arm64: dts: imx8mp-verdin: prevent emmc crash

Heavy bandwidth use of the eMMC leads to a unrecoverable kernel crash.
Fix this by limiting the maximum frequency used.

`hdparm -t /dev/mmcblk2` or `cat /dev/mmcblk2 > /dev/null` produce the
following kernel debug output:

| root@verdin-imx8mp-06775464:~# uname -a
| Linux verdin-imx8mp-06775464 5.15.40-05907-ga69fc9b0472d #2 SMP PREEMPT Wed Aug 31 18:51:37 CEST 2022 aarch64 aarch64 aarch64 GNU/Linux
| root@verdin-imx8mp-06775464:~# hdparm -t /dev/mmcblk2
|
| /dev/mmcblk2:
|  Timing buffered disk reads: 688 MB in  3.01 seconds = 228.81 MB/sec

[   96.899831] audit: type=1701 audit(1661965049.536:4): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=917 comm="hdparm" exe="/sbin/hdparm.hdparm" sig=4 res=1
[   96.900136] Unable to handle kernel paging request at virtual address 00746f6e20746f6c
[   96.900724] Unable to handle kernel paging request at virtual address 00746f6e20746f6c
[   96.900729] Mem abort info:
[   96.900731]   ESR = 0x96000004
[   96.900734]   EC = 0x25: DABT (current EL), IL = 32 bits
[   96.900737]   SET = 0, FnV = 0
[   96.900739]   EA = 0, S1PTW = 0
[   96.900741]   FSC = 0x04: level 0 translation fault
[   96.900743] Data abort info:
[   96.900745]   ISV = 0, ISS = 0x00000004
[   96.900747]   CM = 0, WnR = 0
[   96.900749] [00746f6e20746f6c] address between user and kernel address ranges
[   96.900753] Internal error: Oops: 96000004 [#1] PREEMPT SMP
[   96.900757] Modules linked in: bluetooth mwifiex_sdio snd_soc_fsl_sai crct10dif_ce mwifiex cfg80211 rfkill imx_sdma snd_soc_nau8822 ina2xx lm75 flexcan caam can_dev secvio error panel_lvds fuse
[   96.900797] CPU: 1 PID: 239 Comm: systemd-journal Not tainted 5.15.40-05907-ga69fc9b0472d #2
[   96.900802] Hardware name: Toradex Verdin iMX8M Plus WB on Verdin Development Board (DT)
[   96.900806] pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   96.900811] pc : lock_page_memcg+0x38/0xc0
[   96.900825] lr : lock_page_memcg+0x2c/0xc0
[   96.900830] sp : ffff80000a30b980
[   96.900832] x29: ffff80000a30b980 x28: ffff80000a30bb88 x27: 0000ffff8661a000
[   96.900840] x26: 0000ffff86619000 x25: ffff0000c617dc00 x24: 0000000000000000
[   96.900847] x23: fffffc0000041a80 x22: ffff80000a30bab8 x21: 20746f6e207465ac
[   96.900854] x20: fffffc0000041a80 x19: 20746f6e2074616c x18: 00000000fffffffc
[   96.900861] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000002
[   96.900868] x14: 0000000000000000 x13: 000000000012a558 x12: ffff0000c75dd005
[   96.900875] x11: 0000000000000000 x10: ffff8001f576c000 x9 : 0000000000000003
[   96.900883] x8 : fffffc0003138788 x7 : ffff8001f576c000 x6 : 0000000000000000
[   96.900889] x5 : 000000000004106a x4 : 00000000ffffffff x3 : ffff0000c617dc00
[   96.900896] x2 : 0000000000000000 x1 : ffff0000c0740e00 x0 : 20746f6e207465ac
[   96.900904] Call trace:
[   96.900907]  lock_page_memcg+0x38/0xc0
[   96.900912]  page_remove_rmap+0x20/0x3c0
[   96.900919]  unmap_page_range+0x558/0x87c
[   96.900925]  unmap_vmas+0x9c/0x15c
[   96.900930]  exit_mmap+0x68/0x1a4
[   96.900936]  __mmput+0x38/0x14c
[   96.900943]  mmput+0x48/0x54
[   96.900947]  do_exit+0x2c0/0x970
[   96.900952]  do_group_exit+0x3c/0xa0
[   96.900956]  get_signal+0x144/0x760
[   96.900962]  do_notify_resume+0x224/0x130c
[   96.900969]  el0_undef+0x48/0x60
[   96.900978]  el0t_64_sync_handler+0x130/0x1b0
[   96.900983]  el0t_64_sync+0x1a0/0x1a4
[   96.900990] Code: 97fa3cde d503201f f90013f5 1400000f (b94e0261)
[   96.900995] ---[ end trace f024570fb29b7f38 ]---
[   96.900998] note: systemd-journal[239] exited with preempt_count 1
[   96.901001] Fixing recursive fault but reboot is needed!
