[PATCH v2 2/2] ARM64: kernel: PSCI: move PSCI idle management code to drivers/firmware

Catalin Marinas catalin.marinas at arm.com
Mon Oct 12 08:37:39 PDT 2015

On Mon, Oct 12, 2015 at 12:17:08PM +0100, Lorenzo Pieralisi wrote:
> ARM64 PSCI kernel interfaces that initialize idle states and implement
> the suspend API to enter them are generic and can be shared with the
> ARM architecture.
> To achieve that goal, this patch moves ARM64 PSCI idle management
> code to drivers/firmware by creating a file that contains PSCI
> helper functions implementing the common kernel interface required
> by ARM and ARM64 to share the PSCI idle management code.
> The ARM generic CPUidle implementation also requires the definition of
> a cpuidle_ops section entry for the kernel to initialize the CPUidle
> operations at boot based on the enable-method (ie ARM64 has the
> statically initialized cpu_ops counterparts for that purpose); therefore
> this patch also adds the required section entry on CONFIG_ARM for PSCI so
> that the kernel can initialize the PSCI CPUidle back-end when PSCI is
> the probed enable-method.
> On ARM64 this patch provides no functional change.
> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi at arm.com>
> Cc: Will Deacon <will.deacon at arm.com>
> Cc: Sudeep Holla <sudeep.holla at arm.com>
> Cc: Russell King <linux at arm.linux.org.uk>
> Cc: Daniel Lezcano <daniel.lezcano at linaro.org>
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Mark Rutland <mark.rutland at arm.com>
> Cc: Jisheng Zhang <jszhang at marvell.com>
> ---
>  arch/arm64/kernel/psci.c       |  99 +-----------------------------
>  drivers/firmware/Makefile      |   2 +-
>  drivers/firmware/psci_cpuops.c | 133 +++++++++++++++++++++++++++++++++++++++++
>  include/linux/psci.h           |   3 +

For the arch/arm64 part:

Acked-by: Catalin Marinas <catalin.marinas at arm.com>

More information about the linux-arm-kernel mailing list