Add support for Airoha EN7581 True Random Number generator. This module can generate up to 4bytes of raw data at times and support self health test at startup. The module gets noise for randomness from various source from ADC, AP, dedicated clocks and other devices attached to the SoC producing true random numbers. Signed-off-by: Christian Marangi <ansuelsmth@xxxxxxxxx> Reviewed-by: Rob Herring (Arm) <robh@xxxxxxxxxx> --- Changes v2: - Add Reviewed-by tag .../bindings/rng/airoha,en7581-trng.yaml | 38 +++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 Documentation/devicetree/bindings/rng/airoha,en7581-trng.yaml diff --git a/Documentation/devicetree/bindings/rng/airoha,en7581-trng.yaml b/Documentation/devicetree/bindings/rng/airoha,en7581-trng.yaml new file mode 100644 index 000000000000..dfc6d24ee7d9 --- /dev/null +++ b/Documentation/devicetree/bindings/rng/airoha,en7581-trng.yaml @@ -0,0 +1,38 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/rng/airoha,en7581-trng.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Airoha EN7851 True Random Number Generator + +maintainers: + - Christian Marangi <ansuelsmth@xxxxxxxxx> + +properties: + compatible: + const: airoha,en7581-trng + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + +required: + - compatible + - reg + - interrupts + +additionalProperties: false + +examples: + - | + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + + rng@1faa1000 { + compatible = "airoha,en7581-trng"; + reg = <0x1faa1000 0x1000>; + interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>; + }; -- 2.45.2
