ARM: tegra: define DT bindings for and instantiate timer

The Tegra timer provides a number of 29-bit timer channels, a single
32-bit free running counter, and in the Tegra30 variant, 5 watchdog modules.
The first two channels may also trigger a legacy watchdog reset.

Define a DT binding for this HW module, and add the module into the Tegra
device tree files.

Signed-off-by: Stephen Warren <swarren@nvidia.com>

4 files changed, 64 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/timer/nvidia,tegra20-timer.txt b/Documentation/devicetree/bindings/timer/nvidia,tegra20-timer.txt
new file mode 100644
index 00000000000..e019fdc3877
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/nvidia,tegra20-timer.txt
@@ -0,0 +1,21 @@
+NVIDIA Tegra20 timer
+
+The Tegra20 timer provides four 29-bit timer channels and a single 32-bit free
+running counter. The first two channels may also trigger a watchdog reset.
+
+Required properties:
+
+- compatible : should be "nvidia,tegra20-timer".
+- reg : Specifies base physical address and size of the registers.
+- interrupts : A list of 4 interrupts; one per timer channel.
+
+Example:
+
+timer {
+        compatible = "nvidia,tegra20-timer";
+        reg = <0x60005000 0x60>;
+        interrupts = <0 0 0x04
+                        0 1 0x04
+                        0 41 0x04
+                        0 42 0x04>;
+};
diff --git a/Documentation/devicetree/bindings/timer/nvidia,tegra30-timer.txt b/Documentation/devicetree/bindings/timer/nvidia,tegra30-timer.txt
new file mode 100644
index 00000000000..906109d4c59
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/nvidia,tegra30-timer.txt
@@ -0,0 +1,23 @@
+NVIDIA Tegra30 timer
+
+The Tegra30 timer provides ten 29-bit timer channels, a single 32-bit free
+running counter, and 5 watchdog modules. The first two channels may also
+trigger a legacy watchdog reset.
+
+Required properties:
+
+- compatible : should be "nvidia,tegra30-timer", "nvidia,tegra20-timer".
+- reg : Specifies base physical address and size of the registers.
+- interrupts : A list of 6 interrupts; one per each of timer channels 1
+    through 5, and one for the shared interrupt for the remaining channels.
+
+timer {
+        compatible = "nvidia,tegra30-timer", "nvidia,tegra20-timer";
+        reg = <0x60005000 0x400>;
+        interrupts = <0 0 0x04
+                      0 1 0x04
+                      0 41 0x04
+                      0 42 0x04
+                      0 121 0x04
+                      0 122 0x04>;
+};
diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index fba998e3954..96c922d8bb3 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -108,6 +108,15 @@
                 #interrupt-cells = <3>;
         };
 
+        timer@60005000 {
+                compatible = "nvidia,tegra20-timer";
+                reg = <0x60005000 0x60>;
+                interrupts = <0 0 0x04
+                              0 1 0x04
+                              0 41 0x04
+                              0 42 0x04>;
+        };
+
         apbdma: dma {
                 compatible = "nvidia,tegra20-apbdma";
                 reg = <0x6000a000 0x1200>;
diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index 1f7f49aabe6..48a8320ebf0 100644
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -108,6 +108,17 @@
                 #interrupt-cells = <3>;
         };
 
+        timer@60005000 {
+                compatible = "nvidia,tegra30-timer", "nvidia,tegra20-timer";
+                reg = <0x60005000 0x400>;
+                interrupts = <0 0 0x04
+                              0 1 0x04
+                              0 41 0x04
+                              0 42 0x04
+                              0 121 0x04
+                              0 122 0x04>;
+        };
+
         apbdma: dma {
                 compatible = "nvidia,tegra30-apbdma", "nvidia,tegra20-apbdma";
                 reg = <0x6000a000 0x1400>;