[   96.901004] ------------[ cut here ]------------
[   96.901006] Voluntary context switch within RCU read-side critical section!
[   96.901021] WARNING: CPU: 1 PID: 239 at kernel/rcu/tree_plugin.h:316 rcu_note_context_switch+0x34c/0x3a4
[   96.901030] Modules linked in: bluetooth mwifiex_sdio snd_soc_fsl_sai crct10dif_ce mwifiex cfg80211 rfkill imx_sdma snd_soc_nau8822 ina2xx lm75 flexcan caam can_dev secvio error panel_lvds fuse
[   96.901058] CPU: 1 PID: 239 Comm: systemd-journal Tainted: G      D           5.15.40-05907-ga69fc9b0472d #2
[   96.901063] Hardware name: Toradex Verdin iMX8M Plus WB on Verdin Development Board (DT)
[   96.901065] pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   96.901070] pc : rcu_note_context_switch+0x34c/0x3a4
[   96.901074] lr : rcu_note_context_switch+0x34c/0x3a4
[   96.901079] sp : ffff80000a30b530
[   96.901081] x29: ffff80000a30b530 x28: ffff80000a30b6f3 x27: ffff8000094a2cb8
[   96.901089] x26: 0000000000000001 x25: ffff0000c0740e00 x24: ffff800009c0c000
[   96.901096] x23: 0000000000000000 x22: ffff0000c0740e00 x21: ffff0001fef492c0
[   96.901103] x20: ffff8000097ddfc0 x19: ffff0001fef49fc0 x18: fffffffffffe9148
[   96.901110] x17: 65676e6172207373 x16: 000000000000002d x15: 0000000000000048
[   96.901117] x14: 0000000000000000 x13: 216e6f6974636573 x12: 206c616369746972
[   96.901124] x11: 6320656469732d64 x10: 6165722055435220 x9 : 206e696874697720
[   96.901131] x8 : ffff800009a71eb0 x7 : ffff80000a30b330 x6 : 00000000fffff220
[   96.901138] x5 : ffff0001fef429d0 x4 : 0000000000000000 x3 : 0000000000000027
[   96.901145] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c0740e00
[   96.901152] Call trace:
[   96.901153]  rcu_note_context_switch+0x34c/0x3a4
[   96.901158]  __schedule+0xb8/0x754
[   96.901163]  schedule+0x74/0x10c
[   96.901167]  do_exit+0x968/0x970
[   96.901171]  die+0x1f4/0x230
[   96.901175]  die_kernel_fault+0x64/0x7c
[   96.901181]  __do_kernel_fault+0x90/0x190
[   96.901186]  do_translation_fault+0x5c/0xcc
[   96.901191]  do_mem_abort+0x44/0xbc
[   96.901195]  el1_abort+0x40/0x6c
[   96.901199]  el1h_64_sync_handler+0xb4/0xd0
[   96.901202]  el1h_64_sync+0x78/0x7c
[   96.901206]  lock_page_memcg+0x38/0xc0
[   96.901211]  page_remove_rmap+0x20/0x3c0
[   96.901215]  unmap_page_range+0x558/0x87c
[   96.901220]  unmap_vmas+0x9c/0x15c
[   96.901224]  exit_mmap+0x68/0x1a4
[   96.901229]  __mmput+0x38/0x14c
[   96.901233]  mmput+0x48/0x54
[   96.901238]  do_exit+0x2c0/0x970
[   96.901241]  do_group_exit+0x3c/0xa0
[   96.901246]  get_signal+0x144/0x760
[   96.901250]  do_notify_resume+0x224/0x130c
[   96.901255]  el0_undef+0x48/0x60
[   96.901261]  el0t_64_sync_handler+0x130/0x1b0
[   96.901265]  el0t_64_sync+0x1a0/0x1a4
[   96.901269] ---[ end trace f024570fb29b7f39 ]---
