linux-kernel - Re: [PATCH 0/2] hwrng: exynos: enable GS101 TRNG support

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Message-ID: <61813f89-3015-4fdb-a182-5c4159f7bb1e@linaro.org>
Date: Wed, 22 Oct 2025 12:24:31 +0100
From: Tudor Ambarus <tudor.ambarus@...aro.org>
To: Łukasz Stelmach <l.stelmach@...sung.com>,
 Olivia Mackall <olivia@...enic.com>, Herbert Xu
 <herbert@...dor.apana.org.au>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>,
 Peter Griffin <peter.griffin@...aro.org>,
 André Draszik <andre.draszik@...aro.org>
Cc: Krzysztof Kozlowski <krzk@...nel.org>, semen.protsenko@...aro.org,
 willmcvicker@...gle.com, kernel-team@...roid.com,
 linux-samsung-soc@...r.kernel.org, linux-crypto@...r.kernel.org,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] hwrng: exynos: enable GS101 TRNG support



On 10/22/25 12:19 PM, Tudor Ambarus wrote:
> Hi,
> 
> I propose the bindings to go through the Samsung tree as well so that we
> can match the compatible with the schema when pulling the DT patch.
> 
> Thanks!
> ta
> 
> ---
> Enable GS101 TRNG support. It works well with the current Exynos850 TRNG
> support. Tested on pixel 6 like this:
> 

the commands started with # and were removed from the cover letter.
I fill them in to avoid a resubmit:

# cat /sys/devices/virtual/misc/hw_random/rng_current> 10141400.rng
> 

dd if=/dev/hwrng bs=100000 count=1 > /dev/null> 1+0 records in
> 1+0 records out
> 100000 bytes (100 kB, 98 KiB) copied, 2.03619 s, 49.1 kB/s
> 

# rngtest -c 1000 < /dev/hwrng> rngtest 6.17
> ...
> rngtest: starting FIPS tests...
> rngtest: bits received from input: 20000032
> rngtest: FIPS 140-2 successes: 1000
> rngtest: FIPS 140-2 failures: 0
> rngtest: FIPS 140-2(2001-10-10) Monobit: 0
> rngtest: FIPS 140-2(2001-10-10) Poker: 0
> rngtest: FIPS 140-2(2001-10-10) Runs: 0
> rngtest: FIPS 140-2(2001-10-10) Long run: 0
> rngtest: FIPS 140-2(2001-10-10) Continuous run: 0
> rngtest: input channel speed: (min=380.570; avg=385.422; max=386.964)Kibits/s
> rngtest: FIPS tests speed: (min=75.092; avg=81.784; max=84.771)Mibits/s
> rngtest: Program run time: 50908949 microseconds
> 
> To: Łukasz Stelmach <l.stelmach@...sung.com>
> To: Olivia Mackall <olivia@...enic.com>
> To: Herbert Xu <herbert@...dor.apana.org.au>
> To: Rob Herring <robh@...nel.org>
> To: Krzysztof Kozlowski <krzk+dt@...nel.org>
> To: Conor Dooley <conor+dt@...nel.org>
> To: Alim Akhtar <alim.akhtar@...sung.com>
> To: Peter Griffin <peter.griffin@...aro.org>
> To: André Draszik <andre.draszik@...aro.org>
> Cc: Krzysztof Kozlowski <krzk@...nel.org>
> Cc: semen.protsenko@...aro.org
> Cc: willmcvicker@...gle.com
> Cc: kernel-team@...roid.com
> Cc: linux-samsung-soc@...r.kernel.org
> Cc: linux-crypto@...r.kernel.org
> Cc: devicetree@...r.kernel.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
> 
> ---
> Tudor Ambarus (2):
>       dt-bindings: rng: add google,gs101-trng compatible
>       arm64: dts: exynos: gs101: add TRNG node
> 
>  .../devicetree/bindings/rng/samsung,exynos5250-trng.yaml       | 10 +++++++---
>  arch/arm64/boot/dts/exynos/google/gs101.dtsi                   |  9 +++++++++
>  2 files changed, 16 insertions(+), 3 deletions(-)
> ---
> base-commit: 8ebc2add3e2d076adc5cc3e8c9bef268f7f1cb31
> change-id: 20251022-gs101-trng-54b710218424
> 
> Best regards,