TDA4VM: Questions about the use of PPS

Part Number: TDA4VM

Hi,

We have custom tda4 board and we plan to connect PPS signal from GPS device to GPIO0_125.

We enabled PPS support in kernel and added following changes in k3-j721e-common-proc-board.dts file:

Because the pins of uart1 are used in PPS of our board,so we have to disabled the uart1 in dts file:

After the changes are completed and compiled,we start the kernel.Log is here:

Starting kernel ...

[    0.000000] Booting Linux on physical CPU 0x0000000000 [0x411fd080]
[    0.000000] Linux version 5.4.74-g9574bba32a (hluo@CSP-test2) (gcc version 9.2.1 20191025 (GNU Toolchain for the A-profile Architecture 9.1
[    0.000000] Machine model: Texas Instruments K3 J721E SoC
[    0.000000] earlycon: ns16550a0 at MMIO32 0x0000000002800000 (options '')
[    0.000000] printk: bootconsole [ns16550a0] enabled
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a0000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node r5f-dma-memory@a0000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a0100000, size 15 MiB
[    0.000000] OF: reserved mem: initialized node r5f-memory@a0100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a1000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-r5f-dma-memory@a1000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a1100000, size 31 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-r5f-memory@a1100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a3000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node r5f-dma-memory@a3000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a3100000, size 31 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-r5f-memory@a3100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a5000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-r5f-dma-memory@a5000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a5100000, size 7 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-r5f-memory@a5100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a5800000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-r5f-dma-memory@a5800000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a5900000, size 7 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-r5f-memory@a5900000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a6000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node c66-dma-memory@a6000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a6100000, size 15 MiB
[    0.000000] OF: reserved mem: initialized node c66-memory@a6100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a7000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node c66-dma-memory@a7000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a7100000, size 15 MiB
[    0.000000] OF: reserved mem: initialized node c66-memory@a7100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a8000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node c71-dma-memory@a8000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000a8100000, size 15 MiB
[    0.000000] OF: reserved mem: initialized node c71-memory@a8100000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000ac000000, size 32 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-dma-memory@ac000000, compatible id shared-dma-pool
[    0.000000] OF: reserved mem: initialized node vision_apps_shared-memories, compatible id dma-heap-carveout
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000ce000000, size 720 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-core-heap-memory@ce000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000fb000000, size 1 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-r5f-dma-memory@fb000000, compatible id shared-dma-pool
[    0.000000] Reserved memory: created DMA memory pool at 0x00000000fb100000, size 15 MiB
[    0.000000] OF: reserved mem: initialized node vision_apps-r5f-memory@fb100000, compatible id shared-dma-pool
[    0.000000] cma: Failed to reserve 512 MiB
[    0.000000] psci: probing for conduit method from DT.
[    0.000000] psci: PSCIv1.1 detected in firmware.
[    0.000000] psci: Using standard PSCI v0.2 function IDs
