我使用的内核是 GitHub - rubikpi-ai/linux-ubuntu: The Linux kernel used by Ubuntu.，在以下文件中仿照uart2的方法开启uart8节点，启动过程中内核报错。导致无法启动，会不会是硬件哪里配置有问题？
对设备树的改动如下，并按照步骤安装新内核，
之后启动的打印节选如下
[ 5.286186] /soc@0/geniqup@ac0000/i2c@a84000/hdmi-bridge@39: Fixed dependency cycle(s) with /hdmi-connector
[ 5.443232] /soc@0/geniqup@ac0000/i2c@a84000/hdmi-bridge@39: Fixed dependency cycle(s) with /soc@0/display-subsystem@ae00000/dsi@ae94000
[ 5.461327] qcom-ice 1d88000.crypto: Found QC Inline Crypto Engine (ICE) v3.2.0
[ 5.468866] qcom-ice 1d88000.crypto: QC ICE HWKM (Hardware Key Manager) version = 1
[ 5.478611] arm-smmu 3da0000.iommu: probing hardware configuration...
[ 5.485253] arm-smmu 3da0000.iommu: SMMUv2 with:
[ 5.490028] arm-smmu 3da0000.iommu: stage 1 translation
[ 5.495490] arm-smmu 3da0000.iommu: coherent table walk
[ 5.500952] arm-smmu 3da0000.iommu: stream matching with 9 register groups
[ 5.508123] arm-smmu 3da0000.iommu: 7 context banks (0 stage-2 only)
[ 5.514761] arm-smmu 3da0000.iommu: Supported page sizes: 0x61311000
[ 5.521389] arm-smmu 3da0000.iommu: Stage-1: 48-bit VA -> 36-bit IPA
[ 5.528276] arm-smmu 3da0000.iommu: preserved 0 boot mappings
[ 5.537934] qcom,qfprom 784000.efuse: supply vcc not found, using dummy regulator
[ 5.561886] qcom-pcie 1c08000.pcie: supply vddpe-3v3 not found, using dummy regulator
[ 5.562491] 988000.serial: ttyHS2 at MMIO 0x988000 (irq = 128, base_baud = 0) is a MSM
[ 5.570140] qcom-pcie 1c08000.pcie: host bridge /soc@0/pcie@1c08000 ranges:
[ 5.580138] 994000.serial: ttyMSM0 at MMIO 0x994000 (irq = 129, base_baud = 0) is a MSM
[ 5.585275] qcom-pcie 1c08000.pcie: IO 0x0040200000..0x00402fffff -> 0x0000000000
[ 5.601728] qcom-pcie 1c08000.pcie: MEM 0x0040300000..0x005fffffff -> 0x0040300000
[ 5.610441] printk: legacy console [ttyMSM0] enabled
[ 5.610441] printk: legacy console [ttyMSM0] enabled
[ 5.620676] printk: legacy bootconsole [qcom_geni0] disabled
[ 5.620676] printk: legacy bootconsole [qcom_geni0] disabled
[ 5.634505] 99c000.serial: ttyHS7 at MMIO 0x99c000 (irq = 130, base_baud = 0) is a MSM
[ 5.643788] serial serial0: tty port ttyHS7 registered
[ 5.651839] a80000.serial: ttyHS8 at MMIO 0xa80000 (irq = 132, base_baud = 0) is a MSM
[ 5.660143] Internal error: synchronous external abort: 0000000096000010 [#1] SMP
[ 5.667825] Modules linked in: aes_neon_bs aes_neon_blk aes_ce_blk aes_ce_cipher
[ 5.675432] CPU: 7 PID: 83 Comm: kworker/u16:3 Not tainted 6.8.0-1055-qcom #55
[ 5.682845] Hardware name: Thundercomm, Inc. RUBIK Pi 3 (DT)
[ 5.688657] Workqueue: events_unbound deferred_probe_work_func
[ 5.694665] pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[ 5.701811] pc : qcom_geni_serial_set_mctrl+0x64/0x1d0
[ 5.707096] lr : uart_configure_port.isra.0+0x1fc/0x278
[ 5.712463] sp : ffff8000807a39b0
[ 5.715871] x29: ffff8000807a39b0 x28: 0000000000000000 x27: ffffa29a22d82208
[ 5.723203] x26: ffffa29a22abac60 x25: ffffa29a214c5c00 x24: ffffa29a22ababa0
[ 5.730529] x23: ffff627207198ec0 x22: 0000000000000000 x21: 0000000000000000
[ 5.737856] x20: ffff627207198dc0 x19: ffffa29a22d81ff8 x18: ffff8000807430a0
[ 5.745182] x17: 0000000000000000 x16: 0000000000000000 x15: 3331203d20717269
[ 5.752507] x14: 0000000000000000 x13: 0000000000000000 x12: 000500a400000000
[ 5.759833] x11: 0000000000000000 x10: 0000000000001bb0 x9 : ffffa29a20452d5c
