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* Bug: Toggling green led on Olinuxino Maxi, also toggles USB
@ 2015-04-12 10:06 Stefan Wahren
  2015-04-12 23:18 ` Marek Vasut
  2015-04-13  7:00 ` Peter Chen
  0 siblings, 2 replies; 9+ messages in thread
From: Stefan Wahren @ 2015-04-12 10:06 UTC (permalink / raw)
  To: linux-arm-kernel

Hi,

toggling the green LED (GPIO 65) on Olinuxino Maxi unexpectedly also toggles the
USB Host support.

Here is the console output:

# Switching the led off (USB drive connected)
echo 255 > /sys/class/leds/green/brightness
[  318.650000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11
[  318.650000] ci_hdrc ci_hdrc.0: EHCI Host Controller
[  318.670000] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
[  318.710000] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
[  318.750000] hub 1-0:1.0: USB hub found
[  318.780000] hub 1-0:1.0: 1 port detected
[  319.140000] usb 1-1: new high-speed USB device number 2 using ci_hdrc
[  319.310000] hub 1-1:1.0: USB hub found
[  319.340000] hub 1-1:1.0: 3 ports detected
[  319.640000] usb 1-1.1: new high-speed USB device number 3 using ci_hdrc
[  319.880000] usb 1-1.2: new high-speed USB device number 4 using ci_hdrc
[  320.030000] usb-storage 1-1.2:1.0: USB Mass Storage device detected
[  320.040000] scsi host0: usb-storage 1-1.2:1.0
[  321.090000] scsi 0:0:0:0: Direct-Access     LG       USB Drive        1100
PQ: 0 ANSI: 0 CCS

# Switching the led on (USB drive connected)
echo "0" > /sys/class/leds/green/brightness
[ 1068.890000] ci_hdrc ci_hdrc.0: remove, state 1
[ 1068.890000] usb usb1: USB disconnect, device number 1
[ 1068.920000] usb 1-1: USB disconnect, device number 2
[ 1068.920000] usb 1-1.1: USB disconnect, device number 3
[ 1069.070000] usb 1-1.2: USB disconnect, device number 4
[ 1069.450000] ci_hdrc ci_hdrc.0: USB bus 1 deregistered
[ 1074.460000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11

Kernel: 4.0.0-rc4-next-20150320
Bootloader: U-Boot 2014-10

Harald discovered this problem before me on Olinuxino Mini [1].

I think the problem has something to with USB OTG, because GPIO 65 is on the
same pin for USB_OTG_ID.
My idea was to set "dr_mode" in olinuxino dts explicit to "host" and it works,
but i'm not sure that is the right fix.

Shouldn't chipidea driver complain about missing pinctrl or something else?

Stefan

[1] - https://www.olimex.com/forum/index.php?topic=4271.0

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Bug: Toggling green led on Olinuxino Maxi, also toggles USB
  2015-04-12 10:06 Bug: Toggling green led on Olinuxino Maxi, also toggles USB Stefan Wahren
@ 2015-04-12 23:18 ` Marek Vasut
  2015-04-13  5:59   ` harald at ccbib.org
  2015-04-13  7:00 ` Peter Chen
  1 sibling, 1 reply; 9+ messages in thread
From: Marek Vasut @ 2015-04-12 23:18 UTC (permalink / raw)
  To: linux-arm-kernel

