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[media] radio-tea5777.c: Get rid of do_div usage

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freq fits easily into 32 bits until it gets shifted, so make it 32 bits,
and cast it to 64 bits before shifting.

[mchehab@redhat.com: also remove asm/div64.h header, as this is not
 needed anymore]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans de Goede 2012-08-10 07:47:25 -03:00 committed by Mauro Carvalho Chehab
parent fc488517cc
commit 4fad5c474f
1 changed files with 5 additions and 7 deletions
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12
drivers/media/radio/radio-tea5777.c
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@ -33,7 +33,6 @@
#include <media/v4l2-fh.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-event.h>
#include <asm/div64.h>
#include "radio-tea5777.h"
MODULE_AUTHOR("Hans de Goede <perex@perex.cz>");
@ -155,18 +154,17 @@ static u32 tea5777_freq_to_v4l2_freq(struct radio_tea5777 *tea, u32 freq)
static int radio_tea5777_set_freq(struct radio_tea5777 *tea)
{
u64 freq;
u32 freq;
int res;
freq = clamp_t(u32, tea->freq,
TEA5777_FM_RANGELOW, TEA5777_FM_RANGEHIGH) + 8;
do_div(freq, 16); /* to kHz */
TEA5777_FM_RANGELOW, TEA5777_FM_RANGEHIGH);
freq = (freq + 8) / 16; /* to kHz */
freq -= TEA5777_FM_IF;
do_div(freq, TEA5777_FM_FREQ_STEP);
freq = (freq - TEA5777_FM_IF) / TEA5777_FM_FREQ_STEP;
tea->write_reg &= ~(TEA5777_W_FM_PLL_MASK | TEA5777_W_FM_FREF_MASK);
tea->write_reg |= freq << TEA5777_W_FM_PLL_SHIFT;
tea->write_reg |= (u64)freq << TEA5777_W_FM_PLL_SHIFT;
tea->write_reg |= TEA5777_W_FM_FREF_VALUE << TEA5777_W_FM_FREF_SHIFT;
res = tea->ops->write_reg(tea, tea->write_reg);