diff options
| author | Sudeep Holla <sudeep.holla@arm.com> | 2016-04-22 16:18:02 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2016-04-26 12:46:08 +0200 |
| commit | 978fa436231a834dc686292efc7d944d9013e035 (patch) | |
| tree | 7bc40f3e6e9e327ff0a28203fea64bfd5a84f2eb | |
| parent | 004cb62efd5e9e4772efb46b49c16fa2618ecf3e (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>
| -rw-r--r-- | Documentation/devicetree/bindings/arm/cpus.txt | 1 | ||||
| -rw-r--r-- | drivers/firmware/psci.c | 2 |
2 files changed, 1 insertions, 2 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: "allwinner,sun6i-a31" "allwinner,sun8i-a23" - "arm,psci" "arm,realview-smp" "brcm,bcm-nsp-smp" "brcm,brahma-b15" diff --git a/drivers/firmware/psci.c b/drivers/firmware/psci.c index 11bfee8b79a9..b5d05807e6ec 100644 --- a/drivers/firmware/psci.c +++ b/drivers/firmware/psci.c @@ -360,7 +360,7 @@ static struct cpuidle_ops psci_cpuidle_ops __initdata = { .init = psci_dt_cpu_init_idle, }; -CPUIDLE_METHOD_OF_DECLARE(psci, "arm,psci", &psci_cpuidle_ops); +CPUIDLE_METHOD_OF_DECLARE(psci, "psci", &psci_cpuidle_ops); #endif #endif |