X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=Documentation%2Fdevicetree%2Fbindings%2Fiio%2Fadc%2Fvf610-adc.txt;h=1aad0514e6474be4171e854ae5265d872cc7c89c;hb=edc837da4b54a01ba6fa3c29b411e35d1a8430ca;hp=3eb40e20c1433753c355efe147137b2748e60ac4;hpb=acea568fa9eaeffbf949d15b2f7c9c346e16aae3;p=firefly-linux-kernel-4.4.55.git

diff --git a/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt b/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt
index 3eb40e20c143..1aad0514e647 100644
--- a/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt
+++ b/Documentation/devicetree/bindings/iio/adc/vf610-adc.txt
@@ -17,6 +17,11 @@ Recommended properties:
   - Frequency in normal mode (ADLPC=0, ADHSC=0)
   - Frequency in high-speed mode (ADLPC=0, ADHSC=1)
   - Frequency in low-power mode (ADLPC=1, ADHSC=0)
+- min-sample-time: Minimum sampling time in nanoseconds. This value has
+  to be chosen according to the conversion mode and the connected analog
+  source resistance (R_as) and capacitance (C_as). Refer the datasheet's
+  operating requirements. A safe default across a wide range of R_as and
+  C_as as well as conversion modes is 1000ns.
 
 Example:
 adc0: adc@4003b000 {