From: lina.iyer@linaro.org (Lina Iyer)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 05/16] PM / doc: Update device documentation for devices in IRQ safe PM domains
Date: Fri, 26 Aug 2016 14:17:47 -0600 [thread overview]
Message-ID: <1472242678-33700-6-git-send-email-lina.iyer@linaro.org> (raw)
In-Reply-To: <1472242678-33700-1-git-send-email-lina.iyer@linaro.org>
Update documentation to reflect the changes made to support IRQ safe PM
domains.
Signed-off-by: Lina Iyer <lina.iyer@linaro.org>
---
Documentation/power/devices.txt | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/Documentation/power/devices.txt b/Documentation/power/devices.txt
index 8ba6625..a622136 100644
--- a/Documentation/power/devices.txt
+++ b/Documentation/power/devices.txt
@@ -607,7 +607,17 @@ 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, by default, operate in process context. If a device can operate in
+IRQ safe context that has to be explicitly indicated by setting the irq_safe
+boolean inside struct generic_pm_domain to be true. Power domains by default,
+operate in process context but could have devices that are IRQ safe. Such
+power domains cannot be powered on/off during runtime PM. On the other hand,
+IRQ safe PM domains that have IRQ safe devices may be powered off when all
+the devices are in idle. An IRQ safe domain may only be attached as a
+subdomain to another IRQ safe domain.
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
next prev parent reply other threads:[~2016-08-26 20:17 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-26 20:17 [PATCH v5 00/16] PM: SoC idle support using PM domains Lina Iyer
2016-08-26 20:17 ` [PATCH v5 01/16] PM / Domains: Allow domain power states to be read from DT Lina Iyer
2016-08-26 20:17 ` [PATCH v5 02/16] dt/bindings: Update binding for PM domain idle states Lina Iyer
2016-09-02 14:21 ` Sudeep Holla
2016-09-02 20:16 ` Lina Iyer
2016-09-12 15:19 ` Brendan Jackman
2016-09-12 16:16 ` Lina Iyer
2016-09-12 17:09 ` Sudeep Holla
2016-09-13 17:50 ` Brendan Jackman
2016-09-13 19:38 ` Lina Iyer
2016-09-14 10:14 ` Brendan Jackman
2016-09-14 11:37 ` Ulf Hansson
2016-09-14 14:55 ` Lina Iyer
2016-09-16 17:13 ` Kevin Hilman
2016-09-16 17:39 ` Sudeep Holla
2016-09-19 15:09 ` Brendan Jackman
2016-09-20 16:17 ` Lina Iyer
2016-09-21 9:48 ` Brendan Jackman
2016-08-26 20:17 ` [PATCH v5 03/16] PM / Domains: Abstract genpd locking Lina Iyer
2016-08-26 20:17 ` [PATCH v5 04/16] PM / Domains: Support IRQ safe PM domains Lina Iyer
2016-08-26 20:17 ` Lina Iyer [this message]
2016-08-26 20:17 ` [PATCH v5 06/16] drivers: cpu: Setup CPU devices to do runtime PM Lina Iyer
2016-08-26 20:17 ` [PATCH v5 07/16] kernel/cpu_pm: Add runtime PM support for CPUs Lina Iyer
2016-08-26 20:17 ` [PATCH v5 08/16] PM / cpu_domains: Setup PM domains for CPUs/clusters Lina Iyer
2016-08-26 20:17 ` [PATCH v5 09/16] PM / cpu_domains: Initialize CPU PM domains from DT Lina Iyer
2016-08-26 23:28 ` kbuild test robot
2016-08-26 20:17 ` [PATCH v5 10/16] timer: Export next wake up of a CPU Lina Iyer
2016-08-26 21:29 ` kbuild test robot
2016-08-26 20:17 ` [PATCH v5 11/16] PM / cpu_domains: Add PM Domain governor for CPUs Lina Iyer
2016-08-26 23:10 ` kbuild test robot
2016-08-26 20:17 ` [PATCH v5 12/16] doc / cpu_domains: Describe CPU PM domains setup and governor Lina Iyer
2016-08-26 20:17 ` [PATCH v5 13/16] drivers: firmware: psci: Allow OS Initiated suspend mode Lina Iyer
2016-08-26 20:17 ` [PATCH v5 14/16] drivers: firmware: psci: Support cluster idle states for OS-Initiated Lina Iyer
2016-08-26 20:17 ` [PATCH v5 15/16] dt/bindings: Add PSCI OS-Initiated PM Domains bindings Lina Iyer
2016-08-26 20:17 ` [PATCH v5 16/16] ARM64: dts: Define CPU power domain for MSM8916 Lina Iyer
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