[PATCH] ARM: debug: enable UART1 for socfpga Cyclone5

[PATCH] ARM: debug: enable UART1 for socfpga Cyclone5

[Clément Péron]

Cyclone5 and Arria10 doesn't have the same memory map for UART1.

Split the SOCFPGA_UART1 into 2 options to allow debugging on UART1 for Cylone5.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 arch/arm/Kconfig.debug | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index f6fcb8a79889..25ebdcefe403 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -1079,14 +1079,21 @@ choice
 		  Say Y here if you want kernel low-level debugging support
 		  on SOCFPGA(Cyclone 5 and Arria 5) based platforms.
 
-	config DEBUG_SOCFPGA_UART1
+	config DEBUG_SOCFPGA_ARRIA10_UART1
 		depends on ARCH_SOCFPGA
-		bool "Use SOCFPGA UART1 for low-level debug"
+		bool "Use SOCFPGA Arria10 UART1 for low-level debug"
 		select DEBUG_UART_8250
 		help
 		  Say Y here if you want kernel low-level debugging support
 		  on SOCFPGA(Arria 10) based platforms.
 
+	config DEBUG_SOCFPGA_CYCLONE5_UART1
+		depends on ARCH_SOCFPGA
+		bool "Use SOCFPGA Cyclone 5 UART1 for low-level debug"
+		select DEBUG_UART_8250
+		help
+		  Say Y here if you want kernel low-level debugging support
+		  on SOCFPGA(Cyclone 5 and Arria 5) based platforms.
 
 	config DEBUG_SUN9I_UART0
 		bool "Kernel low-level debugging messages via sun9i UART0"
@@ -1647,7 +1654,8 @@ config DEBUG_UART_PHYS
 	default 0xfe800000 if ARCH_IOP32X
 	default 0xff690000 if DEBUG_RK32_UART2
 	default 0xffc02000 if DEBUG_SOCFPGA_UART0
-	default 0xffc02100 if DEBUG_SOCFPGA_UART1
+	default 0xffc02100 if DEBUG_SOCFPGA_ARRIA10_UART1
+	default 0xffc03000 if DEBUG_SOCFPGA_CYCLONE5_UART1
 	default 0xffd82340 if ARCH_IOP13XX
 	default 0xffe40000 if DEBUG_RCAR_GEN1_SCIF0
 	default 0xffe42000 if DEBUG_RCAR_GEN1_SCIF2
@@ -1754,7 +1762,8 @@ config DEBUG_UART_VIRT
 	default 0xfeb30c00 if DEBUG_KEYSTONE_UART0
 	default 0xfeb31000 if DEBUG_KEYSTONE_UART1
 	default 0xfec02000 if DEBUG_SOCFPGA_UART0
-	default 0xfec02100 if DEBUG_SOCFPGA_UART1
+	default 0xfec02100 if DEBUG_SOCFPGA_ARRIA10_UART1
+	default 0xfec03000 if DEBUG_SOCFPGA_CYCLONE5_UART1
 	default 0xfec12000 if (DEBUG_MVEBU_UART0 || DEBUG_MVEBU_UART0_ALTERNATE) && ARCH_MVEBU
 	default 0xfec12100 if DEBUG_MVEBU_UART1_ALTERNATE
 	default 0xfec10000 if DEBUG_SIRFATLAS7_UART0
@@ -1803,9 +1812,9 @@ config DEBUG_UART_8250_WORD
 	depends on DEBUG_LL_UART_8250 || DEBUG_UART_8250
 	depends on DEBUG_UART_8250_SHIFT >= 2
 	default y if DEBUG_PICOXCELL_UART || \
-		DEBUG_SOCFPGA_UART0 || DEBUG_SOCFPGA_UART1 || \
-		DEBUG_KEYSTONE_UART0 || DEBUG_KEYSTONE_UART1 || \
-		DEBUG_ALPINE_UART0 || \
+		DEBUG_SOCFPGA_UART0 || DEBUG_SOCFPGA_ARRIA10_UART1 || \
+		DEBUG_SOCFPGA_CYCLONE5_UART1 || DEBUG_KEYSTONE_UART0 || \
+		DEBUG_KEYSTONE_UART1 || DEBUG_ALPINE_UART0 || \
 		DEBUG_DAVINCI_DMx_UART0 || DEBUG_DAVINCI_DA8XX_UART1 || \
 		DEBUG_DAVINCI_DA8XX_UART2 || DEBUG_BCM_IPROC_UART3 || \
 		DEBUG_BCM_KONA_UART || DEBUG_RK32_UART2
-- 
2.17.1

