target/linux/bcm53xx/patches-4.9/032-0007-ARM-BCM5301X-Set-5-GHz-wireless-frequency-limits-on-.patch

   1 From d3af86018715ebb19f4111f80e545405b208f09b Mon Sep 17 00:00:00 2001
   2 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
   3 Date: Sat, 14 Jan 2017 00:58:57 +0100
   4 Subject: [PATCH] ARM: BCM5301X: Set 5 GHz wireless frequency limits on Netgear
   5  R8000
   6 MIME-Version: 1.0
   7 Content-Type: text/plain; charset=UTF-8
   8 Content-Transfer-Encoding: 8bit
   9
  10 Netgear R8000 is a tri-band home router. It has three BCM43602 chipsets
  11 two of them for 5 GHz band. Both seem the same and their firmwares
  12 report the same set of channels. The problem is due to hardware / board
  13 design there are extra limitations that should be respected.
  14
  15 First PHY should be used for U-NII-2 and U-NII-3. Third PHY should be
  16 used for U-NII-1. Using them in a different way may result in wireless
  17 not working or in noticeably reduced performance. Basic version of this
  18 info was provided by Broadcom employee, then it has been verified by me
  19 using original vendor firmware (which has limitations hardcoded in UI).
  20
  21 This patch uses recently introduced ieee80211-freq-limit property to
  22 describe these limitations at DT level.
  23
  24 Referencing PCIe devices in DT required specifying all related bridges.
  25 Below you can see (a bit complex) PCI tree from R8000 that explains all
  26 entries that I needed to put in DT.
  27
  28 0000:00:00.0            14e4:8012       Bridge Device
  29 └─ 0000:01:00.0             14e4:aa52       Network Controller
  30
  31 0001:00:00.0            14e4:8012       Bridge Device
  32 └─ 0001:01:00.0             10b5:8603       Bridge Device
  33    ├─ 0001:02:01.0  10b5:8603       Bridge Device
  34    │  └─ 0001:03:00.0     14e4:aa52       Network Controller
  35    ├─ 0001:02:02.0  10b5:8603       Bridge Device
  36    │  └─ 0001:04:00.0     14e4:aa52       Network Controller
  37    ├─ 0001:02:03.0  000d:0000       0x000000
  38    ├─ 0001:02:04.0  000d:0000       0x000000
  39    ├─ 0001:02:05.0  000d:0000       0x000000
  40    ├─ 0001:02:06.0  000d:0000       0x000000
  41    ├─ (...)
  42    ├─ 0001:02:1d.0  000d:0000       0x000000
  43    ├─ 0001:02:1e.0  000d:0000       0x000000
  44    └─ 0001:02:1f.0  000d:0000       0x000000
  45
  46 Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
  47 Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
  48 ---
  49  arch/arm/boot/dts/bcm4709-netgear-r8000.dts | 48 +++++++++++++++++++++++++++++
  50  arch/arm/boot/dts/bcm5301x.dtsi             |  8 +++++
  51  2 files changed, 56 insertions(+)
  52
  53 --- a/arch/arm/boot/dts/bcm4709-netgear-r8000.dts
  54 +++ b/arch/arm/boot/dts/bcm4709-netgear-r8000.dts
  55 @@ -108,6 +108,54 @@
  56         };
  57  };
  58
  59 +&pcie0 {
  60 +       #address-cells = <3>;
  61 +       #size-cells = <2>;
  62 +
  63 +       bridge@0,0,0 {
  64 +               reg = <0x0000 0 0 0 0>;
  65 +
  66 +               #address-cells = <3>;
  67 +               #size-cells = <2>;
  68 +
  69 +               wifi@0,1,0 {
  70 +                       reg = <0x0000 0 0 0 0>;
  71 +                       ieee80211-freq-limit = <5735000 5835000>;
  72 +               };
  73 +       };
  74 +};
  75 +
  76 +&pcie1 {
  77 +       #address-cells = <3>;
  78 +       #size-cells = <2>;
  79 +
  80 +       bridge@1,0,0 {
  81 +               reg = <0x0000 0 0 0 0>;
  82 +
  83 +               #address-cells = <3>;
  84 +               #size-cells = <2>;
  85 +
  86 +               bridge@1,1,0 {
  87 +                       reg = <0x0000 0 0 0 0>;
  88 +
  89 +                       #address-cells = <3>;
  90 +                       #size-cells = <2>;
  91 +
  92 +                       bridge@1,2,2 {
  93 +                               reg = <0x1000 0 0 0 0>;
  94 +
  95 +                               #address-cells = <3>;
  96 +                               #size-cells = <2>;
  97 +
  98 +                               wifi@1,4,0 {
  99 +                                       reg = <0x0000 0 0 0 0>;
 100 +                                       ieee80211-freq-limit = <5170000 5730000>;
 101 +                               };
 102 +                       };
 103 +               };
 104 +       };
 105 +};
 106 +
 107  &usb2 {
 108         vcc-gpio = <&chipcommon 0 GPIO_ACTIVE_HIGH>;
 109  };
 110 --- a/arch/arm/boot/dts/bcm5301x.dtsi
 111 +++ b/arch/arm/boot/dts/bcm5301x.dtsi
 112 @@ -243,6 +243,14 @@
 113                         #gpio-cells = <2>;
 114                 };
 115
 116 +               pcie0: pcie@12000 {
 117 +                       reg = <0x00012000 0x1000>;
 118 +               };
 119 +
 120 +               pcie1: pcie@13000 {
 121 +                       reg = <0x00013000 0x1000>;
 122 +               };
 123 +
 124                 usb2: usb2@21000 {
 125                         reg = <0x00021000 0x1000>;
 126