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dt-bindings: marvell,prestera: Add description for device-tree bindings

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Add brief description how to configure base mac address binding in
device-tree.

Describe requirement for the PCI port which is connected to the ASIC, to
allow access to the firmware related registers.

Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vadym Kochan 2020-09-16 19:31:02 +03:00 committed by David S. Miller
parent e1189d9a5f
commit 40acc05271
1 changed files with 34 additions and 0 deletions
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34
Documentation/devicetree/bindings/net/marvell,prestera.txt
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@ -45,3 +45,37 @@ dfx-server {
ranges = <0 MBUS_ID(0x08, 0x00) 0 0x100000>;
reg = <MBUS_ID(0x08, 0x00) 0 0x100000>;
};
Marvell Prestera SwitchDev bindings
-----------------------------------
Optional properties:
- compatible: must be "marvell,prestera"
- base-mac-provider: describes handle to node which provides base mac address,
might be a static base mac address or nvme cell provider.
Example:
eeprom_mac_addr: eeprom-mac-addr {
compatible = "eeprom,mac-addr-cell";
status = "okay";
nvmem = <&eeprom_at24>;
};
prestera {
compatible = "marvell,prestera";
status = "okay";
base-mac-provider = <&eeprom_mac_addr>;
};
The current implementation of Prestera Switchdev PCI interface driver requires
that BAR2 is assigned to 0xf6000000 as base address from the PCI IO range:
&cp0_pcie0 {
ranges = <0x81000000 0x0 0xfb000000 0x0 0xfb000000 0x0 0xf0000
0x82000000 0x0 0xf6000000 0x0 0xf6000000 0x0 0x2000000
0x82000000 0x0 0xf9000000 0x0 0xf9000000 0x0 0x100000>;
phys = <&cp0_comphy0 0>;
status = "okay";
};