static int _opp_set_voltage()

in ti-opp-supply.c [216:267]

• 38 lines of code
• 7 McCabe index (conditional complexity)

static int _opp_set_voltage(struct device *dev,
			    struct dev_pm_opp_supply *supply,
			    int new_target_uv, struct regulator *reg,
			    char *reg_name)
{
	int ret;
	unsigned long vdd_uv, uv_max;

	if (new_target_uv)
		vdd_uv = new_target_uv;
	else
		vdd_uv = supply->u_volt;

	/*
	 * If we do have an absolute max voltage specified, then we should
	 * use that voltage instead to allow for cases where the voltage rails
	 * are ganged (example if we set the max for an opp as 1.12v, and
	 * the absolute max is 1.5v, for another rail to get 1.25v, it cannot
	 * be achieved if the regulator is constrainted to max of 1.12v, even
	 * if it can function at 1.25v
	 */
	if (opp_data.vdd_absolute_max_voltage_uv)
		uv_max = opp_data.vdd_absolute_max_voltage_uv;
	else
		uv_max = supply->u_volt_max;

	if (vdd_uv > uv_max ||
	    vdd_uv < supply->u_volt_min ||
	    supply->u_volt_min > uv_max) {
		dev_warn(dev,
			 "Invalid range voltages [Min:%lu target:%lu Max:%lu]\n",
			 supply->u_volt_min, vdd_uv, uv_max);
		return -EINVAL;
	}

	dev_dbg(dev, "%s scaling to %luuV[min %luuV max %luuV]\n", reg_name,
		vdd_uv, supply->u_volt_min,
		uv_max);

	ret = regulator_set_voltage_triplet(reg,
					    supply->u_volt_min,
					    vdd_uv,
					    uv_max);
	if (ret) {
		dev_err(dev, "%s failed for %luuV[min %luuV max %luuV]\n",
			reg_name, vdd_uv, supply->u_volt_min,
			uv_max);
		return ret;
	}

	return 0;
}