On Fri, Oct 21 2016 at 07:07 -0600, Rafael J. Wysocki wrote:
On Fri, Oct 14, 2016 at 7:47 PM, Lina Iyer <lina.iyer@xxxxxxxxxx> wrote:
Update documentation to reflect the changes made to support IRQ safe PM
domains.
Signed-off-by: Lina Iyer <lina.iyer@xxxxxxxxxx>
Acked-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>
---
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.
I would put this paragraph below, before the last paragraph in the section.
OK.
Also I suppose that a domain should only be defined as "IRQ-safe" if
all of the devices in it are "IRQ-safe" (or there will be problems at
least in principle). If that is the case, it should be stated clearly
in the paragraph you are adding as well.
Will add.
Thanks,
Lina
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