x86: add force_hpet boot option

[mv-sheeva.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 189df0bcab99bfa1dfdeff83c1fd8d67a7fe83d3..c6859b94aaa7cbda6db38edf5e1f05a653e764d3 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -431,8 +431,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        over the 8254 in addition to over the IO-APIC. The
                        kernel tries to set a sensible default.
 
-       hpet=           [X86-32,HPET] option to disable HPET and use PIT.
-                       Format: disable
+       hpet=           [X86-32,HPET] option to control HPET usage
+                       Format: { enable (default) | disable | force }
+                       disable: disable HPET and use PIT instead
+                       force: allow force enabled of undocumented chips (ICH4, VIA)
 
        com20020=       [HW,NET] ARCnet - COM20020 chipset
                        Format: