e02c7a2014
Backport support for RK3588 hardware RNG driver. Signed-off-by: Marty Jones <mj8263788@gmail.com> Link: https://github.com/openwrt/openwrt/pull/19366 Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
91 lines
2.6 KiB
Diff
91 lines
2.6 KiB
Diff
From e00fc3d6e7c2d0b2ab5cf03a576df39cd94479aa Mon Sep 17 00:00:00 2001
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From: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
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Date: Tue, 4 Feb 2025 16:35:47 +0100
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Subject: [PATCH] dt-bindings: rng: add binding for Rockchip RK3588 RNG
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The Rockchip RK3588 SoC has two hardware RNGs accessible to the
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non-secure world: an RNG in the Crypto IP, and a standalone RNG that is
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new to this SoC.
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Add a binding for this new standalone RNG. It is distinct hardware from
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the existing rockchip,rk3568-rng, and therefore gets its own binding as
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the two hardware IPs are unrelated other than both being made by the
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same vendor.
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The RNG is capable of firing an interrupt when entropy is ready.
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The reset is optional, as the hardware does a power-on reset, and
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functions without the software manually resetting it.
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Signed-off-by: Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
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Acked-by: Conor Dooley <conor.dooley@microchip.com>
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Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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---
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.../bindings/rng/rockchip,rk3588-rng.yaml | 60 +++++++++++++++++++
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MAINTAINERS | 1 +
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2 files changed, 61 insertions(+)
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create mode 100644 Documentation/devicetree/bindings/rng/rockchip,rk3588-rng.yaml
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--- /dev/null
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+++ b/Documentation/devicetree/bindings/rng/rockchip,rk3588-rng.yaml
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@@ -0,0 +1,60 @@
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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+%YAML 1.2
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+---
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+$id: http://devicetree.org/schemas/rng/rockchip,rk3588-rng.yaml#
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+$schema: http://devicetree.org/meta-schemas/core.yaml#
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+
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+title: Rockchip RK3588 TRNG
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+
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+description: True Random Number Generator on Rockchip RK3588 SoC
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+
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+maintainers:
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+ - Nicolas Frattaroli <nicolas.frattaroli@collabora.com>
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+
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+properties:
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+ compatible:
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+ enum:
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+ - rockchip,rk3588-rng
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+
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+ reg:
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+ maxItems: 1
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+
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+ clocks:
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+ items:
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+ - description: TRNG AHB clock
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+
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+ interrupts:
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+ maxItems: 1
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+
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+ resets:
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+ maxItems: 1
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+
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+required:
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+ - compatible
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+ - reg
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+ - clocks
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+ - interrupts
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+
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+additionalProperties: false
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+
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+examples:
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+ - |
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+ #include <dt-bindings/clock/rockchip,rk3588-cru.h>
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+ #include <dt-bindings/interrupt-controller/arm-gic.h>
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+ #include <dt-bindings/interrupt-controller/irq.h>
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+ #include <dt-bindings/reset/rockchip,rk3588-cru.h>
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+ bus {
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+ #address-cells = <2>;
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+ #size-cells = <2>;
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+
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+ rng@fe378000 {
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+ compatible = "rockchip,rk3588-rng";
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+ reg = <0x0 0xfe378000 0x0 0x200>;
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+ interrupts = <GIC_SPI 400 IRQ_TYPE_LEVEL_HIGH 0>;
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+ clocks = <&scmi_clk SCMI_HCLK_SECURE_NS>;
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+ resets = <&scmi_reset SCMI_SRST_H_TRNG_NS>;
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+ status = "okay";
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+ };
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+ };
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+
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+...
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