linux-kernel - Re: [PATCH 1/3] dt-bindings: sdhci-of-at91: new compatible string and update properties

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Message-ID: <20191008092826.63kbia2wkggeab74@M43218.corp.atmel.com>
Date:   Tue, 8 Oct 2019 11:28:27 +0200
From:   Ludovic Desroches <ludovic.desroches@...rochip.com>
To:     Rob Herring <robh@...nel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-mmc@...r.kernel.org>,
        <ulf.hansson@...aro.org>, <nicolas.ferre@...rochip.com>,
        <adrian.hunter@...el.com>, <linux-kernel@...r.kernel.org>,
        <mark.rutland@....com>, <claudiu.beznea@...rochip.com>
Subject: Re: [PATCH 1/3] dt-bindings: sdhci-of-at91: new compatible string
 and update properties

On Mon, Sep 30, 2019 at 09:56:13AM -0500, Rob Herring wrote:
> On Thu, Sep 12, 2019 at 10:09:06PM +0200, Ludovic Desroches wrote:
> > There is a new compatible string for the SAM9X60 sdhci device. It involves
> > an update of the properties about the clocks stuff.
> > 
> > Signed-off-by: Ludovic Desroches <ludovic.desroches@...rochip.com>
> > ---
> >  .../devicetree/bindings/mmc/sdhci-atmel.txt   | 25 ++++++++++++++++---
> >  1 file changed, 22 insertions(+), 3 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/mmc/sdhci-atmel.txt b/Documentation/devicetree/bindings/mmc/sdhci-atmel.txt
> > index 1b662d7171a0..364ceea330b6 100644
> > --- a/Documentation/devicetree/bindings/mmc/sdhci-atmel.txt
> > +++ b/Documentation/devicetree/bindings/mmc/sdhci-atmel.txt
> > @@ -5,12 +5,19 @@ Documentation/devicetree/bindings/mmc/mmc.txt and the properties used by the
> >  sdhci-of-at91 driver.
> >  
> >  Required properties:
> > -- compatible:		Must be "atmel,sama5d2-sdhci".
> > +- compatible:		Must be "atmel,sama5d2-sdhci" or "microchip,sam9x60-sdhci".
> >  - clocks:		Phandlers to the clocks.
> > -- clock-names:		Must be "hclock", "multclk", "baseclk";
> > +- clock-names:		Must be "hclock", "multclk", "baseclk" for
> > +			"atmel,sama5d2-sdhci".
> > +			Must be "hclock", "multclk" for "microchip,sam9x60-sdhci".
> >  
> > +Optional properties:
> > +- assigned-clocks:	The same with "multclk".
> > +- assigned-clock-rates	The rate of "multclk" in order to not rely on the
> > +			gck configuration set by previous components.
> >  
> > -Example:
> > +
> > +Examples:
> >  
> >  sdmmc0: sdio-host@...00000 {
> >  	compatible = "atmel,sama5d2-sdhci";
> > @@ -18,4 +25,16 @@ sdmmc0: sdio-host@...00000 {
> >  	interrupts = <31 IRQ_TYPE_LEVEL_HIGH 0>;
> >  	clocks = <&sdmmc0_hclk>, <&sdmmc0_gclk>, <&main>;
> >  	clock-names = "hclock", "multclk", "baseclk";
> > +	assigned-clocks = <&sdmmc0_gclk>;
> > +	assigned-clock-rates = <480000000>;
> > +};
> > +
> > +sdmmc0: sdio-host@...00000 {
> 
> mmc@...
> 
> Though I don't see much value in a second example. Examples are not a 
> complete enumeration of all possible dts entries.
> 

Ok, I'll skip this example.

Ludovic

> > +	compatible = "microchip,sam9x60-sdhci";
> > +	reg = <0x80000000 0x300>;
> > +	interrupts = <12 IRQ_TYPE_LEVEL_HIGH 0>;
> > +	clocks = <&pmc PMC_TYPE_PERIPHERAL 12>, <&pmc PMC_TYPE_GCK 12>;
> > +	clock-names = "hclock", "multclk";
> > +	assigned-clocks = <&pmc PMC_TYPE_GCK 12>;
> > +	assigned-clock-rates = <100000000>;
> >  };
> > -- 
> > 2.23.0
> >