summaryrefslogtreecommitdiff
path: root/Documentation/devicetree/bindings/timer/samsung,exynos4210-mct.yaml
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/timer/samsung,exynos4210-mct.yaml')
-rw-r--r--Documentation/devicetree/bindings/timer/samsung,exynos4210-mct.yaml124
1 files changed, 124 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/timer/samsung,exynos4210-mct.yaml b/Documentation/devicetree/bindings/timer/samsung,exynos4210-mct.yaml
new file mode 100644
index 000000000000..273e359854dd
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/samsung,exynos4210-mct.yaml
@@ -0,0 +1,124 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/samsung,exynos4210-mct.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Exynos SoC Multi Core Timer (MCT)
+
+maintainers:
+ - Krzysztof Kozlowski <krzk@kernel.org>
+
+description: |+
+ The Samsung's Multi Core Timer (MCT) module includes two main blocks, the
+ global timer and CPU local timers. The global timer is a 64-bit free running
+ up-counter and can generate 4 interrupts when the counter reaches one of the
+ four preset counter values. The CPU local timers are 32-bit free running
+ down-counters and generate an interrupt when the counter expires. There is
+ one CPU local timer instantiated in MCT for every CPU in the system.
+
+properties:
+ compatible:
+ enum:
+ - samsung,exynos4210-mct
+ - samsung,exynos4412-mct
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ description: |
+ Interrupts should be put in specific order. This is, the local timer
+ interrupts should be specified after the four global timer interrupts
+ have been specified:
+ 0: Global Timer Interrupt 0
+ 1: Global Timer Interrupt 1
+ 2: Global Timer Interrupt 2
+ 3: Global Timer Interrupt 3
+ 4: Local Timer Interrupt 0
+ 5: Local Timer Interrupt 1
+ 6: ..
+ 7: ..
+ i: Local Timer Interrupt n
+ For MCT block that uses a per-processor interrupt for local timers, such
+ as ones compatible with "samsung,exynos4412-mct", only one local timer
+ interrupt might be specified, meaning that all local timers use the same
+ per processor interrupt.
+ minItems: 5 # 4 Global + 1 local
+ maxItems: 20 # 4 Global + 16 local
+
+required:
+ - compatible
+ - interrupts
+ - reg
+
+examples:
+ - |
+ // In this example, the IP contains two local timers, using separate
+ // interrupts, so two local timer interrupts have been specified,
+ // in addition to four global timer interrupts.
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ timer@10050000 {
+ compatible = "samsung,exynos4210-mct";
+ reg = <0x10050000 0x800>;
+ interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
+ };
+
+ - |
+ // In this example, the timer interrupts are connected to two separate
+ // interrupt controllers. Hence, an interrupts-extended is needed.
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ timer@101c0000 {
+ compatible = "samsung,exynos4210-mct";
+ reg = <0x101C0000 0x800>;
+ interrupts-extended = <&gic GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+ <&gic GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>,
+ <&combiner 12 6>,
+ <&combiner 12 7>,
+ <&gic GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>,
+ <&gic GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
+ };
+
+ - |
+ // In this example, the IP contains four local timers, but using
+ // a per-processor interrupt to handle them. Only one first local
+ // interrupt is specified.
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ timer@10050000 {
+ compatible = "samsung,exynos4412-mct";
+ reg = <0x10050000 0x800>;
+
+ interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_PPI 42 IRQ_TYPE_LEVEL_HIGH>;
+ };
+
+ - |
+ // In this example, the IP contains four local timers, but using
+ // a per-processor interrupt to handle them. All the local timer
+ // interrupts are specified.
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ timer@10050000 {
+ compatible = "samsung,exynos4412-mct";
+ reg = <0x10050000 0x800>;
+
+ interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_PPI 42 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_PPI 42 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_PPI 42 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_PPI 42 IRQ_TYPE_LEVEL_HIGH>;
+ };