linux-kernel - Re: [PATCH 2/2] arm64: dts: broadcom: bcmbca: bcm4908: Add DT for Zyxel EX3510-B

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Message-ID: <d6cfbefa-7526-4a8b-bb81-66f198de1395@broadcom.com>
Date: Fri, 4 Oct 2024 09:11:11 -0700
From: Florian Fainelli <florian.fainelli@...adcom.com>
To: Sam Edwards <cfsworks@...il.com>, Rafał Miłecki
 <rafal@...ecki.pl>, William Zhang <william.zhang@...adcom.com>,
 Anand Gore <anand.gore@...adcom.com>, Kursad Oney <kursad.oney@...adcom.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: dts: broadcom: bcmbca: bcm4908: Add DT for
 Zyxel EX3510-B

On 10/3/24 15:08, Sam Edwards wrote:
> Zyxel EX3510-B is a WiFi 6 capable home gateway (family) based on the
> BCM4906 SoC, with 512MiB of RAM and 512MiB of NAND flash. WiFi support
> consists of a BCM6710 and a BCM6715 attached to separate PCIe buses.
> 
> Add an initial devicetree for this system, with support for:
> - Onboard UART (per base dtsi)
> - USB (2.0 only; superspeed devices are treated as high-speed due to an
>      unknown cause)
> - Both buttons (rear reset, front WPS)
> - Almost all LEDs:
>    - Power (red/green)
>    - Internet (red/green)
>    - WAN (green)
>    - LAN (green; anode is connected to GPIO 13 so currently
>        nonfunctioning)
>    - USB (green)
>    - WPS button (red/green)
>    - Absent in DT: There are 2.4GHz/5.0GHz WiFi status LEDs connected to
>        the WiFi chips instead of the SoC.
> - NAND flash
> - Embedded Ethernet switch
> - Factory-programmed Ethernet MAC address
> 
> WiFi cannot be enabled at this time due to Linux lacking drivers for
> both the PCIe controllers and the PCIe WiFi peripherals.

On the topic of PCIe, AFAICT Rafal had made an attempt at modifying 
pcie-brcmstb.c, which is really the same IP, or rather a fork of it. Let 
me know if you need help in figuring out the programming and we can help 
with that.
-- 
Florian