static int stm32_count_function_read()

in stm32-timer-cnt.c [71:96]

• 24 lines of code
• 5 McCabe index (conditional complexity)

static int stm32_count_function_read(struct counter_device *counter,
				     struct counter_count *count,
				     enum counter_function *function)
{
	struct stm32_timer_cnt *const priv = counter_priv(counter);
	u32 smcr;

	regmap_read(priv->regmap, TIM_SMCR, &smcr);

	switch (smcr & TIM_SMCR_SMS) {
	case TIM_SMCR_SMS_SLAVE_MODE_DISABLED:
		*function = COUNTER_FUNCTION_INCREASE;
		return 0;
	case TIM_SMCR_SMS_ENCODER_MODE_1:
		*function = COUNTER_FUNCTION_QUADRATURE_X2_A;
		return 0;
	case TIM_SMCR_SMS_ENCODER_MODE_2:
		*function = COUNTER_FUNCTION_QUADRATURE_X2_B;
		return 0;
	case TIM_SMCR_SMS_ENCODER_MODE_3:
		*function = COUNTER_FUNCTION_QUADRATURE_X4;
		return 0;
	default:
		return -EINVAL;
	}
}