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lib/math: Move dvb_math.c into lib/math/int_log.c 

Some existing and new users may benefit from the intlog2() and
intlog10() APIs, make them wide available.

Reviewed-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Acked-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Link: https://lore.kernel.org/r/20230619172019.21457-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20230703135211.87416-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andy Shevchenko 2023-07-03 16:52:08 +03:00 committed by Mark Brown
parent 3d74f42c56
commit f97fa3dcb2
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
32 changed files with 42 additions and 48 deletions
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7
Documentation/core-api/kernel-api.rst
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@ -162,8 +162,11 @@ Base 2 log and power Functions
.. kernel-doc:: include/linux/log2.h
:internal:
Integer power Functions
-----------------------
Integer log and power Functions
-------------------------------
.. kernel-doc:: include/linux/int_log.h
:export:
.. kernel-doc:: lib/math/int_pow.c
:export:

9
Documentation/driver-api/media/dtv-common.rst
View File

@ -3,15 +3,6 @@
Digital TV Common functions
---------------------------
Math functions
~~~~~~~~~~~~~~
Provide some commonly-used math functions, usually required in order to
estimate signal strength and signal to noise measurements in dB.
.. kernel-doc:: include/media/dvb_math.h
DVB devices
~~~~~~~~~~~

2
drivers/media/dvb-core/Makefile
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@ -8,6 +8,6 @@ dvb-vb2-$(CONFIG_DVB_MMAP) := dvb_vb2.o
dvb-core-objs := dvbdev.o dmxdev.o dvb_demux.o \
dvb_ca_en50221.o dvb_frontend.o \
$(dvb-net-y) dvb_ringbuffer.o $(dvb-vb2-y) dvb_math.o
$(dvb-net-y) dvb_ringbuffer.o $(dvb-vb2-y)
obj-$(CONFIG_DVB_CORE) += dvb-core.o

2
drivers/media/dvb-frontends/af9013_priv.h
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@ -12,7 +12,7 @@
#define AF9013_PRIV_H
#include <media/dvb_frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "af9013.h"
#include <linux/firmware.h>
#include <linux/i2c-mux.h>

2
drivers/media/dvb-frontends/af9033_priv.h
View File

@ -14,7 +14,7 @@
#include <linux/math64.h>
#include <linux/regmap.h>
#include <linux/kernel.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
struct reg_val {
u32 reg;

2
drivers/media/dvb-frontends/cxd2820r_priv.h
View File

@ -11,7 +11,7 @@
#include <linux/dvb/version.h>
#include <media/dvb_frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "cxd2820r.h"
#include <linux/gpio/driver.h> /* For gpio_chip */
#include <linux/math64.h>

2
drivers/media/dvb-frontends/cxd2841er.c
View File

@ -22,7 +22,7 @@
#include <linux/dynamic_debug.h>
#include <linux/kernel.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include <media/dvb_frontend.h>
#include "cxd2841er.h"
#include "cxd2841er_priv.h"

2
drivers/media/dvb-frontends/cxd2880/cxd2880_tnrdmd_dvbt2_mon.c
View File

@ -11,7 +11,7 @@
#include "cxd2880_tnrdmd_dvbt2.h"
#include "cxd2880_tnrdmd_dvbt2_mon.h"
#include <media/dvb_math.h>
#include <linux/int_log.h>
static const int ref_dbm_1000[4][8] = {
{-96000, -95000, -94000, -93000, -92000, -92000, -98000, -97000},

2
drivers/media/dvb-frontends/cxd2880/cxd2880_tnrdmd_dvbt_mon.c
View File

@ -11,7 +11,7 @@
#include "cxd2880_tnrdmd_dvbt.h"
#include "cxd2880_tnrdmd_dvbt_mon.h"
#include <media/dvb_math.h>
#include <linux/int_log.h>
static const int ref_dbm_1000[3][5] = {
{-93000, -91000, -90000, -89000, -88000},

