Re: [PATCH RFC V2 1/2] Documentation: add Device tree bindings for QCA7000
From: Sergei Shtylyov <hidden>
Date: 2014-07-01 17:33:05
Also in:
netdev
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 <redacted> --- .../devicetree/bindings/net/qca-qca7000-spi.txt | 47 ++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/devicetree/bindings/net/qca-qca7000-spi.txt
quoted hunk ↗ jump to hunk
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