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[v3,0/4] Add support for stm32mp25x RNG

Message ID 20241015-rng-mp25-v2-v3-0-87630d73e5eb@foss.st.com
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Series Add support for stm32mp25x RNG | expand

Message

Gatien CHEVALLIER Oct. 15, 2024, 4:48 p.m. UTC 
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 v3:
- Add restriction on clock-names some compatibles
- Use clk_bulk APIs in the RNG driver to avoid manually handling clocks.
- Link to v2: https://lore.kernel.org/r/20241011-rng-mp25-v2-v2-0-76fd6170280c@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      | 34 +++++++++-
 arch/arm64/boot/dts/st/stm32mp251.dtsi             | 10 +++
 drivers/char/hw_random/stm32-rng.c                 | 76 ++++++++++++++++------
 3 files changed, 100 insertions(+), 20 deletions(-)
---
base-commit: 8e929cb546ee42c9a61d24fae60605e9e3192354
change-id: 20241011-rng-mp25-v2-b6460ef11e1f

Best regards,