netdev - Re: [PATCH v1] arm: dts: st: stm32mp151a-prtt1l: Fix QSPI configuration

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Message-ID: <ZtADV2hHgbF9HI08@pengutronix.de>
Date: Thu, 29 Aug 2024 07:12:55 +0200
From: Oleksij Rempel <o.rempel@...gutronix.de>
To: Alexandre TORGUE <alexandre.torgue@...s.st.com>
Cc: Ahmad Fatoum <a.fatoum@...gutronix.de>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, devicetree@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel@...gutronix.de, linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v1] arm: dts: st: stm32mp151a-prtt1l: Fix QSPI
 configuration

Hi Alexandre,

On Tue, Aug 27, 2024 at 10:07:10AM +0200, Alexandre TORGUE wrote:
> Hi
> 
> On 8/7/24 11:38, Ahmad Fatoum wrote:
> > Hello Oleksij,
> > 
> > On 06.08.24 14:05, Oleksij Rempel wrote:
> > > Rename 'pins1' to 'pins' in the qspi_bk1_pins_a node to correct the
> > > subnode name. The previous name caused the configuration to be
> > > applied to the wrong subnode, resulting in QSPI not working properly.
> > > 
> > > Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> > > ---
> > >   arch/arm/boot/dts/st/stm32mp151a-prtt1l.dtsi | 2 +-
> > >   1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/arch/arm/boot/dts/st/stm32mp151a-prtt1l.dtsi b/arch/arm/boot/dts/st/stm32mp151a-prtt1l.dtsi
> > > index 3938d357e198f..4db684478c320 100644
> > > --- a/arch/arm/boot/dts/st/stm32mp151a-prtt1l.dtsi
> > > +++ b/arch/arm/boot/dts/st/stm32mp151a-prtt1l.dtsi
> > > @@ -123,7 +123,7 @@ flash@0 {
> > >   };
> > >   &qspi_bk1_pins_a {
> > > -	pins1 {
> > > +	pins {
> > 
> > As you have seen such device tree overriding is error prone and would
> > be entirely avoidable if specifying full board-specific pinctrl groups
> > was allowed for the stm32 platforms instead of override-and-pray.
> 
> You can create your own pin group in stm32mp15-pinctlr.dtsi. What is the
> issue ? Do I miss something ? It will avoid to overwrite an existing
> configuration

There are mostly one one properly change (pull up), not really worth adding a
new sub node.

Regards,
Oleksij
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