[RFC PATCH v1 2/3] spi: sunxi: Add support for R329/D1/R528/T113 SPI controller

[Sam Edwards]

Hi Maxim,

By any chance do you happen to know when in sunxi history the SPI 
controller grew QuadSPI/DualSPI support? It'd probably be feature creep 
to have in this patch series, but since they don't look too hard to 
implement, I might be interested in taking a stab at supporting them.

On 5/19/23 07:40, Maxim Kiselev wrote:
> These SoCs have two SPI controllers that are quite similar to the SPI
> on previous Allwinner SoCs. The main difference is that new SoCs
> don't have a clock divider (SPI_CCR register) inside SPI IP.
> 
> Instead SPI sample mode should be configured depending on the input clock.
> 
> For now SPI input clock source selection is not supported by this driver,
> and only HOSC at 24MHz can be used as input clock. Therefore, according to
> the, manual we could change the SPI sample mode from delay half
> cycle(default) to normal.
> 
> This patch adds a quirk for this kind of SPI controllers
> 
> Signed-off-by: Maxim Kiselev <bigunclemax at gmail.com>

Tested-by: Sam Edwards <CFSworks at gmail.com>

Cheers,
Sam