This patch series adds kernel support for StarFive hardware random number generator. First 2 patches add binding docs and device driver for this module. Patch 3 adds devicetree entry for VisionFive 2 SoC. Patch 3 needs to be applied on top of: https://patchwork.kernel.org/project/linux-riscv/patch/20221220011247.35560-7-hal.feng@xxxxxxxxxxxxxxxx/ Patch 3 also depends on additional clock and reset patches for stg domain that are yet to be submitted to mailing list. Changes v3 -> v4: - move init completion before IRQ registration to be prepared for spurious interrupts. (Herbert) - add locks to guard concurrent write to same register in Patch 2. (Herbert) Changes v2 -> v3: - use constant usecs and convert to jiffies in Patch 2. (Herbert) - remove sleep in irq handler in Patch 2. (Herbert) - limit wait timer to 40us if wait == 0 for trng read. (Herbert) Changes v1 -> v2: - updated of_match_ptr and added pm_sleep_ptr in Patch 2. (by Krzysztof) - drop "status" in dts as module is always on in Patch 3. (by Krzysztof) Jia Jie Ho (3): dt-bindings: rng: Add StarFive TRNG module hwrng: starfive - Add TRNG driver for StarFive SoC riscv: dts: starfive: Add TRNG node for VisionFive 2 .../bindings/rng/starfive,jh7110-trng.yaml | 55 +++ MAINTAINERS | 6 + arch/riscv/boot/dts/starfive/jh7110.dtsi | 10 + drivers/char/hw_random/Kconfig | 11 + drivers/char/hw_random/Makefile | 1 + drivers/char/hw_random/starfive-trng.c | 397 ++++++++++++++++++ 6 files changed, 480 insertions(+) create mode 100644 Documentation/devicetree/bindings/rng/starfive,jh7110-trng.yaml create mode 100644 drivers/char/hw_random/starfive-trng.c -- 2.25.1
