[PATCH 04/24] spi: amlogic-spifc-a1: Support per spi-mem operation frequency switches

[Tudor Ambarus]

On 12/13/24 11:44 AM, Miquel Raynal wrote:
> Hi Tudor,
> 
> On 11/11/2024 at 13:42:31 GMT, Tudor Ambarus <tudor.ambarus at linaro.org> wrote:
> 
>> On 10/25/24 5:14 PM, Miquel Raynal wrote:
>>> Every ->exec_op() call correctly configures the spi bus speed to the
>>> maximum allowed frequency for the memory using the constant spi default
>>> parameter. Since we can now have per-operation constraints, let's use
>>> the value that comes from the spi-mem operation structure instead. In
>>> case there is no specific limitation for this operation, the default spi
>>> device value will be given anyway.
>>>
>>> The per-operation frequency capability is thus advertised to the spi-mem
>>> core.
>>
>> I see the driver sets ctrl->min_speed_hz = SPIFC_A1_MIN_HZ;
>>
>> Do you want to introduce a struct spi_controller_mem_ops.supports_op and
>> check that the spimem op freq is not below the controller's minimum freq?
> 
> I was about to do that but I think we can do better. I am already tuning
> the max frequency depending on the op. I can just check in the default
> supports_op hook that the operation max frequency is not below the
> controller's minimum. So all drivers with this kind of limitation will
> be covered.
> 

Sounds good!