Re: [PATCH] ARM: debug: enable UART1 for socfpga Cyclone5

[Dinh Nguyen]

Hi Clément,

On 10/09/2018 06:28 AM, Clément Péron wrote:
> Cyclone5 and Arria10 doesn't have the same memory map for UART1.
> 
> Split the SOCFPGA_UART1 into 2 options to allow debugging on UART1 for Cylone5.
> 

I'm not sure the need for this patch. Are there any cyclone5 based
boards that has UART1 as the debug uart? I see that all of them are
using UART0.

Dinh

Re: [PATCH] ARM: debug: enable UART1 for socfpga Cyclone5

[Clément Péron]

HI Dinh,

On Tue, 23 Oct 2018 at 16:04, Dinh Nguyen <dinguyen@kernel.org> wrote:
>
> Hi Clément,
>
> On 10/09/2018 06:28 AM, Clément Péron wrote:
> > Cyclone5 and Arria10 doesn't have the same memory map for UART1.
> >
> > Split the SOCFPGA_UART1 into 2 options to allow debugging on UART1 for Cylone5.
> >
>
> I'm not sure the need for this patch. Are there any cyclone5 based
> boards that has UART1 as the debug uart? I see that all of them are
> using UART0.

There is no upstream device with this UART used. But the board I have
use it, and there is no limitation to not have it available upstream
no ?

Thanks,
Clement

>
> Dinh
>

Re: [PATCH] ARM: debug: enable UART1 for socfpga Cyclone5

[Dinh Nguyen]

On 10/23/2018 09:44 AM, Clément Péron wrote:
> HI Dinh,
> 
> On Tue, 23 Oct 2018 at 16:04, Dinh Nguyen <dinguyen@kernel.org> wrote:
>>
>> Hi Clément,
>>
>> On 10/09/2018 06:28 AM, Clément Péron wrote:
>>> Cyclone5 and Arria10 doesn't have the same memory map for UART1.
>>>
>>> Split the SOCFPGA_UART1 into 2 options to allow debugging on UART1 for Cylone5.
>>>
>>
>> I'm not sure the need for this patch. Are there any cyclone5 based
>> boards that has UART1 as the debug uart? I see that all of them are
>> using UART0.
> 
> There is no upstream device with this UART used. But the board I have
> use it, and there is no limitation to not have it available upstream
> no ?
> 

I see. Then I don't think the patch is applicable because none of the
upstream devices need it. Now, if you were to upstream your board that
uses UART1, then there will be a case for this patch. Do you agree?

Dinh

Re: [PATCH] ARM: debug: enable UART1 for socfpga Cyclone5

[Uwe Kleine-König]

On Tue, Oct 23, 2018 at 03:35:31PM -0500, Dinh Nguyen wrote:
> 
> 
> On 10/23/2018 09:44 AM, Clément Péron wrote:
> > HI Dinh,
> > 
> > On Tue, 23 Oct 2018 at 16:04, Dinh Nguyen <dinguyen@kernel.org> wrote:
> >>
> >> Hi Clément,
> >>
> >> On 10/09/2018 06:28 AM, Clément Péron wrote:
> >>> Cyclone5 and Arria10 doesn't have the same memory map for UART1.
> >>>
> >>> Split the SOCFPGA_UART1 into 2 options to allow debugging on UART1 for Cylone5.
> >>>
> >>
> >> I'm not sure the need for this patch. Are there any cyclone5 based
> >> boards that has UART1 as the debug uart? I see that all of them are
> >> using UART0.
> > 
> > There is no upstream device with this UART used. But the board I have
> > use it, and there is no limitation to not have it available upstream
> > no ?
> > 
> 
> I see. Then I don't think the patch is applicable because none of the
> upstream devices need it. Now, if you were to upstream your board that
> uses UART1, then there will be a case for this patch. Do you agree?

I'd not say having to upstream the board is a sensible precondition for
such a patch. One of the arguments for moving ARM to dt was that this
allows to separate the machine specifics from the code. So I'd say if
Clément has a need, this is a good enough reason to take this patch.

