From 6c013679eb5c7e0b09cbcb64276f6dd97b473d12 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Sat, 3 Dec 2022 10:15:15 +0100
Subject: [PATCH] dt-bindings: crypto: Let STM32 define Ux500 CRYP

This adds device tree bindings for the Ux500 CRYP block
as a compatible in the STM32 CRYP bindings.

The Ux500 CRYP binding has been used for ages in the kernel
device tree for Ux500 but was never documented, so fill in
the gap by making it a sibling of the STM32 CRYP block,
which is what it is.

The relationship to the existing STM32 CRYP block is pretty
obvious when looking at the register map, and I have written
patches to reuse the STM32 CRYP driver on the Ux500.

The two properties added are DMA channels and power domain.
Power domains are a generic SoC feature and the STM32 variant
also has DMA channels.

Cc: devicetree@vger.kernel.org
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Lionel Debieve <lionel.debieve@foss.st.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 .../bindings/crypto/st,stm32-cryp.yaml        | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/Documentation/devicetree/bindings/crypto/st,stm32-cryp.yaml b/Documentation/devicetree/bindings/crypto/st,stm32-cryp.yaml
index ed23bf94a8e0..6759c5bf3e57 100644
--- a/Documentation/devicetree/bindings/crypto/st,stm32-cryp.yaml
+++ b/Documentation/devicetree/bindings/crypto/st,stm32-cryp.yaml
@@ -6,12 +6,18 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 
 title: STMicroelectronics STM32 CRYP bindings
 
+description: The STM32 CRYP block is built on the CRYP block found in
+  the STn8820 SoC introduced in 2007, and subsequently used in the U8500
+  SoC in 2010.
+
 maintainers:
   - Lionel Debieve <lionel.debieve@foss.st.com>
 
 properties:
   compatible:
     enum:
+      - st,stn8820-cryp
+      - stericsson,ux500-cryp
       - st,stm32f756-cryp
       - st,stm32mp1-cryp
 
@@ -27,6 +33,19 @@ properties:
   resets:
     maxItems: 1
 
+  dmas:
+    items:
+      - description: mem2cryp DMA channel
+      - description: cryp2mem DMA channel
+
+  dma-names:
+    items:
+      - const: mem2cryp
+      - const: cryp2mem
+
+  power-domains:
+    maxItems: 1
+
 required:
   - compatible
   - reg