[PATCH v2 0/5] drivers: firmware: psci: add basic v1.0 support

[lorenzo.pieralisi@arm.com (Lorenzo Pieralisi)]

On Wed, Jul 08, 2015 at 06:16:46PM +0100, Lorenzo Pieralisi wrote:
> This series is a v2 of a previous posting:
> 
> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-May/347352.html
> 
> v1 -> v2:
> 
> - rebased against v4.2-rc1
> - added version to 1.0 specific macros
> 
> The PSCI v1.0 specification[1] introduces a brand new set of features
> (ie OS initiated mode and system suspend being the most notable ones)
> and provides updates to the PSCI 0.2 specification, keeping backward
> compatibility.
> 
> PSCI v1.0 applies minor changes to function return codes and function
> behaviour (ie AFFINITY_INFO requirements, INVALID_ADDRESS return value)
> and introduces a new power_state parameter format (extended stateid)
> that is probeable with the newly introduced PSCI_FEATURES call.
> 
> This series upgrades the current kernel PSCI layer implementation with
> a set of patches that make the kernel PSCI v1.0 compliant.
> 
> The series augments the PSCI firmware layer with a hook to retrieve
> the features for a specific PSCI function (ie based on the PSCI_FEATURES
> call) and uses it to detect the power_state parameter format, updating
> the power_state parameter handling functions accordingly.
> 
> In order to prevent firmware interfaces mismatch, a new compatible
> string is added to the DT bindings to characterize a 1.0 compliant
> firmware interface.
> 
> The series is built on top of M.Rutland's patch series:
> 
> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/353795.html
> 
> Tested on a Juno board.

Rebased against 4.3-rc1 (that includes the patch series above), if there
are no objections I will queue this series for v4.4.

Thanks,
Lorenzo

> 
> [1] http://infocenter.arm.com/help/topic/com.arm.doc.den0022c/DEN0022C_Power_State_Coordination_Interface.pdf
> 
> Lorenzo Pieralisi (5):
>   drivers: firmware: psci: add INVALID_ADDRESS return value
>   drivers: firmware: psci: move power_state handling to generic code
>   drivers: firmware: psci: add PSCI_FEATURES call
>   drivers: firmware: psci: add extended stateid power_state support
>   drivers: firmware: psci: add PSCI v1.0 DT bindings
> 
>  Documentation/devicetree/bindings/arm/psci.txt |  6 +++
>  arch/arm64/kernel/psci.c                       | 14 -------
>  drivers/firmware/psci.c                        | 53 ++++++++++++++++++++++++++
>  include/linux/psci.h                           |  2 +
>  include/uapi/linux/psci.h                      | 15 ++++++++
>  5 files changed, 76 insertions(+), 14 deletions(-)
> 
> -- 
> 2.2.1
>