Document clock bindings for pmc clocks clk_out_1, clk_out_2 and clk_out_3.
These clocks are part of Tegra PMC block and pmc node is the provider for
these clocks.
Signed-off-by: Sowjanya Komatineni <skomatineni@xxxxxxxxxx>
---
.../bindings/arm/tegra/nvidia,tegra186-pmc.txt | 44 ++++++++++++++++++++++
1 file changed, 44 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra186-pmc.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra186-pmc.txt
index 2d89cdc39eb0..4576de92e4cc 100644
--- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra186-pmc.txt
+++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra186-pmc.txt
@@ -12,6 +12,10 @@ Required properties:
- "aotag"
- "scratch"
- "misc" (Only for Tegra194)
+- #clock-cells : Should be 1 for Tegra30 and higher.
+ In clock consumers, this cell represents the PMC clock ID.
+ The assignments may be found in header file
+ <dt-bindings/soc/tegra-pmc.h>.
Optional properties:
- nvidia,invert-interrupt: If present, inverts the PMU interrupt signal.
@@ -130,3 +134,43 @@ Pinctrl client example:
pinctrl-1 = <&hdmi_on>;
pinctrl-names = "hdmi-on", "hdmi-off";
};
+
+== Clock Control ==
+
+Tegra PMC has 3 clocks clk_1, clk_2 and clk_3. Each of these clocks has
+source selection and enable/disable gate.
+Parent/source for these clocks can be either of clk_m, clk_m_div2, clk_m_div4,
+or extern clock from Tegra CAR module.
+
+Clock configuration example:
+ pmc: pmc@7000e400 {
+ compatible = "nvidia,tegra186-pmc";
+ reg = <0 0x0c360000 0 0x10000>,
+ <0 0x0c370000 0 0x10000>,
+ <0 0x0c380000 0 0x10000>,
+ <0 0x0c390000 0 0x10000>;
+ reg-names = "pmc", "wake", "aotag", "scratch";
+ ...
+ #clock-cells = <1>;
+ ...
+ };
+
+Clock consumer example:
+ host1x@50000000 {
+ ...
+ vi@54080000 {
+ ...
+ assigned-clocks = <&pmc TEGRA_PMC_CLK_OUT_3_MUX>;
+ assigned-clock-parents = <&tegra_car TEGRA210_CLK_EXTERN3>;
+ };
+ ...
+ };
+ ...
+ i2c@7000c500 {
+ cam_sensor {
+ ...
+ clocks = <&pmc TEGRA_PMC_CLK_OUT_3>;
+ clock-names = "mclk";
+ ...
+ };
+ };
--
2.7.4
