[PATCHv6] ARM: dts: add exynos5422-cpus.dtsi to correct cpu order
kgene at kernel.org
Mon Jul 13 22:04:19 PDT 2015
Krzysztof Kozlowski wrote:
> On 14.07.2015 09:24, Chanho Park wrote:
> > The odroid-xu3 board which is based on exynos5422 not exynos5800 is
> > booted from cortex-a7 core unlike exynos5800. The odroid-xu3's cpu order
> > is quite strange. cpu0 and cpu5-7 are cortex-a7 cores and cpu1-4 are
> > cortex-a15 cores. To correct this mis-odering, I added exynos5422-cpus.dtsi
> > and reversing cpu orders from exynos5420. Now, cpu0-3 are cortex-a7 and
> > cpu4-7 are cortex-a15.
> > Reviewed-by: Krzysztof Kozlowski <k.kozlowski at samsung.com>
> > Signed-off-by: Chanho Park <parkch98 at gmail.com>
> > ---
> > Change from v4:
> > - Resend patch with correct signed-off
> > Changes from v4:
> > - Remove temporal patch in e-mail body
> > Changes from v3:
> > - include this exynos5422-cpus.dtsi in the exynos5422-odroidxu3-common.dtsi
> > Changes from v2:
> > - drop inclusion of exynos5420.dtsi from exynos5422-cpus.dtsi
> > - drop compatibles from exynos5422-cpus.dtsi
> > Changes from v1:
> > - rename exynos5422.dtsi to exynos5422-cpus.dtsi
> > - include the dtsi file top of the exynos5422-odroidxu3.dts
> > Secondary cpu booting problem is not resolved yet. Need more investigations
> > to work booting 8 cores correctly.
> > : http://www.spinics.net/lists/linux-samsung-soc/msg45525.html
> > arch/arm/boot/dts/exynos5422-cpus.dtsi | 81 ++++++++++++++++++++++
> > arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 1 +
> > 2 files changed, 82 insertions(+)
> > create mode 100644 arch/arm/boot/dts/exynos5422-cpus.dtsi
> Thanks, applied to my tree. I'll send it to Kukjin for v4.3 unless he
> picks it also.
Well, let me see. I'm thinking we need to sort out the cpu ordering and dtsi
inclusions for exynos5420, 5422 and 5800 related to DT files.
1) exynos5420 DT (cpu0~3: a15, cpu 4~7: a7)
2) exynos5800 DT is including exynos5420 DT
3) exynos5422 and exynos5800 based boards are including exynos5800 DT.
Then making exynos5422-cpus DT for exynos5422 based boards?
(cpu0~3: a7, cpu4~7: a15)
I think, it could cause confusion when new board based on them are added
because it's not clear and the boot cpu could be selected by bootloader part.
So how about creating exynos5422-cpus and exynos5420-cpus then including the
cpus DT file in each board accordingly?
Or more clear way to avoid confusion?
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