Re: Question about SPI_CS_HIGH setting when use controller->use_gpio_descriptors

[Linus Walleij <linus.walleij@xxxxxxxxxx>]

On Mon, Dec 7, 2020 at 8:41 AM Bough Chen <haibo.chen@xxxxxxx> wrote:

> I try to change the cs-gpios to GPIO_ACTIVE_LOW, seems this io extender still can work fine. Seems a bit wired.

It's because as discussed in one of the threads, unfortunately the semantics
are ambiguous so we let the SPI-specific cs-active-high attribute control
it exclusively. GPIO_ACTIVE_LOW gets ignored. We haven't found
any other way.

Yours,
Linus Walleij