[DistroKit] [PATCH 03/12] v8a: imx8mq-evk: disable PCI nodes

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

When Linux probed the PCI on the i.MX8M-EVK, the system hangs
completely. We've seen the same effect with other i.MX8M EVKs too,
where between EVK revisions, NXP changed how the PCI PHY is clocked
and because the DT only supported one variant, probing PCI on the
other variant led to system hang while probing the PCI address space.

If this turns out to be the issue on the i.MX8M-EVK as well, we should
probably try to identify what variant we run on and then fix up the DT
in the bootloader. For now though, just take the easy route and disable
PCI, which we don't use anyway.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 .../barebox-common-defaultenv/init/disable-imx8mq-pci      | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100755 configs/platform-v8a/barebox-common-defaultenv/init/disable-imx8mq-pci

diff --git a/configs/platform-v8a/barebox-common-defaultenv/init/disable-imx8mq-pci b/configs/platform-v8a/barebox-common-defaultenv/init/disable-imx8mq-pci
new file mode 100755
index 000000000000..68536e7baa5f
--- /dev/null
+++ b/configs/platform-v8a/barebox-common-defaultenv/init/disable-imx8mq-pci
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+if of_compatible -k fsl,imx8mq-evk; then
+	echo "Disabling PCI to avoid issues with older EVK revisions"
+	of_property -fs /soc@0/pcie@33800000 status disabled
+	of_property -fs /soc@0/pcie@33c00000 status disabled
+fi
-- 
2.39.2