[RFT PATCH v3] ARM: omap1: enable real software node lookup of GPIOs on Nokia 770
Aaro Koskinen
aaro.koskinen at iki.fi
Fri Mar 27 09:59:22 PDT 2026
Hi,
On Fri, Mar 27, 2026 at 03:22:12PM +0100, Bartosz Golaszewski wrote:
> Hmm, I'm wondering if there's a race with consumers already requesting
> the GPIOs after the controller device is registered but before the
> software node is added. I'll send a version with software nodes being
> registered first, then passes as firmware nodes to the platform device
> API before the device is registered.
It crashes early, I was able to get an UART log from OSK (another
16xx board):
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 7.0.0-rc5-osk-00010-g9a0a87d27dc0 (aakoskin at lonestar) (arm-linux-gnueabi-gcc (GCC) 13.4.0, GNU ld (GNU Binutils) 2.45) #1 2026-03-26
[ 0.000000] CPU: ARM926EJ-S [41069263] revision 3 (ARMv5TEJ), cr=0005317f
[ 0.000000] CPU: VIVT data cache, VIVT instruction cache
[ 0.000000] Machine: TI-OSK
[ 0.000000] Ignoring tag cmdline (using the default kernel command line)
[ 0.000000] printk: legacy bootconsole [earlycon0] enabled
[ 0.000000] Memory policy: Data cache writeback
[ 0.000000] OMAP1611b revision 2 handled as 16xx id: 8d058f7948920905
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000010000000-0x0000000011ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000010000000-0x0000000011ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000010000000-0x0000000011ffffff]
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Kernel command line: mem=32M console=ttyS0,115200 earlyprintk initcall_debug loglevel=9
[ 0.000000] printk: log buffer data + meta data: 131072 + 409600 = 540672 bytes
[ 0.000000] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes, linear)
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 8192
[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] Total of 128 interrupts in 4 interrupt banks
[ 0.000000] Clocks: ARM_SYSST: 0x1000 DPLL_CTL: 0x2833 ARM_CKCTL: 0x2000
[ 0.000000] Clocking rate (xtal/DPLL1/MPU): 12.0/96.0/96.0 MHz
[ 0.000000] clocksource: 32k_counter: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 58327039986419 ns
[ 0.000030] sched_clock: 32 bits at 33kHz, resolution 30517ns, wraps every 65535999984741ns
[ 0.008880] OMAP clocksource: 32k_counter at 32768 Hz
[ 0.015106] Calibrating delay loop... 47.51 BogoMIPS (lpj=237568)
[ 0.130798] CPU: Testing write buffer coherency: ok
[ 0.137451] pid_max: default: 32768 minimum: 301
[ 0.144683] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.152648] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.166381] VFS: Finished mounting rootfs on nullfs
[ 0.197753] entering initcall level: early
[ 0.202270] calling allocate_overflow_stacks+0x0/0x50 @ 1
[ 0.209045] initcall allocate_overflow_stacks+0x0/0x50 returned 0 after 0 usecs
[ 0.217315] calling init_static_idmap+0x0/0x118 @ 1
[ 0.223144] Setting up static identity map for 0x10008400 - 0x1000843c
[ 0.230438] initcall init_static_idmap+0x0/0x118 returned 0 after 10000 usecs
[ 0.238555] calling spawn_ksoftirqd+0x0/0x70 @ 1
[ 0.246643] initcall spawn_ksoftirqd+0x0/0x70 returned 0 after 10000 usecs
[ 0.254516] calling init_signal_sysctls+0x0/0x4c @ 1
[ 0.260589] initcall init_signal_sysctls+0x0/0x4c returned 0 after 0 usecs
[ 0.268432] calling init_umh_sysctls+0x0/0x2c @ 1
[ 0.274139] initcall init_umh_sysctls+0x0/0x2c returned 0 after 10000 usecs
[ 0.281799] calling kthreads_init+0x0/0x34 @ 1
[ 0.287139] initcall kthreads_init+0x0/0x34 returned 0 after 0 usecs
[ 0.294372] calling migration_init+0x0/0x2c @ 1
[ 0.299560] initcall migration_init+0x0/0x2c returned 0 after 0 usecs
[ 0.306823] calling printk_set_kthreads_ready+0x0/0x34 @ 1
[ 0.312957] initcall printk_set_kthreads_ready+0x0/0x34 returned 0 after 0 usecs
[ 0.321105] calling irq_work_init_threads+0x0/0x8 @ 1
[ 0.326995] initcall irq_work_init_threads+0x0/0x8 returned 0 after 0 usecs
