Unverified Commit 8ae13d0b authored Nov 13, 2018 by Lubomir Rintel Committed by Mark Brown Nov 13, 2018

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 <lkundrak@v3.sk>
Acked-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent ec93cb6f

Documentation/devicetree/bindings/spi/spi-pxa2xx.txt

+2 −0

Original line number	Diff line number	Diff line
		@@ -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

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