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arm64: dts: ti: k3-j784s4-evm: Assign only lanes 0 and 1 to PCIe1
Currently PCIe1 is setup to use SERDES0 lanes 0 thru 3, and USB0 is setup to use SERDES0 lane 3 as well. This overlap in lanes causes the following reset related lane splat: [ 4.846266] WARNING: CPU: 4 PID: 308 at drivers/reset/core.c:792 __reset_control_get_internal+0x128/0x160 ... [ 4.846405] Call trace: [ 4.846407] __reset_control_get_internal+0x128/0x160 [ 4.846413] __of_reset_control_get+0x4e0/0x528 [ 4.846418] of_reset_control_array_get+0xa4/0x1f8 [ 4.846423] cdns_torrent_phy_probe+0xbc8/0x1068 [phy_cadence_torrent] [ 4.846445] platform_probe+0xb4/0xe8 ... [ 4.846577] cdns-torrent-phy 5060000.serdes: phy@0: failed to get reset Let's limit the PCIe1 SERDES0 lanes to 0 and 1 to avoid overlap here. This works since PCIe1 operates in x2 mode and doesn't need 4 SERDES0 lanes. Fixes: 27ce26f ("arm64: dts: ti: k3-j784s4-evm: Enable PCIe0 and PCIe1 in RC Mode") Suggested-by: Siddharth Vadapalli <[email protected]> Signed-off-by: Andrew Halaney <[email protected]> Reviewed-by: Siddharth Vadapalli <[email protected]> Link: https://lore.kernel.org/r/20240710-k3-j784s4-evm-serdes0-cleanup-v1-1-03850fe33922@redhat.com Signed-off-by: Vignesh Raghavendra <[email protected]>
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arch/arm64/boot/dts/ti/k3-j784s4-evm.dts

Lines changed: 2 additions & 3 deletions
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@@ -1391,11 +1391,10 @@
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serdes0_pcie1_link: phy@0 {
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reg = <0>;
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cdns,num-lanes = <4>;
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cdns,num-lanes = <2>;
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#phy-cells = <0>;
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cdns,phy-type = <PHY_TYPE_PCIE>;
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resets = <&serdes_wiz0 1>, <&serdes_wiz0 2>,
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<&serdes_wiz0 3>, <&serdes_wiz0 4>;
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resets = <&serdes_wiz0 1>, <&serdes_wiz0 2>;
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};
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};
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