From: Derek Basehore <dbasehore@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Soby.Mathew@arm.com, sudeep.holla@arm.com,
devicetree@vger.kernel.org, robh+dt@kernel.org,
mark.rutland@arm.com, linux-pm@vger.kernel.org,
rafael.j.wysocki@intel.com, tglx@linutronix.de,
briannorris@chromium.org, marc.zyngier@arm.com,
Derek Basehore <dbasehore@chromium.org>
Subject: [PATCH v7 2/3] DT/arm,gic-v3-its: add reset-on-suspend property
Date: Wed, 28 Feb 2018 21:48:19 -0800 [thread overview]
Message-ID: <20180301054820.42847-3-dbasehore@chromium.org> (raw)
In-Reply-To: <20180301054820.42847-1-dbasehore@chromium.org>
This adds documentation for the new reset-on-suspend property. This
property enables saving and restoring the ITS for when it loses state
in system suspend.
Signed-off-by: Derek Basehore <dbasehore@chromium.org>
---
.../devicetree/bindings/interrupt-controller/arm,gic-v3.txt | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
index 0a57f2f4167d..dfd1b9b838cd 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
@@ -78,6 +78,11 @@ These nodes must have the following properties:
Optional:
- socionext,synquacer-pre-its: (u32, u32) tuple describing the untranslated
address and size of the pre-ITS window.
+- reset-on-suspend: Boolean property. Indicates that the ITS loses power
+ on suspend to memory (via PSCI_SYSTEM_SUSPEND). Registers and data within
+ the ITS will be the same as before probe (PSCI FW does not restore state).
+ Any state stored in external memory is maintained (such as collection
+ tables stored in external memory).
The main GIC node must contain the appropriate #address-cells,
#size-cells and ranges properties for the reg property of all ITS
--
2.16.2.395.g2e18187dfd-goog
next prev parent reply other threads:[~2018-03-01 5:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-01 5:48 [PATCH v7 0/3] GICv3 Save and Restore Derek Basehore
2018-03-01 5:48 ` [PATCH v7 1/3] irqchip/gic-v3-its: add ability to save/restore ITS state Derek Basehore
2018-03-01 11:41 ` Mark Rutland
2018-03-01 12:29 ` Marc Zyngier
2018-03-02 2:08 ` dbasehore .
2018-03-14 10:22 ` Marc Zyngier
2018-03-14 21:44 ` dbasehore .
2018-03-15 3:04 ` dbasehore .
2018-03-15 9:26 ` Marc Zyngier
2018-03-01 5:48 ` Derek Basehore [this message]
2018-03-01 11:34 ` [PATCH v7 2/3] DT/arm,gic-v3-its: add reset-on-suspend property Mark Rutland
2018-03-01 5:48 ` [PATCH v7 3/3] irqchip/gic-v3-its: add ability to resend MAPC on resume Derek Basehore
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