linux/lib/bcd.c

#include <linux/bcd.h>
#include <linux/export.h>

unsigned _bcd2bin(unsigned char val)
{
	return (val & 0x0f) + (val >> 4) * 10;
}
EXPORT_SYMBOL(_bcd2bin);

unsigned char _bin2bcd(unsigned val)
{
	return ((val / 10) << 4) + val % 10;
}
EXPORT_SYMBOL(_bin2bcd);
rtc: BCD codeshrink This updates <linux/bcd.h> to define the key routines as constant functions, which the macros will then call. Newer code can now call bcd2bin() instead of SCREAMING BCD2BIN() TO THE FOUR WINDS. This lets each driver shrink their codespace by using N function calls to a single (global) copy of those routines, instead of N inlined copies of these functions per driver. These routines aren't used in speed-critical code. Almost all callers are in the RTC framework. Typical per-driver savings is near 300 bytes. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Adrian Bunk <bunk@kernel.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2008-07-24 12:30:37 +08:00			`#include <linux/bcd.h>`
lib: reduce the use of module.h wherever possible For files only using THIS_MODULE and/or EXPORT_SYMBOL, map them onto including export.h -- or if the file isn't even using those, then just delete the include. Fix up any implicit include dependencies that were being masked by module.h along the way. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> 2011-11-17 10:29:17 +08:00			`#include <linux/export.h>`
rtc: BCD codeshrink This updates <linux/bcd.h> to define the key routines as constant functions, which the macros will then call. Newer code can now call bcd2bin() instead of SCREAMING BCD2BIN() TO THE FOUR WINDS. This lets each driver shrink their codespace by using N function calls to a single (global) copy of those routines, instead of N inlined copies of these functions per driver. These routines aren't used in speed-critical code. Almost all callers are in the RTC framework. Typical per-driver savings is near 300 bytes. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Adrian Bunk <bunk@kernel.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2008-07-24 12:30:37 +08:00
usb/core: use bin2bcd() for bcdDevice in RH The kernel's version number is used as decimal in the bcdDevice field of the RH descriptor. For kernel version v3.12 we would see 3.0c in lsusb. I am not sure how important it is to stick with bcd values since this is this way since we started git history and nobody complained (however back then we reported only 2.6). Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2012-09-07 20:31:45 +08:00			`unsigned _bcd2bin(unsigned char val)`
rtc: BCD codeshrink This updates <linux/bcd.h> to define the key routines as constant functions, which the macros will then call. Newer code can now call bcd2bin() instead of SCREAMING BCD2BIN() TO THE FOUR WINDS. This lets each driver shrink their codespace by using N function calls to a single (global) copy of those routines, instead of N inlined copies of these functions per driver. These routines aren't used in speed-critical code. Almost all callers are in the RTC framework. Typical per-driver savings is near 300 bytes. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Adrian Bunk <bunk@kernel.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2008-07-24 12:30:37 +08:00			`{`
			`return (val & 0x0f) + (val >> 4) * 10;`
			`}`
usb/core: use bin2bcd() for bcdDevice in RH The kernel's version number is used as decimal in the bcdDevice field of the RH descriptor. For kernel version v3.12 we would see 3.0c in lsusb. I am not sure how important it is to stick with bcd values since this is this way since we started git history and nobody complained (however back then we reported only 2.6). Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2012-09-07 20:31:45 +08:00			`EXPORT_SYMBOL(_bcd2bin);`
rtc: BCD codeshrink This updates <linux/bcd.h> to define the key routines as constant functions, which the macros will then call. Newer code can now call bcd2bin() instead of SCREAMING BCD2BIN() TO THE FOUR WINDS. This lets each driver shrink their codespace by using N function calls to a single (global) copy of those routines, instead of N inlined copies of these functions per driver. These routines aren't used in speed-critical code. Almost all callers are in the RTC framework. Typical per-driver savings is near 300 bytes. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Adrian Bunk <bunk@kernel.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2008-07-24 12:30:37 +08:00
usb/core: use bin2bcd() for bcdDevice in RH The kernel's version number is used as decimal in the bcdDevice field of the RH descriptor. For kernel version v3.12 we would see 3.0c in lsusb. I am not sure how important it is to stick with bcd values since this is this way since we started git history and nobody complained (however back then we reported only 2.6). Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2012-09-07 20:31:45 +08:00			`unsigned char _bin2bcd(unsigned val)`
rtc: BCD codeshrink This updates <linux/bcd.h> to define the key routines as constant functions, which the macros will then call. Newer code can now call bcd2bin() instead of SCREAMING BCD2BIN() TO THE FOUR WINDS. This lets each driver shrink their codespace by using N function calls to a single (global) copy of those routines, instead of N inlined copies of these functions per driver. These routines aren't used in speed-critical code. Almost all callers are in the RTC framework. Typical per-driver savings is near 300 bytes. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Adrian Bunk <bunk@kernel.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 2008-07-24 12:30:37 +08:00			`{`
			`return ((val / 10) << 4) + val % 10;`
			`}`
usb/core: use bin2bcd() for bcdDevice in RH The kernel's version number is used as decimal in the bcdDevice field of the RH descriptor. For kernel version v3.12 we would see 3.0c in lsusb. I am not sure how important it is to stick with bcd values since this is this way since we started git history and nobody complained (however back then we reported only 2.6). Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 2012-09-07 20:31:45 +08:00			`EXPORT_SYMBOL(_bin2bcd);`