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realtek: DTS: add macro for switch port with SerDes

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In the future the PCS & DSA drivers will lookup the SerDes of a
switch port via pcs-handle (like upstream does). Provide a macro
that allows to expand the existing port definitions. To link a
SerDes to port simply do

Either in short form:

replace SWITCH_PORT(0, 1, qsgmii)
with    SWITCH_PORT_SDS(0, 1, 3, qsgmii) (Link to SerDes 3)

Or in long form:

port@24 {
	reg = <24>;
	label = "lan25";
	pcs-handle = <&serdes4>; (Link to SerDes 4)
	phy-handle = <&phy24>;
	phy-mode = "1000base-x";
	managed = "in-band-status";
	sfp = <&sfp0>;
};

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/20075
Signed-off-by: Robert Marko <robimarko@gmail.com>
This commit is contained in:
Markus Stockhausen 2025-09-18 05:10:50 -04:00 committed by Robert Marko
parent e31127497c
commit 06c895f5d3
1 changed files with 14 additions and 5 deletions
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19
target/linux/realtek/dts/macros.dtsi
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@ -42,11 +42,20 @@
reg = <##n>; \
};
#define SWITCH_PORT(n, s, m) \
port##n: port@##n { \
reg = <##n>; \
label = SWITCH_PORT_LABEL(s) ; \
phy-handle = <&phy##n>; \
#define SWITCH_PORT(p, l, m) \
port##p: port@##p { \
reg = <##p>; \
label = SWITCH_PORT_LABEL(l) ; \
phy-handle = <&phy##p>; \
phy-mode = #m ; \
};
#define SWITCH_PORT_SDS(p, l, s, m) \
port##p: port@##p { \
reg = <##p>; \
label = SWITCH_PORT_LABEL(l) ; \
pcs-handle = <&serdes##s>; \
phy-handle = <&phy##p>; \
phy-mode = #m ; \
};