On Thu, Dec 15, 2011 at 09:46:20AM +0800, Shawn Guo wrote: > On Thu, Dec 15, 2011 at 09:02:20AM +0800, Richard Zhao wrote: > > On Wed, Dec 14, 2011 at 03:01:19PM +0000, Dave Martin wrote: > > > On Wed, Dec 14, 2011 at 10:05:04PM +0800, Richard Zhao wrote: > > > > On Wed, Dec 14, 2011 at 09:26:24PM +0800, Shawn Guo wrote: > > > > > Hi Dave, > > > > > > > > > > Sorry for that I did not look into previous post to point it out. > > > > > > > > > > On Wed, Dec 14, 2011 at 11:39:41AM +0000, Dave Martin wrote: > > > > > > The i.MX6 Quad SoC will work without the l2x0 L2 cache controller > > > > > > support built into the kernel, so this patch removes the dependency > > > > > > on CACHE_L2X0 and selects MIGHT_HAVE_CACHE_L2X0 instead. > > > > > > > > > > > > This makes the l2x0 support optional, so that it can be turned off > > > > > > when desired for debugging purposes etc. > > > > > > > > > > > > Thanks to Shawn Guo for this suggestion. [1] > > > > > > > > > > > > Signed-off-by: Dave Martin <dave.martin@xxxxxxxxxx> > > > > > > > > > > > > [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2011-November/074602.html > > > > > > --- > > > > > > arch/arm/mach-imx/Kconfig | 2 +- > > > > > > 1 files changed, 1 insertions(+), 1 deletions(-) > > > > > > > > > > > > diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig > > > > > > index 29a3d61..1fb93f2 100644 > > > > > > --- a/arch/arm/mach-imx/Kconfig > > > > > > +++ b/arch/arm/mach-imx/Kconfig > > > > > > @@ -609,13 +609,13 @@ comment "i.MX6 family:" > > > > > > config SOC_IMX6Q > > > > > > bool "i.MX6 Quad support" > > > > > > select ARM_GIC > > > > > > - select CACHE_L2X0 > > > > > > select CPU_V7 > > > > > > select HAVE_ARM_SCU > > > > > > select HAVE_IMX_GPC > > > > > > select HAVE_IMX_MMDC > > > > > > select HAVE_IMX_SRC > > > > > > select HAVE_SMP > > > > > > + select MIGHT_HAVE_CACHE_L2X0 > > > > > > > > > > The option SOC_IMX6Q is only available when ARCH_IMX_V6_V7 is selected. > > > > > Since MIGHT_HAVE_CACHE_L2X0 has been selected by ARCH_IMX_V6_V7 in > > > > > patch #1, this line seems redundant here. > > > > Would it be better keep this one and remove patch #1 one? imx5 doesn't have > > > > l2x0. > > > > > > Do you mean to remove MIGHT_HAVE_CACHE_L2X0 from ARCH_IMX_V6_V7, and select > > > it only from SOC_IMX6Q? > > Yes, I think it's more precise. Shawn? > > > No. > > * imx5 hardware does have L2, and it's just not set up in the kernel > (I do not know why). > * Currently, ARCH_IMX_V6_V7 only covers imx3 and imx6, and both are > calling l2x0 init function to set L2 up. > * When we merge mach-mx5 into mach-imx to have ARCH_IMX_V6_V7 cover > imx3, imx5 and imx6, there is no reason for us to not set L2 up for > imx5 too. > > So MIGHT_HAVE_CACHE_L2X0 really should be selected by ARCH_IMX_V6_V7. mx5/cortex-a8 don't use L2X0. But that's ok. MIGHT_HAVE_CACHE_L2X0 is just a hint. Please Shawn's suggestion. Thanks Richard > > -- > Regards, > Shawn -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
