Hi Dear backports Devs for driver brcmsmac, Coming to the point, I want to lower the TX power of my BCM4313, under the official values set by the regdom, to any special value I need. So I'm trying to build such a "personal" patch, only for me, based on latest backports v3.19 and latest Ubuntu. Useless to say, "iwconfig <wlan> txpower" doesn't work, the resulting TX power doesn't change. I know it doesn't work because I can measure the RSSI coming out from the BCM4313, using another device: it doesn't change, whatever value I set. So, I gave a look at the code for the brcmsmac module, and I think I found the location where the TX power is *finally* set: inside wlc_lcnphy_txpower_recalc_target (phy_lcn.c), call to wlc_lcnphy_set_target_tx_pwr. AFAIU, in that function a table of tx_power_offsets (calculated by another function) is written in the device EPROM registry, and the TX power is set to the relative minimum. Now, my question: is that the right way to change effectively the TX power? I need to ask You a confirmation about that, if that is correct, before I start building my patch. I don't want to frustrate my time developing in the wrong code, or damage the device, or other issues... :) Thank you for your attention, and looking forward your feedback. -- http://www.fastmail.com - mmm... Fastmail... -- 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
