[PATCH v2 3/4] arm64: dts: marvell: cn9132-clearfog: fix multi-lane pci x2 and x4 ports

[Josua Mayer]

The mvebu-comphy driver does not currently know how to pass correct
lane-count to ATF while configuring the serdes lanes.

This causes the system to hard reset during reconfiguration, if a pci
card is present and has established a link during bootloader.

Remove the comphy handles from the respective pci nodes to avoid runtime
reconfiguration, relying solely on bootloader configuration - while
avoiding the hard reset.

When bootloader has configured the lanes correctly, the pci ports are
functional under Linux.

This issue may be addressed in the comphy driver at a future point.

Fixes: e9ff907f4076 ("arm64: dts: add description for solidrun cn9132 cex7 module and clearfog board")
Cc: <stable at vger.kernel.org>
Signed-off-by: Josua Mayer <josua at solid-run.com>
---
 arch/arm64/boot/dts/marvell/cn9132-clearfog.dts | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/marvell/cn9132-clearfog.dts b/arch/arm64/boot/dts/marvell/cn9132-clearfog.dts
index 115c55d73786e2b9265e1caa4c62ee26f498fb41..6f237d3542b9102695f8a48457f43340da994a2c 100644
--- a/arch/arm64/boot/dts/marvell/cn9132-clearfog.dts
+++ b/arch/arm64/boot/dts/marvell/cn9132-clearfog.dts
@@ -413,7 +413,13 @@ fixed-link {
 /* SRDS #0,#1,#2,#3 - PCIe */
 &cp0_pcie0 {
 	num-lanes = <4>;
-	phys = <&cp0_comphy0 0>, <&cp0_comphy1 0>, <&cp0_comphy2 0>, <&cp0_comphy3 0>;
+	/*
+	 * The mvebu-comphy driver does not currently know how to pass correct
+	 * lane-count to ATF while configuring the serdes lanes.
+	 * Rely on bootloader configuration only.
+	 *
+	 * phys = <&cp0_comphy0 0>, <&cp0_comphy1 0>, <&cp0_comphy2 0>, <&cp0_comphy3 0>;
+	 */
 	status = "okay";
 };
 
@@ -475,7 +481,13 @@ &cp1_eth0 {
 /* SRDS #0,#1 - PCIe */
 &cp1_pcie0 {
 	num-lanes = <2>;
-	phys = <&cp1_comphy0 0>, <&cp1_comphy1 0>;
+	/*
+	 * The mvebu-comphy driver does not currently know how to pass correct
+	 * lane-count to ATF while configuring the serdes lanes.
+	 * Rely on bootloader configuration only.
+	 *
+	 * phys = <&cp1_comphy0 0>, <&cp1_comphy1 0>;
+	 */
 	status = "okay";
 };
 

-- 
2.51.0