Subject: [PATCH] PM / Domains: Fix compatible for domain idle state

From: [email-masked] (Lina Iyer)
Date: Wed, 8 Feb 2017 09:42:42 -0700

On Wed, Feb 08 2017 at 09:35 -0700, Lina Iyer wrote:
>Re-using idle state definition provided by arm,idle-state for domain
>idle states creates a lot of confusion and limits further evolution of
>the domain idle definition. To keep things clear and simple, define a
>idle states for domain using a new compatible "domain-idle-state".
>
>Fix existing PM domains code to look for the newly defined compatible.
>
>Cc: <[email-masked]>
>Cc: Rob Herring <[email-masked]>
>Signed-off-by: Lina Iyer <[email-masked]>

Sorry, this has already been applied. Got tagged along with the email.
Kindly ignore.

Thanks,
Lina

>---
> .../bindings/power/domain-idle-state.txt           | 33 ++++++++++++++++++++++
> .../devicetree/bindings/power/power_domain.txt     |  8 +++---
> drivers/base/power/domain.c                        |  2 +-
> 3 files changed, 38 insertions(+), 5 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/power/domain-idle-state.txt
>
>diff --git a/Documentation/devicetree/bindings/power/domain-idle-state.txt b/Documentation/devicetree/bindings/power/domain-idle-state.txt
>new file mode 100644
>index 0000000..eefc7ed
>--- /dev/null
>+++ b/Documentation/devicetree/bindings/power/domain-idle-state.txt
>@@ -0,0 +1,33 @@
>+PM Domain Idle State Node:
>+
>+A domain idle state node represents the state parameters that will be used to
>+select the state when there are no active components in the domain.
>+
>+The state node has the following parameters -
>+
>+- compatible:
>+	Usage: Required
>+	Value type: <string>
>+	Definition: Must be "domain-idle-state".
>+
>+- entry-latency-us
>+	Usage: Required
>+	Value type: <prop-encoded-array>
>+	Definition: u32 value representing worst case latency in
>+		    microseconds required to enter the idle state.
>+		    The exit-latency-us duration may be guaranteed
>+		    only after entry-latency-us has passed.
>+
>+- exit-latency-us
>+	Usage: Required
>+	Value type: <prop-encoded-array>
>+	Definition: u32 value representing worst case latency
>+		    in microseconds required to exit the idle state.
>+
>+- min-residency-us
>+	Usage: Required
>+	Value type: <prop-encoded-array>
>+	Definition: u32 value representing minimum residency duration
>+		    in microseconds after which the idle state will yield
>+		    power benefits after overcoming the overhead in entering
>+i		    the idle state.
>diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt
>index e165036..723e1ad 100644
>--- a/Documentation/devicetree/bindings/power/power_domain.txt
>+++ b/Documentation/devicetree/bindings/power/power_domain.txt
>@@ -31,7 +31,7 @@ Optional properties:
>
> - domain-idle-states : A phandle of an idle-state that shall be soaked into a
>                 generic domain power state. The idle state definitions are
>-                compatible with arm,idle-state specified in [1].
>+                compatible with domain-idle-state specified in [1].
>   The domain-idle-state property reflects the idle state of this PM domain and
>   not the idle states of the devices or sub-domains in the PM domain. Devices
>   and sub-domains have their own idle-states independent of the parent
>@@ -85,7 +85,7 @@ Example 3:
> 	};
>
> 	DOMAIN_RET: state at 0 {
>-		compatible = "arm,idle-state";
>+		compatible = "domain-idle-state";
> 		reg = <0x0>;
> 		entry-latency-us = <1000>;
> 		exit-latency-us = <2000>;
>@@ -93,7 +93,7 @@ Example 3:
> 	};
>
> 	DOMAIN_PWR_DN: state at 1 {
>-		compatible = "arm,idle-state";
>+		compatible = "domain-idle-state";
> 		reg = <0x1>;
> 		entry-latency-us = <5000>;
> 		exit-latency-us = <8000>;
>@@ -118,4 +118,4 @@ The node above defines a typical PM domain consumer device, which is located
> inside a PM domain with index 0 of a power controller represented by a node
> with the label "power".
>
>-[1]. Documentation/devicetree/bindings/arm/idle-states.txt
>+[1]. Documentation/devicetree/bindings/power/domain-idle-state.txt
>diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
>index 661737c..f0bc672 100644
>--- a/drivers/base/power/domain.c
>+++ b/drivers/base/power/domain.c
>@@ -2048,7 +2048,7 @@ int genpd_dev_pm_attach(struct device *dev)
> EXPORT_SYMBOL_GPL(genpd_dev_pm_attach);
>
> static const struct of_device_id idle_state_match[] = {
>-	{ .compatible = "arm,idle-state", },
>+	{ .compatible = "domain-idle-state", },
> 	{ }
> };
>
>-- 
>2.7.4
>