[PATCH v2 11/12] ARM: dts: suniv: F1C100: add SPI support

[Samuel Holland]

On 3/17/22 11:23 AM, Andre Przywara wrote:
> The F1C100 series contains two SPI controllers, and many boards use SPI0
> for a SPI flash, as the BROM is able to boot from that.
> 
> Describe the two controllers in the SoC .dtsi, and also add the PortC
> pins for SPI0, since this is where BROM looks at when trying to boot
> from the commonly used SPI flash.
> 
> The SPI controller seems to be the same as in the H3 chips, but it lacks
> a separate mod clock. The manual says it's connected to AHB directly.
> We don't export that AHB clock directly, but can use the AHB *gate* clock
> as a clock source, since the SPI driver is not supposed to change the AHB
> frequency anyway.
> 
> Signed-off-by: Andre Przywara <andre.przywara at arm.com>

Acked-by: Samuel Holland <samuel at sholland.org>