On Sunday, April 12, 2015 at 12:06:10 PM, Stefan Wahren wrote:
> Hi,
> 
> toggling the green LED (GPIO 65) on Olinuxino Maxi unexpectedly also
> toggles the USB Host support.
> 
> Here is the console output:
> 
> # Switching the led off (USB drive connected)
> echo 255 > /sys/class/leds/green/brightness
> [  318.650000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11
> [  318.650000] ci_hdrc ci_hdrc.0: EHCI Host Controller
> [  318.670000] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus
> number 1 [  318.710000] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
> [  318.750000] hub 1-0:1.0: USB hub found
> [  318.780000] hub 1-0:1.0: 1 port detected
> [  319.140000] usb 1-1: new high-speed USB device number 2 using ci_hdrc
> [  319.310000] hub 1-1:1.0: USB hub found
> [  319.340000] hub 1-1:1.0: 3 ports detected
> [  319.640000] usb 1-1.1: new high-speed USB device number 3 using ci_hdrc
> [  319.880000] usb 1-1.2: new high-speed USB device number 4 using ci_hdrc
> [  320.030000] usb-storage 1-1.2:1.0: USB Mass Storage device detected
> [  320.040000] scsi host0: usb-storage 1-1.2:1.0
> [  321.090000] scsi 0:0:0:0: Direct-Access     LG       USB Drive       
> 1100 PQ: 0 ANSI: 0 CCS
> 
> # Switching the led on (USB drive connected)
> echo "0" > /sys/class/leds/green/brightness
> [ 1068.890000] ci_hdrc ci_hdrc.0: remove, state 1
> [ 1068.890000] usb usb1: USB disconnect, device number 1
> [ 1068.920000] usb 1-1: USB disconnect, device number 2
> [ 1068.920000] usb 1-1.1: USB disconnect, device number 3
> [ 1069.070000] usb 1-1.2: USB disconnect, device number 4
> [ 1069.450000] ci_hdrc ci_hdrc.0: USB bus 1 deregistered
> [ 1074.460000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11
> 
> Kernel: 4.0.0-rc4-next-20150320
> Bootloader: U-Boot 2014-10
> 
> Harald discovered this problem before me on Olinuxino Mini [1].
> 
> I think the problem has something to with USB OTG, because GPIO 65 is on
> the same pin for USB_OTG_ID.
> My idea was to set "dr_mode" in olinuxino dts explicit to "host" and it
> works, but i'm not sure that is the right fix.
> 
> Shouldn't chipidea driver complain about missing pinctrl or something else?

Is the MX23_PAD_SSP1_DETECT pin muxed as a GPIO ? ie. you should have such an
entry in the DTS pinmux setup -- MX23_PAD_SSP1_DETECT__GPIO_2_1 .

If it is, then it'd probably mean that the pin state is leaking into the USB
core even if it's muxed as GPIO, in which case this would be a silicon problem.

Best regards,
Marek Vasut

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Bug: Toggling green led on Olinuxino Maxi, also toggles USB
  2015-04-12 23:18 ` Marek Vasut
@ 2015-04-13  5:59   ` harald at ccbib.org
  2015-04-13  6:14     ` Marek Vasut
  0 siblings, 1 reply; 9+ messages in thread
From: harald at ccbib.org @ 2015-04-13  5:59 UTC (permalink / raw)
  To: linux-arm-kernel

On Mon, 13 Apr 2015 01:18:07 +0200, Marek Vasut <marex@denx.de> wrote:
> On Sunday, April 12, 2015 at 12:06:10 PM, Stefan Wahren wrote:
>> Hi,
>> 
>> toggling the green LED (GPIO 65) on Olinuxino Maxi unexpectedly also
>> toggles the USB Host support.
>> 
>> Here is the console output:
>> 
>> # Switching the led off (USB drive connected)
>> echo 255 > /sys/class/leds/green/brightness
>> [  318.650000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11
>> [  318.650000] ci_hdrc ci_hdrc.0: EHCI Host Controller
>> [  318.670000] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus
>> number 1 [  318.710000] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
>> [  318.750000] hub 1-0:1.0: USB hub found
>> [  318.780000] hub 1-0:1.0: 1 port detected
>> [  319.140000] usb 1-1: new high-speed USB device number 2 using
ci_hdrc
>> [  319.310000] hub 1-1:1.0: USB hub found
>> [  319.340000] hub 1-1:1.0: 3 ports detected
>> [  319.640000] usb 1-1.1: new high-speed USB device number 3 using
>> ci_hdrc
>> [  319.880000] usb 1-1.2: new high-speed USB device number 4 using
>> ci_hdrc
>> [  320.030000] usb-storage 1-1.2:1.0: USB Mass Storage device detected
>> [  320.040000] scsi host0: usb-storage 1-1.2:1.0
>> [  321.090000] scsi 0:0:0:0: Direct-Access     LG       USB Drive      

