Re: [PATCH 2/4] hwrng: stm32 - implement support for STM32MP25x platforms

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On 10/11/24 11:55 AM, Gatien CHEVALLIER wrote:


On 10/7/24 15:54, Marek Vasut wrote:
On 10/7/24 3:27 PM, Gatien Chevallier wrote:
Implement the support for STM32MP25x platforms. On this platform, a
security clock is shared between some hardware blocks. For the RNG,
it is the RNG kernel clock. Therefore, the gate is no more shared
between the RNG bus and kernel clocks as on STM32MP1x platforms and
the bus clock has to be managed on its own.

Signed-off-by: Gatien Chevallier <gatien.chevallier@xxxxxxxxxxx>
A bit of a higher-level design question -- can you use drivers/clk/ clk-bulk.c clk_bulk_*() to handle all these disparate count of clock easily ?

Hi, I'd like to make sure that we enable the core clock before the bus
clock so that the RNG hardware block can start its internal tests while
we ungate the bus clock. It's not a strong opinion but it feels better.
Maybe this could still work if the struct clk_bulk_data {} is ordered that way, so the bus clock are first, and the rest afterward ?




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