[   96.903683] Unable to handle kernel paging request at virtual address 00746f6e20746f6c
[   96.903688] Mem abort info:
[   96.903690]   ESR = 0x96000004
[   96.903692]   EC = 0x25: DABT (current EL), IL = 32 bits
[   96.903695]   SET = 0, FnV = 0
[   96.903697]   EA = 0, S1PTW = 0
[   96.903699]   FSC = 0x04: level 0 translation fault
[   96.903702] Data abort info:
[   96.903703]   ISV = 0, ISS = 0x00000004
[   96.903705]   CM = 0, WnR = 0
[   96.903707] [00746f6e20746f6c] address between user and kernel address ranges
[   96.903710] Internal error: Oops: 96000004 [#2] PREEMPT SMP
[   96.903713] Modules linked in: bluetooth mwifiex_sdio snd_soc_fsl_sai crct10dif_ce mwifiex cfg80211 rfkill imx_sdma snd_soc_nau8822 ina2xx lm75 flexcan caam can_dev secvio error panel_lvds fuse
[   96.903742] CPU: 1 PID: 619 Comm: klogd Tainted: G      D W         5.15.40-05907-ga69fc9b0472d #2
[   96.903746] Hardware name: Toradex Verdin iMX8M Plus WB on Verdin Development Board (DT)
[   96.903749] pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   96.903754] pc : lock_page_memcg+0x38/0xc0
[   96.903760] lr : lock_page_memcg+0x2c/0xc0
[   96.903764] sp : ffff80000a5db980
[   96.903766] x29: ffff80000a5db980 x28: ffff80000a5dbb88 x27: 0000ffff820b4000
[   96.903774] x26: 0000ffff820b3000 x25: ffff0000c1bb7240 x24: 0000000000000000
[   96.903781] x23: fffffc0000041a80 x22: ffff80000a5dbab8 x21: 20746f6e207465ac
[   96.903788] x20: fffffc0000041a80 x19: 20746f6e2074616c x18: 00000000fffffffc
[   96.903795] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000002
[   96.903801] x14: 0000000000000000 x13: 000000000012a558 x12: ffff0000c75dd005
[   96.903808] x11: 0000000000000000 x10: 000000000000002e x9 : 0000000000000000
[   96.903816] x8 : 0000000000000000 x7 : ffff8001f576c000 x6 : 0000000000000000
[   96.903822] x5 : 000000000004106a x4 : 00000000ffffffff x3 : ffff0000c1bb7240
[   96.903829] x2 : 0000000000000000 x1 : ffff0000c6c14600 x0 : 20746f6e207465ac
[   96.903836] Call trace:
[   96.903838]  lock_page_memcg+0x38/0xc0
[   96.903843]  page_remove_rmap+0x20/0x3c0
[   96.903847]  unmap_page_range+0x558/0x87c
[   96.903851]  unmap_vmas+0x9c/0x15c
[   96.903856]  exit_mmap+0x68/0x1a4
[   96.903861]  __mmput+0x38/0x14c
[   96.903866]  mmput+0x48/0x54
[   96.903870]  do_exit+0x2c0/0x970
[   96.903874]  do_group_exit+0x3c/0xa0
[   96.903878]  get_signal+0x144/0x760
[   96.903882]  do_notify_resume+0x224/0x130c
[   96.903888]  el0_undef+0x48/0x60
[   96.903893]  el0t_64_sync_handler+0x130/0x1b0
[   96.903897]  el0t_64_sync+0x1a0/0x1a4
[   96.903903] Code: 97fa3cde d503201f f90013f5 1400000f (b94e0261)
[   96.903907] ---[ end trace f024570fb29b7f3a ]---
[   96.903909] note: klogd[619] exited with preempt_count 1
[   96.903912] Fixing recursive fault but reboot is needed!
