While boot testing arm x15 devices the Kernel warning noticed with linux next tag 20200825. BAD: next-20200825 GOOD: next-20200824 metadata: git branch: master git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git commit: 3a00d3dfd4b68b208ecd5405e676d06c8ad6bb63 git describe: next-20200825 make_kernelversion: 5.9.0-rc2 kernel-config: https://builds.tuxbuild.com/LDTu4GFMmvkJspza5LJIjQ/kernel.config We are working on git bisect and boot testing on x15 and get back to you. warning log: ----------------- [ 13.330201] sdhci-pltfm: SDHCI platform and OF driver helper [ 13.352903] omap_gpio 4805d000.gpio: Could not set line 27 debounce to 200000 microseconds (-22) [ 13.361767] sdhci-omap 4809c000.mmc: Got CD GPIO [ 13.366885] sdhci-omap 4809c000.mmc: supply vqmmc not found, using dummy regulator [ 13.374716] ------------[ cut here ]------------ [ 13.379414] WARNING: CPU: 0 PID: 21 at drivers/opp/core.c:678 dev_pm_opp_set_rate+0x4cc/0x5d4 [ 13.387999] Modules linked in: [ 13.391089] CPU: 0 PID: 21 Comm: kworker/0:1 Not tainted 5.9.0-rc2-next-20200825 #1 [ 13.398779] Hardware name: Generic DRA74X (Flattened Device Tree) [ 13.404908] Workqueue: events dbs_work_handler [ 13.409378] Backtrace: [ 13.411852] [<c040e860>] (dump_backtrace) from [<c040ebd4>] (show_stack+0x20/0x24) [ 13.419460] r7:c20cca94 r6:00000000 r5:60000013 r4:c20cca94 [ 13.425153] [<c040ebb4>] (show_stack) from [<c0941338>] (dump_stack+0xec/0x118) [ 13.432505] [<c094124c>] (dump_stack) from [<c0451530>] (__warn+0xe8/0x100) [ 13.439501] r10:e8b50600 r9:00000009 r8:c105f6f4 r7:000002a6 r6:c105f6f4 r5:00000009 [ 13.447369] r4:00000000 r3:c2004f30 [ 13.450968] [<c0451448>] (__warn) from [<c04518fc>] (warn_slowpath_fmt+0x74/0xc4) [ 13.458485] r7:000002a6 r6:c1b42034 r5:00000000 r4:e9b50000 [ 13.464174] [<c045188c>] (warn_slowpath_fmt) from [<c105f6f4>] (dev_pm_opp_set_rate+0x4cc/0x5d4) [ 13.472999] r9:e8b50280 r8:e9b50000 r7:ffffffea r6:3b9aca00 r5:59682f00 r4:e8902c00 [ 13.480783] [<c105f228>] (dev_pm_opp_set_rate) from [<c106aa8c>] (set_target+0x3c/0x64) [ 13.488824] r10:00000002 r9:00000000 r8:c22b508c r7:c2227048 r6:0016e360 r5:00000000 [ 13.496688] r4:e8903000 [ 13.499243] [<c106aa50>] (set_target) from [<c1064ca0>] (__cpufreq_driver_target+0x2d0/0x628) [ 13.507808] r7:c2227048 r6:e9b50000 r5:00000000 r4:e8903000 [ 13.513499] [<c10649d0>] (__cpufreq_driver_target) from [<c1069040>] (od_dbs_update+0x14c/0x170) [ 13.522327] r10:c2204070 r9:e8b50880 r8:e8b50800 r7:e8b51440 r6:e8b50880 r5:e8b50800 [ 13.530192] r4:e8903000 [ 13.532741] [<c1068ef4>] (od_dbs_update) from [<c1069d5c>] (dbs_work_handler+0x3c/0x68) [ 13.540783] r9:00000000 r8:c21d902c r7:e8903000 r6:e8b50804 r5:00000000 r4:e8b50838 [ 13.548572] [<c1069d20>] (dbs_work_handler) from [<c046f204>] (process_one_work+0x200/0x560) [ 13.557051] r9:00000000 r8:00000000 r7:efc2c600 r6:efc29300 r5:e9b24500 r4:e8b50838 [ 13.564833] [<c046f004>] (process_one_work) from [<c046f5b0>] (worker_thread+0x4c/0x57c) [ 13.572963] r10:efc29300 r9:00000008 r8:c2003d00 r7:efc29318 r6:e9b24514 r5:efc29300 [ 13.580828] r4:e9b24500 [ 13.583381] [<c046f564>] (worker_thread) from [<c04773e0>] (kthread+0x144/0x170) [ 13.590812] r10:e9979e7c r9:e9b24500 r8:c046f564 r7:e9b50000 r6:00000000 r5:e9b25b80 [ 13.598675] r4:e99c0140 [ 13.601228] [<c047729c>] (kthread) from [<c040024c>] (ret_from_fork+0x14/0x28) [ 13.608484] Exception stack(0xe9b51fb0 to 0xe9b51ff8) [ 13.613559] 1fa0: 00000000 00000000 00000000 00000000 [ 13.621777] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 