linux-kernel - [PATCH v3 0/4] Raspberry Pi 4 HWRNG Support

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Message-ID: <20191120031622.88949-1-stephen@brennan.io>
Date:   Tue, 19 Nov 2019 19:16:18 -0800
From:   Stephen Brennan <stephen@...nnan.io>
To:     stephen@...nnan.io
Cc:     Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Eric Anholt <eric@...olt.net>,
        Stefan Wahren <wahrenst@....net>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-crypto@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-rpi-kernel@...ts.infradead.org
Subject: [PATCH v3 0/4] Raspberry Pi 4 HWRNG Support

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 v3:
- drop interrupts from bcm2711 rng node
- move bcm283x rng into bcm2835-common.dtsi
- add reviewed-by tag
- separated out patch 3 into two parts

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 (2):
  ARM: dts: bcm2835: Move rng definition to common location
  ARM: dts: bcm2711: Enable HWRNG support

 .../devicetree/bindings/rng/brcm,iproc-rng200.txt          | 1 +
 arch/arm/boot/dts/bcm2711.dtsi                             | 7 +++----
 arch/arm/boot/dts/bcm2835-common.dtsi                      | 6 ++++++
 arch/arm/boot/dts/bcm283x.dtsi                             | 6 ------
 drivers/char/hw_random/Kconfig                             | 2 +-
 drivers/char/hw_random/iproc-rng200.c                      | 1 +
 6 files changed, 12 insertions(+), 11 deletions(-)

-- 
2.24.0