linux-kernel - [PATCH v5 1/8] PM / Domains: Add DT bindings for power-on/off latencies

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Date:	Mon, 17 Nov 2014 14:30:37 +0100
From:	Geert Uytterhoeven <geert+renesas@...der.be>
To:	Simon Horman <horms@...ge.net.au>,
	Magnus Damm <magnus.damm@...il.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Ulf Hansson <ulf.hansson@...aro.org>,
	Kevin Hilman <khilman@...aro.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Philipp Zabel <philipp.zabel@...il.com>,
	Tomasz Figa <tomasz.figa@...il.com>, linux-sh@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert+renesas@...der.be>
Subject: [PATCH v5 1/8] PM / Domains: Add DT bindings for power-on/off latencies

PM domain power on/off-latencies are properties of the hardware.
In legacy code, they're specified from platform code.
On DT platforms, their values should come from DT.

Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
Acked-by: Kevin Hilman <khilman@...aro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>
---
v5:
  - No changes,
v4:
  - Add Reviewed-by,
  - Replace single latency value by list of latencies,
v3:
  - No changes,
v2:
  - Add Acked-by.
---
 Documentation/devicetree/bindings/power/power_domain.txt | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt
index 98c16672ab5f49e0..c4a4afb2ac3b0500 100644
--- a/Documentation/devicetree/bindings/power/power_domain.txt
+++ b/Documentation/devicetree/bindings/power/power_domain.txt
@@ -19,16 +19,26 @@ Required properties:
    providing multiple PM domains (e.g. power controllers), but can be any value
    as specified by device tree binding documentation of particular provider.
 
+Optional properties:
+ - power-on-latency: List of power-on latencies (in ns), one for each PM
+   domain. If all power-on latencies are identical, the list may be shortened
+   to a single value.
+ - power-off-latency: List of power-off latencies (in ns), one for each PM
+   domain. If all power-off latencies are identical, the list may be shortened
+   to a single value.
+
 Example:
 
 	power: power-controller@...40000 {
 		compatible = "foo,power-controller";
 		reg = <0x12340000 0x1000>;
 		#power-domain-cells = <1>;
+		power-on-latency = <250000 400000 180000>;
+		power-off-latency = <250000 400000 300000>;
 	};
 
-The node above defines a power controller that is a PM domain provider and
-expects one cell as its phandle argument.
+The node above defines a power controller that is a PM domain provider for
+3 PM domains, and expects one cell as its phandle argument.
 
 ==PM domain consumers==
 
-- 
1.9.1

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