentially jamming other devices on the bus
+      until the firmware is loaded.
+
+required:
+  - compatible
+  - reg
+  - spi-max-frequency
+  - cdone-gpios
+  - reset-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        fpga@0 {
+            compatible = "lattice,ice40-fpga-mgr";
+            reg = <0>;
+            spi-max-frequency = <1000000>;
+            cdone-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>;
+            reset-gpios = <&gpio 22 GPIO_ACTIVE_LOW>;
+        };
+    };
diff --git a/Documentation/devicetree/bindings/fpga/lattice-ice40-fpga-mgr.txt b/Documentation/devicetree/bindings/fpga/lattice-ice40-fpga-mgr.txt
deleted file mode 100644
index 4dc412437b08..000000000000
--- a/Documentation/devicetree/bindings/fpga/lattice-ice40-fpga-mgr.txt
+++ /dev/null
@@ -1,21 +0,0 @@
-Lattice iCE40 FPGA Manager
-
-Required properties:
-- compatible:		Should contain "lattice,ice40-fpga-mgr"
-- reg:			SPI chip select
-- spi-max-frequency:	Maximum SPI frequency (>=1000000, <=25000000)
-- cdone-gpios:		GPIO input connected to CDONE pin
-- reset-gpios:		Active-low GPIO output connected to CRESET_B pin. Note
-			that unless the GPIO is held low during startup, the
-			FPGA will enter Master SPI mode and drive SCK with a
-			clock signal potentially jamming other devices on the
-			bus until the firmware is loaded.
-
-Example:
-	fpga: fpga@0 {
-		compatible = "lattice,ice40-fpga-mgr";
-		reg = <0>;
-		spi-max-frequency = <1000000>;
-		cdone-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>;
-		reset-gpios = <&gpio 22 GPIO_ACTIVE_LOW>;
-	};
-- 
2.51.0