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| author | Lubomir Rintel <lkundrak@v3.sk> | 2018-11-13 13:22:26 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2018-11-13 21:02:00 +0300 |
| commit | 8ae13d0b0d4bb4af99bec8c50152f0c8f5cbcc06 (patch) | |
| tree | 7c3c6366fbf1d3cffdbddb5dbd07a7e19c1376a4 /Documentation/devicetree/bindings | |
| parent | ec93cb6f827b3e1a81b0721b8c893d2a5e37e7d6 (diff) | |
| download | linux-8ae13d0b0d4bb4af99bec8c50152f0c8f5cbcc06.tar.xz | |
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>
Diffstat (limited to 'Documentation/devicetree/bindings')
| -rw-r--r-- | Documentation/devicetree/bindings/spi/spi-pxa2xx.txt | 2 |
1 files changed, 2 insertions, 0 deletions
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 |