[   96.913892] audit: type=1701 audit(1661965049.536:5): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=239 comm="systemd-journal" exe="/lib/systemd/systemd-journald" sig=4 res=1
[   96.913901] audit: type=1701 audit(1661965049.536:6): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=619 comm="klogd" exe="/bin/busybox.nosuid" sig=4 res=1
[   97.701098] Mem abort info:
[   97.703895]   ESR = 0x96000004
[   97.706947]   EC = 0x25: DABT (current EL), IL = 32 bits
[   97.712262]   SET = 0, FnV = 0
[   97.715313]   EA = 0, S1PTW = 0
[   97.718457]   FSC = 0x04: level 0 translation fault
[   97.723337] Data abort info:
[   97.726218]   ISV = 0, ISS = 0x00000004
[   97.730056]   CM = 0, WnR = 0
[   97.733026] [00746f6e20746f6c] address between user and kernel address ranges
[   97.740163] Internal error: Oops: 96000004 [#3] PREEMPT SMP
[   97.745733] Modules linked in: bluetooth mwifiex_sdio snd_soc_fsl_sai crct10dif_ce mwifiex cfg80211 rfkill imx_sdma snd_soc_nau8822 ina2xx lm75 flexcan caam can_dev secvio error panel_lvds fuse
[   97.762966] CPU: 3 PID: 917 Comm: hdparm Tainted: G      D W         5.15.40-05907-ga69fc9b0472d #2
[   97.772009] Hardware name: Toradex Verdin iMX8M Plus WB on Verdin Development Board (DT)
[   97.780094] pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   97.787054] pc : lock_page_memcg+0x38/0xc0
[   97.791151] lr : lock_page_memcg+0x2c/0xc0
[   97.795246] sp : ffff80001b6ab980
[   97.798556] x29: ffff80001b6ab980 x28: ffff80001b6abb88 x27: 0000ffff811f7000
[   97.805693] x26: 0000ffff811f6000 x25: ffff0000cab943c0 x24: 0000000000000000
[   97.812829] x23: fffffc0000041a80 x22: ffff80001b6abab8 x21: 20746f6e207465ac
[   97.819966] x20: fffffc0000041a80 x19: 20746f6e2074616c x18: 00000000fffffffc
[   97.827101] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000002
[   97.834237] x14: 0000000000000000 x13: 000000000012a558 x12: ffff0000c6639405
[   97.841374] x11: 0000000000000000 x10: 000000000000002e x9 : 0000000000000000
[   97.848509] x8 : 0000000000000000 x7 : ffff8001f5794000 x6 : ffffffffffffffff
[   97.855645] x5 : 000000000004106a x4 : 00000000ffffffff x3 : ffff0000cab943c0
[   97.862781] x2 : 0000000000000000 x1 : ffff0000c0716200 x0 : 20746f6e207465ac
[   97.869917] Call trace:
[   97.872362]  lock_page_memcg+0x38/0xc0
[   97.876111]  page_remove_rmap+0x20/0x3c0
[   97.880032]  unmap_page_range+0x558/0x87c
[   97.884040]  unmap_vmas+0x9c/0x15c
[   97.887440]  exit_mmap+0x68/0x1a4
[   97.890756]  __mmput+0x38/0x14c
[   97.893897]  mmput+0x48/0x54
[   97.896776]  do_exit+0x2c0/0x970
[   97.900002]  do_group_exit+0x3c/0xa0
[   97.903576]  get_signal+0x144/0x760
[   97.907063]  do_notify_resume+0x224/0x130c
[   97.911158]  el0_undef+0x48/0x60
[   97.914386]  el0t_64_sync_handler+0x130/0x1b0
[   97.918741]  el0t_64_sync+0x1a0/0x1a4
[   97.922403] Code: 97fa3cde d503201f f90013f5 1400000f (b94e0261)
[   97.928495] ---[ end trace f024570fb29b7f3b ]---
[   97.933121] note: hdparm[917] exited with preempt_count 1
[   97.938759] Fixing recursive fault but reboot is needed!
