Re: Mini UART support for Raspberry Pi CM3 ?
Hello,
On 6/4/20 12:14 AM, j...@mobius-embedded-systems.co.uk wrote:
> Hi Ahmad
>
> I got a little further and although there's still no serial output on UART1,
> I at least now see an error message about it (on UART0 still).
>
> ns16550_serial 3f215040.ser...@7e215040.of: probe failed: Device or resource
> busy
Drivers request the MMIO region they want to work with. Try the iomem command
to see
if the EBUSY is due to a resource clash on 0x7e215040. Although I wonder how
that
came about. Normally, with device tree, this shouldn't happen unless the device
tree is faulty.
> So your point about setting CONSOLE_ACTIVATE_NONE was correct . Maybe I've
> missed something in the device trees, but am at least heartened to see
> something printed.
Can't take credit, because I don't know why this would cause an error message
to be
printed, when none was printed before.
Keep us posted.
Cheers
Ahmad
>
> Thanks
>
> John
>
> -Original Message-
> From: barebox On Behalf Of Ahmad Fatoum
> Sent: 02 June 2020 11:12
> To: j...@mobius-embedded-systems.co.uk
> ; barebox@lists.infradead.org
> Subject: Re: Mini UART support for Raspberry Pi CM3 ?
>
> On 6/2/20 11:57 AM, j...@mobius-embedded-systems.co.uk wrote:
>> Hi Ahmad
>>
>> I have been using v2020.05 but I believe I had enabled all consoles so
>> I'll try setting it to none and see how that goes.
>
> This will only fix the use of UART0 as output. To use UART1, you'll need to
> set stdout-path = like ab76f9d09d3b ("ARM: rpi: choose miniuart as
> stdout") does.
>
> Cheers
> Ahmad
>
>>
>> Thanks
>>
>> John
>>
>> -Original Message-
>> From: barebox On Behalf Of Ahmad
>> Fatoum
>> Sent: 02 June 2020 10:55
>> To: j...@mobius-embedded-systems.co.uk
>> ; barebox@lists.infradead.org
>> Subject: Re: Mini UART support for Raspberry Pi CM3 ?
>>
>> On 6/2/20 11:43 AM, Ahmad Fatoum wrote:
>>> On 6/2/20 11:14 AM, j...@mobius-embedded-systems.co.uk wrote:
>>>> Hi
>>>>
>>>> I have been trying to get the mini UART (UART1) to work in Barebox
>>>> on the RPI Compute Module 3+. I already have the changes made in
>>>> config.txt and this works fine when I boot into the main Linux code.
>>>> However, in Barebox, the output always comes out on the main UART
>>>> (UART0) and that is wired to the Bluetooth module on my platform. I
>>>> have
>> tried modifying the device
>>>> trees and cannot seem to get any output. I also ensured that I added
>> the
>>>> RPI CM3 output target as a config in rpi_defconfig.
>>>>
>>>> I've tried turning off the PL011 config option and also changing the
>>>> device tree to reference UART1 and set the chosen stdout-path to
>>>> point to this UART, but when I do this I just get a lack of any
>>>> serial
>> output.
>>>>
>>>> I am also wanting to use the alternate pins (32 & 33) for UART1, so
>>>> I am thinking that something else needs to be changed. Has anyone
>>>> managed to get this to work?
>>>
>>> Which barebox version are you on? v2020.03.0 contains a series for
>>> mini UART support culminating in ab76f9d09d3b ("ARM: rpi: choose
>>> miniuart as stdout"), which sounds like something you will want to have.
>>
>> Oh, I see now that this is in since v2019.03.0. I assume you are
>> already on a newer version?
>>
>>> Also what's you "Console activation strategy"? (Kconfig symbols
>>> CONSOLE_ACTIVATE_.*) You'll want to have CONSOLE_ACTIVATE_NONE, so
>>> only the stdout-path from the device tree is activated by default.
