[PATCH 1/6] dt-bindings: timer: Add Tegra186 & Tegra234 Timer

[Kartik <kkartik@nvidia.com>]

The Tegra186 timer provides ten 29-bit timer counters and one 32-bit
timestamp counter. The Tegra234 timer provides sixteen 29-bit timer
counters and one 32-bit timestamp counter. Each NV timer selects its
timing reference signal from the 1 MHz reference generated by USEC,
TSC or either clk_m or OSC. Each TMR can be programmed to generate
one-shot, periodic, or watchdog interrupts.

Signed-off-by: Kartik <kkartik@nvidia.com>
---
 .../bindings/timer/nvidia,tegra186-timer.yaml | 116 ++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/nvidia,tegra186-timer.yaml

diff --git a/Documentation/devicetree/bindings/timer/nvidia,tegra186-timer.yaml b/Documentation/devicetree/bindings/timer/nvidia,tegra186-timer.yaml
new file mode 100644
index 000000000000..7841a68d19f3
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/nvidia,tegra186-timer.yaml
@@ -0,0 +1,116 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/timer/nvidia,tegra186-timer.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: NVIDIA Tegra186 timer
+
+maintainers:
+  - Thierry Reding <treding@nvidia.com>
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: nvidia,tegra186-timer
+    then:
+      properties:
+        interrupts:
+          # Either a single combined interrupt or up to 14 individual interrupts
+          minItems: 1
+          maxItems: 10
+          description: >
+            A list of 10 interrupts; one per each timer channels 0 through 9.
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: nvidia,tegra234-timer
+    then:
+      properties:
+        interrupts:
+          # Either a single combined interrupt or up to 16 individual interrupts
+          minItems: 1
+          maxItems: 16
+          description: >
+            A list of 16 interrupts; one per each timer channels 0 through 15.
+
+properties:
+  compatible:
+    oneOf:
+      - const: nvidia,tegra186-timer
+        description: >
+          The Tegra186 timer provides ten 29-bit timer counters and one 32-bit
+          timestamp counter. Each NV timer selects its timing reference signal
+          from the 1 MHz reference generated by USEC, TSC or either clk_m or
+          OSC. Each TMR can be programmed to generate one-shot, periodic, or
+          watchdog interrupts.
+      - const: nvidia,tegra234-timer
+        description: >
+          The Tegra234 timer provides sixteen 29-bit timer counters and one 32-bit
+          timestamp counter. Each NV timer selects its timing reference signal
+          from the 1 MHz reference generated by USEC, TSC or either clk_m or
+          OSC. Each TMR can be programmed to generate one-shot, periodic, or
+          watchdog interrupts.
+
+  reg:
+    maxItems: 1
+
+  interrupts: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    timer@3010000 {
+        compatible = "nvidia,tegra186-timer";
+        reg = <0x03010000 0x000e0000>;
+        interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
+        status = "disabled";
+    };
+
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    timer@2080000 {
+        compatible = "nvidia,tegra234-timer";
+        reg = <0x02080000 0x00121000>;
+        interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>,
+                     <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>;
+        status = "disabled";
+    };
-- 
2.17.1