[   98.846252] Unable to handle kernel paging request at virtual address 006140011e602020
[   98.846279] audit: type=1701 audit(1661965051.480:7): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=930 comm="systemd" exe="/lib/systemd/systemd" sig=7 res=1
[   98.854511] Mem abort info:
[   98.871475] audit: type=1701 audit(1661965051.480:8): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=931 comm="systemd" exe="/lib/systemd/systemd" sig=11 res=1
[   98.871802]   ESR = 0x96000004
[   98.888857] audit: type=1701 audit(1661965051.480:9): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=933 comm="systemd" exe="/lib/systemd/systemd" sig=11 res=1
[   98.888947]   EC = 0x25: DABT (current EL), IL = 32 bits
[   98.907393] audit: type=1701 audit(1661965051.488:10): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=934 comm="systemd" exe="/lib/systemd/systemd" sig=11 res=1
[   98.908588]   SET = 0, FnV = 0
[   98.922807] audit: type=1701 audit(1661965051.488:11): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=935 comm="systemd" exe="/lib/systemd/systemd" sig=11 res=1
[   98.925870]   EA = 0, S1PTW = 0
[   98.940229] audit: type=1701 audit(1661965051.488:12): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=936 comm="systemd" exe="/lib/systemd/systemd" sig=11 res=1
[   98.943354]   FSC = 0x04: level 0 translation fault
[   98.960004] audit: type=1701 audit(1661965051.488:13): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=939 comm="systemd" exe="/lib/systemd/systemd" sig=11 res=1
[   98.963297] Data abort info:
[   98.979852]   ISV = 0, ISS = 0x00000004
[   98.983892]   CM = 0, WnR = 0
[   98.987544] [006140011e602020] address between user and kernel address ranges
[   98.994927] Internal error: Oops: 96000004 [#4] PREEMPT SMP
[   99.000509] Modules linked in: bluetooth mwifiex_sdio snd_soc_fsl_sai crct10dif_ce mwifiex cfg80211 rfkill imx_sdma snd_soc_nau8822 ina2xx lm75 flexcan caam can_dev secvio error panel_lvds fuse
[   99.017755] CPU: 0 PID: 930 Comm: systemd Tainted: G      D W         5.15.40-05907-ga69fc9b0472d #2
[   99.026888] Hardware name: Toradex Verdin iMX8M Plus WB on Verdin Development Board (DT)
[   99.034976] pstate: 00000005 (nzcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   99.041938] pc : __d_lookup+0x60/0x170
[   99.045697] lr : __d_lookup+0x44/0x170
[   99.049449] sp : ffff80001b84ba10
[   99.052762] x29: ffff80001b84ba10 x28: 0000000000000000 x27: 0000000000000000
[   99.059901] x26: ffff800009c56b38 x25: ffffffffffffffff x24: ffff80001b84bb68
[   99.067040] x23: ffff0000c24b06c0 x22: ffff0000c24b06c0 x21: 00000000b953fdd3
[   99.074178] x20: ffff0001f6600000 x19: 1e6140011e602008 x18: 00000000fffffffc
[   99.081315] x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000020
[   99.088453] x14: ffffffffffffffff x13: ffff0000c6639480 x12: ffff0000c6639405
[   99.095591] x11: 0000000000000000 x10: 000000000000002e x9 : ffff800009a6fb50
[   99.102728] x8 : 0101010101010101 x7 : d0a3a0b1bdffb6d0 x6 : 00000000000000b8
[   99.109866] x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff80001b84bb68
[   99.117004] x2 : ffff800009a5b000 x1 : ffff0000c1869c00 x0 : 0000000000000001
[   99.124143] Call trace:
[   99.126589]  __d_lookup+0x60/0x170
[   99.129995]  d_lookup+0x44/0x70
[   99.133137]  lookup_dcache+0x24/0x84