2
drivers/media/dvb-frontends/cxd2880/cxd2880_top.c
View File

@ -11,7 +11,7 @@
#include <linux/spi/spi.h>
#include <media/dvb_frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "cxd2880.h"
#include "cxd2880_tnrdmd_mon.h"

2
drivers/media/dvb-frontends/dib7000p.c
View File

@ -13,7 +13,7 @@
#include <linux/mutex.h>
#include <asm/div64.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include <media/dvb_frontend.h>
#include "dib7000p.h"

2
drivers/media/dvb-frontends/dib8000.c
View File

@ -13,7 +13,7 @@
#include <linux/mutex.h>
#include <asm/div64.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include <media/dvb_frontend.h>

2
drivers/media/dvb-frontends/dib9000.c
View File

@ -11,7 +11,7 @@
#include <linux/i2c.h>
#include <linux/mutex.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include <media/dvb_frontend.h>
#include "dib9000.h"

2
drivers/media/dvb-frontends/drxk_hard.c
View File

@ -20,7 +20,7 @@
#include <media/dvb_frontend.h>
#include "drxk.h"
#include "drxk_hard.h"
#include <media/dvb_math.h>
#include <linux/int_log.h>
static int power_down_dvbt(struct drxk_state *state, bool set_power_mode);
static int power_down_qam(struct drxk_state *state);

2
drivers/media/dvb-frontends/lgdt3305.c
View File

@ -10,7 +10,7 @@
#include <asm/div64.h>
#include <linux/dvb/frontend.h>
#include <linux/slab.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "lgdt3305.h"
static int debug;

2
drivers/media/dvb-frontends/lgdt3306a.c
View File

@ -12,7 +12,7 @@
#include <asm/div64.h>
#include <linux/kernel.h>
#include <linux/dvb/frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "lgdt3306a.h"
#include <linux/i2c-mux.h>

2
drivers/media/dvb-frontends/lgdt330x.c
View File

@ -28,7 +28,7 @@
#include <asm/byteorder.h>
#include <media/dvb_frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "lgdt330x_priv.h"
#include "lgdt330x.h"

2
drivers/media/dvb-frontends/m88ds3103_priv.h
View File

@ -10,7 +10,7 @@
#include <media/dvb_frontend.h>
#include "m88ds3103.h"
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include <linux/firmware.h>
#include <linux/i2c-mux.h>
#include <linux/regmap.h>

2
drivers/media/dvb-frontends/mn88443x.c
View File

@ -10,7 +10,7 @@
#include <linux/gpio/consumer.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "mn88443x.h"

2
drivers/media/dvb-frontends/mn88472_priv.h
View File

@ -9,7 +9,7 @@
#define MN88472_PRIV_H
#include <media/dvb_frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "mn88472.h"
#include <linux/firmware.h>
#include <linux/regmap.h>

2
drivers/media/dvb-frontends/mn88473_priv.h
View File

@ -9,7 +9,7 @@
#define MN88473_PRIV_H
#include <media/dvb_frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "mn88473.h"
#include <linux/math64.h>
#include <linux/firmware.h>

2
drivers/media/dvb-frontends/or51132.c
View File

@ -27,7 +27,7 @@
#include <linux/slab.h>
#include <asm/byteorder.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include <media/dvb_frontend.h>
#include "or51132.h"

2
drivers/media/dvb-frontends/or51211.c
View File

@ -26,7 +26,7 @@
#include <linux/slab.h>
#include <asm/byteorder.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include <media/dvb_frontend.h>
#include "or51211.h"

2
drivers/media/dvb-frontends/rtl2830_priv.h
View File

@ -9,7 +9,7 @@
#define RTL2830_PRIV_H
#include <media/dvb_frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "rtl2830.h"
#include <linux/i2c-mux.h>
#include <linux/math64.h>

