From 7d50df8f72088eadde87e771c4b2f30bfb3688a0 Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Fri, 26 Sep 2014 22:21:20 +0000 Subject: [PATCH] Documentation: add Device tree bindings for QCA7000 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 Signed-off-by: David S. Miller --- .../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 000000000000..c74989c0d8ac --- /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 +- 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 +- 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: + +/* Freescale i.MX28 SPI master*/ +ssp2: spi@80014000 { + #address-cells = <1>; + #size-cells = <0>; + compatible = "fsl,imx28-spi"; + pinctrl-names = "default"; + pinctrl-0 = <&spi2_pins_a>; + status = "okay"; + + qca7000: ethernet@0 { + compatible = "qca,qca7000"; + reg = <0x0>; + interrupt-parent = <&gpio3>; /* GPIO Bank 3 */ + interrupts = <25 0x1>; /* Index: 25, rising edge */ + 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 ]; + }; +}; -- 2.20.1