HI6220_TEMP_STEP
return HI6220_TEMP_BASE + (step * HI6220_TEMP_STEP);
return DIV_ROUND_UP(temp - HI6220_TEMP_BASE, HI6220_TEMP_STEP);
writel(DIV_ROUND_UP(value, HI6220_TEMP_STEP) & 0x1F,