[    0.000000] psci: Trusted OS migration not required
[    0.000000] psci: SMC Calling Convention v1.0
[    0.000000] percpu: Embedded 2 pages/cpu s48408 r8192 d74472 u131072
[    0.000000] Detected PIPT I-cache on CPU0
[    0.000000] CPU features: detected: GIC system register CPU interface
[    0.000000] CPU features: detected: EL2 vector hardening
[    0.000000] Built 1 zonelists, mobility grouping off.  Total pages: 35779
[    0.000000] Kernel command line: console=ttyS2,115200n8 earlycon=ns16550a,mmio32,0x02800000 mtdparts=47040000.spi.0:512k(ospi.tiboot3),2m(t
[    0.000000] Dentry cache hash table entries: 524288 (order: 6, 4194304 bytes, linear)
[    0.000000] Inode-cache hash table entries: 262144 (order: 5, 2097152 bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] software IO TLB: mapped [mem 0x9a800000-0x9e800000] (64MB)
[    0.000000] Memory: 2584000K/2293760K available (9598K kernel code, 788K rwdata, 3840K rodata, 1664K init, 683K bss, 18446744073709261376K)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000] rcu: Preemptible hierarchical RCU implementation.
[    0.000000] rcu:     RCU restricting CPUs from NR_CPUS=256 to nr_cpu_ids=2.
[    0.000000]  Tasks RCU enabled.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
[    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=2
[    0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
[    0.000000] GICv3: GIC: Using split EOI/Deactivate mode
[    0.000000] GICv3: 960 SPIs implemented
[    0.000000] GICv3: 0 Extended SPIs implemented
[    0.000000] GICv3: Distributor has no Range Selector support
[    0.000000] GICv3: 16 PPIs implemented
[    0.000000] GICv3: no VLPI support, no direct LPI support
[    0.000000] GICv3: CPU0: found redistributor 0 region 0:0x0000000001900000
[    0.000000] ITS [mem 0x01820000-0x0182ffff]
[    0.000000] GIC: enabling workaround for ITS: Socionext Synquacer pre-ITS
[    0.000000] ITS@0x0000000001820000: allocated 1048576 Devices @8c0800000 (flat, esz 8, psz 64K, shr 0)
[    0.000000] ITS: using cache flushing for cmd queue
[    0.000000] GICv3: using LPI property table @0x00000008c00c0000
[    0.000000] GIC: using cache flushing for LPI property table
[    0.000000] GICv3: CPU0: using allocated LPI pending table @0x00000008c00d0000
[    0.000000] random: get_random_bytes called from start_kernel+0x2b8/0x43c with crng_init=0
[    0.000000] arch_timer: cp15 timer(s) running at 200.00MHz (phys).
[    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x2e2049d3e8, max_idle_ns: 440795210634 ns
[    0.000001] sched_clock: 56 bits at 200MHz, resolution 5ns, wraps every 4398046511102ns
[    0.008359] Console: colour dummy device 80x25
[    0.012924] Calibrating delay loop (skipped), value calculated using timer frequency.. 400.00 BogoMIPS (lpj=800000)
[    0.023592] pid_max: default: 32768 minimum: 301
[    0.028345] LSM: Security Framework initializing
[    0.033100] Mount-cache hash table entries: 8192 (order: 0, 65536 bytes, linear)
[    0.040673] Mountpoint-cache hash table entries: 8192 (order: 0, 65536 bytes, linear)
[    0.049935] ASID allocator initialised with 32768 entries
[    0.055529] rcu: Hierarchical SRCU implementation.
[    0.060595] Platform MSI: gic-its@1820000 domain created
[    0.066268] PCI/MSI: /bus@100000/interrupt-controller@1800000/gic-its@1820000 domain created
[    0.075109] smp: Bringing up secondary CPUs ...
[    0.081029] Detected PIPT I-cache on CPU1
[    0.081052] GICv3: CPU1: found redistributor 1 region 0:0x0000000001920000
[    0.081063] GICv3: CPU1: using allocated LPI pending table @0x00000008c00e0000
[    0.081093] CPU1: Booted secondary processor 0x0000000001 [0x411fd080]
[    0.081152] smp: Brought up 1 node, 2 CPUs
[    0.110498] SMP: Total of 2 processors activated.
[    0.115302] CPU features: detected: 32-bit EL0 Support
[    0.120554] CPU features: detected: CRC32 instructions
[    0.132593] CPU: All CPU(s) started at EL2
[    0.136787] alternatives: patching kernel code
[    0.141969] devtmpfs: initialized
[    0.150542] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.160513] futex hash table entries: 512 (order: -1, 32768 bytes, linear)
