linux-kernel - Re: [PATCH v2 09/12] dt-bindings: memory-controllers: Convert fsl,elbc to YAML

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Message-ID: <Z6kU9G4u3BbBJn5p@buserror.net>
Date: Sun, 9 Feb 2025 14:49:56 -0600
From: Crystal Wood <oss@...error.net>
To: j.ne@...teo.net
Cc: devicetree@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
	Krzysztof Kozlowski <krzk@...nel.org>, imx@...ts.linux.dev,
	Madhavan Srinivasan <maddy@...ux.ibm.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	Nicholas Piggin <npiggin@...il.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Naveen N Rao <naveen@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Damien Le Moal <dlemoal@...nel.org>,
	Niklas Cassel <cassel@...nel.org>,
	Herbert Xu <herbert@...dor.apana.org.au>,
	"David S. Miller" <davem@...emloft.net>, Lee Jones <lee@...nel.org>,
	Vinod Koul <vkoul@...nel.org>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	J. Neuschäfer <j.neuschaefer@....net>,
	Wim Van Sebroeck <wim@...ux-watchdog.org>,
	Guenter Roeck <linux@...ck-us.net>, Mark Brown <broonie@...nel.org>,
	Miquel Raynal <miquel.raynal@...tlin.com>,
	Richard Weinberger <richard@....at>,
	Vignesh Raghavendra <vigneshr@...com>, linux-kernel@...r.kernel.org,
	linux-ide@...r.kernel.org, linux-crypto@...r.kernel.org,
	dmaengine@...r.kernel.org, linux-pci@...r.kernel.org,
	linux-watchdog@...r.kernel.org, linux-spi@...r.kernel.org,
	linux-mtd@...ts.infradead.org, Li Yang <leoyang.li@....com>,
	John Ogness <john.ogness@...utronix.de>
Subject: Re: [PATCH v2 09/12] dt-bindings: memory-controllers: Convert
 fsl,elbc to YAML

On Sun, Feb 09, 2025 at 02:31:35PM -0600, Crystal Wood wrote:
> On Fri, Feb 07, 2025 at 10:30:26PM +0100, J. Neuschäfer via B4 Relay wrote:
> > +        simple-periph@2,0 {
> > +            compatible = "fsl,elbc-gpcm-uio";
> > +            reg = <0x2 0x0 0x10000>;
> > +            elbc-gpcm-br = <0xfd810800>;
> > +            elbc-gpcm-or = <0xffff09f7>;
> > +        };
> 
> I know this isn't new, but... since we're using this as an example,
> where is the documentation for this fsl,elbc-gpcm-uio and
> elbc-gpcm-br/or?  What exactly is a simple-periph?
> 
> There are no in-tree device trees that use this either.  The bcsr
> node was actually a much more normal example, despite that particular
> platform having been removed.  There are other bcsr nodes that still
> exist that could be used instead.

OK, I noticed patch 10 after I sent this :-P

Seems I didn't like it too much when it was new either:
https://lkml.org/lkml/2014/12/9/530

And it's still a bad example for how GPCM devices on this bus should
normally be represented.

-Crystal