linux-kernel - Re: [PATCH] dt-bindings: mtd: spi-nor: Convert to DT schema format

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Date:   Tue, 16 Feb 2021 10:12:59 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Rob Herring <robh@...nel.org>
Cc:     "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        Richard Weinberger <richard@....at>,
        MTD Maling List <linux-mtd@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: Re: [PATCH] dt-bindings: mtd: spi-nor: Convert to DT schema format

Hi Rob,

On Tue, Feb 2, 2021 at 6:54 PM Rob Herring <robh@...nel.org> wrote:
> Convert the SPI-NOR binding to DT schema format. Like other memory chips,
> the compatible strings are a mess with vendor prefixes not being used
> consistently and some compatibles not documented. The resulting schema
> passes on 'compatible' checks for most in tree users with the exception
> of some oddballs.
>
> I dropped the 'm25p.*-nonjedec' compatible strings as these don't appear
> to be used anywhere.
>
> Cc: Miquel Raynal <miquel.raynal@...tlin.com>
> Cc: Richard Weinberger <richard@....at>
> Cc: Vignesh Raghavendra <vigneshr@...com>
> Cc: linux-mtd@...ts.infradead.org
> Signed-off-by: Rob Herring <robh@...nel.org>

Thanks for your patch!

> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mtd/jedec,spi-nor.yaml
> @@ -0,0 +1,102 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mtd/jedec,spi-nor.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: SPI NOR flash ST M25Pxx (and similar) serial flash chips
> +
> +maintainers:
> +  - Rob Herring <robh@...nel.org>
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - items:
> +          - pattern: "^((((micron|spansion|st),)?\
> +              (m25p(40|80|16|32|64|128)|\
> +              n25q(32b|064|128a11|128a13|256a|512a|164k)))|\
> +              atmel,at25df(321a|641|081a)|\
> +              everspin,mr25h(10|40|128|256)|\
> +              (mxicy|macronix),mx25l(4005a|1606e|6405d|8005|12805d|25635e)|\
> +              (mxicy|macronix),mx25u(4033|4035)|\
> +              (spansion,)?s25fl(128s|256s1|512s|008k|064k|164k)|\
> +              (sst|microchip),sst25vf(016b|032b|040b)|\
> +              (sst,)?sst26wf016b|\
> +              (sst,)?sst25wf(040b|080)|\
> +              winbond,w25x(80|32)|\
> +              (winbond,)?w25q(16|32(w|dw)?|64(dw)?|80bl|128(fw)?|256))$"
> +          - const: jedec,spi-nor
> +      - items:
> +          - enum:
> +              - issi,is25lp016d
> +              - micron,mt25qu02g
> +              - mxicy,mx25r1635f
> +              - mxicy,mx25u6435f
> +              - mxicy,mx25v8035f
> +              - spansion,s25sl12801
> +              - spansion,s25fs512s
> +          - const: jedec,spi-nor
> +      - const: jedec,spi-nor
> +    description:
> +      Must also include "jedec,spi-nor" for any SPI NOR flash that can be
> +      identified by the JEDEC READ ID opcode (0x9F).

Is there any value in keeping this paragraph?
The schema already requires "jedec,spi-nor".

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds