[PATCH v2 0/2] Fix 'no USB device found' error.

[PATCH v2 0/2] Fix 'no USB device found' error.

[Julien Panis]

This series fixes usb0 dr_mode for am335x-icev2
and am335x-evmsk. It must be set to 'peripheral'
in order to avoid 'no USB device found' error,
in usb_ether_init() function.

Signed-off-by: Julien Panis <jpanis@baylibre.com>
---
Changes in v2:
- Drop the modification made in arch/arm/mach-omap2/am33xx/board.c
- Configure usb0 dr_mode as peripheral in 'am335x-icev2-u-boot.dtsi'
  and 'am335x-evmsk-u-boot.dtsi' device trees.
- Link to v1: https://lore.kernel.org/r/20230621-fix_usb_ether_init-v1-1-2156923994a9@baylibre.com

---
Julien Panis (2):
      arm: dts: am335x-icev2-u-boot: Configure peripheral mode for usb0
      arm: dts: am335x-evmsk-u-boot: Configure peripheral mode for usb0

 arch/arm/dts/am335x-evmsk-u-boot.dtsi | 4 ++++
 arch/arm/dts/am335x-icev2-u-boot.dtsi | 4 ++++
 2 files changed, 8 insertions(+)
---
base-commit: 19b77d3d23966a0d6dbb3c86187765f11100fb6f
change-id: 20230621-fix_usb_ether_init-4bf4f1135113

Best regards,
-- 
Julien Panis <jpanis@baylibre.com>

[PATCH v2 1/2] arm: dts: am335x-icev2-u-boot: Configure peripheral mode for usb0

[Julien Panis]

This patch configures usb0 dr_mode as peripheral
on am335x-icev2 board.

Signed-off-by: Julien Panis <jpanis@baylibre.com>
---
 arch/arm/dts/am335x-icev2-u-boot.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/dts/am335x-icev2-u-boot.dtsi b/arch/arm/dts/am335x-icev2-u-boot.dtsi
index 67bfac916eee..7dcd5ec00605 100644
--- a/arch/arm/dts/am335x-icev2-u-boot.dtsi
+++ b/arch/arm/dts/am335x-icev2-u-boot.dtsi
@@ -22,3 +22,7 @@
 		xtal-load-pf = <0>;
 	};
 };
+
+&usb0 {
+	dr_mode = "peripheral";
+};

-- 
2.37.3

[PATCH v2 2/2] arm: dts: am335x-evmsk-u-boot: Configure peripheral mode for usb0

[Julien Panis]

This patch configures usb0 dr_mode as peripheral
on am335x-evmsk board.

Signed-off-by: Julien Panis <jpanis@baylibre.com>
---
 arch/arm/dts/am335x-evmsk-u-boot.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/dts/am335x-evmsk-u-boot.dtsi b/arch/arm/dts/am335x-evmsk-u-boot.dtsi
index 669cb6bf1655..010005c45091 100644
--- a/arch/arm/dts/am335x-evmsk-u-boot.dtsi
+++ b/arch/arm/dts/am335x-evmsk-u-boot.dtsi
@@ -20,3 +20,7 @@
 		};
 	};
 };
+
+&usb0 {
+	dr_mode = "peripheral";
+};

-- 
2.37.3

Re: [PATCH v2 0/2] Fix 'no USB device found' error.

[Tom Rini]

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On Thu, Jun 22, 2023 at 04:34:34PM +0200, Julien Panis wrote:
> This series fixes usb0 dr_mode for am335x-icev2
> and am335x-evmsk. It must be set to 'peripheral'
> in order to avoid 'no USB device found' error,
> in usb_ether_init() function.
> 
> Signed-off-by: Julien Panis <jpanis@baylibre.com>
> ---
> Changes in v2:
> - Drop the modification made in arch/arm/mach-omap2/am33xx/board.c
> - Configure usb0 dr_mode as peripheral in 'am335x-icev2-u-boot.dtsi'
>   and 'am335x-evmsk-u-boot.dtsi' device trees.
> - Link to v1: https://lore.kernel.org/r/20230621-fix_usb_ether_init-v1-1-2156923994a9@baylibre.com
> 
> ---
> Julien Panis (2):
>       arm: dts: am335x-icev2-u-boot: Configure peripheral mode for usb0
>       arm: dts: am335x-evmsk-u-boot: Configure peripheral mode for usb0
> 
>  arch/arm/dts/am335x-evmsk-u-boot.dtsi | 4 ++++
>  arch/arm/dts/am335x-icev2-u-boot.dtsi | 4 ++++
>  2 files changed, 8 insertions(+)

I'll ask the first question that Nishanth might also ask, which is why
don't these belong in the kernel dts files?  Thanks!

-- 
Tom

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Re: [PATCH v2 0/2] Fix 'no USB device found' error.

[Julien Panis]

On 6/22/23 17:49, Tom Rini wrote:
> On Thu, Jun 22, 2023 at 04:34:34PM +0200, Julien Panis wrote:
>> This series fixes usb0 dr_mode for am335x-icev2
>> and am335x-evmsk. It must be set to 'peripheral'
>> in order to avoid 'no USB device found' error,
>> in usb_ether_init() function.
>>
>> Signed-off-by: Julien Panis <jpanis@baylibre.com>
>> ---
>> Changes in v2:
>> - Drop the modification made in arch/arm/mach-omap2/am33xx/board.c
>> - Configure usb0 dr_mode as peripheral in 'am335x-icev2-u-boot.dtsi'
>>    and 'am335x-evmsk-u-boot.dtsi' device trees.
>> - Link to v1: https://lore.kernel.org/r/20230621-fix_usb_ether_init-v1-1-2156923994a9@baylibre.com
>>
>> ---
>> Julien Panis (2):
>>        arm: dts: am335x-icev2-u-boot: Configure peripheral mode for usb0
>>        arm: dts: am335x-evmsk-u-boot: Configure peripheral mode for usb0
>>
>>   arch/arm/dts/am335x-evmsk-u-boot.dtsi | 4 ++++
>>   arch/arm/dts/am335x-icev2-u-boot.dtsi | 4 ++++
>>   2 files changed, 8 insertions(+)
> I'll ask the first question that Nishanth might also ask, which is why
> don't these belong in the kernel dts files?  Thanks!
>

That's a good question. :) Looping Nishanth...
usb0 dr_mode property is already overlayed for am335x-evm,
in 'am335x-evm-u-boot.dtsi'. So, it appeared more consistent
to me to do the same thing for am335x-icev2 and am335x-evmsk.
I guess that the goal is to configure usb0 as host by default at
kernel boot, since we do not necessarily want to use this usb0
as peripheral from userspace.
Is it the right explanation @Vignesh @Nishanth ?

Re: [PATCH v2 0/2] Fix 'no USB device found' error.

[Tom Rini]

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On Fri, Jun 23, 2023 at 09:42:01AM +0200, Julien Panis wrote:
> 
> 
> On 6/22/23 17:49, Tom Rini wrote:
> > On Thu, Jun 22, 2023 at 04:34:34PM +0200, Julien Panis wrote:
> > > This series fixes usb0 dr_mode for am335x-icev2
> > > and am335x-evmsk. It must be set to 'peripheral'
> > > in order to avoid 'no USB device found' error,
> > > in usb_ether_init() function.
> > > 
> > > Signed-off-by: Julien Panis <jpanis@baylibre.com>
> > > ---
> > > Changes in v2:
> > > - Drop the modification made in arch/arm/mach-omap2/am33xx/board.c
> > > - Configure usb0 dr_mode as peripheral in 'am335x-icev2-u-boot.dtsi'
> > >    and 'am335x-evmsk-u-boot.dtsi' device trees.
> > > - Link to v1: https://lore.kernel.org/r/20230621-fix_usb_ether_init-v1-1-2156923994a9@baylibre.com
> > > 
> > > ---
> > > Julien Panis (2):
> > >        arm: dts: am335x-icev2-u-boot: Configure peripheral mode for usb0
> > >        arm: dts: am335x-evmsk-u-boot: Configure peripheral mode for usb0
> > > 
> > >   arch/arm/dts/am335x-evmsk-u-boot.dtsi | 4 ++++
> > >   arch/arm/dts/am335x-icev2-u-boot.dtsi | 4 ++++
> > >   2 files changed, 8 insertions(+)
> > I'll ask the first question that Nishanth might also ask, which is why
> > don't these belong in the kernel dts files?  Thanks!
> > 
> 
> That's a good question. :) Looping Nishanth...
> usb0 dr_mode property is already overlayed for am335x-evm,
> in 'am335x-evm-u-boot.dtsi'. So, it appeared more consistent
> to me to do the same thing for am335x-icev2 and am335x-evmsk.
> I guess that the goal is to configure usb0 as host by default at
> kernel boot, since we do not necessarily want to use this usb0
> as peripheral from userspace.
> Is it the right explanation @Vignesh @Nishanth ?

It's I think even more likely that the am335x_evm fragment needs to go
upstream too.

-- 
Tom

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Re: [PATCH v2 0/2] Fix 'no USB device found' error.

[Nishanth Menon]

On 13:59-20230623, Tom Rini wrote:
> On Fri, Jun 23, 2023 at 09:42:01AM +0200, Julien Panis wrote:
> > 
> > 
> > On 6/22/23 17:49, Tom Rini wrote:
> > > On Thu, Jun 22, 2023 at 04:34:34PM +0200, Julien Panis wrote:
> > > > This series fixes usb0 dr_mode for am335x-icev2
> > > > and am335x-evmsk. It must be set to 'peripheral'
> > > > in order to avoid 'no USB device found' error,
> > > > in usb_ether_init() function.
> > > > 
> > > > Signed-off-by: Julien Panis <jpanis@baylibre.com>
> > > > ---
> > > > Changes in v2:
> > > > - Drop the modification made in arch/arm/mach-omap2/am33xx/board.c
> > > > - Configure usb0 dr_mode as peripheral in 'am335x-icev2-u-boot.dtsi'
> > > >    and 'am335x-evmsk-u-boot.dtsi' device trees.
> > > > - Link to v1: https://lore.kernel.org/r/20230621-fix_usb_ether_init-v1-1-2156923994a9@baylibre.com
> > > > 
> > > > ---
> > > > Julien Panis (2):
> > > >        arm: dts: am335x-icev2-u-boot: Configure peripheral mode for usb0
> > > >        arm: dts: am335x-evmsk-u-boot: Configure peripheral mode for usb0
> > > > 
> > > >   arch/arm/dts/am335x-evmsk-u-boot.dtsi | 4 ++++
> > > >   arch/arm/dts/am335x-icev2-u-boot.dtsi | 4 ++++
> > > >   2 files changed, 8 insertions(+)
> > > I'll ask the first question that Nishanth might also ask, which is why
> > > don't these belong in the kernel dts files?  Thanks!
> > > 
> > 
> > That's a good question. :) Looping Nishanth...
> > usb0 dr_mode property is already overlayed for am335x-evm,
> > in 'am335x-evm-u-boot.dtsi'. So, it appeared more consistent
> > to me to do the same thing for am335x-icev2 and am335x-evmsk.
> > I guess that the goal is to configure usb0 as host by default at
> > kernel boot, since we do not necessarily want to use this usb0
> > as peripheral from userspace.
> > Is it the right explanation @Vignesh @Nishanth ?
> 
> It's I think even more likely that the am335x_evm fragment needs to go
> upstream too.
 
Adding Tony to the thread, but I think it is better to send the changes
to upstream kernel.

--
Regards
Nishanth Menon

Re: [PATCH v2 0/2] Fix 'no USB device found' error.