[    0.167946] pinctrl core: initialized pinctrl subsystem
[    0.173784] NET: Registered protocol family 16
[    0.178539] DMA: preallocated 256 KiB pool for atomic allocations
[    0.185048] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
[    0.200321] HugeTLB registered 16.0 GiB page size, pre-allocated 0 pages
[    0.207178] HugeTLB registered 512 MiB page size, pre-allocated 0 pages
[    0.213939] HugeTLB registered 2.00 MiB page size, pre-allocated 0 pages
[    0.222098] cryptd: max_cpu_qlen set to 1000
[    0.228610] vsys_3v3: supplied by evm_12v0
[    0.232890] vsys_5v0: supplied by evm_12v0
[    0.237436] iommu: Default domain type: Translated
[    0.242653] SCSI subsystem initialized
[    0.246761] mc: Linux media interface: v0.10
[    0.251132] videodev: Linux video capture interface: v2.00
[    0.256743] pps_core: LinuxPPS API ver. 1 registered
[    0.261812] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[    0.271148] PTP clock support registered
[    0.275159] EDAC MC: Ver: 3.0.0
[    0.278897] FPGA manager framework
[    0.282410] Advanced Linux Sound Architecture Driver Initialized.
[    0.289058] clocksource: Switched to clocksource arch_sys_counter
[    0.295383] VFS: Disk quotas dquot_6.6.0
[    0.299432] VFS: Dquot-cache hash table entries: 8192 (order 0, 65536 bytes)
[    0.309003] Carveout Heap: Exported 512 MiB at 0x00000000ae000000
[    0.315235] thermal_sys: Registered thermal governor 'step_wise'
[    0.315237] thermal_sys: Registered thermal governor 'power_allocator'
[    0.321686] NET: Registered protocol family 2
[    0.333088] tcp_listen_portaddr_hash hash table entries: 4096 (order: 0, 65536 bytes, linear)
[    0.341846] TCP established hash table entries: 32768 (order: 2, 262144 bytes, linear)
[    0.350041] TCP bind hash table entries: 32768 (order: 3, 524288 bytes, linear)
[    0.357857] TCP: Hash tables configured (established 32768 bind 32768)
[    0.364602] UDP hash table entries: 2048 (order: 0, 65536 bytes, linear)
[    0.371495] UDP-Lite hash table entries: 2048 (order: 0, 65536 bytes, linear)
[    0.378906] NET: Registered protocol family 1
[    0.383662] RPC: Registered named UNIX socket transport module.
[    0.389714] RPC: Registered udp transport module.
[    0.394517] RPC: Registered tcp transport module.
[    0.399318] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.405903] PCI: CLS 0 bytes, default 64
[    0.410272] hw perfevents: enabled with armv8_pmuv3 PMU driver, 7 counters available
[    0.420436] Initialise system trusted keyrings
[    0.425065] workingset: timestamp_bits=46 max_order=16 bucket_order=0
[    0.433792] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.440012] NFS: Registering the id_resolver key type
[    0.445187] Key type id_resolver registered
[    0.449457] Key type id_legacy registered
[    0.453553] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
[    0.460514] 9p: Installing v9fs 9p2000 file system support
[    0.473403] Key type asymmetric registered
[    0.477589] Asymmetric key parser 'x509' registered
[    0.482592] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 244)
[    0.490151] io scheduler mq-deadline registered
[    0.494777] io scheduler kyber registered
[    0.499933] pinctrl-single 4301c000.pinmux: ###########################[debug]pinctrl probed##########################
[    0.510941] pinctrl-single 4301c000.pinmux: 94 pins, size 376
[    0.516907] pinctrl-single 11c000.pinmux: ###########################[debug]pinctrl probed##########################
[    0.527778] pinctrl-single 11c000.pinmux: 173 pins, size 692
[    0.535979] k3-ringacc 2b800000.ringacc: Failed to get MSI domain
[    0.542273] k3-ringacc 3c000000.ringacc: Failed to get MSI domain
[    0.548619] ti-pat 31010000.pat: Found PAT Rev 1.0 with 16384 pages
[    0.555032] debugfs: Directory '31010000.pat' with parent 'regmap' already present!
[    0.563016] ti-pat 31011000.pat: Found PAT Rev 1.0 with 16384 pages
[    0.569432] debugfs: Directory '31011000.pat' with parent 'regmap' already present!
[    0.577357] ti-pat 31012000.pat: Found PAT Rev 1.0 with 16384 pages
