dlan17/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

arm64: dts: apple: t8103-j457: Fix PCIe ethernet iommu-map

Browse Source 
PCIe `port01` of t8103-j457 (iMac, M1, 2 USB-C ports, 2021) is unused
and disabled. Linux' PCI subsystem assigns the ethernet nic from
`port02` to bus 02. This results into assigning `pcie0_dart_1` from the
disabled port as iommu. The `pcie0_dart_1` instance is disabled and
probably fused off (it is on the M2 Pro Mac mini which has a disabled
PCIe port as well).
Without iommu the ethernet nic is not expected work.
Adjusts the "bus-range" and the PCIe devices "reg" property to PCI
subsystem's bus number.

Fixes: 7c77ab91b3 ("arm64: dts: apple: Add missing M1 (t8103) devices")
Reviewed-by: Neal Gompa <neal@gompa.dev>
Reviewed-by: Sven Peter <sven@kernel.org>
Signed-off-by: Janne Grunau <j@jannau.net>
Link: https://lore.kernel.org/r/20250823-apple-dt-sync-6-17-v2-1-6dc0daeb4786@jannau.net
Signed-off-by: Sven Peter <sven@kernel.org>
This commit is contained in:
Janne Grunau
2025-08-31 20:26:30 +02:00
committed by Sven Peter
parent 4379305ffb
commit 6e08cdd604
1 changed files with 10 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/arm64/boot/dts/apple/t8103-j457.dts
+10 -2
View File
@@ -21,6 +21,14 @@
};
};
/*
* Adjust pcie0's iommu-map to account for the disabled port01.
*/
&pcie0 {
iommu-map = <0x100 &pcie0_dart_0 1 1>,
<0x200 &pcie0_dart_2 1 1>;
};
&bluetooth0 {
brcm,board-type = "apple,santorini";
};
@@ -36,10 +44,10 @@
*/
&port02 {
bus-range = <3 3>;
bus-range = <2 2>;
status = "okay";
ethernet0: ethernet@0,0 {
reg = <0x30000 0x0 0x0 0x0 0x0>;
reg = <0x20000 0x0 0x0 0x0 0x0>;
/* To be filled by the loader */
local-mac-address = [00 10 18 00 00 00];
};