[Julien Panis]

On 6/26/23 09:32, Nishanth Menon wrote:
> On 13:59-20230623, Tom Rini wrote:
>> On Fri, Jun 23, 2023 at 09:42:01AM +0200, Julien Panis wrote:
>>>
>>> On 6/22/23 17:49, Tom Rini wrote:
>>>> On Thu, Jun 22, 2023 at 04:34:34PM +0200, Julien Panis wrote:
>>>>> This series fixes usb0 dr_mode for am335x-icev2
>>>>> and am335x-evmsk. It must be set to 'peripheral'
>>>>> in order to avoid 'no USB device found' error,
>>>>> in usb_ether_init() function.
>>>>>
>>>>> Signed-off-by: Julien Panis <jpanis@baylibre.com>
>>>>> ---
>>>>> Changes in v2:
>>>>> - Drop the modification made in arch/arm/mach-omap2/am33xx/board.c
>>>>> - Configure usb0 dr_mode as peripheral in 'am335x-icev2-u-boot.dtsi'
>>>>>     and 'am335x-evmsk-u-boot.dtsi' device trees.
>>>>> - Link to v1: https://lore.kernel.org/r/20230621-fix_usb_ether_init-v1-1-2156923994a9@baylibre.com
>>>>>
>>>>> ---
>>>>> Julien Panis (2):
>>>>>         arm: dts: am335x-icev2-u-boot: Configure peripheral mode for usb0
>>>>>         arm: dts: am335x-evmsk-u-boot: Configure peripheral mode for usb0
>>>>>
>>>>>    arch/arm/dts/am335x-evmsk-u-boot.dtsi | 4 ++++
>>>>>    arch/arm/dts/am335x-icev2-u-boot.dtsi | 4 ++++
>>>>>    2 files changed, 8 insertions(+)
>>>> I'll ask the first question that Nishanth might also ask, which is why
>>>> don't these belong in the kernel dts files?  Thanks!
>>>>
>>> That's a good question. :) Looping Nishanth...
>>> usb0 dr_mode property is already overlayed for am335x-evm,
>>> in 'am335x-evm-u-boot.dtsi'. So, it appeared more consistent
>>> to me to do the same thing for am335x-icev2 and am335x-evmsk.
>>> I guess that the goal is to configure usb0 as host by default at
>>> kernel boot, since we do not necessarily want to use this usb0
>>> as peripheral from userspace.
>>> Is it the right explanation @Vignesh @Nishanth ?
>> It's I think even more likely that the am335x_evm fragment needs to go
>> upstream too.
>   
> Adding Tony to the thread, but I think it is better to send the changes
> to upstream kernel.
>
> --
> Regards
> Nishanth Menon
OK, thanks.
So I will send a series to linux (usb0 configured as peripheral for the 3 boards).
Then, I will send a patch to remove usb0 node from 'am335x-evm-u-boot.dtsi'.

Julien Panis

Re: [PATCH v2 0/2] Fix 'no USB device found' error.

[Roger Quadros]

