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Date: Mon, 13 Jan 2020 17:43:55 +0530
From: Sekhar Nori <nsekhar@...com>
To: Peter Ujfalusi <peter.ujfalusi@...com>, <bgolaszewski@...libre.com>
CC: <linux-kernel@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: davinci: dm365-evm: Add Fixed regulators needed for
tlv320aic3101
On 22/10/19 1:12 PM, Peter Ujfalusi wrote:
>
>
> On 21/10/2019 13.40, Peter Ujfalusi wrote:
>>
>>
>> On 17/10/2019 16.49, Sekhar Nori wrote:
>>> On 17/10/19 4:39 PM, Sekhar Nori wrote:
>>>> On 30/08/19 3:52 PM, Peter Ujfalusi wrote:
>>>>> The codec driver needs correct regulators in order to probe.
>>>>> Both VCC_3V3 and VCC_1V8 is always on fixed regulators on the board.
>>>>>
>>>>> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...com>
>>>>
>>>> Applied for v5.4
>>>
>>> This is breaking boot on DM365 EVM.
>>>
>>> Booting Linux on physical CPU 0x0
>>> Linux version 5.4.0-rc1-00001-g927d10a85791-dirty (a0875516@...linux063) (gcc v9
>>> CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=0005317f
>>> CPU: VIVT data cache, VIVT instruction cache
>>> Machine: DaVinci DM365 EVM
>>> Memory policy: Data cache writethrough
>>> cma: Reserved 16 MiB at 0x86c00000
>>> DaVinci dm365_rev1.1 variant 0x0
>>> On node 0 totalpages: 32768
>>> DMA zone: 256 pages used for memmap
>>> DMA zone: 0 pages reserved
>>> DMA zone: 32768 pages, LIFO batch:7
>>> pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
>>> pcpu-alloc: [0] 0
>>> Built 1 zonelists, mobility grouping on. Total pages: 32512
>>> Kernel command line: console=ttyS0,115200n8 root=/dev/nfs rw nfsroot=172.24.210p
>>> Dentry cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
>>> Inode-cache hash table entries: 8192 (order: 3, 32768 bytes, linear)
>>> mem auto-init: stack:off, heap alloc:off, heap free:off
>>> Memory: 106776K/131072K available (4760K kernel code, 253K rwdata, 1160K rodata)
>>> SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
>>> rcu: Preemptible hierarchical RCU implementation.
>>> Tasks RCU enabled.
>>> rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
>>> NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
>>> random: get_random_bytes called from start_kernel+0x25c/0x440 with crng_init=0
>>> clocksource: timer0_1: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79s
>>> sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 89478484971ns
>>> Console: colour dummy device 80x30
>>> Calibrating delay loop... 146.84 BogoMIPS (lpj=734208)
>>> pid_max: default: 32768 minimum: 301
>>> Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
>>> Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
>>> CPU: Testing write buffer coherency: ok
>>> Setting up static identity map for 0x80008400 - 0x80008458
>>> rcu: Hierarchical SRCU implementation.
>>> devtmpfs: initialized
>>> clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 191s
>>> futex hash table entries: 256 (order: -1, 3072 bytes, linear)
>>> pinctrl core: initialized pinctrl subsystem
>>> NET: Registered protocol family 16
>>> DMA: preallocated 256 KiB pool for atomic coherent allocations
>>> mux: initialized INT_EDMA_CC
>>> mux: Setting register INT_EDMA_CC
>>> mux: INTMUX (0x00000018) = 0x00000000 -> 0x00000004
>>> cpuidle: using governor menu
>>> mux: initialized INT_EMAC_RXTHRESH
>>> mux: Setting register INT_EMAC_RXTHRESH
>>> mux: INTMUX (0x00000018) = 0x00000004 -> 0x00004004
>>> mux: initialized INT_EMAC_RXPULSE
>>> mux: Setting register INT_EMAC_RXPULSE
>>> mux: INTMUX (0x00000018) = 0x00004004 -> 0x0000c004
>>> mux: initialized INT_EMAC_TXPULSE
>>> mux: Setting register INT_EMAC_TXPULSE
>>> mux: INTMUX (0x00000018) = 0x0000c004 -> 0x0001c004
>>> mux: initialized INT_EMAC_MISCPULSE
>>> mux: Setting register INT_EMAC_MISCPULSE
>>> mux: INTMUX (0x00000018) = 0x0001c004 -> 0x0003c004
>>> EVM: tvp5146 SD video input
>>> mux: initialized INT_PRTCSS
>>> mux: Setting register INT_PRTCSS
>>> mux: INTMUX (0x00000018) = 0x0003c004 -> 0x0003c404
>>> mux: initialized SPI0_SCLK
>>> mux: Setting register SPI0_SCLK
>>> mux: PINMUX3 (0x0000000c) = 0x015affff -> 0x115affff
>>> mux: initialized SPI0_SDI
>>> mux: Setting register SPI0_SDI
>>> mux: PINMUX3 (0x0000000c) = 0x115affff -> 0x155affff
>>> mux: initialized SPI0_SDO
>>> mux: Setting register SPI0_SDO
