aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation/powerpc
diff options
context:
space:
mode:
authorErnst Schwab <eschwab@online.de>2010-02-17 14:33:02 (GMT)
committerGrant Likely <grant.likely@secretlab.ca>2010-02-17 14:33:02 (GMT)
commit85cd7467f3a66800c20815d3fca45d33038b9279 (patch)
tree2a6a2c4cce77338101f29f94ae86de2caa52704b /Documentation/powerpc
parente9cb0a49247ea6b3cd078716bcdcbd5d911e76ac (diff)
powerpc/of: added documentation for spi chipselects
Added devicetree binding documentation for gpios used as chipselect. The code to evaluate these is already present in spi_mpc8xxx.c. Signed-off-by: Ernst Schwab <eschwab@online.de> Reviewed-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'Documentation/powerpc')
-rw-r--r--Documentation/powerpc/dts-bindings/fsl/spi.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/powerpc/dts-bindings/fsl/spi.txt b/Documentation/powerpc/dts-bindings/fsl/spi.txt
index e7d9a34..80510c0 100644
--- a/Documentation/powerpc/dts-bindings/fsl/spi.txt
+++ b/Documentation/powerpc/dts-bindings/fsl/spi.txt
@@ -13,6 +13,11 @@ Required properties:
- interrupt-parent : the phandle for the interrupt controller that
services interrupts for this device.
+Optional properties:
+- gpios : specifies the gpio pins to be used for chipselects.
+ The gpios will be referred to as reg = <index> in the SPI child nodes.
+ If unspecified, a single SPI device without a chip select can be used.
+
Example:
spi@4c0 {
cell-index = <0>;
@@ -21,4 +26,6 @@ Example:
interrupts = <82 0>;
interrupt-parent = <700>;
mode = "cpu";
+ gpios = <&gpio 18 1 // device reg=<0>
+ &gpio 19 1>; // device reg=<1>
};

Privacy Policy