[   99.136712]  __lookup_hash+0x24/0xd0
[   99.140286]  do_unlinkat+0x134/0x270
[   99.143860]  do_coredump+0xbf4/0x1410
[   99.147522]  get_signal+0x380/0x760
[   99.151011]  do_notify_resume+0x16c/0x130c
[   99.155110]  el0_svc+0x4c/0x60
[   99.158169]  el0t_64_sync_handler+0x1a8/0x1b0
[   99.162526]  el0t_64_sync+0x1a0/0x1a4
[   99.166190] Code: 54000081 14000011 f9400273 b40001f3 (b9401a62)
[   99.172283] ---[ end trace f024570fb29b7f3c ]---
[   99.217876] ------------[ cut here ]------------
[   99.219715] Unable to handle kernel NULL pointer dereference at virtual address 00000000000001a7
[   99.222507] WARNING: CPU: 2 PID: 37 at mm/slub.c:4529 __ksize+0xc8/0xd0
[   99.231325] Mem abort info:
[   99.237896] Modules linked in: bluetooth mwifiex_sdio snd_soc_fsl_sai crct10dif_ce mwifiex
[   99.240696]   ESR = 0x96000004
[   99.240697]  cfg80211 rfkill
[   99.248964]   EC = 0x25: DABT (current EL), IL = 32 bits
[   99.252004]  imx_sdma snd_soc_nau8822 ina2xx lm75
[   99.254883]   SET = 0, FnV = 0
[   99.260189]  flexcan caam can_dev secvio
[   99.264895]   EA = 0, S1PTW = 0
[   99.267940]  error panel_lvds fuse
[   99.271865]   FSC = 0x04: level 0 translation fault
[   99.274997] CPU: 2 PID: 37 Comm: kauditd Tainted: G      D W         5.15.40-05907-ga69fc9b0472d #2
[   99.278407] Data abort info:
[   99.283262] Hardware name: Toradex Verdin iMX8M Plus WB on Verdin Development Board (DT)
[   99.283265] pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   99.292310]   ISV = 0, ISS = 0x00000004
[   99.295180] pc : __ksize+0xc8/0xd0
[   99.303283]   CM = 0, WnR = 0
[   99.310218] lr : ksize+0x1c/0x30
[   99.310224] sp : ffff80000a203ca0
[   99.314070] user pgtable: 4k pages, 48-bit VAs, pgdp=00000001019fc000
[   99.317449] x29: ffff80000a203ca0 x28: ffff0000f90f6800 x27: 0000000000000000
[   99.320421] [00000000000001a7] pgd=0000000000000000
[   99.323638]
[   99.323641] x26: 0000000000000001 x25: 0000000000000000
[   99.326951] , p4d=0000000000000000
[   99.333385]  x24: 00000000ffffffff
[   99.333388] x23: 0000000000000cc0 x22: ffff0000c0200400
[   99.340522]
[   99.345389]  x21: 0000000000000000
[   99.345392] x20: ffff0000c13c7800 x19: ffff0000f861bc00 x18: 00000000fffffffb
[   99.345399] x17: 000000040044ffff
[   99.346885] Internal error: Oops: 96000004 [#5] PREEMPT SMP
[   99.352103]  x16: 00400032b5503510
[   99.355498] Modules linked in:
[   99.358894]  x15: 0000000000000000
[   99.364113]  bluetooth
[   99.365599]
[   99.368994]  mwifiex_sdio
[   99.376122] x14: ffff0000c00d5400
[   99.379431]  snd_soc_fsl_sai
[   99.384997]  x13: ffff8001f5780000
[   99.388392]  crct10dif_ce
[   99.391441]  x12: 0000000034d4d91d
[   99.394836]  mwifiex
[   99.397190]
[   99.398676]  cfg80211
[   99.401292] x11: 0000000000000000
[   99.404601]  rfkill
[   99.407476]  x10: 00000000000009c0
[   99.410871]  imx_sdma
[   99.413486]  x9 : ffff80000a203d40
[   99.416882]  snd_soc_nau8822
[   99.419062]
[   99.420547]  ina2xx
[   99.422814] x8 : ffff0000c021de20
[   99.426123]  lm75
[   99.428217]  x7 : ffff0001fef5d340
[   99.431613]  flexcan
[   99.433880]  x6 : ffff800009aeb4d0
[   99.437275]  caam
[   99.440150]
[   99.441636]  can_dev
[   99.443729] x5 : 0000000000000000
[   99.447038]  secvio
[   99.448957]  x4 : ffff80000a203c50
[   99.452353]  error