>> 1100 PQ: 0 ANSI: 0 CCS
>> 
>> # Switching the led on (USB drive connected)
>> echo "0" > /sys/class/leds/green/brightness
>> [ 1068.890000] ci_hdrc ci_hdrc.0: remove, state 1
>> [ 1068.890000] usb usb1: USB disconnect, device number 1
>> [ 1068.920000] usb 1-1: USB disconnect, device number 2
>> [ 1068.920000] usb 1-1.1: USB disconnect, device number 3
>> [ 1069.070000] usb 1-1.2: USB disconnect, device number 4
>> [ 1069.450000] ci_hdrc ci_hdrc.0: USB bus 1 deregistered
>> [ 1074.460000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11
>> 
>> Kernel: 4.0.0-rc4-next-20150320
>> Bootloader: U-Boot 2014-10
>> 
>> Harald discovered this problem before me on Olinuxino Mini [1].
>> 
>> I think the problem has something to with USB OTG, because GPIO 65 is
on
>> the same pin for USB_OTG_ID.
>> My idea was to set "dr_mode" in olinuxino dts explicit to "host" and it
>> works, but i'm not sure that is the right fix.
>> 
>> Shouldn't chipidea driver complain about missing pinctrl or something
>> else?
> 
> Is the MX23_PAD_SSP1_DETECT pin muxed as a GPIO ? ie. you should have
such
> an
> entry in the DTS pinmux setup -- MX23_PAD_SSP1_DETECT__GPIO_2_1 .

Yes:
led_pin_gpio2_1: led_gpio2_1 at 0 {
	reg = <0>;
	fsl,pinmux-ids = <
		MX23_PAD_SSP1_DETECT__GPIO_2_1
	>;
	fsl,drive-strength = <MXS_DRIVE_4mA>;
	fsl,voltage = <MXS_VOLTAGE_HIGH>;
	fsl,pull-up = <MXS_PULL_DISABLE>;
};

> If it is, then it'd probably mean that the pin state is leaking into the
> USB
> core even if it's muxed as GPIO, in which case this would be a silicon
> problem.

Well, silicon problem or not: It is actually documented in the iMX23
Reference Manual 37.2.2: 
| Readback registers are never affected by the operation of the
| HW_PINCTRL_MUXSELx registers and always sense the actual value
| on the data pin.
|
| For example, if a pin is programmed to be a GPIO output and then
| driven high, any specialized hardware interfaces that are actively
| monitoring that pin will read the high logic value. Conversely, if
| the pin mux is programmed to give a specialized hardware interface
| such as the EMI block control of a particular pin, the current state
| of that pin can be read through its GPIO read register at any time,
| even while active EMI cycles are in progress.

So it seems like the driver has to take care not to read pins it isn't
actually in charge of.

HTH,
Harald

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Bug: Toggling green led on Olinuxino Maxi, also toggles USB
  2015-04-13  5:59   ` harald at ccbib.org
@ 2015-04-13  6:14     ` Marek Vasut
  0 siblings, 0 replies; 9+ messages in thread
From: Marek Vasut @ 2015-04-13  6:14 UTC (permalink / raw)
  To: linux-arm-kernel