>>>
>>> Cheers
>>> Ahmad
>>>
>>>>
>>>> Regards
>>>>
>>>> John
>>>>
>>>>
>>>> ___
>>>> barebox mailing list
>>>> barebox@lists.infradead.org
>>>> http://lists.infradead.org/mailman/listinfo/barebox
>>>>
>>>
>>
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0|
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RE: Mini UART support for Raspberry Pi CM3 ?
Hi Ahmad
I got a little further and although there's still no serial output on UART1, I
at least now see an error message about it (on UART0 still).
ns16550_serial 3f215040.ser...@7e215040.of: probe failed: Device or resource
busy
So your point about setting CONSOLE_ACTIVATE_NONE was correct . Maybe I've
missed something in the device trees, but am at least heartened to see
something printed.
Thanks
John
-Original Message-
From: barebox On Behalf Of Ahmad Fatoum
Sent: 02 June 2020 11:12
To: j...@mobius-embedded-systems.co.uk ;
barebox@lists.infradead.org
Subject: Re: Mini UART support for Raspberry Pi CM3 ?
On 6/2/20 11:57 AM, j...@mobius-embedded-systems.co.uk wrote:
> Hi Ahmad
>
> I have been using v2020.05 but I believe I had enabled all consoles so
> I'll try setting it to none and see how that goes.
This will only fix the use of UART0 as output. To use UART1, you'll need to set
stdout-path = like ab76f9d09d3b ("ARM: rpi: choose miniuart as
stdout") does.
Cheers
Ahmad
>
> Thanks
>
> John
>
> -Original Message-
> From: barebox On Behalf Of Ahmad
> Fatoum
> Sent: 02 June 2020 10:55
> To: j...@mobius-embedded-systems.co.uk
> ; barebox@lists.infradead.org
> Subject: Re: Mini UART support for Raspberry Pi CM3 ?
>
> On 6/2/20 11:43 AM, Ahmad Fatoum wrote:
>> On 6/2/20 11:14 AM, j...@mobius-embedded-systems.co.uk wrote:
>>> Hi
>>>
>>> I have been trying to get the mini UART (UART1) to work in Barebox
>>> on the RPI Compute Module 3+. I already have the changes made in
>>> config.txt and this works fine when I boot into the main Linux code.
>>> However, in Barebox, the output always comes out on the main UART
>>> (UART0) and that is wired to the Bluetooth module on my platform. I
>>> have
> tried modifying the device
>>> trees and cannot seem to get any output. I also ensured that I added
> the
>>> RPI CM3 output target as a config in rpi_defconfig.
>>>
>>> I've tried turning off the PL011 config option and also changing the
>>> device tree to reference UART1 and set the chosen stdout-path to
>>> point to this UART, but when I do this I just get a lack of any
>>> serial
> output.
>>>
>>> I am also wanting to use the alternate pins (32 & 33) for UART1, so
>>> I am thinking that something else needs to be changed. Has anyone
>>> managed to get this to work?
>>
>> Which barebox version are you on? v2020.03.0 contains a series for
>> mini UART support culminating in ab76f9d09d3b ("ARM: rpi: choose
>> miniuart as stdout"), which sounds like something you will want to have.
>
> Oh, I see now that this is in since v2019.03.0. I assume you are
> already on a newer version?
>
>> Also what's you "Console activation strategy"? (Kconfig symbols
>> CONSOLE_ACTIVATE_.*) You'll want to have CONSOLE_ACTIVATE_NONE, so
>> only the stdout-path from the device tree is activated by default.
>>
>> Cheers
>> Ahmad
>>
>>>
>>> Regards
>>>
>>> John
>>>
>>>
>>> ___
>>> barebox mailing list
>>> barebox@lists.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/barebox
>>>
>>
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0|
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917- |
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Re: Mini UART support for Raspberry Pi CM3 ?
On 6/2/20 11:57 AM, j...@mobius-embedded-systems.co.uk wrote:
> Hi Ahmad
>
> I have been using v2020.05 but I believe I had enabled all consoles so I'll
> try setting it to none and see how that goes.
This will only fix the use of UART0 as output. To use UART1, you'll need
to set stdout-path = like ab76f9d09d3b ("ARM: rpi: choose miniuart as
stdout") does.
