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dt-bindings: crypto: Convert Atmel AES to yaml

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Convert Atmel AES documentation to yaml format. With the conversion the
clock and clock-names properties are made mandatory. The driver returns
-EINVAL if "aes_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/20220211093922.456634-2-tudor.ambarus@microchip.com
This commit is contained in:
Tudor Ambarus 2022-02-11 11:39:20 +02:00 committed by Rob Herring
parent 2e8185fccd
commit c8f2ad6869
2 changed files with 66 additions and 20 deletions
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66
Documentation/devicetree/bindings/crypto/atmel,at91sam9g46-aes.yaml Normal file
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@ -0,0 +1,66 @@
# 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-aes.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Atmel Advanced Encryption Standard (AES) HW cryptographic accelerator
maintainers:
- Tudor Ambarus <tudor.ambarus@microchip.com>
properties:
compatible:
const: atmel,at91sam9g46-aes
reg:
maxItems: 1
interrupts:
maxItems: 1
clocks:
maxItems: 1
clock-names:
const: aes_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
- dmas
- dma-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>
aes: crypto@e1810000 {
compatible = "atmel,at91sam9g46-aes";
reg = <0xe1810000 0x100>;
interrupts = <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&pmc PMC_TYPE_PERIPHERAL 27>;
clock-names = "aes_clk";
dmas = <&dma0 AT91_XDMAC_DT_PERID(1)>,
<&dma0 AT91_XDMAC_DT_PERID(2)>;
dma-names = "tx", "rx";
};

20
Documentation/devicetree/bindings/crypto/atmel-crypto.txt
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@ -2,26 +2,6 @@
These are the HW cryptographic accelerators found on some Atmel products.
* Advanced Encryption Standard (AES)
Required properties:
- compatible : Should be "atmel,at91sam9g46-aes".
- reg: Should contain AES registers location and length.
- interrupts: Should contain the IRQ line for the AES.
- 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:
aes@f8038000 {
compatible = "atmel,at91sam9g46-aes";
reg = <0xf8038000 0x100>;
interrupts = <43 4 0>;
dmas = <&dma1 2 18>,
<&dma1 2 19>;
dma-names = "tx", "rx";
* Triple Data Encryption Standard (Triple DES)
Required properties: