[GIT PULL] Amlogic SoC updates for v4.15

[GIT PULL] Amlogic SoC updates for v4.15

[Kevin Hilman]

The following changes since commit 2bd6bf03f4c1c59381d62c61d03f6cc3fe71f66e:

  Linux 4.14-rc1 (2017-09-16 15:47:51 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic.git tags/amlogic-soc

for you to fetch changes up to dea54268f3925d05e75b9c6dec487a6515dc0ed5:

  ARM: meson: enable MESON_IRQ_GPIO in Kconfig for meson8b (2017-10-29 08:40:08 -0700)

----------------------------------------------------------------
Amlogic SoC updates for v4.15
- add SMP support to Meson8/8b

----------------------------------------------------------------
Carlo Caione (1):
      dt-bindings: Amlogic: Add Meson8 and Meson8b SMP related documentation

Jerome Brunet (1):
      ARM: meson: enable MESON_IRQ_GPIO in Kconfig for meson8b

Martin Blumenstingl (3):
      ARM: smp_scu: add a helper for powering on a specific CPU
      ARM: smp_scu: allow the platform code to read the SCU CPU status
      ARM: meson: Add SMP bringup code for Meson8 and Meson8b

 Documentation/devicetree/bindings/arm/amlogic/pmu.txt      |  18 ++++
 Documentation/devicetree/bindings/arm/amlogic/smp-sram.txt |  32 +++++++
 Documentation/devicetree/bindings/arm/cpus.txt             |   2 +
 arch/arm/Makefile                                          |   1 +
 arch/arm/include/asm/smp_scu.h                             |  12 +++
 arch/arm/kernel/smp_scu.c                                  |  43 +++++++--
 arch/arm/mach-meson/Kconfig                                |   2 +
 arch/arm/mach-meson/Makefile                               |   1 +
 arch/arm/mach-meson/platsmp.c                              | 440 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 9 files changed, 545 insertions(+), 6 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/amlogic/pmu.txt
 create mode 100644 Documentation/devicetree/bindings/arm/amlogic/smp-sram.txt
 create mode 100644 arch/arm/mach-meson/platsmp.c

[GIT PULL] Amlogic SoC updates for v4.15

[Arnd Bergmann]

On Sun, Oct 29, 2017 at 5:43 PM, Kevin Hilman <khilman@baylibre.com> wrote:

> ----------------------------------------------------------------
> Amlogic SoC updates for v4.15
> - add SMP support to Meson8/8b

Pulled into next/soc. For my understanding, could you clarify what
this line is needed for on meson?

+textofs-$(CONFIG_ARCH_MESON) := 0x00208000

Thanks,

    Arnd

[GIT PULL] Amlogic SoC updates for v4.15

[Kevin Hilman]

[ + Martin ]
Arnd Bergmann <arnd@arndb.de> writes:

> On Sun, Oct 29, 2017 at 5:43 PM, Kevin Hilman <khilman@baylibre.com> wrote:
>
>> ----------------------------------------------------------------
>> Amlogic SoC updates for v4.15
>> - add SMP support to Meson8/8b
>
> Pulled into next/soc. For my understanding, could you clarify what
> this line is needed for on meson?
>
> +textofs-$(CONFIG_ARCH_MESON) := 0x00208000

I belive this is due to the first 2M being reserved for secure memory
on some Meson8 SoCs, but maybe Martin can add more clarification if
needed.

Kevin

[GIT PULL] Amlogic SoC updates for v4.15

[Martin Blumenstingl]

Hi Arnd,

On Mon, Oct 30, 2017 at 11:26 AM, Arnd Bergmann <arnd@arndb.de> wrote:
> On Sun, Oct 29, 2017 at 5:43 PM, Kevin Hilman <khilman@baylibre.com> wrote:
>
>> ----------------------------------------------------------------
>> Amlogic SoC updates for v4.15
>> - add SMP support to Meson8/8b
>
> Pulled into next/soc. For my understanding, could you clarify what
> this line is needed for on meson?
>
> +textofs-$(CONFIG_ARCH_MESON) := 0x00208000
this was already part of Carlo's version of the SMP patches. I didn't
question this change (I simply assumed that it's relevant - I never
questioned "why" it was relevant) so far
however, that was until Linus L?ssing (CC'ed) investigated a
bug-report from Emiliano Ingrassia (also CC'ed). you can find his
results here: [0]
(tl;dr: kernel refuses to boot without this change when using a
slightly modified multi_v7_defconfig)

Linus even asked me to split this change out into a separate patch [1]
however, by the time I came back home Kevin already sent out the pull request

please let me know if
- we can keep the patches the way they are right now
- or if you want to separate this change into a separate patch


Regards
Martin


[0] https://lkml.org/lkml/2017/10/28/148
[1] http://lists.infradead.org/pipermail/linux-amlogic/2017-October/005155.html

[GIT PULL] Amlogic SoC updates for v4.15

[Arnd Bergmann]

On Mon, Oct 30, 2017 at 10:52 PM, Martin Blumenstingl
<martin.blumenstingl@googlemail.com> wrote:
> Hi Arnd,
>
> On Mon, Oct 30, 2017 at 11:26 AM, Arnd Bergmann <arnd@arndb.de> wrote:
>> On Sun, Oct 29, 2017 at 5:43 PM, Kevin Hilman <khilman@baylibre.com> wrote:
>>
>>> ----------------------------------------------------------------
>>> Amlogic SoC updates for v4.15
>>> - add SMP support to Meson8/8b
>>
>> Pulled into next/soc. For my understanding, could you clarify what
>> this line is needed for on meson?
>>
>> +textofs-$(CONFIG_ARCH_MESON) := 0x00208000
> this was already part of Carlo's version of the SMP patches. I didn't
> question this change (I simply assumed that it's relevant - I never
> questioned "why" it was relevant) so far
> however, that was until Linus L?ssing (CC'ed) investigated a
> bug-report from Emiliano Ingrassia (also CC'ed). you can find his
> results here: [0]
> (tl;dr: kernel refuses to boot without this change when using a
> slightly modified multi_v7_defconfig)
>
> Linus even asked me to split this change out into a separate patch [1]
> however, by the time I came back home Kevin already sent out the pull request
>
> please let me know if
> - we can keep the patches the way they are right now
> - or if you want to separate this change into a separate patch
>

I think it's good enough to keep it this time, especially now that your
explanation is in the mailing list archives. If you get into a similar
situation again, splitting up the patch is better though.

     Arnd