[PATCH v2 0/2] Enabling PSCI based idle on ARM 32-bit platforms
lorenzo.pieralisi at arm.com
Tue Oct 13 03:44:24 PDT 2015
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:
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 ?
> 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:
> >- 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
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