arch/risc-v/src/mpfs/mpfs_corepwm.c: Disable PWM channels in setup

Set frequency to zero and disable channels in pwm_setup() to avoid unexpected behaviour when starting PWM. Signed-off-by: Jani Paalijarvi <[email protected]>
tiiuae · Sep 18, 2024 · 45d79b8 · 45d79b8
1 parent 1826648
commit 45d79b8
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/arch/risc-v/src/mpfs/mpfs_corepwm.c b/arch/risc-v/src/mpfs/mpfs_corepwm.c
@@ -557,6 +557,13 @@ static int pwm_setup(struct pwm_lowerhalf_s *dev)
   struct mpfs_pwmtimer_s *priv = (struct mpfs_pwmtimer_s *)dev;
 
   pwminfo("PWMID%u\n", priv->pwmid);
+
+  /* Make sure that frequency is zero and channels has been disabled */
+
+  priv->frequency = 0;
+  pwm_putreg(priv, MPFS_COREPWM_PWM_ENABLE_0_7_OFFSET,  0x00);
+  pwm_putreg(priv, MPFS_COREPWM_PWM_ENABLE_8_15_OFFSET, 0x00);
+
   pwm_dumpregs(priv, "Initially");
 
   return OK;