linux-kernel - [PATCH 2/2] dt-bindings: fpga: add binding doc for ecp5-spi fpga mgr

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Message-Id: <20220714122657.17972-3-i.bornyakov@metrotek.ru>
Date:   Thu, 14 Jul 2022 15:26:57 +0300
From:   Ivan Bornyakov <i.bornyakov@...rotek.ru>
To:     mdf@...nel.org, hao.wu@...el.com, yilun.xu@...el.com,
        trix@...hat.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     Ivan Bornyakov <i.bornyakov@...rotek.ru>,
        linux-fpga@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, system@...rotek.ru
Subject: [PATCH 2/2] dt-bindings: fpga: add binding doc for ecp5-spi fpga mgr

Add Device Tree Binding doc for Lattice ECP5 FPGA manager using slave
SPI to load .bit formatted uncompressed bitstream image.

Signed-off-by: Ivan Bornyakov <i.bornyakov@...rotek.ru>
---
 .../fpga/lattice,ecp5-spi-fpga-mgr.yaml       | 71 +++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/fpga/lattice,ecp5-spi-fpga-mgr.yaml

diff --git a/Documentation/devicetree/bindings/fpga/lattice,ecp5-spi-fpga-mgr.yaml b/Documentation/devicetree/bindings/fpga/lattice,ecp5-spi-fpga-mgr.yaml
new file mode 100644
index 000000000000..79868f9c84e2
--- /dev/null
+++ b/Documentation/devicetree/bindings/fpga/lattice,ecp5-spi-fpga-mgr.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/fpga/lattice,ecp5-spi-fpga-mgr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Lattice ECP5 FPGA manager.
+
+maintainers:
+  - Ivan Bornyakov <i.bornyakov@...rotek.ru>
+
+description:
+  Device Tree Bindings for Lattice ECP5 FPGA Manager using slave SPI to
+  load the uncompressed bitstream in .bit format.
+
+properties:
+  compatible:
+    enum:
+      - lattice,ecp5-spi-fpga-mgr
+
+  reg:
+    description: SPI chip select
+    maxItems: 1
+
+  spi-max-frequency:
+    maximum: 60000000
+
+  program-gpios:
+    description:
+      A GPIO line connected to PROGRAMN (active low) pin of the device.
+      Initiates configuration sequence.
+    maxItems: 1
+
+  init-gpios:
+    description:
+      A GPIO line connected to INITN (active low) pin of the device.
+      Indicates the FPGA is ready to be configured.
+    maxItems: 1
+
+  done-gpios:
+    description:
+      A GPIO line connected to DONE (active high) pin of the device.
+      Indicates that the configuration sequence is complete.
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - program-gpios
+  - init-gpios
+  - done-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    spi {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            fpga_mgr@0 {
+                    compatible = "lattice,ecp5-spi-fpga-mgr";
+                    spi-max-frequency = <20000000>;
+                    reg = <0>;
+                    program-gpios = <&gpio3 4 GPIO_ACTIVE_LOW>;
+                    init-gpios = <&gpio3 3 GPIO_ACTIVE_LOW>;
+                    done-gpios = <&gpio3 2 GPIO_ACTIVE_HIGH>;
+            };
+    };
-- 
2.37.0