[    0.583773] debugfs: Directory '31012000.pat' with parent 'regmap' already present!
[    0.591702] ti-pat 31013000.pat: Found PAT Rev 1.0 with 2048 pages
[    0.598025] debugfs: Directory '31013000.pat' with parent 'regmap' already present!
[    0.605942] ti-pat 31014000.pat: Found PAT Rev 1.0 with 2048 pages
[    0.612265] debugfs: Directory '31014000.pat' with parent 'regmap' already present!
[    0.621644] Serial: 8250/16550 driver, 10 ports, IRQ sharing enabled
[    0.633670] brd: module loaded
[    0.640054] loop: module loaded
[    0.643657] sysfs: cannot create duplicate filename '/devices/platform/dma_buf_phys'
[    0.651582] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.74-g9574bba32a #83
[    0.658780] Hardware name: Texas Instruments K3 J721E SoC (DT)
[    0.664735] Call trace:
[    0.667232]  dump_backtrace+0x0/0x140
[    0.670967]  show_stack+0x14/0x20
[    0.674349]  dump_stack+0xb4/0x114
[    0.677826]  sysfs_warn_dup+0x5c/0x78
[    0.681560]  sysfs_create_dir_ns+0xd8/0xf0
[    0.685741]  kobject_add_internal+0x94/0x280
[    0.690097]  kobject_add+0x90/0xf8
[    0.693569]  device_add+0xdc/0x600
[    0.697038]  platform_device_add+0xfc/0x228
[    0.701304]  platform_device_register_full+0xc8/0x140
[    0.706463]  dma_buf_phys_init+0x68/0x94
[    0.710465]  do_one_initcall+0x50/0x1a8
[    0.714383]  kernel_init_freeable+0x194/0x23c
[    0.718831]  kernel_init+0x10/0xfc
[    0.722299]  ret_from_fork+0x10/0x1c
[    0.725964] kobject_add_internal failed for dma_buf_phys with -EEXIST, don't try to register things with the same name in the same directo.
[    0.740099] libphy: Fixed MDIO Bus: probed
[    0.744512] tun: Universal TUN/TAP device driver, 1.6
[    0.749930] igbvf: Intel(R) Gigabit Virtual Function Network Driver - version 2.4.0-k
[    0.757932] igbvf: Copyright (c) 2009 - 2012 Intel Corporation.
[    0.763997] sky2: driver version 1.30
[    0.768227] VFIO - User Level meta-driver version: 0.3
[    0.773854] i2c /dev entries driver
[    0.777537] pps pps0: new PPS source ktimer
[    0.781811] pps pps0: ktimer PPS source registered
[    0.888508] pps-gpio pps-gpio: failed to request PPS GPIO
[    0.894034] pps-gpio: probe of pps-gpio failed with error -22
[    0.900343] sdhci: Secure Digital Host Controller Interface driver
[    0.906659] sdhci: Copyright(c) Pierre Ossman
[    0.911295] sdhci-pltfm: SDHCI platform and OF driver helper
[    0.917548] ledtrig-cpu: registered to indicate activity on CPUs
[    0.924337] optee: probing for conduit method from DT.
[    0.929618] optee: revision 3.8 (199fca17)
[    0.929949] optee: initialized driver
[    0.938763] NET: Registered protocol family 17
[    0.943390] 9pnet: Installing 9P2000 support
[    0.947781] Key type dns_resolver registered
[    0.952303] registered taskstats version 1
[    0.956489] Loading compiled-in X.509 certificates
[    0.965304] k3-ringacc 2b800000.ringacc: Failed to get MSI domain
[    0.971626] k3-ringacc 3c000000.ringacc: Failed to get MSI domain
[    0.979663] ti-sci 44083000.dmsc: ABI: 3.1 (firmware rev 0x0014 '20.8.5--v2020.08b (Terrific Lla')
[    1.098539] random: fast init done
[    1.249774] davinci-mcasp 2ba0000.mcasp: IRQ common not found
[    1.256513] davinci_gpio 42110000.gpio: ###########################[debug]GPIO controller probed##########################
[    1.268435] davinci_gpio 600000.gpio: ###########################[debug]GPIO controller probed##########################
[    1.280132] davinci_gpio 601000.gpio: ###########################[debug]GPIO controller probed##########################
[    1.292270] omap_i2c 40b00000.i2c: bus 0 rev0.12 at 100 kHz
[    1.298650] omap_i2c 40b10000.i2c: bus 1 rev0.12 at 100 kHz
[    1.305097] omap_i2c 42120000.i2c: bus 2 rev0.12 at 100 kHz
[    1.311540] pca953x 3-0020: 3-0020 supply vcc not found, using dummy regulator
[    1.318960] pca953x 3-0020: using no AI
[    1.345096] pca953x 3-0020: failed writing register
[    1.350138] pca953x: probe of 3-0020 failed with error -121
[    1.355936] pca953x 3-0022: 3-0022 supply vcc not found, using dummy regulator
