dt-bindings: spi: Convert Tegra114 SPI to json-schema

Convert the Tegra114 SPI controller device tree bindings from plain text
to json-schema format.

Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230705152603.2514235-3-thierry.reding@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.txt b/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.txt
deleted file mode 100644 (file)
index db8e0d7..0000000
--- a/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.txt
+++ /dev/null
@@ -1,61 +0,0 @@
-NVIDIA Tegra114 SPI controller.
-
-Required properties:
-- compatible : For Tegra114, must contain "nvidia,tegra114-spi".
-  Otherwise, must contain '"nvidia,<chip>-spi", "nvidia,tegra114-spi"' where
-  <chip> is tegra124, tegra132, or tegra210.
-- reg: Should contain SPI registers location and length.
-- interrupts: Should contain SPI interrupts.
-- clock-names : Must include the following entries:
-  - spi
-- resets : Must contain an entry for each entry in reset-names.
-  See ../reset/reset.txt for details.
-- reset-names : Must include the following entries:
-  - spi
-- dmas : Must contain an entry for each entry in clock-names.
-  See ../dma/dma.txt for details.
-- dma-names : Must include the following entries:
-  - rx
-  - tx
-- clocks : Must contain an entry for each entry in clock-names.
-  See ../clocks/clock-bindings.txt for details.
-
-Recommended properties:
-- spi-max-frequency: Definition as per
-                     Documentation/devicetree/bindings/spi/spi-bus.txt
-Optional properties:
-- nvidia,tx-clk-tap-delay: Delays the clock going out to the external device
-  with this tap value. This property is used to tune the outgoing data from
-  Tegra SPI master with respect to outgoing Tegra SPI master clock.
-  Tap values vary based on the platform design trace lengths from Tegra SPI
-  to corresponding slave devices. Valid tap values are from 0 thru 63.
-- nvidia,rx-clk-tap-delay: Delays the clock coming in from the external device
-  with this tap value. This property is used to adjust the Tegra SPI master
-  clock with respect to the data from the SPI slave device.
-  Tap values vary based on the platform design trace lengths from Tegra SPI
-  to corresponding slave devices. Valid tap values are from 0 thru 63.
-
-Example:
-
-spi@7000d600 {
-       compatible = "nvidia,tegra114-spi";
-       reg = <0x7000d600 0x200>;
-       interrupts = <0 82 0x04>;
-       spi-max-frequency = <25000000>;
-       #address-cells = <1>;
-       #size-cells = <0>;
-       clocks = <&tegra_car 44>;
-       clock-names = "spi";
-       resets = <&tegra_car 44>;
-       reset-names = "spi";
-       dmas = <&apbdma 16>, <&apbdma 16>;
-       dma-names = "rx", "tx";
-       <spi-client>@<bus_num> {
-               ...
-               ...
-               nvidia,rx-clk-tap-delay = <0>;
-               nvidia,tx-clk-tap-delay = <16>;
-               ...
-       };
-
-};

diff --git a/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.yaml b/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.yaml
new file mode 100644 (file)
index 0000000..58222ff
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/nvidia,tegra114-spi.yaml
@@ -0,0 +1,100 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/nvidia,tegra114-spi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVIDIA Tegra114 SPI controller
+
+maintainers:
+  - Thierry Reding <thierry.reding@gmail.com>
+  - Jon Hunter <jonathanh@nvidia.com>
+
+properties:
+  compatible:
+    oneOf:
+      - const: nvidia,tegra114-spi
+      - items:
+          - enum:
+              - nvidia,tegra210-spi
+              - nvidia,tegra124-spi
+          - const: nvidia,tegra114-spi
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: SPI module clock
+
+  clock-names:
+    items:
+      - const: spi
+
+  resets:
+    items:
+      - description: SPI module reset
+
+  reset-names:
+    items:
+      - const: spi
+
+  dmas:
+    items:
+      - description: DMA channel for the reception FIFO
+      - description: DMA channel for the transmission FIFO
+
+  dma-names:
+    items:
+      - const: rx
+      - const: tx
+
+  spi-max-frequency:
+    description: Maximum SPI clocking speed of the controller in Hz.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+allOf:
+  - $ref: spi-controller.yaml
+
+unevaluatedProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - resets
+  - reset-names
+  - dmas
+  - dma-names
+
+examples:
+  - |
+    spi@7000d600 {
+        compatible = "nvidia,tegra114-spi";
+        reg = <0x7000d600 0x200>;
+        interrupts = <0 82 0x04>;
+        clocks = <&tegra_car 44>;
+        clock-names = "spi";
+        resets = <&tegra_car 44>;
+        reset-names = "spi";
+        dmas = <&apbdma 16>, <&apbdma 16>;
+        dma-names = "rx", "tx";
+
+        spi-max-frequency = <25000000>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        flash@0 {
+            compatible = "jedec,spi-nor";
+            reg = <0>;
+            spi-max-frequency = <20000000>;
+            nvidia,rx-clk-tap-delay = <0>;
+            nvidia,tx-clk-tap-delay = <16>;
+        };
+    };