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dt-bindings: marvell,prestera: Add description for device-tree bindings
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>
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@ -45,3 +45,37 @@ dfx-server {
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ranges = <0 MBUS_ID(0x08, 0x00) 0 0x100000>;
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reg = <MBUS_ID(0x08, 0x00) 0 0x100000>;
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};
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Marvell Prestera SwitchDev bindings
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-----------------------------------
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Optional properties:
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- compatible: must be "marvell,prestera"
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- base-mac-provider: describes handle to node which provides base mac address,
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might be a static base mac address or nvme cell provider.
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Example:
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eeprom_mac_addr: eeprom-mac-addr {
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compatible = "eeprom,mac-addr-cell";
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status = "okay";
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nvmem = <&eeprom_at24>;
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};
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prestera {
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compatible = "marvell,prestera";
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status = "okay";
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base-mac-provider = <&eeprom_mac_addr>;
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};
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The current implementation of Prestera Switchdev PCI interface driver requires
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that BAR2 is assigned to 0xf6000000 as base address from the PCI IO range:
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&cp0_pcie0 {
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ranges = <0x81000000 0x0 0xfb000000 0x0 0xfb000000 0x0 0xf0000
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0x82000000 0x0 0xf6000000 0x0 0xf6000000 0x0 0x2000000
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0x82000000 0x0 0xf9000000 0x0 0xf9000000 0x0 0x100000>;
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phys = <&cp0_comphy0 0>;
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status = "okay";
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};
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