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Netgear R8000 is a tri-band home router. It has three BCM43602 chipsets two of them for 5 GHz band. Both seem the same and their firmwares report the same set of channels. The problem is due to hardware / board design there are extra limitations that should be respected. First PHY should be used for U-NII-2 and U-NII-3. Third PHY should be used for U-NII-1. Using them in a different way may result in wireless not working or in noticeably reduced performance. Basic version of this info was provided by Broadcom employee, then it has been verified by me using original vendor firmware (which has limitations hardcoded in UI). This patch uses recently introduced ieee80211-freq-limit property to describe these limitations at DT level. Referencing PCIe devices in DT required specifying all related bridges. Below you can see (a bit complex) PCI tree from R8000 that explains all entries that I needed to put in DT. 0000:00:00.0 14e4:8012 Bridge Device └─ 0000:01:00.0 14e4:aa52 Network Controller 0001:00:00.0 14e4:8012 Bridge Device └─ 0001:01:00.0 10b5:8603 Bridge Device ├─ 0001:02:01.0 10b5:8603 Bridge Device │ └─ 0001:03:00.0 14e4:aa52 Network Controller ├─ 0001:02:02.0 10b5:8603 Bridge Device │ └─ 0001:04:00.0 14e4:aa52 Network Controller ├─ 0001:02:03.0 000d:0000 0x000000 ├─ 0001:02:04.0 000d:0000 0x000000 ├─ 0001:02:05.0 000d:0000 0x000000 ├─ 0001:02:06.0 000d:0000 0x000000 ├─ (...) ├─ 0001:02:1d.0 000d:0000 0x000000 ├─ 0001:02:1e.0 000d:0000 0x000000 └─ 0001:02:1f.0 000d:0000 0x000000 Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> |
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Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. 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.