PM QoS device start/stop and save/restore state latencies are more or
less 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@xxxxxxxxx>
---
Should these properties be called "linux,*-latency"?
v2:
- New
---
Documentation/devicetree/bindings/power/power_domain.txt | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/Documentation/devicetree/bindings/power/power_domain.txt b/Documentation/devicetree/bindings/power/power_domain.txt
index 7bc421d84367d636..024815bc257723b1 100644
--- a/Documentation/devicetree/bindings/power/power_domain.txt
+++ b/Documentation/devicetree/bindings/power/power_domain.txt
@@ -42,12 +42,22 @@ Required properties:
- power-domains : A phandle and PM domain specifier as defined by bindings of
the power controller specified by phandle.
+Optional properties:
+ - stop-latency: Stop latency of the device, in ns,
+ - start-latency: Start latency of the device, in ns,
+ - save-state-latency: Save-state latency of the device, in ns,
+ - restore-state-latency: Restore-state latency of the device, in ns.
+
Example:
leaky-device@12350000 {
compatible = "foo,i-leak-current";
reg = <0x12350000 0x1000>;
power-domains = <&power 0>;
+ stop-latency = <250000>;
+ start-latency = <250000>;
+ save-state-latency = <250000>;
+ restore-state-latency = <250000>;
};
The node above defines a typical PM domain consumer device, which is located
--
1.9.1
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