[PATCH v2 0/2] Enabling PSCI based idle on ARM 32-bit platforms

[Lorenzo Pieralisi]

Hi Daniel, Arnd,

On Tue, Oct 13, 2015 at 01:17:57PM +0200, Daniel Lezcano wrote:
> On 10/13/2015 12:44 PM, Lorenzo Pieralisi wrote:
> >Hi Daniel,
> >
> >On Tue, Oct 13, 2015 at 10:32:05AM +0200, Daniel Lezcano wrote:
> >>
> >>Hi Lorenzo,
> >>
> >>I would like to take this patch through my tree but it does not apply.
> >
> >That's because as I mentioned in the cover letter the series is built
> >on top of:
> >
> >git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/linux.git tags/firmware/psci-1.0
> >
> >Hopefully this tag will soon get pulled in arm-soc, I will respin a v3
> >anyway to add tags and fold psci_cpuops.c in psci.c, how do you want to
> >merge this then ?
> 
> May be you can create a branch with your modifications to be shared
> with arm-soc and me ?

I asked Arnd to create an immutable branch containing the patches
in my pull request below in arm-soc:

http://lists.infradead.org/pipermail/linux-arm-kernel/2015-October/374547.html

I can then resend v3 of this series on top of it, or if you prefer I
will send you a pull request (to a branch based on the arm-soc one with
my patches on top) just let me know.

Thanks !
Lorenzo

> >>Mind to refresh it against linux-pm or v4.3-rc5 ?
> >>
> >>   -- Daniel
> >>
> >>
> >>On 10/12/2015 01:17 PM, Lorenzo Pieralisi wrote:
> >>>This patch series is v2 of a previous posting:
> >>>
> >>>http://lists.infradead.org/pipermail/linux-arm-kernel/2015-October/373756.html
> >>>
> >>>v1->v2:
> >>>
> >>>- Refactored patch 1 to remove cpu parameter from cpuidle_ops
> >>>   suspend hook
> >>>- Refactored psci_cpu_init_idle to stub out dt parsing function and
> >>>   make it usable on both ARM/ARM64 with no additional changes
> >>>- Updated ARM cpuidle_ops to new interfaces
> >>>- Fixed PSCI enable method string in ARM cpuidle_ops struct
> >>>
> >>>PSCI firmware provides a kernel API that, through a standard interface,
> >>>allows to manage power states transitions in a seamless manner for
> >>>ARM and ARM64 systems.
> >>>
> >>>Current PSCI code that initializes CPUidle states on PSCI based
> >>>systems lives in arch/arm64 directory but it is not ARM64 specific
> >>>and can be shared with ARM 32-bit systems so that the generic
> >>>ARM CPUidle driver can leverage the common PSCI interface.
> >>>
> >>>This patch series moves PSCI CPUidle management code to
> >>>drivers/firmware directory so that ARM and ARM64 architecture
> >>>can actually share the code.
> >>>
> >>>It is made up of two patches:
> >>>
> >>>Patch 1 refactors ARM 32-bit generic idle implementation to remove
> >>>the cpu parameter from the cpuidle_ops suspend hook, in preparation
> >>>for a common PSCI implementation for ARM/ARM64 PSCI idle.
> >>>
> >>>Patch 2 moves ARM64 PSCI CPUidle functions implementation to
> >>>drivers/firmware so that it can be shared with ARM 32-bit platforms
> >>>code. This patch also adds a PSCI entry section on ARM 32-bit systems
> >>>so that the PSCI CPUidle back-end can be enabled when the enable-method
> >>>corresponds to PSCI.
> >>>
> >>>Patches apply on top of current patch stack to enable PSCI 1.0:
> >>>
> >>>git://git.kernel.org/pub/scm/linux/kernel/git/lpieralisi/linux.git tags/firmware/psci-1.0
> >>>
> >>>Tested on Juno board (ARM64), compile tested only on ARM 32-bit systems.
> >>>
> >>>Lorenzo Pieralisi (2):
> >>>   ARM: cpuidle: remove cpu parameter from the cpuidle_ops suspend hook
> >>>   ARM64: kernel: PSCI: move PSCI idle management code to
> >>>     drivers/firmware
> >>>
> >>>  arch/arm/include/asm/cpuidle.h |   2 +-
> >>>  arch/arm/kernel/cpuidle.c      |   2 +-
> >>>  arch/arm64/kernel/psci.c       |  99 +-----------------------------
> >>>  drivers/firmware/Makefile      |   2 +-
> >>>  drivers/firmware/psci_cpuops.c | 133 +++++++++++++++++++++++++++++++++++++++++
> >>>  drivers/soc/qcom/spm.c         |  10 ++--
> >>>  include/linux/psci.h           |   3 +
> >>>  7 files changed, 146 insertions(+), 105 deletions(-)
> >>>  create mode 100644 drivers/firmware/psci_cpuops.c
> >>>
> >>
> >>
> >>--
> >>  <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
> >>
> >>Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
> >><http://twitter.com/#!/linaroorg> Twitter |
> >><http://www.linaro.org/linaro-blog/> Blog
> >>
> 
> 
> -- 
>  <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
> 
> Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
> <http://twitter.com/#!/linaroorg> Twitter |
> <http://www.linaro.org/linaro-blog/> Blog
>