1 * Marvell Armada 380/XP Buffer Manager driver (BM)
2
3 Required properties:
4
5 - compatible: should be "marvell,armada-380-neta-bm".
6 - reg: address and length of the register set for the device.
7 - clocks: a pointer to the reference clock for this device.
8 - internal-mem: a phandle to BM internal SRAM definition.
9
10 Optional properties (port):
11
12 - pool<0 : 3>,capacity: size of external buffer pointers' ring maintained
13 in DRAM. Can be set for each pool (id 0 : 3) separately. The value has
14 to be chosen between 128 and 16352 and it also has to be aligned to 32.
15 Otherwise the driver would adjust a given number or choose default if
16 not set.
17 - pool<0 : 3>,pkt-size: maximum size of a packet accepted by a given buffer
18 pointers' pool (id 0 : 3). It will be taken into consideration only when pool
19 type is 'short'. For 'long' ones it would be overridden by port's MTU.
20 If not set a driver will choose a default value.
21
22 In order to see how to hook the BM to a given ethernet port, please
23 refer to Documentation/devicetree/bindings/net/marvell-armada-370-neta.txt.
24
25 Example:
26
27 - main node:
28
29 bm: bm@c8000 {
30 compatible = "marvell,armada-380-neta-bm";
31 reg = <0xc8000 0xac>;
32 clocks = <&gateclk 13>;
33 internal-mem = <&bm_bppi>;
34 pool2,capacity = <4096>;
35 pool1,pkt-size = <512>;
36 };
37
38 - internal SRAM node:
39
40 bm_bppi: bm-bppi {
41 compatible = "mmio-sram";
42 reg = <MBUS_ID(0x0c, 0x04) 0 0x100000>;
43 ranges = <0 MBUS_ID(0x0c, 0x04) 0 0x100000>;
44 #address-cells = <1>;
45 #size-cells = <1>;
46 clocks = <&gateclk 13>;
47 };
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