On 26/06/2023 10:32, Nishanth Menon wrote:
> On 13:59-20230623, Tom Rini wrote:
>> On Fri, Jun 23, 2023 at 09:42:01AM +0200, Julien Panis wrote:
>>>
>>>
>>> On 6/22/23 17:49, Tom Rini wrote:
>>>> On Thu, Jun 22, 2023 at 04:34:34PM +0200, Julien Panis wrote:
>>>>> This series fixes usb0 dr_mode for am335x-icev2
>>>>> and am335x-evmsk. It must be set to 'peripheral'
>>>>> in order to avoid 'no USB device found' error,
>>>>> in usb_ether_init() function.
>>>>>
>>>>> Signed-off-by: Julien Panis <jpanis@baylibre.com>
>>>>> ---
>>>>> Changes in v2:
>>>>> - Drop the modification made in arch/arm/mach-omap2/am33xx/board.c
>>>>> - Configure usb0 dr_mode as peripheral in 'am335x-icev2-u-boot.dtsi'
>>>>>    and 'am335x-evmsk-u-boot.dtsi' device trees.
>>>>> - Link to v1: https://lore.kernel.org/r/20230621-fix_usb_ether_init-v1-1-2156923994a9@baylibre.com
>>>>>
>>>>> ---
>>>>> Julien Panis (2):
>>>>>        arm: dts: am335x-icev2-u-boot: Configure peripheral mode for usb0
>>>>>        arm: dts: am335x-evmsk-u-boot: Configure peripheral mode for usb0
>>>>>
>>>>>   arch/arm/dts/am335x-evmsk-u-boot.dtsi | 4 ++++
>>>>>   arch/arm/dts/am335x-icev2-u-boot.dtsi | 4 ++++
>>>>>   2 files changed, 8 insertions(+)
>>>> I'll ask the first question that Nishanth might also ask, which is why
>>>> don't these belong in the kernel dts files?  Thanks!
>>>>
>>>
>>> That's a good question. :) Looping Nishanth...
>>> usb0 dr_mode property is already overlayed for am335x-evm,
>>> in 'am335x-evm-u-boot.dtsi'. So, it appeared more consistent
>>> to me to do the same thing for am335x-icev2 and am335x-evmsk.
>>> I guess that the goal is to configure usb0 as host by default at
>>> kernel boot, since we do not necessarily want to use this usb0
>>> as peripheral from userspace.
>>> Is it the right explanation @Vignesh @Nishanth ?
>>
>> It's I think even more likely that the am335x_evm fragment needs to go
>> upstream too.
>  
> Adding Tony to the thread, but I think it is better to send the changes
> to upstream kernel.
> 

Linux DT files are correct. USB0 is a dual-role port so it sets it to 'otg'.
u-boot doesn't support 'otg' so we need to override it to 'peripheral' in -u-boot.dtsi

-- 
cheers,
-roger

Re: [PATCH v2 0/2] Fix 'no USB device found' error.

[Tom Rini]

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On Mon, Jul 03, 2023 at 07:12:47PM +0300, Roger Quadros wrote:
> 
> 
> On 26/06/2023 10:32, Nishanth Menon wrote:
> > On 13:59-20230623, Tom Rini wrote:
> >> On Fri, Jun 23, 2023 at 09:42:01AM +0200, Julien Panis wrote:
> >>>
> >>>
> >>> On 6/22/23 17:49, Tom Rini wrote:
> >>>> On Thu, Jun 22, 2023 at 04:34:34PM +0200, Julien Panis wrote:
> >>>>> This series fixes usb0 dr_mode for am335x-icev2
> >>>>> and am335x-evmsk. It must be set to 'peripheral'
> >>>>> in order to avoid 'no USB device found' error,
> >>>>> in usb_ether_init() function.
> >>>>>
> >>>>> Signed-off-by: Julien Panis <jpanis@baylibre.com>
> >>>>> ---
> >>>>> Changes in v2:
> >>>>> - Drop the modification made in arch/arm/mach-omap2/am33xx/board.c
> >>>>> - Configure usb0 dr_mode as peripheral in 'am335x-icev2-u-boot.dtsi'
> >>>>>    and 'am335x-evmsk-u-boot.dtsi' device trees.
> >>>>> - Link to v1: https://lore.kernel.org/r/20230621-fix_usb_ether_init-v1-1-2156923994a9@baylibre.com
> >>>>>
> >>>>> ---
> >>>>> Julien Panis (2):
> >>>>>        arm: dts: am335x-icev2-u-boot: Configure peripheral mode for usb0
> >>>>>        arm: dts: am335x-evmsk-u-boot: Configure peripheral mode for usb0
> >>>>>
> >>>>>   arch/arm/dts/am335x-evmsk-u-boot.dtsi | 4 ++++
> >>>>>   arch/arm/dts/am335x-icev2-u-boot.dtsi | 4 ++++
> >>>>>   2 files changed, 8 insertions(+)
> >>>> I'll ask the first question that Nishanth might also ask, which is why
> >>>> don't these belong in the kernel dts files?  Thanks!
> >>>>
> >>>
> >>> That's a good question. :) Looping Nishanth...
> >>> usb0 dr_mode property is already overlayed for am335x-evm,
> >>> in 'am335x-evm-u-boot.dtsi'. So, it appeared more consistent
> >>> to me to do the same thing for am335x-icev2 and am335x-evmsk.
> >>> I guess that the goal is to configure usb0 as host by default at
> >>> kernel boot, since we do not necessarily want to use this usb0
> >>> as peripheral from userspace.
> >>> Is it the right explanation @Vignesh @Nishanth ?
> >>
> >> It's I think even more likely that the am335x_evm fragment needs to go
> >> upstream too.
> >  
> > Adding Tony to the thread, but I think it is better to send the changes
> > to upstream kernel.
> > 
> 
> Linux DT files are correct. USB0 is a dual-role port so it sets it to 'otg'.
> u-boot doesn't support 'otg' so we need to override it to 'peripheral' in -u-boot.dtsi