[ 0.334777] calling init_zero_pfn+0x0/0x2c @ 1
[ 0.339813] initcall init_zero_pfn+0x0/0x2c returned 0 after 0 usecs
[ 0.346954] calling init_fs_inode_sysctls+0x0/0x2c @ 1
[ 0.352874] initcall init_fs_inode_sysctls+0x0/0x2c returned 0 after 0 usecs
[ 0.360809] calling init_fs_locks_sysctls+0x0/0x2c @ 1
[ 0.366943] initcall init_fs_locks_sysctls+0x0/0x2c returned 0 after 0 usecs
[ 0.374938] calling init_fs_sysctls+0x0/0x2c @ 1
[ 0.380310] initcall init_fs_sysctls+0x0/0x2c returned 0 after 0 usecs
[ 0.389282] Memory: 24296K/32768K available (4054K kernel code, 525K rwdata, 888K rodata, 1688K init, 197K bss, 7868K reserved, 0K cma-reserved)
[ 0.408447] devtmpfs: initialized
[ 0.428741] entering initcall level: pure
[ 0.433135] calling ipc_ns_init+0x0/0x40 @ 1
[ 0.438537] initcall ipc_ns_init+0x0/0x40 returned 0 after 0 usecs
[ 0.445617] calling mmap_min_addr_init+0x0/0x44 @ 1
[ 0.451202] initcall mmap_min_addr_init+0x0/0x44 returned 0 after 0 usecs
[ 0.458801] calling pci_realloc_setup_params+0x0/0x48 @ 1
[ 0.465057] initcall pci_realloc_setup_params+0x0/0x48 returned 0 after 0 usecs
[ 0.472991] calling inet_frag_wq_init+0x0/0x4c @ 1
[ 0.480957] initcall inet_frag_wq_init+0x0/0x4c returned 0 after 0 usecs
[ 0.489318] entering initcall level: core
[ 0.493927] calling ptrace_break_init+0x0/0x2c @ 1
[ 0.499328] initcall ptrace_break_init+0x0/0x2c returned 0 after 0 usecs
[ 0.506805] calling omap1_pm_runtime_init+0x0/0x20 @ 1
[ 0.513122] initcall omap1_pm_runtime_init+0x0/0x20 returned 0 after 0 usecs
[ 0.521118] calling wq_sysfs_init+0x0/0x14 @ 1
[ 0.527404] initcall wq_sysfs_init+0x0/0x14 returned 0 after 0 usecs
[ 0.534698] calling ksysfs_init+0x0/0x9c @ 1
[ 0.540008] initcall ksysfs_init+0x0/0x9c returned 0 after 0 usecs
[ 0.547088] calling init_jiffies_clocksource+0x0/0x14 @ 1
[ 0.553131] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.564086] initcall init_jiffies_clocksource+0x0/0x14 returned 0 after 20000 usecs
[ 0.572387] calling posixtimer_init+0x0/0xd4 @ 1
[ 0.578155] posixtimers hash table entries: 512 (order: 0, 2048 bytes, linear)
[ 0.586212] initcall posixtimer_init+0x0/0xd4 returned 0 after 10000 usecs
[ 0.593994] calling futex_init+0x0/0xa0 @ 1
[ 0.598876] futex hash table entries: 256 (4096 bytes on 1 NUMA nodes, total 4 KiB, linear).
[ 0.608123] initcall futex_init+0x0/0xa0 returned 0 after 10000 usecs
[ 0.615386] calling cgroup_wq_init+0x0/0x78 @ 1
[ 0.620819] initcall cgroup_wq_init+0x0/0x78 returned 0 after 0 usecs
[ 0.628112] calling cgroup1_wq_init+0x0/0x38 @ 1
[ 0.633758] initcall cgroup1_wq_init+0x0/0x38 returned 0 after 0 usecs
[ 0.640899] calling fsnotify_init+0x0/0x30 @ 1
[ 0.646606] initcall fsnotify_init+0x0/0x30 returned 0 after 0 usecs
[ 0.653961] calling filelock_init+0x0/0xf8 @ 1
[ 0.659484] initcall filelock_init+0x0/0xf8 returned 0 after 0 usecs
[ 0.666839] calling init_script_binfmt+0x0/0x1c @ 1
[ 0.672393] initcall init_script_binfmt+0x0/0x1c returned 0 after 0 usecs
[ 0.680114] calling init_elf_binfmt+0x0/0x1c @ 1
[ 0.685699] initcall init_elf_binfmt+0x0/0x1c returned 0 after 0 usecs
[ 0.692901] calling gpiolib_dev_init+0x0/0x110 @ 1
[ 0.699584] initcall gpiolib_dev_init+0x0/0x110 returned 0 after 0 usecs
[ 0.707244] calling sock_init+0x0/0x108 @ 1
[ 0.714630] initcall sock_init+0x0/0x108 returned 0 after 10000 usecs
[ 0.721862] calling sock_struct_check+0x0/0x8 @ 1
[ 0.727539] initcall sock_struct_check+0x0/0x8 returned 0 after 0 usecs
[ 0.735107] calling net_inuse_init+0x0/0x24 @ 1
[ 0.740417] initcall net_inuse_init+0x0/0x24 returned 0 after 0 usecs
[ 0.747802] calling init_default_flow_dissectors+0x0/0x4c @ 1
[ 0.754577] initcall init_default_flow_dissectors+0x0/0x4c returned 0 after 0 usecs
[ 0.763244] calling netlink_proto_init+0x0/0xf8 @ 1
[ 0.774932] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 0.781799] initcall netlink_proto_init+0x0/0xf8 returned 0 after 10000 usecs
[ 0.789947] calling genl_init+0x0/0x38 @ 1