[   99.454534]  x3 : 0000000000000001
[   99.457929]  panel_lvds
[   99.459849]
[   99.461335]  fuse
[   99.463515] x2 : 0000000000000000
[   99.466823]
[   99.468917]  x1 : fffffc000304f1c0
[   99.472313] CPU: 1 PID: 1 Comm: systemd Tainted: G      D W         5.15.40-05907-ga69fc9b0472d #2
[   99.474320]  x0 : 0000000000000000
[   99.477715] Hardware name: Toradex Verdin iMX8M Plus WB on Verdin Development Board (DT)
[   99.480156]
[   99.481642] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   99.483563] Call trace:
[   99.486871] pc : kmem_cache_alloc+0xdc/0x294
[   99.488360]  __ksize+0xc8/0xd0
[   99.491753] lr : kmem_cache_alloc+0x80/0x294
[   99.500704]  __alloc_skb+0xa0/0x1fc
[   99.504099] sp : ffff800009cdba80
[   99.512183]  skb_copy+0x44/0xb0
[   99.513668] x29: ffff800009cdba80
[   99.520622]  kauditd_send_multicast_skb+0x74/0xc0
[   99.523063]  x28: ffff0000c17579c0
[   99.527327]  kauditd_send_queue+0x68/0x1b0
[   99.530375]  x27: 0000000000000000
[   99.534639]  kauditd_thread+0x29c/0x320
[   99.538121]
[   99.541430]  kthread+0x154/0x160
[   99.544565] x26: ffff0000c17579c0
[   99.547874]  ret_from_fork+0x10/0x20
[   99.552572]  x25: ffff800009a58000
[   99.555968] ---[ end trace f024570fb29b7f3d ]---
[   99.560057]  x24: ffff0000c1757a38
[   99.563502] ------------[ cut here ]------------
[   99.567282]
[   99.567283] x23: ffff0000c0078000
[   99.568769] WARNING: CPU: 3 PID: 37 at mm/slub.c:4529 __ksize+0xc8/0xd0
[   99.571991]  x22: 0000000000002800
[   99.575300] Modules linked in:
[   99.578869] x21: 0000000000000000
[   99.582265]  bluetooth
[   99.586876]
[   99.590272]  mwifiex_sdio
[   99.594883] x20: ffff800008224004
[   99.596369]  snd_soc_fsl_sai
[   99.599678]  x19: ffff0000c0005700
[   99.606285]  crct10dif_ce
[   99.609681]  x18: 0000000000000000
[   99.612729]  mwifiex
[   99.616125]
[   99.618479]  cfg80211
[   99.619965] x17: 0000000000000000
[   99.622579]  rfkill
[   99.625888]  x16: 0000000000000000
[   99.628763]  imx_sdma
[   99.632158]  x15: ffff0000c183a108
[   99.634773]  snd_soc_nau8822
[   99.638169]
[   99.640349]  ina2xx
[   99.641834] x14: ffff0000c1839290
[   99.644101]  lm75
[   99.647410]  x13: ffff0000c183a108
[   99.649504]  flexcan
[   99.652899]  x12: ffff0000c1839290
[   99.655166]  caam
[   99.658562]
[   99.661437]  can_dev
[   99.662922] x11: 0000000000000000
[   99.665016]  secvio
[   99.668325]  x10: 0000000000000000
[   99.670244]  error
[   99.673640]  x9 : 0000000000000000
[   99.675821]  panel_lvds
[   99.679216]
[   99.681135]  fuse
[   99.682621] x8 : ffff0000c183b500
[   99.684801]
[   99.688110]  x7 : 0000000000000016
[   99.690204] CPU: 3 PID: 37 Comm: kauditd Tainted: G      D W         5.15.40-05907-ga69fc9b0472d #2
[   99.693599]  x6 : ffff80000909e708
[   99.695606] Hardware name: Toradex Verdin iMX8M Plus WB on Verdin Development Board (DT)
[   99.699002]
[   99.701443] pstate: 40000005 (nZcv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   99.702928] x5 : ffff0000f9f4a240
[   99.704848] pc : __ksize+0xc8/0xd0
[   99.708157]  x4 : ffff800009cdbb80
[   99.709643] lr : ksize+0x1c/0x30
[   99.713038]  x3 : 0000000000000001
[   99.722076] sp : ffff80000a203ca0
[   99.725472]
[   99.733555] x29: ffff80000a203ca0
[   99.735041] x2 : 0000000000000020
[   99.741996]  x28: ffff0000f90f6800
