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| author | Hou Zhiqiang <Zhiqiang.Hou@nxp.com> | 2019-08-20 07:28:55 +0000 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2019-08-22 18:20:47 +0100 |
| commit | 568adba9eb201875bc561745e0f19b831b7e2bbc (patch) | |
| tree | 8fa07fbc565b26310dd47775ba5ef5709dc2d14c | |
| parent | 66de33f09fd97201847de7e1e2ec8a117242e1d6 (diff) | |
| download | linux-568adba9eb201875bc561745e0f19b831b7e2bbc.tar.bz2 | |
ARM: dts: ls1021a: Remove num-lanes property from PCIe nodes
Remove the num-lanes property to avoid the driver setting the
link width.
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).
The PCIe link training is completed automatically through the selected
SerDes protocol - the link width set-up is updated by hardware after
power on reset, so the num-lanes property is not needed for Layerscape
PCIe.
The current num-lanes property was added erroneously, which actually
indicates the maximum lanes the PCIe controller can support up to,
instead of the lanes assigned to the PCIe controller. The link width set
by SerDes protocol will be overridden by the num-lanes property, hence
the subsequent re-training will fail when the assigned lanes do not
match the value in the num-lanes property.
Remove the property to fix the issue.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Andrew Murray <andrew.murray@arm.com>
| -rw-r--r-- | arch/arm/boot/dts/ls1021a.dtsi | 2 |
1 files changed, 0 insertions, 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 */ |