[PATCH 2/7] configs: default activate CONFIG_RNG_STM32 for STM32MP13x platforms

[Gatien CHEVALLIER]

On 9/8/23 20:58, Heinrich Schuchardt wrote:
> On 9/7/23 18:21, Gatien Chevallier wrote:
>> Default embed this configuration. If OP-TEE PTA RNG is present as well,
>> the priority will be given to it instead of the U-Boot driver.
> 
> Are you relying here on drivers being probed in alphabetical sequence?
> 
> Best regards
> 
> Heinrich
> 

Hello Heinrich,

I've made a strange wording here.

OP-TEE RNG PTA shouldn't be exposed if the RNG is non-secure as it
shouldn't be handled by the secure world. If it is, it is a bad
OP-TEE configuration.

On the contrary, if the RNG OPTEE PTA is exposed, then the OP-TEE
RNG PTA should be used. Therefore, the RNG node status shouldn't
be set to "okay" in U-boot's device tree.

Hope this solves the confusion, I'll reword the sentence.

Best regards,
Gatien

>>
>> Signed-off-by: Gatien Chevallier <gatien.chevallier at foss.st.com>
>> ---
>>   configs/stm32mp13_defconfig | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/configs/stm32mp13_defconfig b/configs/stm32mp13_defconfig
>> index 82b62744f6..4a899c85de 100644
>> --- a/configs/stm32mp13_defconfig
>> +++ b/configs/stm32mp13_defconfig
>> @@ -65,6 +65,7 @@ CONFIG_DM_REGULATOR_GPIO=y
>>   CONFIG_DM_REGULATOR_SCMI=y
>>   CONFIG_RESET_SCMI=y
>>   CONFIG_DM_RNG=y
>> +CONFIG_RNG_STM32=y
>>   CONFIG_DM_RTC=y
>>   CONFIG_RTC_STM32=y
>>   CONFIG_SERIAL_RX_BUFFER=y
>