mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 04:42:12 +00:00
88154c96ee
This adds ability for the arc_emac to really handle its supplying clock. To get the needed clock-frequency either a real clock or the previous clock-frequency property must be provided. Signed-off-by: Heiko Stuebner <heiko@sntech.de> Tested-by: Max Schwarz <max.schwarz@online.de> Signed-off-by: David S. Miller <davem@davemloft.net>
40 lines
1.0 KiB
Plaintext
40 lines
1.0 KiB
Plaintext
* Synopsys ARC EMAC 10/100 Ethernet driver (EMAC)
|
|
|
|
Required properties:
|
|
- compatible: Should be "snps,arc-emac"
|
|
- reg: Address and length of the register set for the device
|
|
- interrupts: Should contain the EMAC interrupts
|
|
- max-speed: see ethernet.txt file in the same directory.
|
|
- phy: see ethernet.txt file in the same directory.
|
|
|
|
Clock handling:
|
|
The clock frequency is needed to calculate and set polling period of EMAC.
|
|
It must be provided by one of:
|
|
- clock-frequency: CPU frequency.
|
|
- clocks: reference to the clock supplying the EMAC.
|
|
|
|
Child nodes of the driver are the individual PHY devices connected to the
|
|
MDIO bus. They must have a "reg" property given the PHY address on the MDIO bus.
|
|
|
|
Examples:
|
|
|
|
ethernet@c0fc2000 {
|
|
compatible = "snps,arc-emac";
|
|
reg = <0xc0fc2000 0x3c>;
|
|
interrupts = <6>;
|
|
mac-address = [ 00 11 22 33 44 55 ];
|
|
|
|
clock-frequency = <80000000>;
|
|
/* or */
|
|
clocks = <&emac_clock>;
|
|
|
|
max-speed = <100>;
|
|
phy = <&phy0>;
|
|
|
|
#address-cells = <1>;
|
|
#size-cells = <0>;
|
|
phy0: ethernet-phy@0 {
|
|
reg = <1>;
|
|
};
|
|
};
|