dt-bindings: crypto: Convert Atmel TDES to yaml

Convert Atmel TDES documentation to yaml format. With the conversion the
clock and clock-names properties are made mandatory. The driver returns
-EINVAL if "tdes_clk" is not found, reflect that in the bindings and make
the clock and clock-names properties mandatory. Update the example to
better describe how one should define the dt node.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220211093922.456634-3-tudor.ambarus@microchip.com

2 files changed, 64 insertions, 23 deletions

diff --git a/Documentation/devicetree/bindings/crypto/atmel,at91sam9g46-tdes.yaml b/Documentation/devicetree/bindings/crypto/atmel,at91sam9g46-tdes.yaml
new file mode 100644
index 000000000000..fcc5adf03cad
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/atmel,at91sam9g46-tdes.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/crypto/atmel,at91sam9g46-tdes.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Atmel Triple Data Encryption Standard (TDES) HW cryptographic accelerator
+
+maintainers:
+  - Tudor Ambarus <tudor.ambarus@microchip.com>
+
+properties:
+  compatible:
+    const: atmel,at91sam9g46-tdes
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: tdes_clk
+
+  dmas:
+    items:
+      - description: TX DMA Channel
+      - description: RX DMA Channel
+
+  dma-names:
+    items:
+      - const: tx
+      - const: rx
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/at91.h>
+    #include <dt-bindings/dma/at91.h>
+
+    tdes: crypto@e2014000 {
+      compatible = "atmel,at91sam9g46-tdes";
+      reg = <0xe2014000 0x100>;
+      interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&pmc PMC_TYPE_PERIPHERAL 96>;
+      clock-names = "tdes_clk";
+      dmas = <&dma0 AT91_XDMAC_DT_PERID(54)>,
+             <&dma0 AT91_XDMAC_DT_PERID(53)>;
+      dma-names = "tx", "rx";
+    };
diff --git a/Documentation/devicetree/bindings/crypto/atmel-crypto.txt b/Documentation/devicetree/bindings/crypto/atmel-crypto.txt
index 1353ebd0dcaa..5c6541cfcc4a 100644
--- a/Documentation/devicetree/bindings/crypto/atmel-crypto.txt
+++ b/Documentation/devicetree/bindings/crypto/atmel-crypto.txt
@@ -2,29 +2,6 @@
 
 These are the HW cryptographic accelerators found on some Atmel products.
 
-* Triple Data Encryption Standard (Triple DES)
-
-Required properties:
-- compatible : Should be "atmel,at91sam9g46-tdes".
-- reg: Should contain TDES registers location and length.
-- interrupts: Should contain the IRQ line for the TDES.
-
-Optional properties:
-- dmas: List of two DMA specifiers as described in
-        atmel-dma.txt and dma.txt files.
-- dma-names: Contains one identifier string for each DMA specifier
-             in the dmas property.
-
-Example:
-tdes@f803c000 {
-	compatible = "atmel,at91sam9g46-tdes";
-	reg = <0xf803c000 0x100>;
-	interrupts = <44 4 0>;
-	dmas = <&dma1 2 20>,
-	       <&dma1 2 21>;
-	dma-names = "tx", "rx";
-};
-
 * Secure Hash Algorithm (SHA)
 
 Required properties: