mirror of https://gitee.com/openkylin/linux.git
48 lines
1.8 KiB
Plaintext
48 lines
1.8 KiB
Plaintext
* 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 ];
|
|
};
|
|
};
|