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[v2,4/6] dt-bindings: cp110: document the thermal interrupt capabilities

Message ID 20181123161730.11289-5-miquel.raynal@bootlin.com (mailing list archive)
State New, archived
Headers show
Series Add hw overheat IRQ support to Marvell thermal driver | expand

Commit Message

Miquel Raynal Nov. 23, 2018, 4:17 p.m. UTC
The thermal IP can produce interrupts on overheat situation.
Describe them.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
 .../bindings/arm/marvell/cp110-system-controller.txt     | 9 +++++++++
 1 file changed, 9 insertions(+)
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diff --git a/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller.txt b/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller.txt
index 81ce742d2760..4db4119a6d19 100644
--- a/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller.txt
+++ b/Documentation/devicetree/bindings/arm/marvell/cp110-system-controller.txt
@@ -199,6 +199,9 @@  Thermal:
 The thermal IP can probe the temperature all around the processor. It
 may feature several channels, each of them wired to one sensor.
+It is possible to setup an overheat interrupt by giving at least one
+critical point to any subnode of the thermal-zone node.
 For common binding part and usage, refer to
@@ -208,6 +211,11 @@  Required properties:
 - reg: register range associated with the thermal functions.
 Optional properties:
+- interrupts-extended: overheat interrupt handle. Should point to
+  a line of the ICU-SEI irqchip (116 is what is usually used by the
+  firmware). The ICU-SEI will redirect towards interrupt line #37 of the
+  AP SEI which is shared across all CPs.
+  See interrupt-controller/interrupts.txt
 - #thermal-sensor-cells: shall be <1> when thermal-zones subnodes refer
   to this IP and represents the channel ID. There is one sensor per
   channel. O refers to the thermal IP internal channel.
@@ -220,6 +228,7 @@  CP110_LABEL(syscon1): system-controller@6f8000 {
 	CP110_LABEL(thermal): thermal-sensor@70 {
 		compatible = "marvell,armada-cp110-thermal";
 		reg = <0x70 0x10>;
+		interrupts-extended = <&CP110_LABEL(icu_sei) 116 IRQ_TYPE_LEVEL_HIGH>;
 		#thermal-sensor-cells = <1>;