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127 lines
3.4 KiB
Diff
127 lines
3.4 KiB
Diff
From d3af86018715ebb19f4111f80e545405b208f09b Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Sat, 14 Jan 2017 00:58:57 +0100
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Subject: [PATCH] ARM: BCM5301X: Set 5 GHz wireless frequency limits on Netgear
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R8000
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Netgear R8000 is a tri-band home router. It has three BCM43602 chipsets
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two of them for 5 GHz band. Both seem the same and their firmwares
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report the same set of channels. The problem is due to hardware / board
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design there are extra limitations that should be respected.
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First PHY should be used for U-NII-2 and U-NII-3. Third PHY should be
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used for U-NII-1. Using them in a different way may result in wireless
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not working or in noticeably reduced performance. Basic version of this
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info was provided by Broadcom employee, then it has been verified by me
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using original vendor firmware (which has limitations hardcoded in UI).
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This patch uses recently introduced ieee80211-freq-limit property to
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describe these limitations at DT level.
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Referencing PCIe devices in DT required specifying all related bridges.
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Below you can see (a bit complex) PCI tree from R8000 that explains all
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entries that I needed to put in DT.
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0000:00:00.0 14e4:8012 Bridge Device
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└─ 0000:01:00.0 14e4:aa52 Network Controller
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0001:00:00.0 14e4:8012 Bridge Device
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└─ 0001:01:00.0 10b5:8603 Bridge Device
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├─ 0001:02:01.0 10b5:8603 Bridge Device
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│ └─ 0001:03:00.0 14e4:aa52 Network Controller
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├─ 0001:02:02.0 10b5:8603 Bridge Device
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│ └─ 0001:04:00.0 14e4:aa52 Network Controller
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├─ 0001:02:03.0 000d:0000 0x000000
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├─ 0001:02:04.0 000d:0000 0x000000
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├─ 0001:02:05.0 000d:0000 0x000000
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├─ 0001:02:06.0 000d:0000 0x000000
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├─ (...)
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├─ 0001:02:1d.0 000d:0000 0x000000
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├─ 0001:02:1e.0 000d:0000 0x000000
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└─ 0001:02:1f.0 000d:0000 0x000000
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
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---
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arch/arm/boot/dts/bcm4709-netgear-r8000.dts | 48 +++++++++++++++++++++++++++++
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arch/arm/boot/dts/bcm5301x.dtsi | 8 +++++
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2 files changed, 56 insertions(+)
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--- a/arch/arm/boot/dts/bcm4709-netgear-r8000.dts
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+++ b/arch/arm/boot/dts/bcm4709-netgear-r8000.dts
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@@ -108,6 +108,54 @@
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};
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};
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+&pcie0 {
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+ #address-cells = <3>;
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+ #size-cells = <2>;
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+
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+ bridge@0,0,0 {
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+ reg = <0x0000 0 0 0 0>;
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+
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+ #address-cells = <3>;
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+ #size-cells = <2>;
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+
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+ wifi@0,1,0 {
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+ reg = <0x0000 0 0 0 0>;
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+ ieee80211-freq-limit = <5735000 5835000>;
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+ };
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+ };
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+};
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+
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+&pcie1 {
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+ #address-cells = <3>;
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+ #size-cells = <2>;
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+
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+ bridge@1,0,0 {
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+ reg = <0x0000 0 0 0 0>;
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+
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+ #address-cells = <3>;
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+ #size-cells = <2>;
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+
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+ bridge@1,1,0 {
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+ reg = <0x0000 0 0 0 0>;
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+
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+ #address-cells = <3>;
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+ #size-cells = <2>;
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+
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+ bridge@1,2,2 {
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+ reg = <0x1000 0 0 0 0>;
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+
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+ #address-cells = <3>;
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+ #size-cells = <2>;
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+
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+ wifi@1,4,0 {
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+ reg = <0x0000 0 0 0 0>;
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+ ieee80211-freq-limit = <5170000 5730000>;
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+ };
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+ };
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+ };
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+ };
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+};
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+
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&usb2 {
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vcc-gpio = <&chipcommon 0 GPIO_ACTIVE_HIGH>;
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};
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--- a/arch/arm/boot/dts/bcm5301x.dtsi
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+++ b/arch/arm/boot/dts/bcm5301x.dtsi
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@@ -243,6 +243,14 @@
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#gpio-cells = <2>;
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};
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+ pcie0: pcie@12000 {
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+ reg = <0x00012000 0x1000>;
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+ };
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+
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+ pcie1: pcie@13000 {
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+ reg = <0x00013000 0x1000>;
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+ };
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+
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usb2: usb2@21000 {
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reg = <0x00021000 0x1000>;
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