Re: [PATCH v2 5/5] arm64: dts: ti: hummingboard-t: add descriptions for m.2 pci-e and usb-3

[Josua Mayer]

Am 12.01.24 um 18:58 schrieb Andrew Davis:
> On 1/12/24 11:12 AM, Josua Mayer wrote:
>> diff --git a/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t-pcie.dts b/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t-pcie.dts
>> new file mode 100644
>> index 000000000000..5ba0029fcfb9
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/ti/k3-am642-hummingboard-t-pcie.dts
>> @@ -0,0 +1,31 @@
>> +// SPDX-License-Identifier: GPL-2.0+
>> +/*
>> + * Copyright (C) 2023 Josua Mayer <josua@xxxxxxxxxxxxx>
>> + *
>> + * DTS for SolidRun AM642 HummingBoard-T,
>> + * running on Cortex A53, with PCI-E.
>> + *
>> + */
>> +
>> +#include "k3-am642-hummingboard-t.dts"
>
> Avoid including .dts files, if this file is for an option that
> can be chosen (PCIe vs USB3), then it should be a DT overlay.
>
>> +#include "k3-serdes.h"
>> +
>> +/ {
>> +    model = "SolidRun AM642 HummingBoard-T with PCI-E";
>> +};
>> +
>> +&pcie0_rc {
>> +    status = "okay";
>
> If PCIe is only available here when using this add-on then
> all of the node data should be in this add-on file.
That is correct, add-on file seems appropriate.

It is the same hardware, merely a different choice for signal routing.

Thanks! - sincerely
Josua Mayer