197286f860
D1 has a crypto engine similar to the one in other Allwinner SoCs. Like H6, it has a separate MBUS clock gate. It also requires the internal RC oscillator to be enabled for the TRNG to return data, presumably because noise from the oscillator is used as an entropy source. This is likely the case for earlier variants as well, but it really only matters for H616 and newer SoCs, as H6 provides no way to disable the internal oscillator. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Acked-by: Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
102 lines
1.9 KiB
YAML
102 lines
1.9 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/crypto/allwinner,sun8i-ce.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Allwinner Crypto Engine driver
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maintainers:
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- Corentin Labbe <clabbe.montjoie@gmail.com>
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properties:
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compatible:
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enum:
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- allwinner,sun8i-h3-crypto
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- allwinner,sun8i-r40-crypto
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- allwinner,sun20i-d1-crypto
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- allwinner,sun50i-a64-crypto
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- allwinner,sun50i-h5-crypto
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- allwinner,sun50i-h6-crypto
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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items:
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- description: Bus clock
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- description: Module clock
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- description: MBus clock
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- description: TRNG clock (RC oscillator)
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minItems: 2
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clock-names:
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items:
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- const: bus
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- const: mod
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- const: ram
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- const: trng
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minItems: 2
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resets:
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maxItems: 1
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if:
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properties:
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compatible:
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enum:
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- allwinner,sun20i-d1-crypto
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then:
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properties:
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clocks:
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minItems: 4
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clock-names:
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minItems: 4
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else:
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if:
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properties:
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compatible:
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const: allwinner,sun50i-h6-crypto
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then:
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properties:
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clocks:
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minItems: 3
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maxItems: 3
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clock-names:
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minItems: 3
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maxItems: 3
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else:
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properties:
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clocks:
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maxItems: 2
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clock-names:
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maxItems: 2
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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- clock-names
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- resets
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/clock/sun50i-a64-ccu.h>
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#include <dt-bindings/reset/sun50i-a64-ccu.h>
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crypto: crypto@1c15000 {
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compatible = "allwinner,sun8i-h3-crypto";
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reg = <0x01c15000 0x1000>;
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interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&ccu CLK_BUS_CE>, <&ccu CLK_CE>;
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clock-names = "bus", "mod";
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resets = <&ccu RST_BUS_CE>;
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};
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