In drivers/net/wireless/ath/ath9k/init.c, both CHAN2G and CHAN5G set .max_power to 20, represented in dBm. I’m wondering how this number was chosen. Is it simply a safe generic value? I’m dealing with a device on which the vendor’s madwifi-based binary driver would show 23dBm for 2.4GHz and 18dBm for 5GHz (although only when I asked it for 26dBm and 24dBm respectively, so I’m not sure which set of numbers to believe.) I noticed that in ath9k, if these .max_power limits are raised, the driver is happy to set a somewhat higher transmit power. In this case, it will max out at 25dBm for 2.4GHz and 21dBm for 5GHz. These are still below the relevant regulatory limits. These values seem to be computed by routines in eeprom_*.c, so I’m wondering if they’re based on the card’s own data and safe to use without fear of burning the radios. -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
