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SubjectRe: [PATCH 09/11] dt-bindings: spi/spi-pxa2xx: Add ready GPIO signal
On Wed 2018-10-10 19:09:34, Lubomir Rintel wrote:
> This this is used to let the SPI master know that our FIFO is filled and
> we're ready to service a transfer. Only useful in slave mode.
>
> A signal like this is used by an embedded controller on a OLPC XO 1.75
> machine, that happens to be a SPI master.
>
> Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>

Acked-by: Pavel Machek <pavel@ucw.cz>

> ---
> Documentation/devicetree/bindings/spi/spi-pxa2xx.txt | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt b/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt
> index 89b2832283e3..681a82b40e6f 100644
> --- a/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt
> +++ b/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt
> @@ -12,6 +12,8 @@ Optional properties:
> - cs-gpios: list of GPIO chip selects. See the SPI bus bindings,
> Documentation/devicetree/bindings/spi/spi-bus.txt
> - spi-slave: Empty property indicating the SPI controller is used in slave mode.
> +- ready-gpio: GPIO used to signal a SPI master that the FIFO is filled
> + and we're ready to service a transfer. Only useful in slave mode.
>
> Child nodes represent devices on the SPI bus
> See ../spi/spi-bus.txt

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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