linux-kernel - Re: [PATCH v1 05/11] ARM: nvidia: tf701t: add Bluetooth node

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Message-ID: <iyoa64mxxi47azcvv6fuljsyjlhv3ltf5gajc4yts3uryye2na@mbhnyt2es7xt>
Date: Thu, 29 Aug 2024 17:27:52 +0200
From: Thierry Reding <thierry.reding@...il.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc: Svyatoslav Ryhel <clamor95@...il.com>, 
	Rob Herring <robh+dt@...nel.org>, Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, 
	Conor Dooley <conor+dt@...nel.org>, Jonathan Hunter <jonathanh@...dia.com>, 
	devicetree@...r.kernel.org, linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 05/11] ARM: nvidia: tf701t: add Bluetooth node

On Tue, Aug 06, 2024 at 03:33:58PM GMT, Krzysztof Kozlowski wrote:
> On 06/08/2024 14:39, Svyatoslav Ryhel wrote:
> > Add serial node along with bluetooth node to ASUS TF701T device-tree.
> > 
> > Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
> > ---
> >  .../boot/dts/nvidia/tegra114-asus-tf701t.dts  | 28 ++++++++++++++++++-
> >  1 file changed, 27 insertions(+), 1 deletion(-)
> > 
> > diff --git a/arch/arm/boot/dts/nvidia/tegra114-asus-tf701t.dts b/arch/arm/boot/dts/nvidia/tegra114-asus-tf701t.dts
> > index fe1772250a85..00c3325878b9 100644
> > --- a/arch/arm/boot/dts/nvidia/tegra114-asus-tf701t.dts
> > +++ b/arch/arm/boot/dts/nvidia/tegra114-asus-tf701t.dts
> > @@ -1111,7 +1111,33 @@ serial@...06040 {
> >  	};
> >  
> >  	serial@...06200 {
> > -		/* Bluetooth */
> > +		compatible = "nvidia,tegra114-hsuart", "nvidia,tegra30-hsuart";
> 
> Why do you override compatible? Boards do not come with different SoCs,
> do they?

Just to clarify this: it's not being overridden because the SoC is
different but because for Bluetooth we need to enable the high-speed
UART mode of these devices, as opposed to the standard UART mode used
for regular serial ports.

Thierry

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