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Groups > linux.kernel > #1621078 > unrolled thread

[PATCH] fpga: allow to compile-test Altera FPGA bridge drivers

Started byTobias Klauser <tklauser@distanz.ch>
First post2017-04-11 11:30 +0200
Last post2017-04-12 09:00 +0200
Articles 5 — 2 participants

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  [PATCH] fpga: allow to compile-test Altera FPGA bridge drivers Tobias Klauser <tklauser@distanz.ch> - 2017-04-11 11:30 +0200
    Re: [PATCH] fpga: allow to compile-test Altera FPGA bridge drivers Alan Tull <atull@kernel.org> - 2017-04-11 16:30 +0200
      Re: [PATCH] fpga: allow to compile-test Altera FPGA bridge drivers Tobias Klauser <tklauser@distanz.ch> - 2017-04-11 16:40 +0200
        Re: [PATCH] fpga: allow to compile-test Altera FPGA bridge drivers Alan Tull <atull@kernel.org> - 2017-04-11 17:30 +0200
          Re: [PATCH] fpga: allow to compile-test Altera FPGA bridge drivers Tobias Klauser <tklauser@distanz.ch> - 2017-04-12 09:00 +0200

#1621078 — [PATCH] fpga: allow to compile-test Altera FPGA bridge drivers

FromTobias Klauser <tklauser@distanz.ch>
Date2017-04-11 11:30 +0200
Subject[PATCH] fpga: allow to compile-test Altera FPGA bridge drivers
Message-ID<tv0hA-543-23@gated-at.bofh.it>
Add COMPILE_TEST to the Kconfig entries for the Altera SoCFPGA FPGA
Bridge and the Altera FPGA Freeze Bridge drivers to allow test-compiling
them on other architectures.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
---
 drivers/fpga/Kconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
index 161ba9dccede..38ab05d261bf 100644
--- a/drivers/fpga/Kconfig
+++ b/drivers/fpga/Kconfig
@@ -69,14 +69,14 @@ config FPGA_BRIDGE
 
 config SOCFPGA_FPGA_BRIDGE
 	tristate "Altera SoCFPGA FPGA Bridges"
-	depends on ARCH_SOCFPGA && FPGA_BRIDGE
+	depends on (ARCH_SOCFPGA || COMPILE_TEST) && FPGA_BRIDGE
 	help
 	  Say Y to enable drivers for FPGA bridges for Altera SOCFPGA
 	  devices.
 
 config ALTERA_FREEZE_BRIDGE
 	tristate "Altera FPGA Freeze Bridge"
-	depends on ARCH_SOCFPGA && FPGA_BRIDGE
+	depends on (ARCH_SOCFPGA || COMPILE_TEST) && FPGA_BRIDGE
 	help
 	  Say Y to enable drivers for Altera FPGA Freeze bridges.  A
 	  freeze bridge is a bridge that exists in the FPGA fabric to
-- 
2.12.2

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#1621355

FromAlan Tull <atull@kernel.org>
Date2017-04-11 16:30 +0200
Message-ID<tv4XV-8aE-37@gated-at.bofh.it>
In reply to#1621078
On Tue, Apr 11, 2017 at 4:22 AM, Tobias Klauser <tklauser@distanz.ch> wrote:

Hi Tobias,

Thanks for your fixes that you have been sending.  I disagree with
this particular one (see below), but I appreciate your efforts.

> Add COMPILE_TEST to the Kconfig entries for the Altera SoCFPGA FPGA
> Bridge and the Altera FPGA Freeze Bridge drivers to allow test-compiling
> them on other architectures.
>
> Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
> ---
>  drivers/fpga/Kconfig | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
> index 161ba9dccede..38ab05d261bf 100644
> --- a/drivers/fpga/Kconfig
> +++ b/drivers/fpga/Kconfig
> @@ -69,14 +69,14 @@ config FPGA_BRIDGE
>
>  config SOCFPGA_FPGA_BRIDGE
>         tristate "Altera SoCFPGA FPGA Bridges"
> -       depends on ARCH_SOCFPGA && FPGA_BRIDGE
> +       depends on (ARCH_SOCFPGA || COMPILE_TEST) && FPGA_BRIDGE

It doesn't make sense to compile test these on other arch's.
The bridges enabled by this only appear on Cyclone 5 SoCFPGA parts.

>         help
>           Say Y to enable drivers for FPGA bridges for Altera SOCFPGA
>           devices.
>
>  config ALTERA_FREEZE_BRIDGE
>         tristate "Altera FPGA Freeze Bridge"
> -       depends on ARCH_SOCFPGA && FPGA_BRIDGE
> +       depends on (ARCH_SOCFPGA || COMPILE_TEST) && FPGA_BRIDGE

These bridges can be used on Altera PCIe FPGA's.  So this shouldn't
have been dependent on ARCH_SOCFPGA in the first place.

