path: root/Documentation
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authorSudeep Holla <sudeep.holla@arm.com>2016-04-22 16:18:02 +0100
committerArnd Bergmann <arnd@arndb.de>2016-04-26 12:46:08 +0200
commit978fa436231a834dc686292efc7d944d9013e035 (patch)
tree7bc40f3e6e9e327ff0a28203fea64bfd5a84f2eb /Documentation
parent004cb62efd5e9e4772efb46b49c16fa2618ecf3e (diff)
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>
Diffstat (limited to 'Documentation')
1 files changed, 0 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/arm/cpus.txt b/Documentation/devicetree/bindings/arm/cpus.txt
index ccc62f145306..3f0cbbb8395f 100644
--- a/Documentation/devicetree/bindings/arm/cpus.txt
+++ b/Documentation/devicetree/bindings/arm/cpus.txt
@@ -192,7 +192,6 @@ nodes to be present and contain the properties described below.
can be one of:
- "arm,psci"