Cheers
Ahmad
>
> Thanks
>
> John
>
> -Original Message-
> From: barebox On Behalf Of Ahmad
> Fatoum
> Sent: 02 June 2020 10:55
> To: j...@mobius-embedded-systems.co.uk
> ; barebox@lists.infradead.org
> Subject: Re: Mini UART support for Raspberry Pi CM3 ?
>
> On 6/2/20 11:43 AM, Ahmad Fatoum wrote:
>> On 6/2/20 11:14 AM, j...@mobius-embedded-systems.co.uk wrote:
>>> Hi
>>>
>>> I have been trying to get the mini UART (UART1) to work in Barebox on
>>> the RPI Compute Module 3+. I already have the changes made in
>>> config.txt and this works fine when I boot into the main Linux code.
>>> However, in Barebox, the output always comes out on the main UART
>>> (UART0) and that is wired to the Bluetooth module on my platform. I have
> tried modifying the device
>>> trees and cannot seem to get any output. I also ensured that I added
> the
>>> RPI CM3 output target as a config in rpi_defconfig.
>>>
>>> I've tried turning off the PL011 config option and also changing the
>>> device tree to reference UART1 and set the chosen stdout-path to
>>> point to this UART, but when I do this I just get a lack of any serial
> output.
>>>
>>> I am also wanting to use the alternate pins (32 & 33) for UART1, so I
>>> am thinking that something else needs to be changed. Has anyone
>>> managed to get this to work?
>>
>> Which barebox version are you on? v2020.03.0 contains a series for
>> mini UART support culminating in ab76f9d09d3b ("ARM: rpi: choose
>> miniuart as stdout"), which sounds like something you will want to have.
>
> Oh, I see now that this is in since v2019.03.0. I assume you are already on
> a newer version?
>
>> Also what's you "Console activation strategy"? (Kconfig symbols
>> CONSOLE_ACTIVATE_.*) You'll want to have CONSOLE_ACTIVATE_NONE, so
>> only the stdout-path from the device tree is activated by default.
>>
>> Cheers
>> Ahmad
>>
>>>
>>> Regards
>>>
>>> John
>>>
>>>
>>> ___
>>> barebox mailing list
>>> barebox@lists.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/barebox
>>>
>>
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0|
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917- |
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RE: Mini UART support for Raspberry Pi CM3 ?
Hi Ahmad
I have been using v2020.05 but I believe I had enabled all consoles so I'll
try setting it to none and see how that goes.
Thanks
John
-Original Message-
From: barebox On Behalf Of Ahmad
Fatoum
Sent: 02 June 2020 10:55
To: j...@mobius-embedded-systems.co.uk
; barebox@lists.infradead.org
Subject: Re: Mini UART support for Raspberry Pi CM3 ?
On 6/2/20 11:43 AM, Ahmad Fatoum wrote:
> On 6/2/20 11:14 AM, j...@mobius-embedded-systems.co.uk wrote:
>> Hi
>>
>> I have been trying to get the mini UART (UART1) to work in Barebox on
>> the RPI Compute Module 3+. I already have the changes made in
>> config.txt and this works fine when I boot into the main Linux code.
>> However, in Barebox, the output always comes out on the main UART
>> (UART0) and that is wired to the Bluetooth module on my platform. I have
tried modifying the device
>> trees and cannot seem to get any output. I also ensured that I added
the
>> RPI CM3 output target as a config in rpi_defconfig.
>>
>> I've tried turning off the PL011 config option and also changing the
>> device tree to reference UART1 and set the chosen stdout-path to
>> point to this UART, but when I do this I just get a lack of any serial
output.
>>
>> I am also wanting to use the alternate pins (32 & 33) for UART1, so I
>> am thinking that something else needs to be changed. Has anyone
>> managed to get this to work?
>
> Which barebox version are you on? v2020.03.0 contains a series for
> mini UART support culminating in ab76f9d09d3b ("ARM: rpi: choose
> miniuart as stdout"), which sounds like something you will want to have.
