[v2,0/3] Raspberry Pi 4 HWRNG Support
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Message ID 20191119061407.69911-1-stephen@brennan.io
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  • Raspberry Pi 4 HWRNG Support
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Stephen Brennan Nov. 19, 2019, 6:14 a.m. UTC
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

Comments

Herbert Xu Dec. 11, 2019, 9:33 a.m. UTC | #1
On Mon, Nov 18, 2019 at 10:14:04PM -0800, Stephen Brennan wrote:
> 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

Patches 1-2 applied.  Thanks.