[PATCH v5 03/16] tegra: fdt: Add pwm binding and node

[Simon Glass <sjg-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>]

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-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>
---
Changes in v5:
- Update Tegra PWM binding s/duty cycle/period/

Changes in v3:
- Add new commit for pwm binding and node

 arch/arm/dts/tegra20.dtsi                    |    7 +++++++
 doc/device-tree-bindings/pwm/tegra20-pwm.txt |   18 ++++++++++++++++++
 2 files changed, 25 insertions(+), 0 deletions(-)
 create mode 100644 doc/device-tree-bindings/pwm/tegra20-pwm.txt

diff --git a/arch/arm/dts/tegra20.dtsi b/arch/arm/dts/tegra20.dtsi
index d936b1e..3221bc9 100644
--- a/arch/arm/dts/tegra20.dtsi
+++ b/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>;
+	};
+
 };
diff --git a/doc/device-tree-bindings/pwm/tegra20-pwm.txt b/doc/device-tree-bindings/pwm/tegra20-pwm.txt
new file mode 100644
index 0000000..01438ec
--- /dev/null
+++ b/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>;
+	};
-- 
1.7.7.3