[PATCH] spi: spi-sun6i: implement DMA-based transfer mode

[Alexander Kochetkov]

> 19 окт. 2020 г., в 11:21, Maxime Ripard <maxime at cerno.tech> написал(а):
> 
> Hi!
> 
> On Thu, Oct 15, 2020 at 06:47:40PM +0300, Alexander Kochetkov wrote:
>> DMA-based transfer will be enabled if data length is larger than FIFO size
>> (64 bytes for A64). This greatly reduce number of interrupts for
>> transferring data.
>> 
>> For smaller data size PIO mode will be used. In PIO mode whole buffer will
>> be loaded into FIFO.
>> 
>> If driver failed to request DMA channels then it fallback for PIO mode.
>> 
>> Tested on SOPINE (https://www.pine64.org/sopine/)
>> 
>> Signed-off-by: Alexander Kochetkov <al.kochet at gmail.com>
> 
> Thanks for working on this, it's been a bit overdue

Hi, Maxime!

We did custom A64 based computation module for our product.
Do you mean that A64 is obsolete or EOL product?
If so, can you recommend active replacement for A64 from Allwinner same price?

Alexander