Can anyone explain me this code snippet?
```
	/* Pick the right VCO. */
		if (hd->user_vco_mask && rate > hd->low_vco_max_rate)
			regval |= hd->user_vco_mask;
		regmap_write(regmap, hd->user_reg, regval);
```
after i tried to "compute" it , it gave some pointless results