On Thu, Mar 12, 2015 at 9:25 AM, Daniel Lezcano
<daniel.lezcano@xxxxxxxxxx> wrote:
>
> Catalin, Rob,
>
> do you agree with this patchset ?
There's very little to do with DT, but looks fine to me.
Rob
>
> Thanks
> -- Daniel
>
>
> On 03/03/2015 01:29 PM, Daniel Lezcano wrote:
>>
>> There is a big number of cpuidle drivers for the ARM architecture.
>>
>> These drivers have been cleaned up and grouped into the drivers/cpuidle
>> directory to keep track of the changes more easily and ensure the code
>> is following the same scheme across the drivers.
>>
>> That had the benefit of simplifying the code and factor out a lot of
>> common
>> parts. Beside that, as the drivers belong to the 'drivers' directory, we
>> had
>> to split the arch specific bits and the generic code in order to keep
>> everything self contained. The platform driver paradigm was used for this
>> purpose.
>>
>> Unfortunately, this approach is now no longer accepted and a different
>> solution
>> must be provided to reach the same goal: one example is the Qualcomm
>> cpuidle
>> driver upstreaming attempt [1].
>>
>> In the meantime, ARM64 developed a generic cpuidle driver based on DT
>> definition.
>>
>> The DT definition provides an 'enable-method' to specify one of the cpu
>> operations (PSCI, ...).
>>
>> This patchset unify this driver with ARM32, using the same DT definition.
>>
>> Thanks with this patchset we can use the 'enable-method' to specify a cpu
>> operations, hence get rid of the platform driver approach and go further
>> in the
>> cpuidle driver flexibility via the DT.
>>
>> Daniel Lezcano (6):
>> ARM: cpuidle: Remove duplicate header inclusion
>> ARM: cpuidle: Add a cpuidle ops structure to be used for DT
>> ARM64: cpuidle: Replace cpu_suspend by the common ARM/ARM64 function
>> ARM64: cpuidle: Rename cpu_init_idle to a common function name
>> ARM64: cpuidle: Remove arm64 reference
>> ARM: cpuidle: Enable the ARM64 driver for both ARM32/ARM64
>>
>> arch/arm/include/asm/cpuidle.h | 12 +++
>> arch/arm/include/asm/cpuidle_ops.h | 3 +
>> arch/arm/kernel/cpuidle.c | 87
>> +++++++++++++++++++++-
>> arch/arm/mach-davinci/cpuidle.c | 1 -
>> arch/arm/mach-imx/cpuidle-imx6q.c | 1 -
>> arch/arm/mach-imx/cpuidle-imx6sl.c | 1 -
>> arch/arm/mach-imx/cpuidle-imx6sx.c | 1 -
>> arch/arm/mach-omap2/cpuidle44xx.c | 1 -
>> arch/arm/mach-tegra/cpuidle-tegra20.c | 1 -
>> arch/arm/mach-tegra/cpuidle-tegra30.c | 1 -
>> arch/arm64/include/asm/cpuidle.h | 9 ++-
>> arch/arm64/kernel/cpuidle.c | 2 +-
>> drivers/cpuidle/Kconfig | 7 +-
>> drivers/cpuidle/Kconfig.arm | 10 +++
>> drivers/cpuidle/Kconfig.arm64 | 13 ----
>> drivers/cpuidle/Makefile | 5 +-
>> drivers/cpuidle/{cpuidle-arm64.c => cpuidle-arm.c} | 38 +++++-----
>> drivers/cpuidle/cpuidle-at91.c | 1 -
>> drivers/cpuidle/cpuidle-exynos.c | 1 -
>> drivers/cpuidle/cpuidle-kirkwood.c | 1 -
>> drivers/cpuidle/cpuidle-ux500.c | 1 -
>> drivers/cpuidle/cpuidle-zynq.c | 1 -
>> 22 files changed, 139 insertions(+), 59 deletions(-)
>> create mode 100644 arch/arm/include/asm/cpuidle_ops.h
>> delete mode 100644 drivers/cpuidle/Kconfig.arm64
>> rename drivers/cpuidle/{cpuidle-arm64.c => cpuidle-arm.c} (72%)
>>
>
>
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