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

[Maxime Ripard]

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

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
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