[Linux-stm32] [03/12] bus: stm32-fmc2-ebi: add STM32 FMC2 EBI controller driver

[Marek Vasut]

On 3/30/20 11:19 AM, Christophe Kerello wrote:
> 
> 
> On 3/30/20 3:24 AM, Marek Vasut wrote:
>> On 3/23/20 3:58 PM, Christophe Kerello wrote:
>>> The driver adds the support for the STMicroelectronics FMC2 EBI
>>> controller
>>> found on STM32MP SOCs.
>>>
>>
>> On DH STM32MP1 SoM in PDK2 carrier board,
>> Tested-by: Marek Vasut <marex at denx.de>
>>
>> btw. it seems this sets BTRx DATLAT and CLKDIV to 0xf , it's "Don't
>> care" in the datasheet for Muxed mode, but then it should probably be
>> set to 0.
> 
> Hi Marek,

Hi,

> Thanks for testing.

Sure

> These 2 bit fields (BTRx DATLAT and CLKDIV) are only needed for
> synchronous transactions. Based on your bindings, the transaction type
> is asynchronous.
> CLKDIV bit fields should not be set to 0x0, as this value is reserved
> for this bit field. The driver keeps the reset value when it is not
> needed to update a bit field.

Then I guess that's fine either way.