On Monday, April 13, 2015 at 07:59:29 AM, harald at ccbib.org wrote:
> On Mon, 13 Apr 2015 01:18:07 +0200, Marek Vasut <marex@denx.de> wrote:
> > On Sunday, April 12, 2015 at 12:06:10 PM, Stefan Wahren wrote:
> >> Hi,
> >> 
> >> toggling the green LED (GPIO 65) on Olinuxino Maxi unexpectedly also
> >> toggles the USB Host support.
> >> 
> >> Here is the console output:
> >> 
> >> # Switching the led off (USB drive connected)
> >> echo 255 > /sys/class/leds/green/brightness
> >> [  318.650000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11
> >> [  318.650000] ci_hdrc ci_hdrc.0: EHCI Host Controller
> >> [  318.670000] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus
> >> number 1 [  318.710000] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
> >> [  318.750000] hub 1-0:1.0: USB hub found
> >> [  318.780000] hub 1-0:1.0: 1 port detected
> >> [  319.140000] usb 1-1: new high-speed USB device number 2 using
> 
> ci_hdrc
> 
> >> [  319.310000] hub 1-1:1.0: USB hub found
> >> [  319.340000] hub 1-1:1.0: 3 ports detected
> >> [  319.640000] usb 1-1.1: new high-speed USB device number 3 using
> >> ci_hdrc
> >> [  319.880000] usb 1-1.2: new high-speed USB device number 4 using
> >> ci_hdrc
> >> [  320.030000] usb-storage 1-1.2:1.0: USB Mass Storage device detected
> >> [  320.040000] scsi host0: usb-storage 1-1.2:1.0
> >> [  321.090000] scsi 0:0:0:0: Direct-Access     LG       USB Drive
> >> 
> >> 1100 PQ: 0 ANSI: 0 CCS
> >> 
> >> # Switching the led on (USB drive connected)
> >> echo "0" > /sys/class/leds/green/brightness
> >> [ 1068.890000] ci_hdrc ci_hdrc.0: remove, state 1
> >> [ 1068.890000] usb usb1: USB disconnect, device number 1
> >> [ 1068.920000] usb 1-1: USB disconnect, device number 2
> >> [ 1068.920000] usb 1-1.1: USB disconnect, device number 3
> >> [ 1069.070000] usb 1-1.2: USB disconnect, device number 4
> >> [ 1069.450000] ci_hdrc ci_hdrc.0: USB bus 1 deregistered
> >> [ 1074.460000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11
> >> 
> >> Kernel: 4.0.0-rc4-next-20150320
> >> Bootloader: U-Boot 2014-10
> >> 
> >> Harald discovered this problem before me on Olinuxino Mini [1].
> >> 
> >> I think the problem has something to with USB OTG, because GPIO 65 is
> 
> on
> 
> >> the same pin for USB_OTG_ID.
> >> My idea was to set "dr_mode" in olinuxino dts explicit to "host" and it
> >> works, but i'm not sure that is the right fix.
> >> 
> >> Shouldn't chipidea driver complain about missing pinctrl or something
> >> else?
> > 
> > Is the MX23_PAD_SSP1_DETECT pin muxed as a GPIO ? ie. you should have
> 
> such
> 
> > an
> > entry in the DTS pinmux setup -- MX23_PAD_SSP1_DETECT__GPIO_2_1 .
> 
> Yes:
> led_pin_gpio2_1: led_gpio2_1 at 0 {
> 	reg = <0>;
> 	fsl,pinmux-ids = <
> 		MX23_PAD_SSP1_DETECT__GPIO_2_1
> 
> 	>;
> 
> 	fsl,drive-strength = <MXS_DRIVE_4mA>;
> 	fsl,voltage = <MXS_VOLTAGE_HIGH>;
> 	fsl,pull-up = <MXS_PULL_DISABLE>;
> };
> 
> > If it is, then it'd probably mean that the pin state is leaking into the
> > USB
> > core even if it's muxed as GPIO, in which case this would be a silicon
> > problem.
> 
> Well, silicon problem or not: It is actually documented in the iMX23
> 
> Reference Manual 37.2.2:
> | Readback registers are never affected by the operation of the
> | HW_PINCTRL_MUXSELx registers and always sense the actual value
> | on the data pin.
> | 
> | For example, if a pin is programmed to be a GPIO output and then
> | driven high, any specialized hardware interfaces that are actively
> | monitoring that pin will read the high logic value. Conversely, if
> | the pin mux is programmed to give a specialized hardware interface
> | such as the EMI block control of a particular pin, the current state
> | of that pin can be read through its GPIO read register at any time,
> | even while active EMI cycles are in progress.
> 
> So it seems like the driver has to take care not to read pins it isn't
> actually in charge of.

Yikes. But good find, thanks!

