Hello.
On 07/01/2014 08:36 PM, Stefan Wahren wrote:
This patch adds the Device tree bindings for the
Ethernet over SPI protocol driver of the Qualcomm
QCA7000 HomePlug GreenPHY.
Signed-off-by: Stefan Wahren <[email protected]>
---
.../devicetree/bindings/net/qca-qca7000-spi.txt | 47 ++++++++++++++++++++
1 file changed, 47 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
diff --git a/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
b/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
new file mode 100644
index 0000000..66ff588
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
@@ -0,0 +1,47 @@
+* Qualcomm QCA7000 (Ethernet over SPI protocol)
+
+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.
+
+Required properties:
+- compatible : Should be "qca,qca7000"
+- reg : Should specify the SPI chip select
+- interrupt-parent : Should specify the pHandle of the source interrupt
This property is not really required, it could be inherited from an
upper-level node.
+- 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:
+- 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
s/mac/MAC/.
+- 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:
+
+/* Freescale i.MX28 SPI master*/
+ssp2: ssp@80014000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "fsl,imx28-spi";
+ pinctrl-names = "default";
+ pinctrl-0 = <&spi2_pins_a>;
+ status = "okay";
+
+ qca7000@0 {
According to the ePAPR standard [1]:
The name of a node should be somewhat generic, reflecting the function of the
device and not its precise programming model. If appropriate, the name should
be one of the following choices:
[...]
- ethernet;
+ compatible = "qca,qca7000";
+ interrupt-parent = <&gpio3>; /* GPIO Bank 3 */
+ interrupts = <25 0x1>; /* Index: 25, rising edge */
+ reg = <0x0>;
+ spi-cpha; /* SPI mode: CPHA=1 */
+ spi-cpol; /* SPI mode: CPOL=1 */
+ spi-max-frequency = <8000000>; /* freq: 8 MHz */
+ local-mac-address = [ A0 B0 C0 D0 E0 F0 ];
+ };
+};
[1] http://www.power.org/resources/downloads/Power_ePAPR_APPROVED_v1.0.pdf
WBR, Sergei
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