[ 5.767161] x8 : ffff8000807a34d8 x7 : 0000000000000000 x6 : 0000000000000000
[ 5.767823] qcom-pcie 1c08000.pcie: iATU: unroll T, 8 ob, 8 ib, align 4K, limit 1024G
[ 5.774493] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000080000002
[ 5.774500] x2 : 0000000000000000 x1 : ffff8000839b82ac x0 : ffffa29a22d81ff8
[ 5.774506] Call trace:
[ 5.774509] qcom_geni_serial_set_mctrl+0x64/0x1d0
[ 5.804617] uart_configure_port.isra.0+0x1fc/0x278
[ 5.809625] serial_core_add_one_port+0x16c/0x278
[ 5.814456] serial_core_register_port+0xc8/0x1b0
[ 5.819288] serial_ctrl_register_port+0x1c/0x40
[ 5.824037] uart_add_one_port+0x1c/0x40
[ 5.828072] qcom_geni_serial_probe+0x304/0x5d8
[ 5.832726] platform_probe+0x74/0x118
[ 5.836583] really_probe+0x1c0/0x420
[ 5.840354] __driver_probe_device+0x94/0x1d8
[ 5.844839] driver_probe_device+0x48/0x188
[ 5.849146] __device_attach_driver+0x114/0x220
[ 5.853811] bus_for_each_drv+0x94/0x118
[ 5.857852] __device_attach+0xac/0x208
[ 5.861800] device_initial_probe+0x20/0x48
[ 5.866101] bus_probe_device+0xcc/0xd8
[ 5.870051] deferred_probe_work_func+0xac/0x120
[ 5.874795] process_one_work+0x17c/0x448
[ 5.878923] worker_thread+0x360/0x480
[ 5.882779] kthread+0xf8/0x110
[ 5.886007] ret_from_fork+0x10/0x20
[ 5.889691] Code: 1a9f0063 f9400801 910ab021 d50332bf (b9000023)
[ 5.895948] ---[ end trace 0000000000000000 ]---
[ 5.900687] note: kworker/u16:3[83] exited with irqs disabled
[ 5.906617] note: kworker/u16:3[83] exited with preempt_count 1
[ 6.789662] qcom-pcie 1c08000.pcie: Phy link never came up
[ 6.795813] qcom-pcie 1c08000.pcie: PCI host bridge to bus 0001:00
[ 6.802272] pci_bus 0001:00: root bus resource [bus 00-ff]
[ 6.807917] pci_bus 0001:00: root bus resource [io 0x0000-0xfffff]
[ 6.814367] pci_bus 0001:00: root bus resource [mem 0x40300000-0x5fffffff]
[ 6.821519] pci 0001:00:00.0: [17cb:010b] type 01 class 0x060400 PCIe Root Port
[ 6.829054] pci 0001:00:00.0: BAR 0 [mem 0x00000000-0x00000fff]
[ 6.835145] pci 0001:00:00.0: PCI bridge to [bus 01-ff]
[ 6.840524] pci 0001:00:00.0: bridge window [io 0x0000-0x0fff]
[ 6.846793] pci 0001:00:00.0: bridge window [mem 0x00000000-0x000fffff]
[ 6.853776] pci 0001:00:00.0: bridge window [mem 0x00000000-0x000fffff 64bit pref]
[ 6.861779] pci 0001:00:00.0: PME# supported from D0 D3hot D3cold
[ 6.876964] pci 0001:00:00.0: BAR 0 [mem 0x40300000-0x40300fff]: assigned
[ 6.883968] pci 0001:00:00.0: PCI bridge to [bus 01-ff]
[ 6.889580] pcieport 0001:00:00.0: Adding to iommu group 3
[ 6.897600] pcieport 0001:00:00.0: Cannot get wake GPIO
[ 6.903166] pcieport 0001:00:00.0: PME: Signaling with IRQ 141
[ 6.910094] pcieport 0001:00:00.0: AER: enabled with IRQ 141
初步的debug过程如下
ubuntu@2990c793929f:~/linux-ubuntu/debian/build/build-qcom$ gdb-multiarch vmlinux
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Reading symbols from vmlinux...
(gdb) list *(qcom_geni_serial_set_mctrl + 0x64)
0xffff800080cde214 is in qcom_geni_serial_set_mctrl (/home/ubuntu/linux-ubuntu/arch/arm64/include/asm/io.h:39).
34 }
35
36 #define __raw_writel __raw_writel
37 static __always_inline void __raw_writel(u32 val, volatile void __iomem *addr)
38 {
39 asm volatile("str %w0, [%1]" : : "rZ" (val), "r" (addr));
40 }
41
42 #define __raw_writeq __raw_writeq
43 static __always_inline void __raw_writeq(u64 val, volatile void __iomem *addr)
(gdb)
是不是哪里还需要再配置？谢谢！