[PATCH v2 0/4] Add support for stm32mp25x RNG

Gatien Chevallier
2024-10-11T15:47:57Z

This patchset adds support for the Random Number
Generator(RNG) present on the stm32mp25x platforms.
On these platforms, the clock management and the RNG
parameters are different.

While there, update the RNG max clock frequency on
stm32mp15 platforms according to the latest specs.

Tested on the stm32mp257f-ev1 platform with a deep
power sequence with rngtest before/after the sequence with
satisfying results.

Same was done on stm32mp135f-dk to make sure no regression was added.

On stm32mp157c-dk2, I didn't perform a power sequence but the rngtest
results were satisfying.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
---
Changes in V2:
-Fixes in bindings
-Removed MP25 RNG example
-Renamed RNG clocks for mp25 to "core" and "bus"

---
Gatien Chevallier (4):
dt-bindings: rng: add st,stm32mp25-rng support
hwrng: stm32 - implement support for STM32MP25x platforms
hwrng: stm32 - update STM32MP15 RNG max clock frequency
arm64: dts: st: add RNG node on stm32mp251

.../devicetree/bindings/rng/st,stm32-rng.yaml | 30 +++++++-
arch/arm64/boot/dts/st/stm32mp251.dtsi | 10 +++
drivers/char/hw_random/stm32-rng.c | 87 +++++++++++++++++-----
3 files changed, 107 insertions(+), 20 deletions(-)
---
base-commit: 1d227fcc72223cbdd34d0ce13541cbaab5e0d72f
change-id: 20241011-rng-mp25-v2-b6460ef11e1f

Best regards,
--
Gatien Chevallier <gatien.chevallier@foss.st.com>