linux-kernel - [PATCH 2/3] dt-bindings: crypto: Convert Atmel TDES to yaml

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Date:   Mon, 7 Feb 2022 05:24:04 +0200
From:   Tudor Ambarus <tudor.ambarus@...rochip.com>
To:     <herbert@...dor.apana.org.au>, <robh+dt@...nel.org>
CC:     <davem@...emloft.net>, <nicolas.ferre@...rochip.com>,
        <claudiu.beznea@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <linux-crypto@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        "Tudor Ambarus" <tudor.ambarus@...rochip.com>
Subject: [PATCH 2/3] 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@...rochip.com>
---
 .../bindings/crypto/atmel,tdes.yaml           | 63 +++++++++++++++++++
 .../bindings/crypto/atmel-crypto.txt          | 23 -------
 2 files changed, 63 insertions(+), 23 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/crypto/atmel,tdes.yaml

diff --git a/Documentation/devicetree/bindings/crypto/atmel,tdes.yaml b/Documentation/devicetree/bindings/crypto/atmel,tdes.yaml
new file mode 100644
index 000000000000..7efa5e4acaa1
--- /dev/null
+++ b/Documentation/devicetree/bindings/crypto/atmel,tdes.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/crypto/atmel,tdes.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Atmel Triple Data Encryption Standard (TDES) HW cryptographic accelerator
+
+maintainers:
+  - Tudor Ambarus <tudor.ambarus@...rochip.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: tdes@...14000 {
+      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";
+      status = "okay";
+    };
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@...3c000 {
-	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:
-- 
2.25.1