1 files changed, 11 insertions, 0 deletions
diff --git a/flashrom.8 b/flashrom.8
index c29da74..9fb2f55 100644
--- a/flashrom.8
+++ b/flashrom.8
@@ -549,6 +549,17 @@ The default model is
 .B 4232H
 and the default interface is
 .BR B .
+.sp
+All models supported by the ft2232_spi driver can configure the SPI clock rate by setting a divisor. The
+expressible divisors are all even numbers between 2 and 2^17 (=131072) resulting in SPI clock frequencies of
+6 MHz down to about 92 Hz for 12 MHz inputs. The default divisor is set to 2, but you can use another one by
+specifying the optional
+.B divisor
+parameter with the
+.sp
+.B "  flashrom \-p ft2232_spi:divisor=div"
+.sp
+syntax.
 .SS
 .BR "serprog " programmer
 A mandatory parameter specifies either a serial