diff --git a/dts/Bindings/cpufreq/cpufreq-cpu0.txt b/dts/Bindings/cpufreq/cpufreq-cpu0.txt
index f055515..366690c 100644
--- a/dts/Bindings/cpufreq/cpufreq-cpu0.txt
+++ b/dts/Bindings/cpufreq/cpufreq-cpu0.txt
@@ -8,10 +8,12 @@
 under node /cpus/cpu@0.
 
 Required properties:
-- operating-points: Refer to Documentation/devicetree/bindings/power/opp.txt
-  for details
+- None
 
 Optional properties:
+- operating-points: Refer to Documentation/devicetree/bindings/power/opp.txt for
+  details. OPPs *must* be supplied either via DT, i.e. this property, or
+  populated at runtime.
 - clock-latency: Specify the possible maximum transition latency for clock,
   in unit of nanoseconds.
 - voltage-tolerance: Specify the CPU voltage tolerance in percentage.
diff --git a/dts/src/arm/at91sam9n12.dtsi b/dts/src/arm/at91sam9n12.dtsi
index 2877959..b84bac5 100644
--- a/dts/src/arm/at91sam9n12.dtsi
+++ b/dts/src/arm/at91sam9n12.dtsi
@@ -925,7 +925,7 @@
 			compatible = "atmel,at91rm9200-ohci", "usb-ohci";
 			reg = <0x00500000 0x00100000>;
 			interrupts = <22 IRQ_TYPE_LEVEL_HIGH 2>;
-			clocks = <&usb>, <&uhphs_clk>, <&udphs_clk>,
+			clocks = <&usb>, <&uhphs_clk>, <&uhphs_clk>,
 				 <&uhpck>;
 			clock-names = "usb_clk", "ohci_clk", "hclk", "uhpck";
 			status = "disabled";
diff --git a/dts/src/arm/at91sam9x5.dtsi b/dts/src/arm/at91sam9x5.dtsi
index 2ebc421..2c0d6ea 100644
--- a/dts/src/arm/at91sam9x5.dtsi
+++ b/dts/src/arm/at91sam9x5.dtsi
@@ -1124,6 +1124,7 @@
 				compatible = "atmel,at91sam9rl-pwm";
 				reg = <0xf8034000 0x300>;
 				interrupts = <18 IRQ_TYPE_LEVEL_HIGH 4>;
+				clocks = <&pwm_clk>;
 				#pwm-cells = <3>;
 				status = "disabled";
 			};
@@ -1155,8 +1156,7 @@
 			compatible = "atmel,at91rm9200-ohci", "usb-ohci";
 			reg = <0x00600000 0x100000>;
 			interrupts = <22 IRQ_TYPE_LEVEL_HIGH 2>;
-			clocks = <&usb>, <&uhphs_clk>, <&udphs_clk>,
-				 <&uhpck>;
+			clocks = <&usb>, <&uhphs_clk>, <&uhphs_clk>, <&uhpck>;
 			clock-names = "usb_clk", "ohci_clk", "hclk", "uhpck";
 			status = "disabled";
 		};