Re: EHCI and MUSB do not discover devices without CONFIG_PM

[Ladislav Michl <ladis-6z/3iImG2C8G8FEW9MqTrA@public.gmane.org>]

On Tue, Nov 28, 2017 at 01:09:45PM -0500, Alan Stern wrote:
> The EHCI debugging files require CONFIG_DYNAMIC_DEBUG to be enabled.  
> Oddly enough, the OHCI debugging files do not have the same 
> requirement.  I don't know the reason for this difference.

I see, thanks for suggestion.

USB cable unplugged:
$ cat /sys/kernel/debug/usb/ehci/48064800.ehci/registers 
bus platform, device 48064800.ehci
EHCI Host Controller
EHCI 1.00, rh state running
structural params 0x00001313
capability params 0x00000016
status 0000
command 0010005 (park)=0 ithresh=1 period=512 RUN
intrenable 37 IAA FATAL PCD ERR INT
uframe 0000
port:1 status 001000 0  ACK POWER sig=se0
port:2 status 001000 0  ACK POWER sig=se0
port:3 status 001000 0  ACK POWER sig=se0
irq normal 0 err 0 iaa 0 (lost 0)
complete 0 unlink 0

Plugged:
$ cat /sys/kernel/debug/usb/ehci/48064800.ehci/registers 
bus platform, device 48064800.ehci
EHCI Host Controller
EHCI 1.00, rh state running
structural params 0x00001313
capability params 0x00000016
status 0000
command 0010005 (park)=0 ithresh=1 period=512 RUN
intrenable 37 IAA FATAL PCD ERR INT
uframe 0000
port:1 status 001000 0  ACK POWER sig=se0
port:2 status 001000 0  ACK POWER sig=se0
port:3 status 001000 0  ACK POWER sig=se0
irq normal 0 err 0 iaa 0 (lost 0)
complete 0 unlink 0

$ lsusb -t
/:  Bus 03.Port 1: Dev 1, Class=root_hub, Driver=ehci-omap/3p, 480M
/:  Bus 02.Port 1: Dev 1, Class=root_hub, Driver=musb-hdrc/1p, 480M
/:  Bus 01.Port 1: Dev 1, Class=root_hub, Driver=ohci-platform/3p, 12M

	ladis
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