6.6-stable review patch. If anyone has any objections, please let me know.
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From: Janne Grunau j@jannau.net
[ Upstream commit 6e08cdd604edcec2c277af17c7d36caf827057ff ]
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: 7c77ab91b33d ("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@jann... Signed-off-by: Sven Peter sven@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- arch/arm64/boot/dts/apple/t8103-j457.dts | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/apple/t8103-j457.dts b/arch/arm64/boot/dts/apple/t8103-j457.dts index 152f95fd49a21..7089ccf3ce556 100644 --- a/arch/arm64/boot/dts/apple/t8103-j457.dts +++ b/arch/arm64/boot/dts/apple/t8103-j457.dts @@ -21,6 +21,14 @@ aliases { }; };
+/* + * 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 @@ &wifi0 { */
&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]; };