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[media] DocBook: add dvb_math.h to documentation 

There are already some comments at dvb_math.h that are ready
for DocBook, although not properly formatted.

Convert them, fix some issues and add this file to
the device-drivers DocBook.

Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mauro Carvalho Chehab 2015-08-22 07:37:28 -03:00
parent 4f1c1868e8
commit e08bb6f79f
2 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/DocBook/device-drivers.tmpl
View File

@ -229,6 +229,7 @@ X!Isound/sound_firmware.c
!Iinclude/media/rc-core.h
!Idrivers/media/dvb-core/dvb_ca_en50221.h
!Idrivers/media/dvb-core/dvb_frontend.h
!Idrivers/media/dvb-core/dvb_math.h
<!-- FIXME: Removed for now due to document generation inconsistency
X!Iinclude/media/v4l2-ctrls.h
X!Iinclude/media/v4l2-dv-timings.h
@ -241,7 +242,6 @@ X!Edrivers/media/dvb-core/dvb_demux.c
X!Idrivers/media/dvb-core/dvbdev.h
X!Edrivers/media/dvb-core/dvb_net.c
X!Idrivers/media/dvb-core/dvb_ringbuffer.h
X!Idrivers/media/dvb-core/dvb_math.h
-->
</chapter>

15
drivers/media/dvb-core/dvb_math.h
View File

@ -25,7 +25,9 @@
#include <linux/types.h>
/**
* computes log2 of a value; the result is shifted left by 24 bits
* cintlog2 - computes log2 of a value; the result is shifted left by 24 bits
*
* @value: The value (must be != 0)
*
* to use rational values you can use the following method:
* intlog2(value) = intlog2(value * 2^x) - x * 2^24
@ -35,13 +37,15 @@
* intlog2(9) will give 3 << 24 + ... = 3.16... * 2^24
* intlog2(1.5) = intlog2(3) - 2^24 = 0.584... * 2^24
*
* @param value The value (must be != 0)
* @return log2(value) * 2^24
*
* return: log2(value) * 2^24
*/
extern unsigned int intlog2(u32 value);
/**
* computes log10 of a value; the result is shifted left by 24 bits
* intlog10 - computes log10 of a value; the result is shifted left by 24 bits
*
* @value: The value (must be != 0)
*
* to use rational values you can use the following method:
* intlog10(value) = intlog10(value * 10^x) - x * 2^24
@ -52,8 +56,7 @@ extern unsigned int intlog2(u32 value);
*
* look at intlog2 for similar examples
*
* @param value The value (must be != 0)
* @return log10(value) * 2^24
* return: log10(value) * 2^24
*/
extern unsigned int intlog10(u32 value);