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staging: sm750fb: replace absDiff with kernel standard abs macro

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<linux/kernel.h> already has 'abs', use it instead of custom absDiff

Signed-off-by: Mike Rapoport <mike.rapoport@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Mike Rapoport 2016-02-19 17:56:13 +02:00 committed by Greg Kroah-Hartman
parent 0d5d733b4a
commit e074da3f80
2 changed files with 2 additions and 9 deletions
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3
drivers/staging/sm750fb/ddk750_chip.c
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@ -1,3 +1,4 @@
#include <linux/kernel.h>
#include <linux/sizes.h>
#include "ddk750_help.h"
@ -335,7 +336,7 @@ unsigned int calcPllValue(unsigned int request_orig, pll_value_t *pll)
unsigned int diff;
tmpClock = pll->inputFreq * M / N / X;
diff = absDiff(tmpClock, request_orig);
diff = abs(tmpClock - request_orig);
if (diff < mini_diff) {
pll->M = M;
pll->N = N;

8
drivers/staging/sm750fb/sm750_help.h
View File

@ -38,14 +38,6 @@
#define FIELD_SIZE(field) (1 + FIELD_END(field) - FIELD_START(field))
#define FIELD_MASK(field) (((1 << (FIELD_SIZE(field)-1)) | ((1 << (FIELD_SIZE(field)-1)) - 1)) << FIELD_START(field))
static inline unsigned int absDiff(unsigned int a, unsigned int b)
{
if (a < b)
return b-a;
else
return a-b;
}
/* n / d + 1 / 2 = (2n + d) / 2d */
#define roundedDiv(num, denom) ((2 * (num) + (denom)) / (2 * (denom)))
#define MHz(x) ((x) * 1000000)