Commit 14c200d0 authored Sep 26, 2019 by Andrei Emeltchenko Committed by Maureen Helm Sep 26, 2019

drivers: pwm: Fix wrong dc calculation for pwm tests



Values used in tests/drivers/pwm/pwm_api overflows calculation inside
xec_compute_dc(). Make calculation to be done in u64_t and then
convert to int.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>

parent ff733369

drivers/pwm/pwm_mchp_xec.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -136,7 +136,8 @@ static u32_t xec_compute_dc(u32_t on, u32_t off)
		{
		int dc = (on + 1) + (off + 1);

		dc = (((on + 1) * XEC_PWM_DC_PF) / dc);
		/* Make calculation in u64_t since XEC_PWM_DC_PF is large */
		dc = (((u64_t)(on + 1) * XEC_PWM_DC_PF) / dc);

		return (u32_t)dc;
		}

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