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Register cfg80211_sar_capa with type NL80211_SAR_TYPE_POWER and four frequency ranges for configurations in unit of 0.25 dBm. And handle callback set_sar_specs. Originally, TX power has three main parameters, i.e. power base, power by rate, and power limit. The formula can be simply considered as TX power = power base + min(power by rate, power limit). With the support of SAR which can be treated as another power limit, there is one more parameter for TX power. And the formula will evolve into TX power = power base + min(power by rate, power limit, power sar). Besides, debugfs tx_pwr_tbl is also refined to show SAR information. The following is an example for the difference. Before supporting SAR, ----------------------------------- ... path rate pwr base (byr lmt ) rem A CCK_1M 66(0x42) 78 -12 ( 12 -12) 0 A CCK_2M 66(0x42) 78 -12 ( 8 -12) 0 ... ----------------------------------- After supporting SAR and making some configurations, ----------------------------------- ... path rate pwr base (byr lmt sar ) rem A CCK_1M 62(0x3e) 78 -16 ( 12 -12 -16) 0 A CCK_2M 62(0x3e) 78 -16 ( 8 -12 -16) 0 ... ----------------------------------- Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/20211220093656.65312-1-pkshih@realtek.com
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.