[PATCH v2] arm64: dts: ti: k3-am69-sk: Add idle-states for remaining SERDES instances

[Hrushikesh Salunke]

In AM69 SoC there are 4 instances of the 4 lane SERDES. So in
"serdes_ln_ctrl" node there are total 16 entries in "mux-reg-mask"
property. But "idle-states" is defined only for the lanes of first two
SERDES instances. SERDES lane mapping is left at its reset state of
"zero" for all four lanes of SERDES2 and SERDES4. The reset state of
"zero" corresponds to the following configuration:

Lanes 0 and 1 of SERDES2 are unused
CPSW MAC Ports 1 and 2 mapped to lanes 2 and 3 of SERDES2
EDP Lanes 0, 1, 2 and 3 mapped to lanes 0, 1, 2 and 3 of SERDES4

For completeness, define the "idle-states" for the lanes of remaining
SERDES instances.

Signed-off-by: Hrushikesh Salunke <h-salunke at ti.com>
---
This patch is based on commit
26ffb3d6f02c  Add linux-next specific files for 20250704

Changes since v1
As pointed by out by Siddharth, setting lanes of remaining SERDES
to "unused" will cause regression on AM69-SK as these lanes are used
by CPSW and Display. Updated patch to set the desired values for
remaining serdes lanes.

Rebased on current next.

v1: https://lore.kernel.org/all/20250609115921.2380611-1-h-salunke@ti.com/

 arch/arm64/boot/dts/ti/k3-am69-sk.dts | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am69-sk.dts b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
index f28375629739..e803fa139b73 100644
--- a/arch/arm64/boot/dts/ti/k3-am69-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am69-sk.dts
@@ -1294,8 +1294,12 @@ partition at 3fc0000 {
 &serdes_ln_ctrl {
 	idle-states = <J784S4_SERDES0_LANE0_PCIE1_LANE0>, <J784S4_SERDES0_LANE1_PCIE1_LANE1>,
 		      <J784S4_SERDES0_LANE2_PCIE3_LANE0>, <J784S4_SERDES0_LANE3_USB>,
-			<J784S4_SERDES1_LANE0_PCIE0_LANE0>, <J784S4_SERDES1_LANE1_PCIE0_LANE1>,
-			<J784S4_SERDES1_LANE2_PCIE0_LANE2>, <J784S4_SERDES1_LANE3_PCIE0_LANE3>;
+		      <J784S4_SERDES1_LANE0_PCIE0_LANE0>, <J784S4_SERDES1_LANE1_PCIE0_LANE1>,
+		      <J784S4_SERDES1_LANE2_PCIE0_LANE2>, <J784S4_SERDES1_LANE3_PCIE0_LANE3>,
+		      <J784S4_SERDES2_LANE0_IP2_UNUSED>, <J784S4_SERDES2_LANE1_IP2_UNUSED>,
+		      <J784S4_SERDES2_LANE2_QSGMII_LANE1>, <J784S4_SERDES2_LANE3_QSGMII_LANE2>,
+		      <J784S4_SERDES4_LANE0_EDP_LANE0>, <J784S4_SERDES4_LANE1_EDP_LANE1>,
+		      <J784S4_SERDES4_LANE2_EDP_LANE2>, <J784S4_SERDES4_LANE3_EDP_LANE3>;
 };
 
 &serdes_wiz0 {
-- 
2.34.1