[    1.363336] pca953x 3-0022: using AI
[    1.367034] pca953x 3-0022: failed writing register
[    1.372041] pca953x: probe of 3-0022 failed with error -121
[    1.377768] omap_i2c 2000000.i2c: bus 3 rev0.12 at 400 kHz
[    1.384013] omap_i2c 2020000.i2c: bus 4 rev0.12 at 100 kHz
[    1.390278] pca953x 5-0020: 5-0020 supply vcc not found, using dummy regulator
[    1.397682] pca953x 5-0020: using no AI
[    1.425100] pca953x 5-0020: failed writing register
[    1.430124] pca953x: probe of 5-0020 failed with error -121
[    1.435917] omap_i2c 2030000.i2c: bus 5 rev0.12 at 400 kHz
[    1.442141] omap_i2c 2040000.i2c: bus 6 rev0.12 at 100 kHz
[    1.448353] omap_i2c 2050000.i2c: bus 7 rev0.12 at 100 kHz
[    1.454955] ti-sci-intr bus@100000:bus@28380000:interrupt-controller2: Interrupt Router 137 domain created
[    1.465324] ti-sci-intr bus@100000:interrupt-controller0: Interrupt Router 131 domain created
[    1.474528] ti-sci-intr bus@100000:navss@30000000:interrupt-controller1: Interrupt Router 213 domain created
[    1.485468] ti-sci-inta 33d00000.interrupt-controller: Interrupt Aggregator domain 209 created
[    2.520180] j721e-pcie 2910000.pcie: host bridge /bus@100000/pcie@2910000 ranges:
[    2.527855] j721e-pcie 2910000.pcie:    IO 0x18001000..0x18010fff -> 0x18001000
[    2.535333] j721e-pcie 2910000.pcie:   MEM 0x18011000..0x1fffffff -> 0x18011000
[    2.542882] j721e-pcie 2910000.pcie: PCI host bridge to bus 0000:00
[    2.549289] pci_bus 0000:00: root bus resource [bus 00-0f]
[    2.554895] pci_bus 0000:00: root bus resource [io  0x0000-0xffff] (bus address [0x18001000-0x18010fff])
[    2.564584] pci_bus 0000:00: root bus resource [mem 0x18011000-0x1fffffff]
[    2.571624] pci 0000:00:00.0: [104c:b00d] type 01 class 0x060400
[    2.577774] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0x4 may corrupt adjacent RW1C bits
[    2.587643] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0x4 may corrupt adjacent RW1C bits
[    2.597529] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0xe8 may corrupt adjacent RW1C bits
[    2.607487] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0x3e may corrupt adjacent RW1C bits
[    2.617458] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0x92 may corrupt adjacent RW1C bits
[    2.627420] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0xb2 may corrupt adjacent RW1C bits
[    2.637403] pci 0000:00:00.0: supports D1
[    2.641496] pci 0000:00:00.0: PME# supported from D0 D1 D3hot
[    2.647366] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0x84 may corrupt adjacent RW1C bits
[    2.659125] pci 0000:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
[    2.667314] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0x3e may corrupt adjacent RW1C bits
[    2.677272] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0x3e may corrupt adjacent RW1C bits
[    2.687230] pci_bus 0000:00: 2-byte config write to 0000:00:00.0 offset 0x3e may corrupt adjacent RW1C bits
[    2.698690] pci_bus 0000:01: busn_res: [bus 01-0f] end is updated to 01
[    2.705459] pci 0000:00:00.0: PCI bridge to [bus 01]
[    2.710729] pcieport 0000:00:00.0: PME: Signaling with IRQ 37
[    2.716766] pcieport 0000:00:00.0: AER: enabled with IRQ 37
[    2.725821] k3-ringacc 2b800000.ringacc: Ring Accelerator probed rings:286, gp-rings[96,20] sci-dev-id:235
[    2.735705] k3-ringacc 2b800000.ringacc: dma-ring-reset-quirk: disabled
[    2.742464] k3-ringacc 2b800000.ringacc: RA Proxy rev. 66346100, num_proxies:64
[    2.751872] k3-ringacc 3c000000.ringacc: Ring Accelerator probed rings:1024, gp-rings[440,150] sci-dev-id:211
[    2.762026] k3-ringacc 3c000000.ringacc: dma-ring-reset-quirk: disabled
[    2.768784] k3-ringacc 3c000000.ringacc: RA Proxy rev. 66346100, num_proxies:64
[    2.777106] 40a00000.serial: ttyS1 at MMIO 0x40a00000 (irq = 7, base_baud = 6000000) is a 8250
[    2.786784] 2800000.serial: ttyS2 at MMIO 0x2800000 (irq = 22, base_baud = 3000000) is a 8250
[    2.795527] printk: console [ttyS2] enabled
[    2.795527] printk: console [ttyS2] enabled
[    2.803965] printk: bootconsole [ns16550a0] disabled
