[PATCH v3 8/8] PM / doc: Update device documentation for devices in IRQ safe PM domains
From: Lina Iyer <hidden>
Date: 2016-10-14 17:48:20
Also in:
linux-arm-msm, linux-pm
Subsystem:
suspend to ram, the rest · Maintainers:
"Rafael J. Wysocki", Linus Torvalds
Update documentation to reflect the changes made to support IRQ safe PM domains. Signed-off-by: Lina Iyer <redacted> Acked-by: Ulf Hansson <redacted> --- Documentation/power/devices.txt | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/Documentation/power/devices.txt b/Documentation/power/devices.txt
index 8ba6625..0401b53 100644
--- a/Documentation/power/devices.txt
+++ b/Documentation/power/devices.txt@@ -607,7 +607,14 @@ individually. Instead, a set of devices sharing a power resource can be put into a low-power state together at the same time by turning off the shared power resource. Of course, they also need to be put into the full-power state together, by turning the shared power resource on. A set of devices with this -property is often referred to as a power domain. +property is often referred to as a power domain. A power domain may also be +nested inside another power domain. + +Devices and PM domains may be defined as IRQ-safe, if they can be powered +on/off even when the IRQs are disabled. An IRQ-safe device in a domain will +disallow power management on the domain, unless the domain is also defined as +IRQ-safe. The restriction this framework imposes on the parent domain of an +IRQ-safe domain is that it must also be defined as IRQ-safe. Support for power domains is provided through the pm_domain field of struct device. This field is a pointer to an object of type struct dev_pm_domain,
--
2.7.4