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Bug: Toggling green led on Olinuxino Maxi, also toggles USB
  2015-04-12 10:06 Bug: Toggling green led on Olinuxino Maxi, also toggles USB Stefan Wahren
  2015-04-12 23:18 ` Marek Vasut
@ 2015-04-13  7:00 ` Peter Chen
  2015-04-13 16:39   ` Stefan Wahren
  1 sibling, 1 reply; 9+ messages in thread
From: Peter Chen @ 2015-04-13  7:00 UTC (permalink / raw)
  To: linux-arm-kernel

On Sun, Apr 12, 2015 at 12:06:10PM +0200, Stefan Wahren wrote:
> Hi,
> 
> toggling the green LED (GPIO 65) on Olinuxino Maxi unexpectedly also toggles the
> USB Host support.
> 
> Here is the console output:
> 
> # Switching the led off (USB drive connected)
> echo 255 > /sys/class/leds/green/brightness
> [  318.650000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11
> [  318.650000] ci_hdrc ci_hdrc.0: EHCI Host Controller
> [  318.670000] ci_hdrc ci_hdrc.0: new USB bus registered, assigned bus number 1
> [  318.710000] ci_hdrc ci_hdrc.0: USB 2.0 started, EHCI 1.00
> [  318.750000] hub 1-0:1.0: USB hub found
> [  318.780000] hub 1-0:1.0: 1 port detected
> [  319.140000] usb 1-1: new high-speed USB device number 2 using ci_hdrc
> [  319.310000] hub 1-1:1.0: USB hub found
> [  319.340000] hub 1-1:1.0: 3 ports detected
> [  319.640000] usb 1-1.1: new high-speed USB device number 3 using ci_hdrc
> [  319.880000] usb 1-1.2: new high-speed USB device number 4 using ci_hdrc
> [  320.030000] usb-storage 1-1.2:1.0: USB Mass Storage device detected
> [  320.040000] scsi host0: usb-storage 1-1.2:1.0
> [  321.090000] scsi 0:0:0:0: Direct-Access     LG       USB Drive        1100
> PQ: 0 ANSI: 0 CCS
> 
> # Switching the led on (USB drive connected)
> echo "0" > /sys/class/leds/green/brightness
> [ 1068.890000] ci_hdrc ci_hdrc.0: remove, state 1
> [ 1068.890000] usb usb1: USB disconnect, device number 1
> [ 1068.920000] usb 1-1: USB disconnect, device number 2
> [ 1068.920000] usb 1-1.1: USB disconnect, device number 3
> [ 1069.070000] usb 1-1.2: USB disconnect, device number 4
> [ 1069.450000] ci_hdrc ci_hdrc.0: USB bus 1 deregistered
> [ 1074.460000] ci_hdrc ci_hdrc.0: timeout waiting for 00000800 in 11
> 
> Kernel: 4.0.0-rc4-next-20150320
> Bootloader: U-Boot 2014-10
> 
> Harald discovered this problem before me on Olinuxino Mini [1].
> 
> I think the problem has something to with USB OTG, because GPIO 65 is on the
> same pin for USB_OTG_ID.
> My idea was to set "dr_mode" in olinuxino dts explicit to "host" and it works,
> but i'm not sure that is the right fix.
> 
> Shouldn't chipidea driver complain about missing pinctrl or something else?

Some controllers have dedicated ID pin which doesn't need to configure pinctrl
registers. If the user would like to use role switch function and the
ID pin can be configured by pinctrl subsystem, it needs to set pinctrl
through dts.

> 
> Stefan
> 
> [1] - https://www.olimex.com/forum/index.php?topic=4271.0
> --
> To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> the body of a message to majordomo at vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

-- 

Best Regards,
Peter Chen

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Bug: Toggling green led on Olinuxino Maxi, also toggles USB
  2015-04-13  7:00 ` Peter Chen
@ 2015-04-13 16:39   ` Stefan Wahren
  2015-04-14  8:43     ` Peter Chen
  0 siblings, 1 reply; 9+ messages in thread
From: Stefan Wahren @ 2015-04-13 16:39 UTC (permalink / raw)
  To: linux-arm-kernel

Hi Peter,

> Peter Chen <peter.chen@freescale.com> hat am 13. April 2015 um 09:00
> geschrieben:
>
>
> On Sun, Apr 12, 2015 at 12:06:10PM +0200, Stefan Wahren wrote:
> > [...]
> >
> > I think the problem has something to with USB OTG, because GPIO 65 is on the
> > same pin for USB_OTG_ID.
> > My idea was to set "dr_mode" in olinuxino dts explicit to "host" and it
> > works,
> > but i'm not sure that is the right fix.
> >
> > Shouldn't chipidea driver complain about missing pinctrl or something else?
>
> Some controllers have dedicated ID pin which doesn't need to configure pinctrl
> registers. If the user would like to use role switch function and the
> ID pin can be configured by pinctrl subsystem, it needs to set pinctrl
> through dts.
>

So setting "dr_mode" to "host" is the one and only solution for this case?

