linux-kernel - Re: [PATCH v6 2/2] dt-bindings: mtd: Document Macronix raw NAND controller bindings

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Date:   Thu, 1 Aug 2019 11:23:43 +0200
From:   Boris Brezillon <boris.brezillon@...labora.com>
To:     masonccyang@...c.com.tw
Cc:     anders.roxell@...aro.org, bbrezillon@...nel.org,
        christophe.kerello@...com, computersforpeace@...il.com,
        devicetree@...r.kernel.org, dwmw2@...radead.org,
        juliensu@...c.com.tw, lee.jones@...aro.org, liang.yang@...ogic.com,
        linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org,
        marek.vasut@...il.com, mark.rutland@....com,
        miquel.raynal@...tlin.com, paul@...pouillou.net,
        paul.burton@...s.com, richard@....at, robh+dt@...nel.org,
        stefan@...er.ch, vigneshr@...com
Subject: Re: [PATCH v6 2/2] dt-bindings: mtd: Document Macronix raw NAND
 controller bindings

On Thu, 1 Aug 2019 17:17:29 +0800
masonccyang@...c.com.tw wrote:

> Hi Boris,
> 
> > On Thu,  1 Aug 2019 11:55:10 +0800
> > Mason Yang <masonccyang@...c.com.tw> wrote:
> >   
> > > Document the bindings used by the Macronix raw NAND controller.
> > > 
> > > Signed-off-by: Mason Yang <masonccyang@...c.com.tw>
> > > ---
> > >  Documentation/devicetree/bindings/mtd/mxic-nand.txt | 19   
> +++++++++++++++++++
> > >  1 file changed, 19 insertions(+)
> > >  create mode 100644   
> Documentation/devicetree/bindings/mtd/mxic-nand.txt
> > > 
> > > diff --git a/Documentation/devicetree/bindings/mtd/mxic-nand.txt b/  
> > Documentation/devicetree/bindings/mtd/mxic-nand.txt  
> > > new file mode 100644
> > > index 0000000..de37d60
> > > --- /dev/null
> > > +++ b/Documentation/devicetree/bindings/mtd/mxic-nand.txt
> > > @@ -0,0 +1,19 @@
> > > +Macronix Raw NAND Controller Device Tree Bindings
> > > +-------------------------------------------------
> > > +
> > > +Required properties:
> > > +- compatible: should be "mxicy,multi-itfc-v009-nand-morph"
> > > +- reg: should contain 1 entry for the registers
> > > +- interrupts: interrupt line connected to this raw NAND controller
> > > +- clock-names: should contain "ps", "send" and "send_dly"
> > > +- clocks: should contain 3 phandles for the "ps", "send" and
> > > +    "send_dly" clocks
> > > +
> > > +Example:
> > > +
> > > +   nand: nand-controller@...30000 {
> > > +      compatible = "mxicy,multi-itfc-v009-nand-morph";
> > > +      reg = <0x43c30000 0x10000>;
> > > +      clocks = <&clkwizard 0>, <&clkwizard 1>, <&clkc 15>;
> > > +      clock-names = "send", "send_dly", "ps";  
> > 
> > You should have subnodes describing the NAND connected to the
> > controller (see [1]).
> > 
> > [1]  
> https://elixir.bootlin.com/linux/v5.3-rc2/source/Documentation/devicetree/
> > bindings/mtd/nand-controller.yaml#L131
> >   
> > > +   };  
> >   
> 
> Do you mean to add patternProperties ?
> 
>                  nand: nand-controller@...30000 {
>                                  compatible = 
> "mxicy,multi-itfc-v009-nand-morph";
>                                  reg = <0x43c30000 0x10000>;
>                                  clocks = <&clkwizard 0>, <&clkwizard 1>, 
> <&clkc 15>;
>                                  clock-names = "send", "send_dly", "ps";
> 

				#address-cells = <1>;
				#size-cells = <0>;

> +                               nand@0 {
> +
					reg = <0>;
					/* nand props here */

> +                               };
>                  };
> 
> something like that.

Yes, something like that.