static int ti_eqep_function_write()

in ti-eqep.c [147:174]

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

static int ti_eqep_function_write(struct counter_device *counter,
				  struct counter_count *count,
				  enum counter_function function)
{
	struct ti_eqep_cnt *priv = ti_eqep_count_from_counter(counter);
	enum ti_eqep_count_func qsrc;

	switch (function) {
	case COUNTER_FUNCTION_QUADRATURE_X4:
		qsrc = TI_EQEP_COUNT_FUNC_QUAD_COUNT;
		break;
	case COUNTER_FUNCTION_PULSE_DIRECTION:
		qsrc = TI_EQEP_COUNT_FUNC_DIR_COUNT;
		break;
	case COUNTER_FUNCTION_INCREASE:
		qsrc = TI_EQEP_COUNT_FUNC_UP_COUNT;
		break;
	case COUNTER_FUNCTION_DECREASE:
		qsrc = TI_EQEP_COUNT_FUNC_DOWN_COUNT;
		break;
	default:
		/* should never reach this path */
		return -EINVAL;
	}

	return regmap_write_bits(priv->regmap16, QDECCTL, QDECCTL_QSRC,
				 qsrc << QDECCTL_QSRC_SHIFT);
}