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dt-bindings: net: cdns,macb: Add rx-watermark property

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watermark value is the minimum amount of packet data
required to activate the forwarding process. The watermark
implementation and maximum size is dependent on the device
where Cadence MACB/GEM is used.

Signed-off-by: Pranavi Somisetty <pranavi.somisetty@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pranavi Somisetty 2023-06-12 23:43:39 -06:00 committed by David S. Miller
parent 473f5e13b3
commit 5b32c61a2d
1 changed files with 11 additions and 0 deletions

11
Documentation/devicetree/bindings/net/cdns,macb.yaml

@ -109,6 +109,16 @@ properties:
power-domains:
maxItems: 1
cdns,rx-watermark:
$ref: /schemas/types.yaml#/definitions/uint32
description:
When the receive partial store and forward mode is activated,
the receiver will only begin to forward the packet to the external
AHB or AXI slave when enough packet data is stored in the SRAM packet buffer.
rx-watermark corresponds to the number of SRAM buffer locations,
that need to be filled, before the forwarding process is activated.
Width of the SRAM is platform dependent, and can be 4, 8 or 16 bytes.
'#address-cells':
const: 1
@ -166,6 +176,7 @@ examples:
compatible = "cdns,macb";
reg = <0xfffc4000 0x4000>;
interrupts = <21>;
cdns,rx-watermark = <0x44>;
phy-mode = "rmii";
local-mac-address = [3a 0e 03 04 05 06];
clock-names = "pclk", "hclk", "tx_clk";