NXP LPC32xx has three interrupt controllers, namely root Main
Interrupt Controller (MIC) and two supplementary Sub Interrupt
Controllers (SIC1 and SIC2), four interrupt outputs from SIC1 and SIC2
are connected to MIC.
Also the change describes two additional optional properties:
* interrupt-controller-name - human readable name of an interrupt
controller,
* wakeup-sources - list of mappings between a hardware interrupt and
its correspondent wakeup source to exit CPU STOP mode.
Signed-off-by: Vladimir Zapolskiy <vz@xxxxxxxxx>
---
.../interrupt-controller/nxp,lpc3220-mic.txt | 99 ++++++++++++++++------
1 file changed, 75 insertions(+), 24 deletions(-)
diff --git a/Documentation/devicetree/bindings/interrupt-controller/nxp,lpc3220-mic.txt b/Documentation/devicetree/bindings/interrupt-controller/nxp,lpc3220-mic.txt
index 539adca..99e41ca 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/nxp,lpc3220-mic.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/nxp,lpc3220-mic.txt
@@ -1,38 +1,89 @@
-* NXP LPC32xx Main Interrupt Controller
- (MIC, including SIC1 and SIC2 secondary controllers)
+* NXP LPC32xx MIC, SIC1 and SIC2 Interrupt Controllers
Required properties:
-- compatible: Should be "nxp,lpc3220-mic"
-- interrupt-controller: Identifies the node as an interrupt controller.
-- interrupt-parent: Empty for the interrupt controller itself
-- #interrupt-cells: The number of cells to define the interrupts. Should be 2.
- The first cell is the IRQ number
- The second cell is used to specify mode:
- 1 = low-to-high edge triggered
- 2 = high-to-low edge triggered
- 4 = active high level-sensitive
- 8 = active low level-sensitive
- Default for internal sources should be set to 4 (active high).
-- reg: Should contain MIC registers location and length
+- compatible: "nxp,lpc3220-mic" or "nxp,lpc3220-sic".
+- reg: should contain IC registers location and length
+- interrupt-controller: identifies the node as an interrupt controller.
+- #interrupt-cells: the number of cells to define an interrupt, should be 2.
+ The first cell is the IRQ number, the second cell is used to specify
+ one of the supported modes:
+ IRQ_TYPE_EDGE_RISING = low-to-high edge triggered
+ IRQ_TYPE_EDGE_FALLING = high-to-low edge triggered
+ IRQ_TYPE_LEVEL_HIGH = active high level-sensitive
+ IRQ_TYPE_LEVEL_LOW = active low level-sensitive
+ Default for internal sources should be set to IRQ_TYPE_LEVEL_HIGH.
+
+Optional properties:
+- interrupt-parent: empty for MIC interrupt controller, link to parent
+ MIC interrupt controller for SIC1 and SIC2
+- interrupts: empty for MIC interrupt controller, cascaded MIC
+ hardware interrupts for SIC1 and SIC2
+- interrupt-controller-name: readable interrupt controller name
+- wakeup-sources: mapping of interrupts handled by the controller and
+ which may serve as a wakeup source.
Examples:
- /*
- * MIC
- */
+
+ /* LPC32xx MIC, SIC1 and SIC2 interrupt controllers */
mic: interrupt-controller@40008000 {
compatible = "nxp,lpc3220-mic";
+ reg = <0x40008000 0x4000>;
+ interrupt-controller;
+ interrupt-controller-name = "mic";
+ #interrupt-cells = <2>;
+
+ wakeup-sources = <&wakeup_int 7 29>,
+ <&wakeup_int 25 27>;
+ };
+
+ sic1: interrupt-controller@4000C000 {
+ compatible = "nxp,lpc3220-sic";
+ reg = <0x4000C000 0x4000>;
+ interrupt-controller;
+ interrupt-controller-name = "sic1";
+ #interrupt-cells = <2>;
+
+ interrupt-parent = <&mic>;
+ interrupts = <0 IRQ_TYPE_LEVEL_LOW>,
+ <30 IRQ_TYPE_LEVEL_LOW>;
+
+ wakeup-sources = <&wakeup_int 16 22>, <&wakeup_int 19 26>,
+ <&wakeup_int 20 25>, <&wakeup_int 21 31>,
+ <&wakeup_int 24 20>, <&wakeup_int 29 8>,
+ <&wakeup_int 30 6>, <&wakeup_int 31 7>,
+ <&wakeup_pin 25 4>;
+ };
+
+ sic2: interrupt-controller@40010000 {
+ compatible = "nxp,lpc3220-sic";
+ reg = <0x40010000 0x4000>;
interrupt-controller;
- interrupt-parent;
+ interrupt-controller-name = "sic2";
#interrupt-cells = <2>;
- reg = <0x40008000 0xC000>;
+
+ interrupt-parent = <&mic>;
+ interrupts = <1 IRQ_TYPE_LEVEL_LOW>,
+ <31 IRQ_TYPE_LEVEL_LOW>;
+
+ wakeup-sources = <&wakeup_int 0 0>, <&wakeup_int 1 1>,
+ <&wakeup_int 2 2>, <&wakeup_int 3 3>,
+ <&wakeup_int 4 4>, <&wakeup_int 5 5>,
+ <&wakeup_int 6 8>, <&wakeup_pin 3 9>,
+ <&wakeup_pin 4 10>, <&wakeup_pin 5 11>,
+ <&wakeup_pin 6 6>, <&wakeup_pin 7 15>,
+ <&wakeup_pin 8 20>, <&wakeup_pin 9 31>,
+ <&wakeup_pin 10 22>, <&wakeup_pin 11 23>,
+ <&wakeup_pin 12 24>, <&wakeup_pin 13 25>,
+ <&wakeup_pin 14 26>, <&wakeup_pin 15 27>,
+ <&wakeup_pin 16 27>, <&wakeup_pin 18 18>,
+ <&wakeup_pin 23 7>, <&wakeup_pin 26 19>,
+ <&wakeup_pin 30 12>;
};
- /*
- * ADC
- */
+ /* ADC */
adc@40048000 {
compatible = "nxp,lpc3220-adc";
reg = <0x40048000 0x1000>;
- interrupt-parent = <&mic>;
- interrupts = <39 4>;
+ interrupt-parent = <&sic1>;
+ interrupts = <7 IRQ_TYPE_LEVEL_HIGH>;
};
--
2.1.4
--
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