From: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx> On FSL Layerscape SoCs, the number of lanes assigned to PCIe controller is not fixed, it is determined by the selected SerDes protocol in the RCW (Reset Configuration Word), and the PCIe link training is completed automatically base on the selected SerDes protocol, and the link width set-up is updated by hardware. So the num-lanes is not needed to specify the link width. The current num-lanes indicates the max lanes PCIe controller can support up to, instead of the lanes assigned to the PCIe controller. This can result in PCIe link training fail after hot-reset. So remove the num-lanes to avoid set-up to incorrect link width. Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@xxxxxxx> --- arch/arm/boot/dts/ls1021a.dtsi | 2 -- 1 file changed, 2 deletions(-) diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dtsi index 464df4290ffc..2f6977ada447 100644 --- a/arch/arm/boot/dts/ls1021a.dtsi +++ b/arch/arm/boot/dts/ls1021a.dtsi @@ -874,7 +874,6 @@ #address-cells = <3>; #size-cells = <2>; device_type = "pci"; - num-lanes = <4>; num-viewport = <6>; bus-range = <0x0 0xff>; ranges = <0x81000000 0x0 0x00000000 0x40 0x00010000 0x0 0x00010000 /* downstream I/O */ @@ -899,7 +898,6 @@ #address-cells = <3>; #size-cells = <2>; device_type = "pci"; - num-lanes = <4>; num-viewport = <6>; bus-range = <0x0 0xff>; ranges = <0x81000000 0x0 0x00000000 0x48 0x00010000 0x0 0x00010000 /* downstream I/O */ -- 2.17.1
