48 lines
1.8 KiB
Plaintext
48 lines
1.8 KiB
Plaintext
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* Qualcomm QCA7000 (Ethernet over SPI protocol)
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Note: The QCA7000 is useable as a SPI device. In this case it must be defined
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as a child of a SPI master in the device tree.
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Required properties:
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- compatible : Should be "qca,qca7000"
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- reg : Should specify the SPI chip select
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- interrupts : The first cell should specify the index of the source interrupt
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and the second cell should specify the trigger type as rising edge
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- spi-cpha : Must be set
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- spi-cpol: Must be set
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Optional properties:
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- interrupt-parent : Specify the pHandle of the source interrupt
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- spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at.
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Numbers smaller than 1000000 or greater than 16000000 are invalid. Missing
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the property will set the SPI frequency to 8000000 Hertz.
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- local-mac-address: 6 bytes, MAC address
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- qca,legacy-mode : Set the SPI data transfer of the QCA7000 to legacy mode.
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In this mode the SPI master must toggle the chip select between each data
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word. In burst mode these gaps aren't necessary, which is faster.
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This setting depends on how the QCA7000 is setup via GPIO pin strapping.
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If the property is missing the driver defaults to burst mode.
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Example:
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/* Freescale i.MX28 SPI master*/
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ssp2: spi@80014000 {
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#address-cells = <1>;
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#size-cells = <0>;
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compatible = "fsl,imx28-spi";
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pinctrl-names = "default";
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pinctrl-0 = <&spi2_pins_a>;
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status = "okay";
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qca7000: ethernet@0 {
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compatible = "qca,qca7000";
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reg = <0x0>;
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interrupt-parent = <&gpio3>; /* GPIO Bank 3 */
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interrupts = <25 0x1>; /* Index: 25, rising edge */
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spi-cpha; /* SPI mode: CPHA=1 */
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spi-cpol; /* SPI mode: CPOL=1 */
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spi-max-frequency = <8000000>; /* freq: 8 MHz */
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local-mac-address = [ A0 B0 C0 D0 E0 F0 ];
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};
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};
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