From: Lubomir Rintel Date: Tue, 13 Nov 2018 10:22:26 +0000 (+0100) Subject: spi: pxa2xx: dt-bindings: Add ready GPIO signal X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=8ae13d0b0d4bb4af99bec8c50152f0c8f5cbcc06;p=openwrt%2Fstaging%2Fblogic.git spi: pxa2xx: dt-bindings: Add ready GPIO signal 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 Reviewed-by: Geert Uytterhoeven Signed-off-by: Mark Brown --- diff --git a/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt b/Documentation/devicetree/bindings/spi/spi-pxa2xx.txt index 89b2832283e3..e30e0c2a4bce 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-gpios: 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