>>> mux: PINMUX3 (0x0000000c) = 0x155affff -> 0x175affff
>>> mux: initialized SPI0_SDENA0
>>> mux: Setting register SPI0_SDENA0
>>> mux: PINMUX3 (0x0000000c) = 0x175affff -> 0x375affff
>>> edma edma.0: Legacy memcpy is enabled, things might not work
>>> edma edma.0: TI EDMA DMA engine driver
>>> 8<--- cut here ---
>>> Unable to handle kernel NULL pointer dereference at virtual address 000000c0
>>> pgd = (ptrval)
>>> [000000c0] *pgd=00000000
>>> Internal error: Oops: 5 [#1] PREEMPT ARM
>>> Modules linked in:
>>> CPU: 0 PID: 1 Comm: swapper Not tainted 5.4.0-rc1-00001-g927d10a85791-dirty #146
>>> Hardware name: DaVinci DM365 EVM
>>> PC is at reg_fixed_voltage_probe+0x30/0x2ec
>>> LR is at reg_fixed_voltage_probe+0x2c/0x2ec
>>> pc : [<c02a9628>] lr : [<c02a9624>] psr: 60000053
>>> sp : c6837de0 ip : 00000000 fp : c062cfd8
>>> r10: c05f44a8 r9 : 00000000 r8 : c68a24d0
>>> r7 : c0631008 r6 : c68a24e0 r5 : 00000000 r4 : c68a24e0
>>> r3 : 00000000 r2 : c065a854 r1 : 00000000 r0 : 00000000
>>> Flags: nZCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
>>> Control: 0005317f Table: 80004000 DAC: 00000053
>>> Process swapper (pid: 1, stack limit = 0x(ptrval))
>>> Stack: (0xc6837de0 to 0xc6838000)
>>> 7de0: c689be40 c0167044 00000000 c68f4720 c68f4660 c68f4660 c68f4720 c689be40
>>> 7e00: c0575ca4 64d9cb0d 00000000 c68a24e0 00000000 c065a854 c065a854 00000000
>>> 7e20: 00000000 c05f44a8 c062cfd8 c02e0a64 c68a24e0 c0688d00 00000000 c02dec54
>>> 7e40: c68a24e0 c065a854 c065a854 c0631008 ffffe000 c061e828 c05f44a8 c02def44
>>> 7e60: 00000000 ffffff08 ffff0a00 c68a24e0 00000000 c065a854 c0631008 ffffe000
>>> 7e80: c061e828 c05f44a8 c062cfd8 c02df1f8 00000000 c065a854 c68a24e0 c02df258
>>> 7ea0: c68337b0 c065a854 c02df200 c02dced4 c061e828 c681db90 c68337b0 64d9cb0d
>>> 7ec0: c062cfd8 c065a854 c682af00 c065ea48 00000000 c02de070 c054f984 c0494cc0
>>> 7ee0: c065a854 c065a854 c0631008 c060b098 00000000 c02dfb04 c066d5c0 c0631008
>>> 7f00: c060b098 c000a624 0000007f c7fffea8 c05d00c4 00000000 c7fffee9 c00372e0
>>> 7f20: c05cf6d8 c0549714 00000000 00000004 00000004 00000000 00000000 c7fffee2
>>> 7f40: c7fffee5 64d9cb0d 00000000 0000007f c061e844 64d9cb0d 0000007f c061e848
>>> 7f60: 00000005 c066d5c0 c066d5c0 c05f4e6c 00000004 00000004 00000000 c05f44a8
>>> 7f80: 00000000 00000000 c04a71bc 00000000 00000000 00000000 00000000 00000000
>>> 7fa0: 00000000 c04a71c4 00000000 c00090e0 00000000 00000000 00000000 00000000
>>> 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>> 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
>>> [<c02a9628>] (reg_fixed_voltage_probe) from [<c02e0a64>] (platform_drv_probe+0x)
>>> [<c02e0a64>] (platform_drv_probe) from [<c02dec54>] (really_probe+0x1e0/0x34c)
>>> [<c02dec54>] (really_probe) from [<c02def44>] (driver_probe_device+0x5c/0x168)
>>> [<c02def44>] (driver_probe_device) from [<c02df1f8>] (device_driver_attach+0x58)
>>> [<c02df1f8>] (device_driver_attach) from [<c02df258>] (__driver_attach+0x58/0xc)
>>> [<c02df258>] (__driver_attach) from [<c02dced4>] (bus_for_each_dev+0x70/0xb4)
>>> [<c02dced4>] (bus_for_each_dev) from [<c02de070>] (bus_add_driver+0x194/0x1cc)
>>> [<c02de070>] (bus_add_driver) from [<c02dfb04>] (driver_register+0x74/0x108)
>>> [<c02dfb04>] (driver_register) from [<c000a624>] (do_one_initcall+0x6c/0x1d8)
>>> [<c000a624>] (do_one_initcall) from [<c05f4e6c>] (kernel_init_freeable+0x10c/0x)
>>> [<c05f4e6c>] (kernel_init_freeable) from [<c04a71c4>] (kernel_init+0x8/0xec)
>>> [<c04a71c4>] (kernel_init) from [<c00090e0>] (ret_from_fork+0x14/0x34)
>>> Exception stack(0xc6837fb0 to 0xc6837ff8)
>>> 7fa0: 00000000 00000000 00000000 00000000
>>> 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
>>> 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000
>>> Code: e5920018 e58d3024 eb02b71e e3a03000 (e59090c0)
>>> ---[ end trace 90e87368a248f7f6 ]---
>>> Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
>>
>> Interesting.
>> Something has changed in regulators core which causes crash when not
>> booted with DT?
>>
>> It did worked when I have sent the patches. I'll take a look what might
>> be the issue.
>
> can this be the fix: https://lkml.org/lkml/2019/9/21/199 ?
It seems like, and I confirm it works now! Queuing for v5.6
Thanks,
Sekhar
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