2
drivers/media/dvb-frontends/rtl2832_priv.h
View File

@ -14,7 +14,7 @@
#include <linux/bitops.h>
#include <media/dvb_frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "rtl2832.h"
struct rtl2832_dev {

2
drivers/media/dvb-frontends/si2165.c
View File

@ -19,7 +19,7 @@
#include <linux/regmap.h>
#include <media/dvb_frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "si2165_priv.h"
#include "si2165.h"

2
drivers/media/dvb-frontends/stv0367.c
View File

@ -15,7 +15,7 @@
#include <linux/slab.h>
#include <linux/i2c.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "stv0367.h"
#include "stv0367_defs.h"

2
drivers/media/dvb-frontends/tc90522.c
View File

@ -21,7 +21,7 @@
#include <linux/kernel.h>
#include <linux/math64.h>
#include <linux/dvb/frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "tc90522.h"
#define TC90522_I2C_THRU_REG 0xfe

2
drivers/media/dvb-frontends/tda10048.c
View File

@ -16,7 +16,7 @@
#include <linux/math64.h>
#include <asm/div64.h>
#include <media/dvb_frontend.h>
#include <media/dvb_math.h>
#include <linux/int_log.h>
#include "tda10048.h"
#define TDA10048_DEFAULT_FIRMWARE "dvb-fe-tda10048-1.0.fw"

7
include/media/dvb_math.h → include/linux/int_log.h
View File

@ -1,6 +1,5 @@
/*
* dvb-math provides some complex fixed-point math
* operations shared between the dvb related stuff
* Provides fixed-point logarithm operations.
*
* Copyright (C) 2006 Christoph Pfister (christophpfister@gmail.com)
*
@ -15,8 +14,8 @@
* GNU Lesser General Public License for more details.
*/
#ifndef __DVB_MATH_H
#define __DVB_MATH_H
#ifndef __LINUX_INT_LOG_H
#define __LINUX_INT_LOG_H
#include <linux/types.h>

2
lib/math/Makefile
View File

@ -1,5 +1,5 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-y += div64.o gcd.o lcm.o int_pow.o int_sqrt.o reciprocal_div.o
obj-y += div64.o gcd.o lcm.o int_log.o int_pow.o int_sqrt.o reciprocal_div.o
obj-$(CONFIG_CORDIC) += cordic.o
obj-$(CONFIG_PRIME_NUMBERS) += prime_numbers.o

11
drivers/media/dvb-core/dvb_math.c → lib/math/int_log.c
View File

@ -1,6 +1,5 @@
/*
* dvb-math provides some complex fixed-point math
* operations shared between the dvb related stuff
* Provides fixed-point logarithm operations.
*
* Copyright (C) 2006 Christoph Pfister (christophpfister@gmail.com)
*
@ -16,10 +15,12 @@
*/
#include <linux/bitops.h>
#include <linux/export.h>
#include <linux/int_log.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <asm/bug.h>
#include <media/dvb_math.h>
static const unsigned short logtable[256] = {
0x0000, 0x0171, 0x02e0, 0x044e, 0x05ba, 0x0725, 0x088e, 0x09f7,
@ -53,7 +54,7 @@ static const unsigned short logtable[256] = {
0xe82a, 0xe8ef, 0xe9b3, 0xea77, 0xeb3b, 0xebfe, 0xecc1, 0xed83,
0xee45, 0xef06, 0xefc8, 0xf088, 0xf149, 0xf209, 0xf2c8, 0xf387,
0xf446, 0xf505, 0xf5c3, 0xf680, 0xf73e, 0xf7fb, 0xf8b7, 0xf973,
0xfa2f, 0xfaea, 0xfba5, 0xfc60, 0xfd1a, 0xfdd4, 0xfe8e, 0xff47
0xfa2f, 0xfaea, 0xfba5, 0xfc60, 0xfd1a, 0xfdd4, 0xfe8e, 0xff47,
};
unsigned int intlog2(u32 value)