[    2.803965] printk: bootconsole [ns16550a0] disabled
[    2.814725] 2840000.serial: ttyS6 at MMIO 0x2840000 (irq = 23, base_baud = 3000000) is a 8250
[    2.823831] arm-smmu-v3 36600000.smmu: ias 48-bit, oas 48-bit (features 0x00001faf)
[    2.833220] arm-smmu-v3 36600000.smmu: allocated 524288 entries for cmdq
[    2.843147] arm-smmu-v3 36600000.smmu: allocated 524288 entries for evtq
[    2.851005] arm-smmu-v3 36600000.smmu: msi_domain absent - falling back to wired irqs
[    2.909076] davinci_mdio 46000f00.mdio: davinci mdio revision 9.7, bus freq 1000000
[    2.916723] libphy: 46000f00.mdio: probed
[    2.920933] mdio_bus 46000f00.mdio: MDIO device at address 0 is missing.
[    2.927634] am65-cpsw-nuss 46000000.ethernet: initializing am65 cpsw nuss version 0x6BA00101, cpsw version 0x6BA80100 Ports: 2 quirks:00000
[    2.940455] am65-cpsw-nuss 46000000.ethernet: Failed to request tx dma channel -517
[    2.951921] am65-cpts 310d0000.cpts: CPTS ver 0x4e8a010a, freq:200000000, add_val:4 pps:0
[    2.961197] mmc0: CQHCI version 5.10
[    3.005621] mmc0: SDHCI controller on 4f80000.sdhci [4f80000.sdhci] using ADMA 64-bit
[    3.016549] davinci-mcasp 2ba0000.mcasp: IRQ common not found
[    3.023068] davinci_gpio 42110000.gpio: ###########################[debug]GPIO controller probed##########################
[    3.040941] davinci_gpio 600000.gpio: ###########################[debug]GPIO controller probed##########################
[    3.061191] davinci_gpio 601000.gpio: ###########################[debug]GPIO controller probed##########################
[    3.077841] omap-mailbox 31f80000.mailbox: omap mailbox rev 0x66fc7100
[    3.086000] omap-mailbox 31f81000.mailbox: omap mailbox rev 0x66fc7100
[    3.094121] omap-mailbox 31f82000.mailbox: omap mailbox rev 0x66fc7100
[    3.102267] omap-mailbox 31f83000.mailbox: omap mailbox rev 0x66fc7100
[    3.110448] omap-mailbox 31f84000.mailbox: omap mailbox rev 0x66fc7100
[    3.171720] mmc0: Command Queue Engine enabled
[    3.176166] mmc0: new DDR MMC card at address 0001
[    3.181313] mmcblk0: mmc0:0001 032G34 29.1 GiB
[    3.185979] mmcblk0boot0: mmc0:0001 032G34 partition 1 8.00 MiB
[    3.192067] mmcblk0boot1: mmc0:0001 032G34 partition 2 8.00 MiB
[    3.198070] mmcblk0rpmb: mmc0:0001 032G34 partition 3 4.00 MiB, chardev (240:0)
[    3.207667]  mmcblk0: p1 p2
[    4.121113] j721e-pcie 2900000.pcie: host bridge /bus@100000/pcie@2900000 ranges:
[    4.128619] j721e-pcie 2900000.pcie:    IO 0x10001000..0x10010fff -> 0x10001000
[    4.135918] j721e-pcie 2900000.pcie:   MEM 0x10011000..0x17ffffff -> 0x10011000
[    4.143300] j721e-pcie 2900000.pcie: PCI host bridge to bus 0001:00
[    4.149556] pci_bus 0001:00: root bus resource [bus 00-0f]
[    4.155029] pci_bus 0001:00: root bus resource [io  0x10000-0x1ffff] (bus address [0x10001000-0x10010fff])
[    4.164660] pci_bus 0001:00: root bus resource [mem 0x10011000-0x17ffffff]
[    4.171537] pci 0001:00:00.0: [104c:b00d] type 01 class 0x060400
[    4.177606] pci 0001:00:00.0: supports D1
[    4.181605] pci 0001:00:00.0: PME# supported from D0 D1 D3hot
[    4.189254] pci 0001:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
[    4.198906] pci_bus 0001:01: busn_res: [bus 01-0f] end is updated to 01
[    4.205518] pci 0001:00:00.0: PCI bridge to [bus 01]
[    4.210693] pcieport 0001:00:00.0: PME: Signaling with IRQ 481
[    4.216687] pcieport 0001:00:00.0: AER: enabled with IRQ 481
[    4.324988] j721e-pcie 2920000.pcie: Link up
[    4.329255] j721e-pcie 2920000.pcie: host bridge /bus@100000/pcie@2920000 ranges:
[    4.336735] j721e-pcie 2920000.pcie:    IO 0x4400001000..0x4400010fff -> 0x00001000
[    4.344379] j721e-pcie 2920000.pcie:   MEM 0x4400011000..0x4407ffffff -> 0x00011000
[    4.352083] j721e-pcie 2920000.pcie: PCI host bridge to bus 0002:00
[    4.358337] pci_bus 0002:00: root bus resource [bus 00-0f]
[    4.363809] pci_bus 0002:00: root bus resource [io  0x20000-0x2ffff] (bus address [0x1000-0x10fff])
[    4.372834] pci_bus 0002:00: root bus resource [mem 0x4400011000-0x4407ffffff] (bus address [0x00011000-0x07ffffff])