Ah, thanks, that was the missing bit of background information.

-- 
Tom

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Re: [PATCH v2 0/2] Fix 'no USB device found' error.

[Tony Lindgren]

* Tom Rini <trini@konsulko.com> [230703 16:22]:
> On Mon, Jul 03, 2023 at 07:12:47PM +0300, Roger Quadros wrote:
> > Linux DT files are correct. USB0 is a dual-role port so it sets it to 'otg'.
> > u-boot doesn't support 'otg' so we need to override it to 'peripheral' in -u-boot.dtsi
> 
> Ah, thanks, that was the missing bit of background information.

It would be best to parse dual-role feature in the driver to handle it as
peripheral only and keep the dts the same.

Regards,

Tony

Re: [PATCH v2 0/2] Fix 'no USB device found' error.

[Roger Quadros]

On 06/07/2023 06:53, Tony Lindgren wrote:
> * Tom Rini <trini@konsulko.com> [230703 16:22]:
>> On Mon, Jul 03, 2023 at 07:12:47PM +0300, Roger Quadros wrote:
>>> Linux DT files are correct. USB0 is a dual-role port so it sets it to 'otg'.
>>> u-boot doesn't support 'otg' so we need to override it to 'peripheral' in -u-boot.dtsi
>>
>> Ah, thanks, that was the missing bit of background information.
> 
> It would be best to parse dual-role feature in the driver to handle it as
> peripheral only and keep the dts the same.

+1

-- 
cheers,
-roger

Re: [PATCH v2 0/2] Fix 'no USB device found' error.

[Roger Quadros]

On 22/06/2023 17:34, Julien Panis wrote:
> This series fixes usb0 dr_mode for am335x-icev2
> and am335x-evmsk. It must be set to 'peripheral'
> in order to avoid 'no USB device found' error,
> in usb_ether_init() function.
> 
> Signed-off-by: Julien Panis <jpanis@baylibre.com>
> ---
> Changes in v2:
> - Drop the modification made in arch/arm/mach-omap2/am33xx/board.c
> - Configure usb0 dr_mode as peripheral in 'am335x-icev2-u-boot.dtsi'
>   and 'am335x-evmsk-u-boot.dtsi' device trees.
> - Link to v1: https://lore.kernel.org/r/20230621-fix_usb_ether_init-v1-1-2156923994a9@baylibre.com
> 
> ---
> Julien Panis (2):
>       arm: dts: am335x-icev2-u-boot: Configure peripheral mode for usb0
>       arm: dts: am335x-evmsk-u-boot: Configure peripheral mode for usb0
> 
>  arch/arm/dts/am335x-evmsk-u-boot.dtsi | 4 ++++
>  arch/arm/dts/am335x-icev2-u-boot.dtsi | 4 ++++
>  2 files changed, 8 insertions(+)

For this series:
Reviewed-by: Roger Quadros <rogerq@kernel.org>

-- 
cheers,
-roger