Alan

>         help
>           Say Y to enable drivers for Altera FPGA Freeze bridges.  A
>           freeze bridge is a bridge that exists in the FPGA fabric to
> --
> 2.12.2
>
>

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#1621373

FromTobias Klauser <tklauser@distanz.ch>
Date2017-04-11 16:40 +0200
Message-ID<tv57B-8eV-63@gated-at.bofh.it>
In reply to#1621355
Hi Alan,

On 2017-04-11 at 16:27:03 +0200, Alan Tull <atull@kernel.org> wrote:
> On Tue, Apr 11, 2017 at 4:22 AM, Tobias Klauser <tklauser@distanz.ch> wrote:
> 
> Hi Tobias,
> 
> Thanks for your fixes that you have been sending.  I disagree with
> this particular one (see below), but I appreciate your efforts.

Thanks for your feedback on the patch.

> > Add COMPILE_TEST to the Kconfig entries for the Altera SoCFPGA FPGA
> > Bridge and the Altera FPGA Freeze Bridge drivers to allow test-compiling
> > them on other architectures.
> >
> > Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
> > ---
> >  drivers/fpga/Kconfig | 4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
> > index 161ba9dccede..38ab05d261bf 100644
> > --- a/drivers/fpga/Kconfig
> > +++ b/drivers/fpga/Kconfig
> > @@ -69,14 +69,14 @@ config FPGA_BRIDGE
> >
> >  config SOCFPGA_FPGA_BRIDGE
> >         tristate "Altera SoCFPGA FPGA Bridges"
> > -       depends on ARCH_SOCFPGA && FPGA_BRIDGE
> > +       depends on (ARCH_SOCFPGA || COMPILE_TEST) && FPGA_BRIDGE
> 
> It doesn't make sense to compile test these on other arch's.
> The bridges enabled by this only appear on Cyclone 5 SoCFPGA parts.

There are many drivers in the tree where this is the case (i.e. the
driver is compiled on an arch where the corresponding hardware is not
available). Still it could be benefitial IMO in order to catch compiler
errors and warnings, e.g. due to API/header changes earlier on. I
occasionally found this quite handy for janitorial/cleanup patches where
I didn't have the corresponding cross-compiler/hardware.

In any case, I don't feel strongly about this. So feel free to drop at
your discretion.

> >         help
> >           Say Y to enable drivers for FPGA bridges for Altera SOCFPGA
> >           devices.
> >
> >  config ALTERA_FREEZE_BRIDGE
> >         tristate "Altera FPGA Freeze Bridge"
> > -       depends on ARCH_SOCFPGA && FPGA_BRIDGE
> > +       depends on (ARCH_SOCFPGA || COMPILE_TEST) && FPGA_BRIDGE
> 
> These bridges can be used on Altera PCIe FPGA's.  So this shouldn't
> have been dependent on ARCH_SOCFPGA in the first place.

Ok. So the dependency on ARCH_SOCFPGA should be dropped altogether? I
can send an updated patch if you want.

> Alan
> 
> >         help
> >           Say Y to enable drivers for Altera FPGA Freeze bridges.  A
> >           freeze bridge is a bridge that exists in the FPGA fabric to
> > --
> > 2.12.2
> >
> >
> 

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#1621410

FromAlan Tull <atull@kernel.org>
Date2017-04-11 17:30 +0200
Message-ID<tv5TY-km-21@gated-at.bofh.it>
In reply to#1621373
On Tue, Apr 11, 2017 at 9:35 AM, Tobias Klauser <tklauser@distanz.ch> wrote:
> Hi Alan,
>
> On 2017-04-11 at 16:27:03 +0200, Alan Tull <atull@kernel.org> wrote:
>> On Tue, Apr 11, 2017 at 4:22 AM, Tobias Klauser <tklauser@distanz.ch> wrote:
>>
>> Hi Tobias,
>>
>> Thanks for your fixes that you have been sending.  I disagree with
>> this particular one (see below), but I appreciate your efforts.
>
> Thanks for your feedback on the patch.
>
>> > Add COMPILE_TEST to the Kconfig entries for the Altera SoCFPGA FPGA
>> > Bridge and the Altera FPGA Freeze Bridge drivers to allow test-compiling
>> > them on other architectures.
>> >
>> > Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
>> > ---
>> >  drivers/fpga/Kconfig | 4 ++--
>> >  1 file changed, 2 insertions(+), 2 deletions(-)
>> >
>> > diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
>> > index 161ba9dccede..38ab05d261bf 100644
>> > --- a/drivers/fpga/Kconfig
>> > +++ b/drivers/fpga/Kconfig
>> > @@ -69,14 +69,14 @@ config FPGA_BRIDGE
>> >
>> >  config SOCFPGA_FPGA_BRIDGE
>> >         tristate "Altera SoCFPGA FPGA Bridges"
>> > -       depends on ARCH_SOCFPGA && FPGA_BRIDGE
>> > +       depends on (ARCH_SOCFPGA || COMPILE_TEST) && FPGA_BRIDGE
>>
>> It doesn't make sense to compile test these on other arch's.
>> The bridges enabled by this only appear on Cyclone 5 SoCFPGA parts.
>
> There are many drivers in the tree where this is the case (i.e. the
> driver is compiled on an arch where the corresponding hardware is not
> available). Still it could be benefitial IMO in order to catch compiler
> errors and warnings, e.g. due to API/header changes earlier on. I
> occasionally found this quite handy for janitorial/cleanup patches where
> I didn't have the corresponding cross-compiler/hardware.

