dm: sandbox: pwm: Add a basic pwm test

Unfortunately a test for the PWM uclass was not included when it was
submitted. This was noticed when trying to add more functionality:

   http://patchwork.ozlabs.org/patch/748172/

Add a simple test to get us started.

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/arch/sandbox/dts/test.dts b/arch/sandbox/dts/test.dts
index fff175d1b7..50bcdebf74 100644
--- a/arch/sandbox/dts/test.dts
+++ b/arch/sandbox/dts/test.dts
@@ -272,6 +272,14 @@
 		power-domains = <&pwrdom 2>;
 	};
 
+	pwm {
+		compatible = "sandbox,pwm";
+	};
+
+	pwm2 {
+		compatible = "sandbox,pwm";
+	};
+
 	ram {
 		compatible = "sandbox,ram";
 	};