tree 868e579924e3c6cd154996acfef67fb9157e8b26
parent 5b520bbb538da7f7122b1e5dc85f2b4c592d4781
author Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de> 1392633248 +0100
committer David S. Miller <davem@davemloft.net> 1392673358 -0500

ieee802154: add TX power control to wpan_phy

Replace the current u8 transmit_power in wpan_phy with s8 transmit_power.
The u8 field contained the actual tx power and a tolerance field,
which no physical radio every used. Adjust sysfs entries to keep
compatibility with userspace, give tolerances of +-1dB statically there.

This patch only adds support for this in the at86rf230 driver and the
RF212 chip. Configuration calculation for RF212 is also somewhat basic,
but does the job - the RF212 datasheet gives a large table with
suggested values for combinations of TX power and page/channel, if this
does not work well, we might have to copy the whole table.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>