linux-kernel - Re: [PATCH v2 3/9] arm64: dts: bcmbca: update BCM4908 board dts files

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Date:   Mon, 25 Jul 2022 17:32:38 -0600
From:   Rob Herring <robh@...nel.org>
To:     William Zhang <william.zhang@...adcom.com>
Cc:     Linux ARM List <linux-arm-kernel@...ts.infradead.org>,
        joel.peshkin@...adcom.com, f.fainelli@...il.com,
        Broadcom Kernel List <bcm-kernel-feedback-list@...adcom.com>,
        dan.beygelman@...adcom.com, anand.gore@...adcom.com,
        kursad.oney@...adcom.com, rafal@...ecki.pl,
        krzysztof.kozlowski@...aro.org,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/9] arm64: dts: bcmbca: update BCM4908 board dts files

On Sun, Jul 24, 2022 at 10:53:56PM -0700, William Zhang wrote:
> Append "brcm,bcmbca" to compatible strings based on the new bcmbca
> binding rule for BCM4908 family based boards. This will break drivers
> that use the old compatible string for binding. Fortunately there is no
> such usage in linux and u-boot.

How does adding an additional compatible break things?

> 
> Signed-off-by: William Zhang <william.zhang@...adcom.com>
> Acked-by: Rafał Miłecki <rafal@...ecki.pl>
> 
> ---
> 
> Changes in v2:
> - Add Acked-by tag
> 
>  arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-netgear-r8000p.dts | 2 +-
>  .../dts/broadcom/bcm4908/bcm4906-tplink-archer-c2300-v1.dts     | 2 +-
>  arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts | 2 +-
>  .../arm64/boot/dts/broadcom/bcm4908/bcm4908-netgear-raxe500.dts | 2 +-
>  4 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-netgear-r8000p.dts b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-netgear-r8000p.dts
> index 2dd028438c22..d8b60575eb4f 100644
> --- a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-netgear-r8000p.dts
> +++ b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-netgear-r8000p.dts
> @@ -7,7 +7,7 @@
>  #include "bcm4906.dtsi"
>  
>  / {
> -	compatible = "netgear,r8000p", "brcm,bcm4906", "brcm,bcm4908";
> +	compatible = "netgear,r8000p", "brcm,bcm4906", "brcm,bcm4908", "brcm,bcmbca";
>  	model = "Netgear R8000P";
>  
>  	memory@0 {
> diff --git a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-tplink-archer-c2300-v1.dts b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-tplink-archer-c2300-v1.dts
> index 064f7f549665..296393d4aaab 100644
> --- a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-tplink-archer-c2300-v1.dts
> +++ b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4906-tplink-archer-c2300-v1.dts
> @@ -7,7 +7,7 @@
>  #include "bcm4906.dtsi"
>  
>  / {
> -	compatible = "tplink,archer-c2300-v1", "brcm,bcm4906", "brcm,bcm4908";
> +	compatible = "tplink,archer-c2300-v1", "brcm,bcm4906", "brcm,bcm4908", "brcm,bcmbca";
>  	model = "TP-Link Archer C2300 V1";
>  
>  	memory@0 {
> diff --git a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts
> index 04f8524b5335..787c7ddf9102 100644
> --- a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts
> +++ b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-asus-gt-ac5300.dts
> @@ -6,7 +6,7 @@
>  #include "bcm4908.dtsi"
>  
>  / {
> -	compatible = "asus,gt-ac5300", "brcm,bcm4908";
> +	compatible = "asus,gt-ac5300", "brcm,bcm4908", "brcm,bcmbca";
>  	model = "Asus GT-AC5300";
>  
>  	memory@0 {
> diff --git a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-netgear-raxe500.dts b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-netgear-raxe500.dts
> index 3c2cf2d238b6..23b96c663239 100644
> --- a/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-netgear-raxe500.dts
> +++ b/arch/arm64/boot/dts/broadcom/bcm4908/bcm4908-netgear-raxe500.dts
> @@ -3,7 +3,7 @@
>  #include "bcm4908.dtsi"
>  
>  / {
> -	compatible = "netgear,raxe500", "brcm,bcm4908";
> +	compatible = "netgear,raxe500", "brcm,bcm4908", "brcm,bcmbca";
>  	model = "Netgear RAXE500";
>  
>  	memory@0 {
> -- 
> 2.34.1
>