1 files changed, 12 insertions, 1 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index d1b082772e39..be3bde51b564 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -836,6 +836,12 @@ and is between 256 and 4096 characters. It is defined in the file
                                If specified, z/VM IUCV HVC accepts connections
                                from listed z/VM user IDs only.
 
+        i2c_bus=        [HW] Override the default board specific I2C bus speed
+                             or register an additional I2C bus that is not
+                             registered from board initialization code.
+                             Format:
+                             <bus_id>,<clkrate>
+
         i8042.debug     [HW] Toggle i8042 debug mode
         i8042.direct    [HW] Put keyboard port into non-translated mode
         i8042.dumbkbd   [HW] Pretend that controller can only read data from
@@ -1325,8 +1331,13 @@ and is between 256 and 4096 characters. It is defined in the file
 
         memtest=        [KNL,X86] Enable memtest
                         Format: <integer>
-                        range: 0,4 : pattern number
                         default : 0 <disable>
+                        Specifies the number of memtest passes to be
+                        performed. Each pass selects another test
+                        pattern from a given set of patterns. Memtest
+                        fills the memory with this pattern, validates
+                        memory contents and reserves bad memory
+                        regions that are detected.
 
         meye.*=         [HW] Set MotionEye Camera parameters
                         See Documentation/video4linux/meye.txt.