Oh, I see now that this is in since v2019.03.0. I assume you are already on
a newer version?
> Also what's you "Console activation strategy"? (Kconfig symbols
> CONSOLE_ACTIVATE_.*) You'll want to have CONSOLE_ACTIVATE_NONE, so
> only the stdout-path from the device tree is activated by default.
>
> Cheers
> Ahmad
>
>>
>> Regards
>>
>> John
>>
>>
>> ___
>> barebox mailing list
>> barebox@lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/barebox
>>
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0|
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917- |
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Re: Mini UART support for Raspberry Pi CM3 ?
On 6/2/20 11:43 AM, Ahmad Fatoum wrote:
> On 6/2/20 11:14 AM, j...@mobius-embedded-systems.co.uk wrote:
>> Hi
>>
>> I have been trying to get the mini UART (UART1) to work in Barebox on the
>> RPI Compute Module 3+. I already have the changes made in config.txt and
>> this works fine when I boot into the main Linux code. However, in Barebox,
>> the output always comes out on the main UART (UART0) and that is wired to
>> the Bluetooth module on my platform. I have tried modifying the device
>> trees and cannot seem to get any output. I also ensured that I added the
>> RPI CM3 output target as a config in rpi_defconfig.
>>
>> I've tried turning off the PL011 config option and also changing the device
>> tree to reference UART1 and set the chosen stdout-path to point to this
>> UART, but when I do this I just get a lack of any serial output.
>>
>> I am also wanting to use the alternate pins (32 & 33) for UART1, so I am
>> thinking that something else needs to be changed. Has anyone managed to get
>> this to work?
>
> Which barebox version are you on? v2020.03.0 contains a series for mini UART
> support culminating in ab76f9d09d3b ("ARM: rpi: choose miniuart as stdout"),
> which sounds like something you will want to have.
Oh, I see now that this is in since v2019.03.0. I assume you are already
on a newer version?
> Also what's you "Console activation strategy"? (Kconfig symbols
> CONSOLE_ACTIVATE_.*) You'll want to have CONSOLE_ACTIVATE_NONE, so only
> the stdout-path from the device tree is activated by default.
>
> Cheers
> Ahmad
>
>>
>> Regards
>>
>> John
>>
>>
>> ___
>> barebox mailing list
>> barebox@lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/barebox
>>
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0|
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917- |
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Re: Mini UART support for Raspberry Pi CM3 ?
On 6/2/20 11:14 AM, j...@mobius-embedded-systems.co.uk wrote:
> Hi
>
> I have been trying to get the mini UART (UART1) to work in Barebox on the
> RPI Compute Module 3+. I already have the changes made in config.txt and
> this works fine when I boot into the main Linux code. However, in Barebox,
> the output always comes out on the main UART (UART0) and that is wired to
> the Bluetooth module on my platform. I have tried modifying the device
> trees and cannot seem to get any output. I also ensured that I added the
> RPI CM3 output target as a config in rpi_defconfig.
>
> I've tried turning off the PL011 config option and also changing the device
> tree to reference UART1 and set the chosen stdout-path to point to this
> UART, but when I do this I just get a lack of any serial output.
>
> I am also wanting to use the alternate pins (32 & 33) for UART1, so I am
> thinking that something else needs to be changed. Has anyone managed to get
> this to work?
Which barebox version are you on? v2020.03.0 contains a series for mini UART
support culminating in ab76f9d09d3b ("ARM: rpi: choose miniuart as stdout"),
which sounds like something you will want to have.
Also what's you "Console activation strategy"? (Kconfig symbols
CONSOLE_ACTIVATE_.*) You'll want to have CONSOLE_ACTIVATE_NONE, so only
the stdout-path from the device tree is activated by default.
Cheers
Ahmad
>
> Regards
>
> John
>
>
> ___
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
>
--
Pengutronix e.K. | |
Steuerwalder Str. 21 | http://www.pengutronix.de/ |
31137 Hildesheim, Germany | Phone: +49-5121-206917-0|
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917- |
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