[PATCH v5 1/8] PM / Domains: Add DT bindings for power-on/off latencies
From: geert+renesas@glider.be (Geert Uytterhoeven)
Date: 2014-11-17 13:31:02
Also in:
linux-devicetree, linux-pm, linux-sh, lkml
Subsystem:
generic pm domains, open firmware and flattened device tree bindings, the rest · Maintainers:
Ulf Hansson, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
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@glider.be> Acked-by: Kevin Hilman <redacted> Reviewed-by: Ulf Hansson <redacted> --- 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 at 12340000 { 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==
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1.9.1