static int stm32_action_read()

in stm32-timer-cnt.c [231:269]

• 33 lines of code
• 8 McCabe index (conditional complexity)

static int stm32_action_read(struct counter_device *counter,
			     struct counter_count *count,
			     struct counter_synapse *synapse,
			     enum counter_synapse_action *action)
{
	enum counter_function function;
	int err;

	err = stm32_count_function_read(counter, count, &function);
	if (err)
		return err;

	switch (function) {
	case COUNTER_FUNCTION_INCREASE:
		/* counts on internal clock when CEN=1 */
		*action = COUNTER_SYNAPSE_ACTION_NONE;
		return 0;
	case COUNTER_FUNCTION_QUADRATURE_X2_A:
		/* counts up/down on TI1FP1 edge depending on TI2FP2 level */
		if (synapse->signal->id == count->synapses[0].signal->id)
			*action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
		else
			*action = COUNTER_SYNAPSE_ACTION_NONE;
		return 0;
	case COUNTER_FUNCTION_QUADRATURE_X2_B:
		/* counts up/down on TI2FP2 edge depending on TI1FP1 level */
		if (synapse->signal->id == count->synapses[1].signal->id)
			*action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
		else
			*action = COUNTER_SYNAPSE_ACTION_NONE;
		return 0;
	case COUNTER_FUNCTION_QUADRATURE_X4:
		/* counts up/down on both TI1FP1 and TI2FP2 edges */
		*action = COUNTER_SYNAPSE_ACTION_BOTH_EDGES;
		return 0;
	default:
		return -EINVAL;
	}
}