[PATCH v2 0/3] Raspberry Pi 4 HWRNG Support

Stephen Brennan
2019-11-19T06:14:35Z

This patch series enables support for the HWRNG included on the Raspberry
Pi 4. It is simply a rebase of Stefan's branch [1]. I went ahead and
tested this out on a Pi 4. Prior to this patch series, attempting to use
the hwrng gives:

$ head -c 2 /dev/hwrng
head: /dev/hwrng: Input/output error

After this series, the same command gives two random bytes.

Changes in v2:
- specify the correct size for the region in the dts, refactor bcm283x rng

---

Stefan Wahren (2):
dt-bindings: rng: add BCM2711 RNG compatible
hwrng: iproc-rng200: Add support for BCM2711

Stephen Brennan (1):
ARM: dts: bcm2711: Enable HWRNG support

.../devicetree/bindings/rng/brcm,iproc-rng200.txt | 1 +
arch/arm/boot/dts/bcm2711.dtsi | 6 +++---
arch/arm/boot/dts/bcm2835.dtsi | 1 +
arch/arm/boot/dts/bcm2836.dtsi | 1 +
arch/arm/boot/dts/bcm2837.dtsi | 1 +
arch/arm/boot/dts/bcm283x-common.dtsi | 11 +++++++++++
arch/arm/boot/dts/bcm283x.dtsi | 6 ------
drivers/char/hw_random/Kconfig | 2 +-
drivers/char/hw_random/iproc-rng200.c | 1 +
9 files changed, 20 insertions(+), 10 deletions(-)
create mode 100644 arch/arm/boot/dts/bcm283x-common.dtsi

--
2.24.0