dt-bindings: qca7000-spi: Rework binding

In preparation for the QCA7000 UART binding rework the binding document.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt b/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
index c74989c0d8ac96d6561a7dde306840a8f4595547..a37f6567839983f935fb980159573ef12a047996 100644 (file)
--- a/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
+++ b/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
@@ -1,29 +1,38 @@
-* Qualcomm QCA7000 (Ethernet over SPI protocol)
+* Qualcomm QCA7000
 
-Note: The QCA7000 is useable as a SPI device. In this case it must be defined
-as a child of a SPI master in the device tree.
+The QCA7000 is a serial-to-powerline bridge with a host interface which could
+be configured either as SPI or UART slave. This configuration is done by
+the QCA7000 firmware.
+
+(a) Ethernet over SPI
+
+In order to use the QCA7000 as SPI device it must be defined as a child of a
+SPI master in the device tree.
 
 Required properties:
-- compatible : Should be "qca,qca7000"
-- reg : Should specify the SPI chip select
-- interrupts : The first cell should specify the index of the source interrupt
-  and the second cell should specify the trigger type as rising edge
-- spi-cpha : Must be set
-- spi-cpol: Must be set
+- compatible       : Should be "qca,qca7000"
+- reg              : Should specify the SPI chip select
+- interrupts       : The first cell should specify the index of the source
+                     interrupt and the second cell should specify the trigger
+                     type as rising edge
+- spi-cpha         : Must be set
+- spi-cpol         : Must be set
 
 Optional properties:
-- interrupt-parent : Specify the pHandle of the source interrupt
+- interrupt-parent  : Specify the pHandle of the source interrupt
 - spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at.
-  Numbers smaller than 1000000 or greater than 16000000 are invalid. Missing
-  the property will set the SPI frequency to 8000000 Hertz.
-- local-mac-address: 6 bytes, MAC address
-- qca,legacy-mode : Set the SPI data transfer of the QCA7000 to legacy mode.
-  In this mode the SPI master must toggle the chip select between each data
-  word. In burst mode these gaps aren't necessary, which is faster.
-  This setting depends on how the QCA7000 is setup via GPIO pin strapping.
-  If the property is missing the driver defaults to burst mode.
-
-Example:
+                     Numbers smaller than 1000000 or greater than 16000000
+                     are invalid. Missing the property will set the SPI
+                     frequency to 8000000 Hertz.
+- local-mac-address : see ./ethernet.txt
+- qca,legacy-mode   : Set the SPI data transfer of the QCA7000 to legacy mode.
+                     In this mode the SPI master must toggle the chip select
+                     between each data word. In burst mode these gaps aren't
+                     necessary, which is faster. This setting depends on how
+                     the QCA7000 is setup via GPIO pin strapping. If the
+                     property is missing the driver defaults to burst mode.
+
+SPI Example:
 
 /* Freescale i.MX28 SPI master*/
 ssp2: spi@80014000 {