From mboxrd@z Thu Jan 1 00:00:00 1970 From: pavel@ucw.cz (Pavel Machek) Date: Sun, 4 Nov 2018 13:13:14 +0100 Subject: [PATCH 09/11] dt-bindings: spi/spi-pxa2xx: Add ready GPIO signal In-Reply-To: <20181010170936.316862-10-lkundrak@v3.sk> References: <20181010170936.316862-1-lkundrak@v3.sk> <20181010170936.316862-10-lkundrak@v3.sk> Message-ID: <20181104121314.GU23864@amd> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 Acked-by: Pavel Machek > --- > 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 -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: