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+* Qualcomm QCA7000
+
+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
+
+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.
+- 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.
+
+The MAC address will be determined using the optional properties
+defined in ethernet.txt.
+
+SPI 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>;
+
+ 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 ];
+ };
+};
+
+(b) Ethernet over UART
+
+In order to use the QCA7000 as UART slave it must be defined as a child of a
+UART master in the device tree. It is possible to preconfigure the UART
+settings of the QCA7000 firmware, but it's not possible to change them during
+runtime.
+
+Required properties:
+- compatible : Should be "qca,qca7000"
+
+Optional properties:
+- local-mac-address : see ./ethernet.txt
+- current-speed : current baud rate of QCA7000 which defaults to 115200
+ if absent, see also ../serial/serial.yaml
+
+UART Example:
+
+/* Freescale i.MX28 UART */
+auart0: serial@8006a000 {
+ compatible = "fsl,imx28-auart", "fsl,imx23-auart";
+ reg = <0x8006a000 0x2000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&auart0_2pins_a>;
+
+ qca7000: ethernet {
+ compatible = "qca,qca7000";
+ local-mac-address = [ A0 B0 C0 D0 E0 F0 ];
+ current-speed = <38400>;
+ };
+};