[    4.383344] pci 0002:00:00.0: [104c:b00d] type 01 class 0x060400
[    4.389406] pci 0002:00:00.0: supports D1
[    4.393404] pci 0002:00:00.0: PME# supported from D0 D1 D3hot
[    4.400879] pci 0002:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
[    4.408935] pci 0002:01:00.0: [1344:6001] type 00 class 0x010802
[    4.414981] pci 0002:01:00.0: reg 0x10: [mem 0x00000000-0x00003fff 64bit]
[    4.422030] pci 0002:01:00.0: 15.752 Gb/s available PCIe bandwidth, limited by 8 GT/s x2 link at 0002:00:00.0 (capable of 31.504 Gb/s with)
[    4.446727] pci_bus 0002:01: busn_res: [bus 01-0f] end is updated to 01
[    4.453340] pci 0002:00:00.0: BAR 14: assigned [mem 0x4400100000-0x44001fffff]
[    4.460548] pci 0002:01:00.0: BAR 0: assigned [mem 0x4400100000-0x4400103fff 64bit]
[    4.468203] pci 0002:00:00.0: PCI bridge to [bus 01]
[    4.473157] pci 0002:00:00.0:   bridge window [mem 0x4400100000-0x44001fffff]
[    4.480346] pcieport 0002:00:00.0: enabling device (0000 -> 0002)
[    4.486565] pcieport 0002:00:00.0: PME: Signaling with IRQ 483
[    4.492532] pcieport 0002:00:00.0: AER: enabled with IRQ 483
[    4.501040] ti-udma 285c0000.dma-controller: Channels: 24 (tchan: 12, rchan: 12, gp-rflow: 8)
[    4.513960] ti-udma 31150000.dma-controller: Channels: 84 (tchan: 42, rchan: 42, gp-rflow: 16)
[    4.546053] cadence-qspi 47040000.spi: PHY calibration failed: -2
[    4.552149] spi-nor spi0.0: mt35xu512aba (65536 Kbytes)
[    4.557372] 8 cmdlinepart partitions found on MTD device 47040000.spi.0
[    4.563970] Creating 8 MTD partitions on "47040000.spi.0":
[    4.569445] 0x000000000000-0x000000080000 : "ospi.tiboot3"
[    4.575527] 0x000000080000-0x000000280000 : "ospi.tispl"
[    4.581240] 0x000000280000-0x000000680000 : "ospi.u-boot"
[    4.587100] 0x000000680000-0x0000006a0000 : "ospi.env"
[    4.592613] 0x0000006a0000-0x0000006c0000 : "ospi.env.backup"
[    4.598811] 0x0000006c0000-0x0000007c0000 : "ospi.sysfw"
[    4.604543] 0x000000800000-0x000003fe0000 : "ospi.rootfs"
[    4.610417] 0x000003fe0000-0x000004000000 : "ospi.phypattern"
[    4.625769] spi-nor spi1.0: mt25qu512a (65536 Kbytes)
[    4.669073] davinci_mdio 46000f00.mdio: davinci mdio revision 9.7, bus freq 1000000
[    4.676720] libphy: 46000f00.mdio: probed
[    4.680932] mdio_bus 46000f00.mdio: MDIO device at address 0 is missing.
[    4.687633] am65-cpsw-nuss 46000000.ethernet: initializing am65 cpsw nuss version 0x6BA00101, cpsw version 0x6BA80100 Ports: 2 quirks:00000
[    4.705079] am65-cpsw-nuss 46000000.ethernet: set new flow-id-base 48
[    4.713841] am65-cpsw-nuss 46000000.ethernet: initialized cpsw ale version 57.4
[    4.721136] am65-cpsw-nuss 46000000.ethernet: ALE Table size 64
[    4.728234] am65-cpsw-nuss 46000000.ethernet: CPTS ver 0x4e8a010a, freq:500000000, add_val:1 pps:0
[    4.742794] davinci-mcasp 2ba0000.mcasp: IRQ common not found
[    4.781829] debugfs: Directory 'pd:242' with parent 'pm_genpd' already present!
[    4.789222] debugfs: Directory 'pd:241' with parent 'pm_genpd' already present!
[    4.796529] debugfs: Directory 'pd:240' with parent 'pm_genpd' already present!
[    4.803899] debugfs: Directory 'pd:239' with parent 'pm_genpd' already present!
[    4.811942] gpio-keys gpio-keys: ############################[debug] gpio key probed ################################
[    4.822661] input: gpio-keys as /devices/platform/gpio-keys/input/input0
[    4.829838] hctosys: unable to open rtc device (rtc0)
[    4.948851] ALSA device list:
[    4.951816]   No soundcards found.
[    4.963692] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
[    4.971816] VFS: Mounted root (ext4 filesystem) on device 179:2.
[    4.979338] devtmpfs: mounted
[    4.982757] Freeing unused kernel memory: 1664K
[    4.987319] Run /sbin/init as init process
[    5.092490] systemd[1]: System time before build time, advancing clock.
[    5.130024] NET: Registered protocol family 10
[    5.135007] Segment Routing with IPv6
[    5.153119] systemd[1]: systemd 244.3+ running in system mode. (+PAM -AUDIT -SELINUX +IMA -APPARMOR -SMACK +SYSVINIT +UTMP -LIBCRYPTSETUP )
[    5.174911] systemd[1]: Detected architecture arm64.

