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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