Just my 0.02 €,
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

Re: [PATCH] ARM: debug: enable UART1 for socfpga Cyclone5

[Clément Péron]

Hi,

On Wed, 24 Oct 2018 at 08:51, Uwe Kleine-König
<u.kleine-koenig@pengutronix.de> wrote:
>
> On Tue, Oct 23, 2018 at 03:35:31PM -0500, Dinh Nguyen wrote:
> >
> >
> > On 10/23/2018 09:44 AM, Clément Péron wrote:
> > > HI Dinh,
> > >
> > > On Tue, 23 Oct 2018 at 16:04, Dinh Nguyen <dinguyen@kernel.org> wrote:
> > >>
> > >> Hi Clément,
> > >>
> > >> On 10/09/2018 06:28 AM, Clément Péron wrote:
> > >>> Cyclone5 and Arria10 doesn't have the same memory map for UART1.
> > >>>
> > >>> Split the SOCFPGA_UART1 into 2 options to allow debugging on UART1 for Cylone5.
> > >>>
> > >>
> > >> I'm not sure the need for this patch. Are there any cyclone5 based
> > >> boards that has UART1 as the debug uart? I see that all of them are
> > >> using UART0.
> > >
> > > There is no upstream device with this UART used. But the board I have
> > > use it, and there is no limitation to not have it available upstream
> > > no ?
> > >
> >
> > I see. Then I don't think the patch is applicable because none of the
> > upstream devices need it. Now, if you were to upstream your board that
> > uses UART1, then there will be a case for this patch. Do you agree?

I don't think my board is upstreamable it's not a devkit and not
really interesting for the community.

It's really a trivial patch and it will avoid wasting time  to another
owner of CycloneV board who would like to have debug on UART1

Thanks
Clement

>
> I'd not say having to upstream the board is a sensible precondition for
> such a patch. One of the arguments for moving ARM to dt was that this
> allows to separate the machine specifics from the code. So I'd say if
> Clément has a need, this is a good enough reason to take this patch.
>
> Just my 0.02 €,
> Uwe
>
> --
> Pengutronix e.K.                           | Uwe Kleine-König            |
> Industrial Linux Solutions                 | http://www.pengutronix.de/  |

Re: [PATCH] ARM: debug: enable UART1 for socfpga Cyclone5

[Dinh Nguyen]

Hi

On 10/24/2018 09:11 AM, Clément Péron wrote:
> Hi,
> 
> On Wed, 24 Oct 2018 at 08:51, Uwe Kleine-König
> <u.kleine-koenig@pengutronix.de> wrote:
>>
>> On Tue, Oct 23, 2018 at 03:35:31PM -0500, Dinh Nguyen wrote:
>>>
>>>
>>> On 10/23/2018 09:44 AM, Clément Péron wrote:
>>>> HI Dinh,
>>>>
>>>> On Tue, 23 Oct 2018 at 16:04, Dinh Nguyen <dinguyen@kernel.org> wrote:
>>>>>
>>>>> Hi Clément,
>>>>>
>>>>> On 10/09/2018 06:28 AM, Clément Péron wrote:
>>>>>> Cyclone5 and Arria10 doesn't have the same memory map for UART1.
>>>>>>
>>>>>> Split the SOCFPGA_UART1 into 2 options to allow debugging on UART1 for Cylone5.
>>>>>>
>>>>>
>>>>> I'm not sure the need for this patch. Are there any cyclone5 based
>>>>> boards that has UART1 as the debug uart? I see that all of them are
>>>>> using UART0.
>>>>
>>>> There is no upstream device with this UART used. But the board I have
>>>> use it, and there is no limitation to not have it available upstream
>>>> no ?
>>>>
>>>
>>> I see. Then I don't think the patch is applicable because none of the
>>> upstream devices need it. Now, if you were to upstream your board that
>>> uses UART1, then there will be a case for this patch. Do you agree?
> 
> I don't think my board is upstreamable it's not a devkit and not
> really interesting for the community.
> 
> It's really a trivial patch and it will avoid wasting time  to another
> owner of CycloneV board who would like to have debug on UART1
> 

I'll apply this after the merge window.

Thanks,
Dinh