[PATCH 2/6] spi: sun4i: restrict transfer length in PIO-mode

[Sergey Suloev]

On 04/03/2018 11:10 AM, Maxime Ripard wrote:
> On Thu, Mar 29, 2018 at 09:59:03PM +0300, Sergey Suloev wrote:
>> There is no need to handle 3/4 empty/full interrupts as the maximum
>> supported transfer length in PIO mode is 64 bytes for sun4i-family
>> SoCs.
> That assumes that you'll be able to treat the FIFO full interrupt and
> drain the FIFO before we have the next byte coming in. This would
> require a real time system, and we're not in one of them.
>
> Maxime
>
>
>
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so you think we should still handle 3/4 FIFO full ?