linux-kernel - Re: [PATCH v2 1/3] arm64: dts: rockchip: add overlay test for Edgeble NCM6A

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Message-ID: <433a8050-98b5-409b-97b5-00fe0e719a52@cherry.de>
Date: Mon, 20 Jan 2025 10:23:41 +0100
From: Quentin Schulz <quentin.schulz@...rry.de>
To: Michael Riesch <michael.riesch@...fvision.net>,
 Quentin Schulz <foss+kernel@...il.net>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Heiko Stuebner <heiko@...ech.de>,
 Jagan Teki <jagan@...eble.ai>, Niklas Cassel <cassel@...nel.org>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] arm64: dts: rockchip: add overlay test for Edgeble
 NCM6A

Hi Michael,

On 1/20/25 10:07 AM, Michael Riesch wrote:
> Hi Quentin,
> 
> On 1/16/25 15:47, Quentin Schulz wrote:
>> From: Quentin Schulz <quentin.schulz@...rry.de>
>>
>> The Edgeble NCM6A can have WiFi modules connected and this is handled
>> via an overlay (commit 951d6aaa37fe ("arm64: dts: rockchip: Add Edgeble
>> NCM6A WiFi6 Overlay")).
>>
>> In order to make sure the overlay is still valid in the future, let's
>> add a validation test by applying the overlay on top of the main base
>> at build time.
>>
>> Fixes: 951d6aaa37fe ("arm64: dts: rockchip: Add Edgeble NCM6A WiFi6 Overlay")
>> Signed-off-by: Quentin Schulz <quentin.schulz@...rry.de>
>> ---
>>   arch/arm64/boot/dts/rockchip/Makefile | 6 +++++-
>>   1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm64/boot/dts/rockchip/Makefile b/arch/arm64/boot/dts/rockchip/Makefile
>> index 86cc418a2255cdc22f1d503e9519d2d9572d4e9d..3f92d1a9d0b6efeee46ad4aff8c2b8ed3cb83d73 100644
>> --- a/arch/arm64/boot/dts/rockchip/Makefile
>> +++ b/arch/arm64/boot/dts/rockchip/Makefile
>> @@ -134,7 +134,6 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-armsom-w3.dtb
>>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-coolpi-cm5-evb.dtb
>>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-coolpi-cm5-genbook.dtb
>>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-edgeble-neu6a-io.dtb
>> -dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-edgeble-neu6a-wifi.dtbo
>>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-edgeble-neu6b-io.dtb
>>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-evb1-v10.dtb
>>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-friendlyelec-cm3588-nas.dtb
>> @@ -163,3 +162,8 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588s-orangepi-5.dtb
>>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588s-orangepi-5b.dtb
>>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588s-rock-5a.dtb
>>   dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588s-rock-5c.dtb
>> +
>> +# Overlays
>> +dtb-$(CONFIG_ARCH_ROCKCHIP) += rk3588-edgeble-neu6a-wifi.dtb
>> +
> 
> Maybe open a new section "# Compile time tests" or something like that?
> 

The above line is to compile the build-time test of overlay application 
(notice the missing o in the extension). This points at the target below 
(which ends with -dtbs), which does require the dtbo to exist. So 
essentially, they are both for the build-time test of applying (and 
generating) DTBO. I feel like this comment/section would add to the 
confusion? I may have misunderstood what you are suggesting, can you 
provide an example?

Cheers,
Quentin