pwm: lpss: Avoid potential overflow of base_unit

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The resolution of base_unit is derived from base_unit_bits and thus must be
equal to (2^base_unit_bits - 1). Otherwise frequency and therefore base_unit
might potentially overflow.

Prevent the above by substracting 1 in all cases where base_unit_bits or
derivative is used.

Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

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Andy Shevchenko 2017-01-28 17:10:39 +02:00 • committed by Thierry Reding

parent 8d254a340e

commit 684309e504

1 changed files with 3 additions and 3 deletions

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6

drivers/pwm/pwm-lpss.c

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