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iio:adc:qcom-spmi-vadc : fix undefined __divdi3

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A simple do_div call works here as all the signed 64 bit is
actually small and unsigned at this point, and the numerator is
u32.

Introduce a temporary u64 variable to avoid type comparison warnings
on some architectures.

Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Rama Krishna Phani A <rphani@codeaurora.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Jonathan Cameron 2016-12-30 18:25:49 +00:00
parent c3b2fdd0ea
commit 2bd72d84f6
1 changed files with 4 additions and 2 deletions
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6
drivers/iio/adc/qcom-spmi-vadc.c
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@ -658,13 +658,15 @@ static int vadc_scale_die_temp(struct vadc_priv *vadc,
{
const struct vadc_prescale_ratio *prescale;
s64 voltage = 0;
u64 temp; /* Temporary variable for do_div */
vadc_scale_calib(vadc, adc_code, prop, &voltage);
if (voltage > 0) {
prescale = &vadc_prescale_ratios[prop->prescale];
voltage = voltage * prescale->den;
voltage /= (prescale->num * 2);
temp = voltage * prescale->den;
do_div(temp, prescale->num * 2);
voltage = temp;
} else {
voltage = 0;
}