Subject: [PATCH v2] drivers: firmware: psci: unify enable-method binding on ARM {64,32}-bit systems

From: [email-masked] (Sudeep Holla)
Date: Tue, 26 Apr 2016 11:42:58 +0100

On 22/04/16 16:18, Sudeep Holla wrote:
> Currently ARM CPUs DT bindings allows different enable-method value for
> PSCI based systems. On ARM 64-bit this property is required and must be
> "psci" while on ARM 32-bit systems this property is optional and must
> be "arm,psci" if present.
>
> However, "arm,psci" has always been the compatible string for the PSCI
> node, and was never intended to be the enable-method. So this is a bug
> in the binding and not a deliberate attempt at specifying 32-bit
> differently.
>
> This is problematic if 32-bit OS is run on 64-bit system which has
> "psci" as enable-method rather than the expected "arm,psci".
>
> So let's unify the value into "psci" and remove support for "arm,psci"
> before it finds any users.
>
> Reported-by: Soby Mathew <[email-masked]>
> Cc: Rob Herring <[email-masked]>
> Acked-by: Mark Rutland <[email-masked]>
> Acked-by: Lorenzo Pieralisi <[email-masked]>
> Signed-off-by: Sudeep Holla <[email-masked]>
> ---
>   Documentation/devicetree/bindings/arm/cpus.txt | 1 -
>   drivers/firmware/psci.c                        | 2 +-
>   2 files changed, 1 insertion(+), 2 deletions(-)
>
> v2->v1:
> 	- Added Mark and Lorenzo's ACKs
> 	- Updated commit message to specify that it also conflicts with
> 	  PSCI compatible(from Mark's reply on the thread)
>
> Hi ARM-SoC guys,
>
> Can you please pick up this single fix for PSCI binding/driver for v4.6 ?
>

Gentle ping to include this in next round of arm-soc fixes. It would be
good to get this fixed before v4.6 as we don't want to have user of the
binding which we want to remove in the release.

-- 
Regards,
Sudeep