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| author | Nicolas Frattaroli <nicolas.frattaroli@collabora.com> | 2025-02-04 18:35:47 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2025-02-22 10:56:02 +0300 |
| commit | e00fc3d6e7c2d0b2ab5cf03a576df39cd94479aa (patch) | |
| tree | 310616f63b22ad520ec225f2871eda65ad0f641d | |
| parent | 849d9db170fc8a03ce9f64133a1d0cd46c135105 (diff) | |
| download | linux-e00fc3d6e7c2d0b2ab5cf03a576df39cd94479aa.tar.xz | |
dt-bindings: rng: add binding for Rockchip RK3588 RNG
The Rockchip RK3588 SoC has two hardware RNGs accessible to the
non-secure world: an RNG in the Crypto IP, and a standalone RNG that is
new to this SoC.
Add a binding for this new standalone RNG. It is distinct hardware from
the existing rockchip,rk3568-rng, and therefore gets its own binding as
the two hardware IPs are unrelated other than both being made by the
same vendor.
The RNG is capable of firing an interrupt when entropy is ready.
The reset is optional, as the hardware does a power-on reset, and
functions without the software manually resetting it.
Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | Documentation/devicetree/bindings/rng/rockchip,rk3588-rng.yaml | 60 | ||||
| -rw-r--r-- | MAINTAINERS | 1 |
2 files changed, 61 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/rng/rockchip,rk3588-rng.yaml b/Documentation/devicetree/bindings/rng/rockchip,rk3588-rng.yaml new file mode 100644 index 000000000000..757967212f55 --- /dev/null +++ b/Documentation/devicetree/bindings/rng/rockchip,rk3588-rng.yaml @@ -0,0 +1,60 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/rng/rockchip,rk3588-rng.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Rockchip RK3588 TRNG + +description: True Random Number Generator on Rockchip RK3588 SoC + +maintainers: + - Nicolas Frattaroli <nicolas.frattaroli@collabora.com> + +properties: + compatible: + enum: + - rockchip,rk3588-rng + + reg: + maxItems: 1 + + clocks: + items: + - description: TRNG AHB clock + + interrupts: + maxItems: 1 + + resets: + maxItems: 1 + +required: + - compatible + - reg + - clocks + - interrupts + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/rockchip,rk3588-cru.h> + #include <dt-bindings/interrupt-controller/arm-gic.h> + #include <dt-bindings/interrupt-controller/irq.h> + #include <dt-bindings/reset/rockchip,rk3588-cru.h> + bus { + #address-cells = <2>; + #size-cells = <2>; + + rng@fe378000 { + compatible = "rockchip,rk3588-rng"; + reg = <0x0 0xfe378000 0x0 0x200>; + interrupts = <GIC_SPI 400 IRQ_TYPE_LEVEL_HIGH 0>; + clocks = <&scmi_clk SCMI_HCLK_SECURE_NS>; + resets = <&scmi_reset SCMI_SRST_H_TRNG_NS>; + status = "okay"; + }; + }; + +... diff --git a/MAINTAINERS b/MAINTAINERS index 7aee4fe8bb9c..f8e76b9b4832 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -20440,6 +20440,7 @@ M: Daniel Golle <daniel@makrotopia.org> M: Aurelien Jarno <aurelien@aurel32.net> S: Maintained F: Documentation/devicetree/bindings/rng/rockchip,rk3568-rng.yaml +F: Documentation/devicetree/bindings/rng/rockchip,rk3588-rng.yaml F: drivers/char/hw_random/rockchip-rng.c ROCKCHIP RASTER 2D GRAPHIC ACCELERATION UNIT DRIVER |