13.629994] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 13.636642] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c047729c [ 13.644506] r4:e9b25b80 [ 13.647118] ---[ end trace 4ddd29ac9505935c ]--- [ 13.651768] cpu cpu0: multiple regulators are not supported [ # 13.655036] usb 1-1: new high-speed USB device number 2 using xhci-hcd [ 13.657394] cpufreq: __target_index: Failed to change cpu frequency: -22 [ 13.670803] ------------[ cut here ]------------ [ 13.675501] WARNING: CPU: 0 PID: 21 at drivers/opp/core.c:678 dev_pm_opp_set_rate+0x4cc/0x5d4 [ 13.684068] Modules linked in: [ 13.687178] CPU: 0 PID: 21 Comm: kworker/0:1 Tainted: G W 5.9.0-rc2-next-20200825 #1 [ 13.696267] Hardware name: Generic DRA74X (Flattened Device Tree) [ 13.702394] Workqueue: events dbs_work_handler [ 13.706861] Backtrace: [ 13.709334] [<c040e860>] (dump_backtrace) from [<c040ebd4>] (show_stack+0x20/0x24) [ 13.716942] r7:c20cca94 r6:00000000 r5:60000013 r4:c20cca94 [ 13.722633] [<c040ebb4>] (show_stack) from [<c0941338>] (dump_stack+0xec/0x118) [ 13.729983] [<c094124c>] (dump_stack) from [<c0451530>] (__warn+0xe8/0x100) [ 13.736978] r10:e8b50600 r9:00000009 r8:c105f6f4 r7:000002a6 r6:c105f6f4 r5:00000009 [ 13.744844] r4:00000000 r3:c2004f30 [ 13.748442] [<c0451448>] (__warn) from [<c04518fc>] (warn_slowpath_fmt+0x74/0xc4) [ 13.755960] r7:000002a6 r6:c1b42034 r5:00000000 r4:e9b50000 [ 13.761649] [<c045188c>] (warn_slowpath_fmt) from [<c105f6f4>] (dev_pm_opp_set_rate+0x4cc/0x5d4) [ 13.770479] r9:e8b50280 r8:e9b50000 r7:ffffffea r6:3b9aca00 r5:59682f00 r4:e8902c00 [ 13.778263] [<c105f228>] (dev_pm_opp_set_rate) from [<c106aa8c>] (set_target+0x3c/0x64) [ 13.786304] r10:00000002 r9:00000000 r8:c22b508c r7:c2227048 r6:0016e360 r5:00000000 [ 13.794168] r4:e8903000 [ 13.796717] [<c106aa50>] (set_target) from [<c1064ca0>] (__cpufreq_driver_target+0x2d0/0x628) [ 13.805281] r7:c2227048 r6:e9b50000 r5:00000000 r4:e8903000 [ 13.810971] [<c10649d0>] (__cpufreq_driver_target) from [<c1069040>] (od_dbs_update+0x14c/0x170) [ 13.819797] r10:c2204070 r9:e8b50880 r8:e8b50800 r7:e8b51440 r6:e8b50880 r5:e8b50800 [ 13.827662] r4:e8903000 [ 13.830213] [<c1068ef4>] (od_dbs_update) from [<c1069d5c>] (dbs_work_handler+0x3c/0x68) [ 13.838256] r9:00000000 r8:c21d902c r7:e8903000 r6:e8b50804 r5:00000000 r4:e8b50838 [ 13.846042] [<c1069d20>] (dbs_work_handler) from [<c046f204>] (process_one_work+0x200/0x560) [ 13.854518] r9:00000000 r8:00000000 r7:efc2c600 r6:efc29300 r5:e9b24500 r4:e8b50838 [ 13.862301] [<c046f004>] (process_one_work) from [<c046f5b0>] (worker_thread+0x4c/0x57c) [ 13.870431] r10:efc29300 r9:00000008 r8:c2003d00 r7:efc29318 r6:e9b24514 r5:efc29300 [ 13.878295] r4:e9b24500 [ 13.880846] [<c046f564>] (worker_thread) from [<c04773e0>] (kthread+0x144/0x170) [ 13.888278] r10:e9979e7c r9:e9b24500 r8:c046f564 r7:e9b50000 r6:00000000 r5:e9b25b80 [ 13.896144] r4:e99c0140 [ 13.898694] [<c047729c>] (kthread) from [<c040024c>] (ret_from_fork+0x14/0x28) [ 13.905948] Exception stack(0xe9b51fb0 to 0xe9b51ff8) [ 13.911024] 1fa0: 00000000 00000000 00000000 00000000 [ 13.919241] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 13.927457] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 13.934104] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c047729c [ 13.941967] r4:e9b25b80 [ 13.944558] ---[ end trace 4ddd29ac9505935d ]--- [ 13.949228] cpu cpu0: multiple regulators are not supported [ 13.954832] cpufreq: __target_index: Failed to change cpu frequency: -22 # [ 13.961638] ------------[ cut here ]------------ [ 13.961941] sdhci-omap 