linux-kernel - Re: [PATCH v2] dt-bindings: mtd: drop mtd/cortina,gemini-flash.txt

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Message-ID: <YgUSs3uIgpb91UgD@Red>
Date:   Thu, 10 Feb 2022 14:27:15 +0100
From:   LABBE Corentin <clabbe@...libre.com>
To:     Rob Herring <robh@...nel.org>
Cc:     linus.walleij@...aro.org, miquel.raynal@...tlin.com,
        richard@....at, vigneshr@...com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mtd@...ts.infradead.org
Subject: Re: [PATCH v2] dt-bindings: mtd: drop mtd/cortina,gemini-flash.txt

Le Wed, Feb 09, 2022 at 03:18:41PM -0600, Rob Herring a écrit :
> On Mon, Jan 31, 2022 at 08:08:58AM +0000, Corentin Labbe wrote:
> > Drop mtd/cortina,gemini-flash.txt since it is nearly already handled by
> > Documentation/devicetree/bindings/mtd/mtd-physmap.yaml.
> > 
> > Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> > Signed-off-by: Corentin Labbe <clabbe@...libre.com>
> > ---
> > Change since v1:
> > - fixed typo on syscon
> > 
> >  .../bindings/mtd/cortina,gemini-flash.txt     | 24 -------------------
> >  .../devicetree/bindings/mtd/mtd-physmap.yaml  | 18 +++++++++++++-
> >  2 files changed, 17 insertions(+), 25 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/mtd/cortina,gemini-flash.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/mtd/cortina,gemini-flash.txt b/Documentation/devicetree/bindings/mtd/cortina,gemini-flash.txt
> > deleted file mode 100644
> > index efa5b2aba829..000000000000
> > --- a/Documentation/devicetree/bindings/mtd/cortina,gemini-flash.txt
> > +++ /dev/null
> > @@ -1,24 +0,0 @@
> > -Flash device on Cortina Systems Gemini SoC
> > -
> > -This flash is regular CFI compatible (Intel or AMD extended) flash chips with
> > -some special bits that can be controlled by the machine's system controller.
> > -
> > -Required properties:
> > -- compatible : must be "cortina,gemini-flash", "cfi-flash";
> > -- reg : memory address for the flash chip
> > -- syscon : must be a phandle to the system controller
> > -- bank-width : width in bytes of flash interface, should be <2>
> > -
> > -For the rest of the properties, see mtd-physmap.yaml.
> > -
> > -The device tree may optionally contain sub-nodes describing partitions of the
> > -address space. See partition.txt for more detail.
> > -
> > -Example:
> > -
> > -flash@...00000 {
> > -	compatible = "cortina,gemini-flash", "cfi-flash";
> > -	reg = <0x30000000 0x01000000>;
> > -	syscon = <&syscon>;
> > -	bank-width = <2>;
> > -};
> > diff --git a/Documentation/devicetree/bindings/mtd/mtd-physmap.yaml b/Documentation/devicetree/bindings/mtd/mtd-physmap.yaml
> > index f827984936f6..82eb4e0f453b 100644
> > --- a/Documentation/devicetree/bindings/mtd/mtd-physmap.yaml
> > +++ b/Documentation/devicetree/bindings/mtd/mtd-physmap.yaml
> > @@ -44,7 +44,9 @@ properties:
> >                - numonyx,js28f128
> >                - sst,sst39vf320
> >                - xlnx,xps-mch-emc-2.00.a
> > -          - const: cfi-flash
> > +          - enum:
> > +              - cfi-flash
> > +              - jedec-flash
> 
> Why is jedec-flash being added? The old doc made no mention of it.
> 

Because one board (gemini-dlink-dns-313.dts) use it.
See commit a10d862e585e06aacc3a03e230fdf8faf6b1caf0 
"""
The flash on the DNS-313 needs to be probed as JEDEC, it does
    not conform to the common CFI standard.
"""

I will add this (the addition of jedec-flash) in commmit log.

Regards