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Subject[PATCH 5/8] DT/arm,gic-v3: add save-suspend-state property
Date
This adds documentation for the new save-suspend-state property. This
property enables saving and restoring the GIC for when it loses state
in system suspend.

Change-Id: I9ad34baed04475c6ef1562bc0f72ad5d348f9904
Signed-off-by: Derek Basehore <dbasehore@chromium.org>
---
.../bindings/interrupt-controller/arm,gic-v3.txt | 36 ++++++++++++++++++++++
1 file changed, 36 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..820556a8ffd2 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.txt
@@ -57,6 +57,10 @@ Optional
occupied by the redistributors. Required if more than one such
region is present.

+- save-suspend-state : Bool property. Setting this has the kernel save
+ and restore the GIC state for suspend and resume respectively. For
+ when the GIC loses power during suspend.
+
Sub-nodes:

PPI affinity can be expressed as a single "ppi-partitions" node,
@@ -107,6 +111,38 @@ Examples:
};
};

+ gic: interrupt-controller@fee00000 {
+ compatible = "arm,gic-v3";
+ #interrupt-cells = <4>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+ interrupt-controller;
+ save-suspend-state;
+
+ reg = <0x0 0xfee00000 0 0x10000>, /* GICD */
+ <0x0 0xfef00000 0 0xc0000>, /* GICR */
+ <0x0 0xfff00000 0 0x10000>, /* GICC */
+ <0x0 0xfff10000 0 0x10000>, /* GICH */
+ <0x0 0xfff20000 0 0x10000>; /* GICV */
+ interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH 0>;
+ its: interrupt-controller@fee20000 {
+ compatible = "arm,gic-v3-its";
+ msi-controller;
+ reg = <0x0 0xfee20000 0x0 0x20000>;
+ };
+
+ ppi-partitions {
+ ppi_cluster0: interrupt-partition-0 {
+ affinity = <&cpu_l0 &cpu_l1 &cpu_l2 &cpu_l3>;
+ };
+
+ ppi_cluster1: interrupt-partition-1 {
+ affinity = <&cpu_b0 &cpu_b1>;
+ };
+ };
+ };
+
gic: interrupt-controller@2c010000 {
compatible = "arm,gic-v3";
#interrupt-cells = <4>;
--
2.16.0.rc1.238.g530d649a79-goog
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