Messages in this thread | | | Date | Tue, 3 Apr 2018 10:10:41 +0200 | From | Maxime Ripard <> | Subject | Re: [PATCH 2/6] spi: sun4i: restrict transfer length in PIO-mode |
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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 [unhandled content-type:application/pgp-signature] | |