spi: Update NPCM PSPI controller documentation
Update the PSPI NPCM binding document of the spi aliases use
to define the spi ID number.
Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt b/Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt
index 99606b2..1fd9a44 100644
--- a/Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt
+++ b/Documentation/devicetree/bindings/spi/nuvoton,npcm-pspi.txt
@@ -19,8 +19,16 @@
- clock-frequency : Input clock frequency to the PSPI block in Hz.
Default is 25000000 Hz.
+Aliases:
+- All the SPI controller nodes should be represented in the aliases node using
+ the following format 'spi{n}' withe the correct numbered in "aliases" node.
+
Example:
+aliases {
+ spi0 = &spi0;
+};
+
spi0: spi@f0200000 {
compatible = "nuvoton,npcm750-pspi";
reg = <0xf0200000 0x1000>;