lkml.org 
[lkml]   [2019]   [Feb]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCHv3 2/2] ARM64: dts: meson-gxbb-odroidc2: Fix usb phy regulator power failed warning
Hi Anand,

On Tue, Jan 29, 2019 at 11:25 AM Anand Moon <linux.amoon@gmail.com> wrote:
>
> Override the dr_mode from "host" to "otg" for USB_HOST controller (usb0)
> changes help usb_phy0->usb0 initialization of OTG bus port.
>
> Changes fix the below warning.
>
> [ 1.183681] dwc2 c9000000.usb: c9000000.usb supply vusb_d not found, using dummy regulator
> [ 1.190627] dwc2 c9000000.usb: Linked as a consumer to regulator.0
> [ 1.196696] dwc2 c9000000.usb: c9000000.usb supply vusb_a not found, using dummy regulator
> [ 1.206094] phy phy-c0000000.phy.0: USB ID detect failed!
> [ 1.210243] phy phy-c0000000.phy.0: phy poweron failed --> -22
I wonder if the warning below are a side-effect of "phy poweron failed"...

> [ 1.216072] WARNING: CPU: 0 PID: 78 at drivers/regulator/core.c:2054 _regulator_put.part.11+0xf0/0xf8
> [ 1.225147] Modules linked in:
> [ 1.228169] CPU: 0 PID: 78 Comm: kworker/0:1 Not tainted 5.0.0-rc4-xc2ml #1
> [ 1.235066] Hardware name: Hardkernel ODROID-C2 (DT)
> [ 1.239987] Workqueue: events deferred_probe_work_func
> [ 1.245072] pstate: 80000005 (Nzcv daif -PAN -UAO)
> [ 1.249816] pc : _regulator_put.part.11+0xf0/0xf8
> [ 1.254473] lr : regulator_put+0x34/0x48
> [ 1.258353] sp : ffff0000117b3b00
> [ 1.261630] x29: ffff0000117b3b00 x28: 0000000000000000
> [ 1.266891] x27: ffff80007ec1a7b8 x26: ffff000010eec280
> [ 1.272153] x25: 0000000000000000 x24: 0000000000000009
> [ 1.277414] x23: ffff0000117b3bc8 x22: ffff80007ecd3c00
> [ 1.282675] x21: ffff0000111ad6c8 x20: ffff80007ecd3e00
> [ 1.287936] x19: ffff80007ecd3e00 x18: 0000000000000124
> [ 1.293198] x17: 0000000000000000 x16: 0000000000000000
> [ 1.298459] x15: 0000000000000400 x14: 0000000000000400
> [ 1.303720] x13: ff00000000000000 x12: ffffffffffffffff
> [ 1.308981] x11: 0000000000000038 x10: 0000000000000040
> [ 1.314243] x9 : ffff0000111c58b0 x8 : ffff0000111c58a8
> [ 1.319504] x7 : ffff80006b055200 x6 : ffff80007edd2880
> [ 1.324765] x5 : ffff80007f400248 x4 : ffff80007fb92b00
> [ 1.330026] x3 : ffff0000112c9d58 x2 : ffff80007edd2880
> [ 1.335288] x1 : 0000000000000000 x0 : 0000000000000001
> [ 1.340549] Call trace:
> [ 1.342966] _regulator_put.part.11+0xf0/0xf8
> [ 1.347278] regulator_put+0x34/0x48
> [ 1.350814] regulator_bulk_free+0x30/0x50
> [ 1.354868] devm_regulator_bulk_release+0x18/0x20
> [ 1.359612] release_nodes+0x1b0/0x220
> [ 1.363320] devres_release_all+0x34/0x50
> [ 1.367288] really_probe+0xec/0x290
> [ 1.370824] driver_probe_device+0x54/0xe8
> [ 1.374878] __device_attach_driver+0xb8/0xe8
> [ 1.379190] bus_for_each_drv+0x78/0xc8
> [ 1.382985] __device_attach+0xd4/0x130
> [ 1.386780] device_initial_probe+0x10/0x18
> [ 1.390920] bus_probe_device+0x90/0x98
> [ 1.394715] deferred_probe_work_func+0x6c/0xa0
> [ 1.399203] process_one_work+0x1e0/0x318
> [ 1.403168] worker_thread+0x228/0x428
> [ 1.406877] kthread+0x124/0x128
> [ 1.410070] ret_from_fork+0x10/0x18
> [ 1.413603] ---[ end trace 498aca4cb07e5377 ]---
phy_power_on fails above with -EINVAL and then something else breaks
(it seems like you're hitting the WARN_ON in drivers/regulator/core.c
below the comment which states: "Docs say you must disable before
calling regulator_put()")
so this looks like a bug in either the dwc2 driver or the PHY
framework. can you please report that to the dwc2 and PHY maintainers
so it can be fixed independently?


Regards
Martin

\
 
 \ /
  Last update: 2019-02-04 15:07    [W:0.108 / U:0.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site