>
> Best Regards,
> Peter Chen

Stefan

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Bug: Toggling green led on Olinuxino Maxi, also toggles USB
  2015-04-13 16:39   ` Stefan Wahren
@ 2015-04-14  8:43     ` Peter Chen
  2015-04-14 14:15       ` Fabio Estevam
  0 siblings, 1 reply; 9+ messages in thread
From: Peter Chen @ 2015-04-14  8:43 UTC (permalink / raw)
  To: linux-arm-kernel

 
> >
> > On Sun, Apr 12, 2015 at 12:06:10PM +0200, Stefan Wahren wrote:
> > > [...]
> > >
> > > I think the problem has something to with USB OTG, because GPIO 65
> > > is on the same pin for USB_OTG_ID.
> > > My idea was to set "dr_mode" in olinuxino dts explicit to "host" and
> > > it works, but i'm not sure that is the right fix.
> > >
> > > Shouldn't chipidea driver complain about missing pinctrl or something else?
> >
> > Some controllers have dedicated ID pin which doesn't need to configure
> > pinctrl registers. If the user would like to use role switch function
> > and the ID pin can be configured by pinctrl subsystem, it needs to set
> > pinctrl through dts.
> >
> 
> So setting "dr_mode" to "host" is the one and only solution for this case?
> 
> >
 
>From my point, yes.

Peter

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Bug: Toggling green led on Olinuxino Maxi, also toggles USB
  2015-04-14  8:43     ` Peter Chen
@ 2015-04-14 14:15       ` Fabio Estevam
  2015-04-14 18:37         ` Stefan Wahren
  0 siblings, 1 reply; 9+ messages in thread
From: Fabio Estevam @ 2015-04-14 14:15 UTC (permalink / raw)
  To: linux-arm-kernel

Hi Stefan,

On Tue, Apr 14, 2015 at 5:43 AM, Peter Chen <Peter.Chen@freescale.com> wrote:

>> So setting "dr_mode" to "host" is the one and only solution for this case?

> From my point, yes.

I also agree this could be a good solution.

Care to submit a patch with this fix?

Thanks,

Fabio Estevam

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Bug: Toggling green led on Olinuxino Maxi, also toggles USB
  2015-04-14 14:15       ` Fabio Estevam
@ 2015-04-14 18:37         ` Stefan Wahren
  0 siblings, 0 replies; 9+ messages in thread
From: Stefan Wahren @ 2015-04-14 18:37 UTC (permalink / raw)
  To: linux-arm-kernel

Hi Fabio,

> Fabio Estevam <festevam@gmail.com> hat am 14. April 2015 um 16:15 geschrieben:
>
>
> Hi Stefan,
>
> On Tue, Apr 14, 2015 at 5:43 AM, Peter Chen <Peter.Chen@freescale.com> wrote:
>
> >> So setting "dr_mode" to "host" is the one and only solution for this case?
>
> > From my point, yes.
>
> I also agree this could be a good solution.
>
> Care to submit a patch with this fix?

i will send patch. Since all iMX233-Olinuxino variants have only USB hosts it
would be easy.

>
> Thanks,
>
> Fabio Estevam
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Stefan

^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2015-04-14 18:37 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-04-12 10:06 Bug: Toggling green led on Olinuxino Maxi, also toggles USB Stefan Wahren
2015-04-12 23:18 ` Marek Vasut
2015-04-13  5:59   ` harald at ccbib.org
2015-04-13  6:14     ` Marek Vasut
2015-04-13  7:00 ` Peter Chen
2015-04-13 16:39   ` Stefan Wahren
2015-04-14  8:43     ` Peter Chen
2015-04-14 14:15       ` Fabio Estevam
2015-04-14 18:37         ` Stefan Wahren

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