Welcome to Arago 2020.09!

Check the print messages related PPS:

[ 0.256743] pps_core: LinuxPPS API ver. 1 registered
[ 0.261812] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>

[ 0.777537] pps pps0: new PPS source ktimer
[ 0.781811] pps pps0: ktimer PPS source registered
[ 0.888508] pps-gpio pps-gpio: failed to request PPS GPIO
[ 0.894034] pps-gpio: probe of pps-gpio failed with error -22

We can find that it failed to request for GPIO.

 

When I added Pinmux_Ctrl and GPIO_Ctrl related probe printing, I found that the PPS request GPIO before GPIO_Ctrl is probed.

I don't know if this probe order is the cause of this problem.

[    0.499933] pinctrl-single 4301c000.pinmux: ###########################[debug]pinctrl probed##########################
[    0.510941] pinctrl-single 4301c000.pinmux: 94 pins, size 376
[    0.516907] pinctrl-single 11c000.pinmux: ###########################[debug]pinctrl probed##########################
[    0.527778] pinctrl-single 11c000.pinmux: 173 pins, size 692

[    0.888508] pps-gpio pps-gpio: failed to request PPS GPIO
[    0.894034] pps-gpio: probe of pps-gpio failed with error -22

[    1.256513] davinci_gpio 42110000.gpio: ###########################[debug]GPIO controller probed##########################
[    1.268435] davinci_gpio 600000.gpio: ###########################[debug]GPIO controller probed##########################
[    1.280132] davinci_gpio 601000.gpio: ###########################[debug]GPIO controller probed##########################

In addition, I can't use PPS to request other GPIO pin successfully.

So How can I use PPS to request for GPIO correctly?Is there a solution to adjust the order or time during the kernel loading.

  • Hi,

    Can you use EPROBE_DEFER return so that you can end up probing again when you have GPIO probed.
    Typically this is how most of the dependencies are taken care. So when you have gpio request not successful in your
    pps driver can you try returning EPROBE_DEFER from your driver probe? The linux framework will automatically
    try to probe again at a later point of time.

    Ex: File: "drivers/gpio/gpio-adnp.c"
    Function: adnp_i2c_probe

    client->irq = irq_of_parse_and_map(np, 0);
    if (!client->irq)
    return -EPROBE_DEFER;

    Similarly when your gpio_request fails in your driver probe you can return EPROBE_DEFER.

    Try if that solves your problem.

    Best Regards,
    Keerthy

  •  According to the way you said, it successfully requested GPIO.And now it works well! Thanks!

  • Great! Glad to hear that. Closing this thread.