That sounds good and useful.

>
> In any case, I don't feel strongly about this. So feel free to drop at
> your discretion.
>
>> >         help
>> >           Say Y to enable drivers for FPGA bridges for Altera SOCFPGA
>> >           devices.
>> >
>> >  config ALTERA_FREEZE_BRIDGE
>> >         tristate "Altera FPGA Freeze Bridge"
>> > -       depends on ARCH_SOCFPGA && FPGA_BRIDGE
>> > +       depends on (ARCH_SOCFPGA || COMPILE_TEST) && FPGA_BRIDGE
>>
>> These bridges can be used on Altera PCIe FPGA's.  So this shouldn't
>> have been dependent on ARCH_SOCFPGA in the first place.
>
> Ok. So the dependency on ARCH_SOCFPGA should be dropped altogether? I
> can send an updated patch if you want.

Yes please.

Thanks!
ALan

>
>> Alan
>>
>> >         help
>> >           Say Y to enable drivers for Altera FPGA Freeze bridges.  A
>> >           freeze bridge is a bridge that exists in the FPGA fabric to
>> > --
>> > 2.12.2
>> >
>> >
>>

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#1621848

FromTobias Klauser <tklauser@distanz.ch>
Date2017-04-12 09:00 +0200
Message-ID<tvkpX-1dW-5@gated-at.bofh.it>
In reply to#1621410
On 2017-04-11 at 17:21:19 +0200, Alan Tull <atull@kernel.org> wrote:
> On Tue, Apr 11, 2017 at 9:35 AM, Tobias Klauser <tklauser@distanz.ch> wrote:
> > Hi Alan,
> >
> > On 2017-04-11 at 16:27:03 +0200, Alan Tull <atull@kernel.org> wrote:
> >> On Tue, Apr 11, 2017 at 4:22 AM, Tobias Klauser <tklauser@distanz.ch> wrote:
> >>
> >> Hi Tobias,
> >>
> >> Thanks for your fixes that you have been sending.  I disagree with
> >> this particular one (see below), but I appreciate your efforts.
> >
> > Thanks for your feedback on the patch.
> >
> >> > Add COMPILE_TEST to the Kconfig entries for the Altera SoCFPGA FPGA
> >> > Bridge and the Altera FPGA Freeze Bridge drivers to allow test-compiling
> >> > them on other architectures.
> >> >
> >> > Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
> >> > ---
> >> >  drivers/fpga/Kconfig | 4 ++--
> >> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >> >
> >> > diff --git a/drivers/fpga/Kconfig b/drivers/fpga/Kconfig
> >> > index 161ba9dccede..38ab05d261bf 100644
> >> > --- a/drivers/fpga/Kconfig
> >> > +++ b/drivers/fpga/Kconfig
> >> > @@ -69,14 +69,14 @@ config FPGA_BRIDGE
> >> >
> >> >  config SOCFPGA_FPGA_BRIDGE
> >> >         tristate "Altera SoCFPGA FPGA Bridges"
> >> > -       depends on ARCH_SOCFPGA && FPGA_BRIDGE
> >> > +       depends on (ARCH_SOCFPGA || COMPILE_TEST) && FPGA_BRIDGE
> >>
> >> It doesn't make sense to compile test these on other arch's.
> >> The bridges enabled by this only appear on Cyclone 5 SoCFPGA parts.
> >
> > There are many drivers in the tree where this is the case (i.e. the
> > driver is compiled on an arch where the corresponding hardware is not
> > available). Still it could be benefitial IMO in order to catch compiler
> > errors and warnings, e.g. due to API/header changes earlier on. I
> > occasionally found this quite handy for janitorial/cleanup patches where
> > I didn't have the corresponding cross-compiler/hardware.
> 
> That sounds good and useful.
> 
> >
> > In any case, I don't feel strongly about this. So feel free to drop at
> > your discretion.
> >
> >> >         help
> >> >           Say Y to enable drivers for FPGA bridges for Altera SOCFPGA
> >> >           devices.
> >> >
> >> >  config ALTERA_FREEZE_BRIDGE
> >> >         tristate "Altera FPGA Freeze Bridge"
> >> > -       depends on ARCH_SOCFPGA && FPGA_BRIDGE
> >> > +       depends on (ARCH_SOCFPGA || COMPILE_TEST) && FPGA_BRIDGE
> >>
> >> These bridges can be used on Altera PCIe FPGA's.  So this shouldn't
> >> have been dependent on ARCH_SOCFPGA in the first place.
> >
> > Ok. So the dependency on ARCH_SOCFPGA should be dropped altogether? I
> > can send an updated patch if you want.
> 
> Yes please.

Thanks, I'll send a v2.

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