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authorRandy Dunlap <rdunlap@xenotime.net>2005-11-07 04:01:06 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 10:53:55 -0500
commit8a0d4900697f2d615a77cd99585e743c1af555a3 (patch)
tree6b8a6affe8b79df52781199cd84a4d98adf2564d
parent8f2709b542c96a2b1910ca5f2fe27dc9023b1225 (diff)
[PATCH] Doc/hpet.txt: change to < 80 columns
Put text into < 80 columns. No other changes. Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--Documentation/hpet.txt34
1 files changed, 18 insertions, 16 deletions
diff --git a/Documentation/hpet.txt b/Documentation/hpet.txt
index 4e7cc8d3359b..e52457581f47 100644
--- a/Documentation/hpet.txt
+++ b/Documentation/hpet.txt
@@ -1,18 +1,21 @@
1 High Precision Event Timer Driver for Linux 1 High Precision Event Timer Driver for Linux
2 2
3The High Precision Event Timer (HPET) hardware is the future replacement for the 8254 and Real 3The High Precision Event Timer (HPET) hardware is the future replacement
4Time Clock (RTC) periodic timer functionality. Each HPET can have up two 32 timers. It is possible 4for the 8254 and Real Time Clock (RTC) periodic timer functionality.
5to configure the first two timers as legacy replacements for 8254 and RTC periodic. A specification 5Each HPET can have up two 32 timers. It is possible to configure the
6done by INTEL and Microsoft can be found at http://www.intel.com/labs/platcomp/hpet/hpetspec.htm. 6first two timers as legacy replacements for 8254 and RTC periodic timers.
7 7A specification done by Intel and Microsoft can be found at
8The driver supports detection of HPET driver allocation and initialization of the HPET before the 8<http://www.intel.com/hardwaredesign/hpetspec.htm>.
9driver module_init routine is called. This enables platform code which uses timer 0 or 1 as the 9
10main timer to intercept HPET initialization. An example of this initialization can be found in 10The driver supports detection of HPET driver allocation and initialization
11of the HPET before the driver module_init routine is called. This enables
12platform code which uses timer 0 or 1 as the main timer to intercept HPET
13initialization. An example of this initialization can be found in
11arch/i386/kernel/time_hpet.c. 14arch/i386/kernel/time_hpet.c.
12 15
13The driver provides two APIs which are very similar to the API found in the rtc.c driver. 16The driver provides two APIs which are very similar to the API found in
14There is a user space API and a kernel space API. An example user space program is provided 17the rtc.c driver. There is a user space API and a kernel space API.
15below. 18An example user space program is provided below.
16 19
17#include <stdio.h> 20#include <stdio.h>
18#include <stdlib.h> 21#include <stdlib.h>
@@ -290,9 +293,8 @@ The kernel API has three interfaces exported from the driver:
290 hpet_unregister(struct hpet_task *tp) 293 hpet_unregister(struct hpet_task *tp)
291 hpet_control(struct hpet_task *tp, unsigned int cmd, unsigned long arg) 294 hpet_control(struct hpet_task *tp, unsigned int cmd, unsigned long arg)
292 295
293The kernel module using this interface fills in the ht_func and ht_data members of the 296The kernel module using this interface fills in the ht_func and ht_data
294hpet_task structure before calling hpet_register. hpet_control simply vectors to the hpet_ioctl 297members of the hpet_task structure before calling hpet_register.
295routine and has the same commands and respective arguments as the user API. hpet_unregister 298hpet_control simply vectors to the hpet_ioctl routine and has the same
299commands and respective arguments as the user API. hpet_unregister
296is used to terminate usage of the HPET timer reserved by hpet_register. 300is used to terminate usage of the HPET timer reserved by hpet_register.
297
298