mediatek: fix broken PCIe caused by update to 5.15.158

The patch "710-pci-pcie-mediatek-add-support-for-coherent-DMA.patch"
makes use of "syscon_regmap_lookup_by_phandle" which requires that
"syscon" be in the compatible list.

Without this patch, PCIe probe will fail with the following error:

[    1.287467] mtk-pcie 1a143000.pcie: host bridge /pcie@1a143000 ranges:
[    1.294019] mtk-pcie 1a143000.pcie: Parsing ranges property...
[    1.299901] mtk-pcie 1a143000.pcie:      MEM 0x0020000000..0x0027ffffff -> 0x0020000000
[    1.307954] mtk-pcie 1a143000.pcie: missing hifsys node
[    1.313185] mtk-pcie: probe of 1a143000.pcie failed with error -22

Fixes: 01c58a0d2a ("kernel: bump 5.15 to 5.15.158")
Signed-off-by: Rany Hany <rany_hany@riseup.net>
(cherry picked from commit 8607372b410fbb24b08de97ff5941341d0870d6f)

diff --git a/target/linux/mediatek/patches-5.15/710-pci-pcie-mediatek-add-support-for-coherent-DMA.patch b/target/linux/mediatek/patches-5.15/710-pci-pcie-mediatek-add-support-for-coherent-DMA.patch
index a3247f1779ac9ff836c1f3b112a49f0a899bd285..917a458d308003ece9ed2798c67f2d09fad5f6de 100644 (file)
--- a/target/linux/mediatek/patches-5.15/710-pci-pcie-mediatek-add-support-for-coherent-DMA.patch
+++ b/target/linux/mediatek/patches-5.15/710-pci-pcie-mediatek-add-support-for-coherent-DMA.patch
@@ -30,6 +30,15 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  
                #interrupt-cells = <1>;
                interrupt-map-mask = <0 0 0 7>;
+@@ -937,7 +943,7 @@
+       };
+ 
+       hifsys: clock-controller@1af00000 {
+-              compatible = "mediatek,mt7622-hifsys";
++              compatible = "mediatek,mt7622-hifsys", "syscon";
+               reg = <0 0x1af00000 0 0x70>;
+               #clock-cells = <1>;
+       };
 --- a/drivers/pci/controller/pcie-mediatek.c
 +++ b/drivers/pci/controller/pcie-mediatek.c
 @@ -20,6 +20,7 @@