u-boot/lib/strmhz.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2002-2006
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 */
#include <common.h>

char *strmhz (char *buf, unsigned long hz)
{
	long l, n;
	long m;

	n = DIV_ROUND_CLOSEST(hz, 1000) / 1000L;
	l = sprintf (buf, "%ld", n);

	hz -= n * 1000000L;
	m = DIV_ROUND_CLOSEST(hz, 1000L);
	if (m != 0)
		sprintf (buf + l, ".%03ld", m);
	return (buf);
}
SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com> 2018-05-07 05:58:06 +08:00			`// SPDX-License-Identifier: GPL-2.0+`
Consolidate strmhz() implementation ARM, i386, m68k and ppc all have identical implementations of strmhz(). Other architectures don't provide this function at all. This patch moves strmhz() into lib_generic, reducing code duplication and providing a more unified API across architectures. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> 2008-08-18 19:41:27 +08:00			`/*`
			`* (C) Copyright 2002-2006`
			`* Wolfgang Denk, DENX Software Engineering, wd@denx.de.`
			`*/`
			`#include <common.h>`

strmhz: Make hz unsigned to support greater than 2146 MHz clock For example, an input of 0x80000000 should print: 2147.484 instead of -2147.-483. Signed-off-by: Ed Swarthout <Ed.Swarthout@freescale.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org> 2011-03-06 00:28:17 +08:00			`char strmhz (char buf, unsigned long hz)`
Consolidate strmhz() implementation ARM, i386, m68k and ppc all have identical implementations of strmhz(). Other architectures don't provide this function at all. This patch moves strmhz() into lib_generic, reducing code duplication and providing a more unified API across architectures. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> 2008-08-18 19:41:27 +08:00			`{`
			`long l, n;`
			`long m;`

replace DIV_ROUND with DIV_ROUND_CLOSEST The Linux-compatible macro DIV_ROUND_CLOSEST is a bit more flexible and safer than DIV_ROUND. For example, foo = DIV_ROUND_CLOSEST(x, y++) works expectedly, but foo = DIV_ROUND(x, y++) does not. (y is incremented twice.) Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> 2014-11-07 02:03:26 +08:00			`n = DIV_ROUND_CLOSEST(hz, 1000) / 1000L;`
Consolidate strmhz() implementation ARM, i386, m68k and ppc all have identical implementations of strmhz(). Other architectures don't provide this function at all. This patch moves strmhz() into lib_generic, reducing code duplication and providing a more unified API across architectures. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> 2008-08-18 19:41:27 +08:00			`l = sprintf (buf, "%ld", n);`
strmhz(): Round numbers when printing clock frequencies Round clock frequencies for printing. Many boards printed off clock frequencies like 399 MHz instead of the exact 400 MHz because numberes were not rounded. This is fixed now. Signed-off-by: Wolfgang Denk <wd@denx.de> 2008-10-19 08:35:48 +08:00
			`hz -= n * 1000000L;`
replace DIV_ROUND with DIV_ROUND_CLOSEST The Linux-compatible macro DIV_ROUND_CLOSEST is a bit more flexible and safer than DIV_ROUND. For example, foo = DIV_ROUND_CLOSEST(x, y++) works expectedly, but foo = DIV_ROUND(x, y++) does not. (y is incremented twice.) Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com> 2014-11-07 02:03:26 +08:00			`m = DIV_ROUND_CLOSEST(hz, 1000L);`
Consolidate strmhz() implementation ARM, i386, m68k and ppc all have identical implementations of strmhz(). Other architectures don't provide this function at all. This patch moves strmhz() into lib_generic, reducing code duplication and providing a more unified API across architectures. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> 2008-08-18 19:41:27 +08:00			`if (m != 0)`
			`sprintf (buf + l, ".%03ld", m);`
			`return (buf);`
			`}`