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tegra: fdt: Add pwm binding and node

This binding will apparently soon be in linux-next. Bring it in now
since we need to do something, and may as well try to target what
Linux will have.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Simon Glass 11 years ago
parent
commit
beca1fdeff
2 changed files with 25 additions and 0 deletions
  1. 7 0
      arch/arm/dts/tegra20.dtsi
  2. 18 0
      doc/device-tree-bindings/pwm/tegra20-pwm.txt

+ 7 - 0
arch/arm/dts/tegra20.dtsi

@@ -211,4 +211,11 @@
 		compatible = "nvidia,tegra20-nand";
 		reg = <0x70008000 0x100>;
 	};
+
+	pwm: pwm@7000a000 {
+		compatible = "nvidia,tegra20-pwm";
+		reg = <0x7000a000 0x100>;
+		#pwm-cells = <2>;
+	};
+
 };

+ 18 - 0
doc/device-tree-bindings/pwm/tegra20-pwm.txt

@@ -0,0 +1,18 @@
+Tegra SoC PWFM controller
+
+Required properties:
+- compatible: should be one of:
+  - "nvidia,tegra20-pwm"
+  - "nvidia,tegra30-pwm"
+- reg: physical base address and length of the controller's registers
+- #pwm-cells: On Tegra the number of cells used to specify a PWM is 2. The
+  first cell specifies the per-chip index of the PWM to use and the second
+  cell is the period in nanoseconds.
+
+Example:
+
+	pwm: pwm@7000a000 {
+		compatible = "nvidia,tegra20-pwm";
+		reg = <0x7000a000 0x100>;
+		#pwm-cells = <2>;
+	};