]> git.baikalelectronics.ru Git - kernel.git/commit
drivers: firmware: psci: unify enable-method binding on ARM {64,32}-bit systems
authorSudeep Holla <sudeep.holla@arm.com>
Fri, 22 Apr 2016 15:18:02 +0000 (16:18 +0100)
committerArnd Bergmann <arnd@arndb.de>
Tue, 26 Apr 2016 10:46:08 +0000 (12:46 +0200)
commitb232005071065416818487ad8601a859d59cea48
tree7bc40f3e6e9e327ff0a28203fea64bfd5a84f2eb
parent20b54aeacdd2f6fe99562a26561e157eb6f61495
drivers: firmware: psci: unify enable-method binding on ARM {64,32}-bit systems

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 <Soby.Mathew@arm.com>
Cc: Rob Herring <robh+dt@kernel.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Documentation/devicetree/bindings/arm/cpus.txt
drivers/firmware/psci.c