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

[daniel.lezcano@linaro.org (Daniel Lezcano)]

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 ?


>> 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
>>>
>>
>>
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