* [PATCH] ARM: imx: fix i.MX35 CPU architecture
@ 2012-06-27 20:28 Benoît Thébaudeau
2012-06-28 10:57 ` Sascha Hauer
0 siblings, 1 reply; 4+ messages in thread
From: Benoît Thébaudeau @ 2012-06-27 20:28 UTC (permalink / raw)
To: linux-arm-kernel
The data sheet of the i.MX35 says it is an ARM1136JF-S processor, version r1p3,
which, according to section "B.1. New instructions" of the ARM1136JF-S and
ARM1136J-S Technical Reference Manual, makes the i.MX35 CPU architecture not
only ARMv6, but ARMv6k.
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: <linux-arm-kernel@lists.infradead.org>
Signed-off-by: Beno?t Th?baudeau <benoit.thebaudeau@advansee.com>
---
.../arch/arm/mach-imx/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git linux-next-HEAD-49289f3.orig/arch/arm/mach-imx/Kconfig linux-next-HEAD-49289f3/arch/arm/mach-imx/Kconfig
index eff4db5..0345e85 100644
--- linux-next-HEAD-49289f3.orig/arch/arm/mach-imx/Kconfig
+++ linux-next-HEAD-49289f3/arch/arm/mach-imx/Kconfig
@@ -73,7 +73,7 @@ config SOC_IMX31
config SOC_IMX35
bool
- select CPU_V6
+ select CPU_V6K
select ARCH_MXC_IOMUX_V3
select COMMON_CLK
select HAVE_EPIT
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH] ARM: imx: fix i.MX35 CPU architecture
2012-06-27 20:28 [PATCH] ARM: imx: fix i.MX35 CPU architecture Benoît Thébaudeau
@ 2012-06-28 10:57 ` Sascha Hauer
2012-06-28 15:08 ` Benoît Thébaudeau
0 siblings, 1 reply; 4+ messages in thread
From: Sascha Hauer @ 2012-06-28 10:57 UTC (permalink / raw)
To: linux-arm-kernel
On Wed, Jun 27, 2012 at 10:28:26PM +0200, Beno?t Th?baudeau wrote:
> The data sheet of the i.MX35 says it is an ARM1136JF-S processor, version r1p3,
> which, according to section "B.1. New instructions" of the ARM1136JF-S and
> ARM1136J-S Technical Reference Manual, makes the i.MX35 CPU architecture not
> only ARMv6, but ARMv6k.
Is this true for i.MX31 aswell? If not, we would have to add additional
magic to enable CPU_V6K only when SOC_IMX31 is not selected.
Sascha
>
> Cc: Sascha Hauer <kernel@pengutronix.de>
> Cc: <linux-arm-kernel@lists.infradead.org>
> Signed-off-by: Beno?t Th?baudeau <benoit.thebaudeau@advansee.com>
> ---
> .../arch/arm/mach-imx/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git linux-next-HEAD-49289f3.orig/arch/arm/mach-imx/Kconfig linux-next-HEAD-49289f3/arch/arm/mach-imx/Kconfig
> index eff4db5..0345e85 100644
> --- linux-next-HEAD-49289f3.orig/arch/arm/mach-imx/Kconfig
> +++ linux-next-HEAD-49289f3/arch/arm/mach-imx/Kconfig
> @@ -73,7 +73,7 @@ config SOC_IMX31
>
> config SOC_IMX35
> bool
> - select CPU_V6
> + select CPU_V6K
> select ARCH_MXC_IOMUX_V3
> select COMMON_CLK
> select HAVE_EPIT
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] ARM: imx: fix i.MX35 CPU architecture
2012-06-28 10:57 ` Sascha Hauer
@ 2012-06-28 15:08 ` Benoît Thébaudeau
2012-06-29 9:15 ` Sascha Hauer
0 siblings, 1 reply; 4+ messages in thread
From: Benoît Thébaudeau @ 2012-06-28 15:08 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, Jun 28, 2012 at 12:57:20PM +0200, Sascha Hauer wrote:
> On Wed, Jun 27, 2012 at 10:28:26PM +0200, Beno?t Th?baudeau wrote:
> > The data sheet of the i.MX35 says it is an ARM1136JF-S processor,
> > version r1p3,
> > which, according to section "B.1. New instructions" of the
> > ARM1136JF-S and
> > ARM1136J-S Technical Reference Manual, makes the i.MX35 CPU
> > architecture not
> > only ARMv6, but ARMv6k.
>
> Is this true for i.MX31 aswell?
No.
> If not, we would have to add
> additional
> magic to enable CPU_V6K only when SOC_IMX31 is not selected.
Why? That could be "select CPU_V6K if !SOC_IMX31", but e.g. CPU_V7 is selected
by SOC_IMX5 whether or not SOC_IMX31 or SOC_IMX35 is selected, and CPU_V6/6K/7
conflicts are handled with priorities by the ARM infrastructure.
Regards,
Beno?t
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] ARM: imx: fix i.MX35 CPU architecture
2012-06-28 15:08 ` Benoît Thébaudeau
@ 2012-06-29 9:15 ` Sascha Hauer
0 siblings, 0 replies; 4+ messages in thread
From: Sascha Hauer @ 2012-06-29 9:15 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, Jun 28, 2012 at 05:08:30PM +0200, Beno?t Th?baudeau wrote:
> On Thu, Jun 28, 2012 at 12:57:20PM +0200, Sascha Hauer wrote:
> > On Wed, Jun 27, 2012 at 10:28:26PM +0200, Beno?t Th?baudeau wrote:
> > > The data sheet of the i.MX35 says it is an ARM1136JF-S processor,
> > > version r1p3,
> > > which, according to section "B.1. New instructions" of the
> > > ARM1136JF-S and
> > > ARM1136J-S Technical Reference Manual, makes the i.MX35 CPU
> > > architecture not
> > > only ARMv6, but ARMv6k.
> >
> > Is this true for i.MX31 aswell?
>
> No.
>
> > If not, we would have to add
> > additional
> > magic to enable CPU_V6K only when SOC_IMX31 is not selected.
>
> Why? That could be "select CPU_V6K if !SOC_IMX31", but e.g. CPU_V7 is selected
> by SOC_IMX5 whether or not SOC_IMX31 or SOC_IMX35 is selected, and CPU_V6/6K/7
> conflicts are handled with priorities by the ARM infrastructure.
A boot test on i.MX31 shows that you are probably right. I remember a
time when enabling CPU_V6K caused trouble, but it seems this has been
sorted out.
So, applied this one.
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
^ permalink raw reply [flat|nested] 4+ messages in thread
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2012-06-27 20:28 [PATCH] ARM: imx: fix i.MX35 CPU architecture Benoît Thébaudeau
2012-06-28 10:57 ` Sascha Hauer
2012-06-28 15:08 ` Benoît Thébaudeau
2012-06-29 9:15 ` Sascha Hauer
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