[   99.745305]  x1 : 0000000000738601
[   99.748701]  x27: 0000000000000000
[   99.752097]  x0 : 0000000000000187
[   99.755319]
[   99.758714]
[   99.762023] x26: 0000000000000001
[   99.763508] Call trace:
[   99.766816]  x25: 0000000000000000
[   99.770126]  kmem_cache_alloc+0xdc/0x294
[   99.773521]  x24: 00000000ffffffff
[   99.776916]  anon_vma_clone+0x70/0x1dc
[   99.780311]
[   99.783707]  anon_vma_fork+0x30/0x1b0
[   99.785193] x23: 0000000000000cc0
[   99.786678]  dup_mm+0x39c/0x544
[   99.789986]  x22: ffff0000c0200400
[   99.792427]  copy_process+0x1210/0x1524
[   99.795822]  x21: 0000000000000000
[   99.799739]  kernel_clone+0x5c/0x3c0
[   99.803134]
[   99.806878]  __do_sys_clone+0x54/0x80
[   99.808363] x20: ffff0000c13c7800
[   99.812019]  __arm64_sys_clone+0x24/0x30
[   99.815328]  x19: ffff0000f861bc00
[   99.818463]  invoke_syscall+0x48/0x114
[   99.821858]  x18: 00000000fffffffb
[   99.825688]  el0_svc_common.constprop.0+0x44/0xec
[   99.829084]
[   99.832655]  do_el0_svc+0x28/0x90
[   99.834140] x17: 000000040044ffff
[   99.837796]  el0_svc+0x20/0x60
[   99.841105]  x16: 00400032b5503510
[   99.845022]  el0t_64_sync_handler+0x1a8/0x1b0
[   99.848417]  x15: 0000000000000000
[   99.852160]  el0t_64_sync+0x1a0/0x1a4
[   99.855555]
[   99.860256] Code: 54000d40 b9402a62 b9400ae3 11000463 (f862681a)
[   99.861739] x14: ffff0000c00d5400
[   99.865052] ---[ end trace f024570fb29b7f3e ]---
[   99.868357]  x13: ffff8001f5780000
[   99.871424] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[   99.874800]  x12: 0000000034d4d91d
[   99.879152] SMP: stopping secondary CPUs
[   99.882547]
[   99.921538] x11: 0000000000000000 x10: 00000000000009c0 x9 : ffff80000a203d40
[   99.928674] x8 : ffff0000c021de20 x7 : ffff0001fef5d340 x6 : ffff800009aeb4d0
[   99.935810] x5 : 0000000000000000 x4 : ffff80000a203c50 x3 : 0000000000000001
[   99.942946] x2 : 0000000000000000 x1 : fffffc000304f1c0 x0 : 0000000000000000
[   99.950081] Call trace:
[   99.952524]  __ksize+0xc8/0xd0
[   99.955577]  __alloc_skb+0xe0/0x1fc
[   99.959066]  skb_copy+0x44/0xb0
[   99.962206]  kauditd_send_multicast_skb+0x74/0xc0
[   99.966910]  kauditd_send_queue+0x68/0x1b0
[   99.971005]  kauditd_thread+0x29c/0x320
[   99.974839]  kthread+0x154/0x160
[   99.978066]  ret_from_fork+0x10/0x20
[   99.981640] ---[ end trace f024570fb29b7f3f ]---
[   99.986264] Kernel Offset: disabled
[   99.989748] CPU features: 0x00002001,20000846
[   99.994102] Memory Limit: none
[   99.997158] ---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b ]---

It happens also on vanilla 6.0-rc3.

It does seem to work on imx8mp-evk with an unchanged NXP BSP
| root@imx8mpevk:~# uname -a
| Linux imx8mpevk 5.15.32-lts-next+gfa6c3168595c #1 SMP PREEMPT Tue Jun 7 02:34:46 UTC 2022 aarch64 aarch64 aarch64 GNU/Linux
| root@imx8mpevk:~# cat /dev/mmcblk2 > /dev/null
| root@imx8mpevk:~#

Upstream-Status: Pending [Not yet the solution]
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
index 969899414096..6bae1e039782 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
@@ -927,6 +927,7 @@
 	assigned-clocks = <&clk IMX8MP_CLK_USDHC3_ROOT>;
 	assigned-clock-rates = <400000000>;
 	bus-width = <8>;
+	max-frequency = <100000000>;
 	non-removable;
 	pinctrl-names = "default", "state_100mhz", "state_200mhz";
 	pinctrl-0 = <&pinctrl_usdhc3>;