4809c000.mmc: no pinctrl state for ddr_3_3v mode [ 13.966303] WARNING: CPU: 0 PID: 21 at drivers/opp/core.c:678 dev_pm_opp_set_rate+0x4cc/0x5d4 [ 13.966311] Modules linked in: [ 13.984620] CPU: 0 PID: 21 Comm: kworker/0:1 Tainted: G W 5.9.0-rc2-next-20200825 #1 [ 13.993706] Hardware name: Generic DRA74X (Flattened Device Tree) [ 13.999833] Workqueue: events dbs_work_handler [ 14.004301] Backtrace: [ 14.006772] [<c040e860>] (dump_backtrace) from [<c040ebd4>] (show_stack+0x20/0x24) [ 14.014379] r7:c20cca94 r6:00000000 r5:60000013 r4:c20cca94 [ 14.020071] [<c040ebb4>] (show_stack) from [<c0941338>] (dump_stack+0xec/0x118) [ 14.027418] [<c094124c>] (dump_stack) from [<c0451530>] (__warn+0xe8/0x100) [ 14.034416] r10:e8b50600 r9:00000009 r8:c105f6f4 r7:000002a6 r6:c105f6f4 r5:00000009 [ 14.042282] r4:00000000 r3:c2004f30 [ 14.045878] [<c0451448>] (__warn) from [<c04518fc>] (warn_slowpath_fmt+0x74/0xc4) [ 14.053394] r7:000002a6 r6:c1b42034 r5:00000000 r4:e9b50000 [ 14.059082] [<c045188c>] (warn_slowpath_fmt) from [<c105f6f4>] (dev_pm_opp_set_rate+0x4cc/0x5d4) [ 14.067912] r9:e8b50280 r8:e9b50000 r7:ffffffea r6:3b9aca00 r5:59682f00 r4:e8902c00 [ 14.075695] [<c105f228>] (dev_pm_opp_set_rate) from [<c106aa8c>] (set_target+0x3c/0x64) [ 14.083736] r10:00000002 r9:00000000 r8:c22b508c r7:c2227048 r6:0016e360 r5:00000000 [ 14.091600] r4:e8903000 [ 14.094150] [<c106aa50>] (set_target) from [<c1064ca0>] (__cpufreq_driver_target+0x2d0/0x628) [ 14.102715] r7:c2227048 r6:e9b50000 r5:00000000 r4:e8903000 [ 14.108403] [<c10649d0>] (__cpufreq_driver_target) from [<c1069040>] (od_dbs_update+0x14c/0x170) [ 14.117229] r10:c2204070 r9:e8b50880 r8:e8b50800 r7:e8b51440 r6:e8b50880 r5:e8b50800 [ 14.125094] r4:e8903000 [ 14.127646] [<c1068ef4>] (od_dbs_update) from [<c1069d5c>] (dbs_work_handler+0x3c/0x68) [ 14.135690] r9:00000000 r8:c21d902c r7:e8903000 r6:e8b50804 r5:00000000 r4:e8b50838 [ 14.143476] [<c1069d20>] (dbs_work_handler) from [<c046f204>] (process_one_work+0x200/0x560) [ 14.151954] r9:00000000 r8:00000000 r7:efc2c600 r6:efc29300 r5:e9b24500 r4:e8b50838 [ 14.159737] [<c046f004>] (process_one_work) from [<c046f5b0>] (worker_thread+0x4c/0x57c) [ 14.167867] r10:efc29300 r9:00000008 r8:c2003d00 r7:efc29318 r6:e9b24514 r5:efc29300 [ 14.175732] r4:e9b24500 [ 14.178282] [<c046f564>] (worker_thread) from [<c04773e0>] (kthread+0x144/0x170) [ 14.185715] r10:e9979e7c r9:e9b24500 r8:c046f564 r7:e9b50000 r6:00000000 r5:e9b25b80 [ 14.193578] r4:e99c0140 [ 14.196127] [<c047729c>] (kthread) from [<c040024c>] (ret_from_fork+0x14/0x28) [ 14.203381] Exception stack(0xe9b51fb0 to 0xe9b51ff8) [ 14.208458] 1fa0: 00000000 00000000 00000000 00000000 [ 14.216674] 1fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 14.224889] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 14.231536] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:c047729c [ 14.239400] r4:e9b25b80 [ 14.242012] ---[ end trace 4ddd29ac9505935e ]--- [ 14.246695] cpu cpu0: multiple regulators are not supported [ 14.252301] cpufreq: __target_index: Failed to change cpu frequency: -22 [ 14.259160] ------------[ cut here ]------------ [ 14.263821] WARNIN# G: CPU: 0 PID: 21 at drivers/opp/core.c:678 dev_pm_opp_set_rate+0x4cc/0x5d4 [ 14.272406] Modules linked in: [ 14.275542] CPU: 0 PID: 21 Comm: kworker/0:1 Tainted: G W 5.9.0-rc2-next-20200825 #1 [ 14.284629] Hardware name: Generic DRA74X (Flattened Device Tree) [ 14.290756] Workqueue: events dbs_work_handler [ 14.295223] Backtrace: Full log, https://pastebin.com/HwTf2VMA -- Linaro LKFT https://lkft.linaro.org