[ 0.795166] initcall genl_init+0x0/0x38 returned 0 after 0 usecs
[ 0.802490] entering initcall level: postcore
[ 0.807495] calling atomic_pool_init+0x0/0x134 @ 1
[ 0.816711] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.824401] initcall atomic_pool_init+0x0/0x134 returned 0 after 10000 usecs
[ 0.832092] calling omap16xx_gpio_init+0x0/0xe4 @ 1
[ 0.838867] 8<--- cut here ---
[ 0.842224] Unable to handle kernel NULL pointer dereference at virtual address 00000000 when read
[ 0.851989] [00000000] *pgd=00000000
[ 0.856262] Internal error: Oops: 5 [#1] ARM
[ 0.860931] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 7.0.0-rc5-osk-00010-g9a0a87d27dc0 #1 VOLUNTARY
[ 0.871368] Hardware name: TI-OSK
[ 0.874938] PC is at software_node_to_swnode+0x10/0x48
[ 0.880554] LR is at device_add_software_node+0x20/0x80
[ 0.886230] pc : [<c0273f10>] lr : [<c0274f20>] psr: a0000053
[ 0.892883] sp : c2809ed0 ip : c2809d94 fp : c052e6ec
[ 0.898437] r10: 00000000 r9 : 00000014 r8 : c052bae8
[ 0.903991] r7 : 00000005 r6 : c03fe9d4 r5 : c06b3ab0 r4 : c072d000
[ 0.910919] r3 : c0759b10 r2 : 00000000 r1 : c03fe9d4 r0 : c03fe9d4
[ 0.917846] Flags: NzCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.925506] Control: 0005317f Table: 10004000 DAC: 00000053
[ 0.931579] Register r0 information: non-slab/vmalloc memory
[ 0.937713] Register r1 information: non-slab/vmalloc memory
[ 0.943786] Register r2 information: NULL pointer
[ 0.948883] Register r3 information: non-slab/vmalloc memory
[ 0.954956] Register r4 information: non-slab/vmalloc memory
[ 0.961029] Register r5 information: non-slab/vmalloc memory
[ 0.967132] Register r6 information: non-slab/vmalloc memory
[ 0.973205] Register r7 information: non-paged memory
[ 0.978637] Register r8 information: non-slab/vmalloc memory
[ 0.984710] Register r9 information: non-paged memory
[ 0.990173] Register r10 information: NULL pointer
[ 0.995330] Register r11 information: non-slab/vmalloc memory
[ 1.001525] Register r12 information: 2-page vmalloc region starting at 0xc2808000 allocated at kernel_clone+0xa4/0x20c
[ 1.013092] Process swapper/0 (pid: 1, stack limit = 0x(ptrval))
[ 1.019500] Stack: (0xc2809ed0 to 0xc280a000)
[ 1.024230] 9ec0: c072d000 c0529474 c06b3aa0 c050a3cc
[ 1.032958] 9ee0: c072d000 c085c000 00000002 c052582c c050a324 c072d000 00000000 c0503160
[ 1.041687] 9f00: 00002710 00000000 c04da8f8 c0060900 c2809f64 ffffffff 00010000 946f70b5
[ 1.050384] 9f20: 00000062 c0816120 00000002 c052582c c0525848 c072d000 c04da8f8 c0060a18
[ 1.059112] 9f40: c2809f64 c2809f64 00000000 946f70b5 00000062 c0816120 00000002 c052582c
[ 1.067810] 9f60: c052584c c072d000 c04da8f8 c050352c 00000002 00000002 00000000 c0502400
[ 1.076507] 9f80: c2809f7c 00000000 c03f86f4 00000000 00000000 00000000 00000000 00000000
[ 1.085205] 9fa0: 00000000 c03f8704 00000000 c000850c 00000000 00000000 00000000 00000000
[ 1.093902] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.102600] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[ 1.111206] Call trace:
[ 1.111328] software_node_to_swnode from device_add_software_node+0x20/0x80
[ 1.121704] device_add_software_node from omap16xx_gpio_init+0xa8/0xe4
[ 1.128997] omap16xx_gpio_init from do_one_initcall+0x68/0x1f4
[ 1.135620] do_one_initcall from kernel_init_freeable+0x1ec/0x240
[ 1.142517] kernel_init_freeable from kernel_init+0x10/0x108
[ 1.148864] kernel_init from ret_from_fork+0x14/0x28
[ 1.154357] Exception stack(0xc2809fb0 to 0xc2809ff8)
[ 1.159820] 9fa0: 00000000 00000000 00000000 00000000
[ 1.168518] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.177185] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[ 1.184295] Code: e3500000 012fff1e e59f3034 e5932000 (e5923000)
[ 1.191040] ---[ end trace 0000000000000000 ]---
[ 1.196350] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[ 1.204559] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---
A.
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