Re: [PATCH] spi: tegra114: initialize native chip selects inactive

[Jon Hunter]

On 28/07/2026 03:53, Abraham Zukor wrote:
> On 27/07/2026 13:07, Jon Hunter wrote:
> > What about the case where the SPI devices CS is active high or a
> > mixture of the two?
>
> An all-active-high bus is the case the window gets right today: probe
> writes zero to the field, so an active-high CS idles deasserted and an
> active-low one sits asserted. This patch inverts that. No single
> constant covers a mixed board - one polarity or the other is asserted
> until tegra_spi_setup() runs for that device - so the question is
> which default is the right one, and active low is what the SPI core
> assumes when a device says nothing.

Exactly. That's my point. Which is the right one? The answer is probably 
neither, but whatever is present on the bus.

--
nvpublic