From: Arseniy Krasnov <avkrasnov@salutedevices.com>
To: Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Conor Dooley <conor+dt@kernel.org>,
Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: <linux-mtd@lists.infradead.org>, <devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-amlogic@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <oxffffaa@gmail.com>,
<kernel@sberdevices.ru>
Subject: Re: [PATCH v6 1/3] dt-bindings: mtd: amlogic,meson-nand: support fields for boot ROM code
Date: Mon, 13 May 2024 13:10:34 +0300 [thread overview]
Message-ID: <8769f323-fbff-bd75-a1f5-7ec789639b82@salutedevices.com> (raw)
In-Reply-To: <20240507230903.3399594-2-avkrasnov@salutedevices.com>
Changelog:
v5 -> v6:
* Update description in 'yaml' and commit message by adding more details
about such special Meson mode. R-b was removed so.
Thanks, Arseniy
On 08.05.2024 02:09, Arseniy Krasnov wrote:
> Boot ROM code on Meson requires that some pages on NAND must be written
> in special mode: "short" ECC mode where each block is 384 bytes and
> scrambling mode is on. Such pages are located on the chip in the
> following way (for example):
>
> [ p0 ][ p1 ][ p2 ][ p3 ][ p4 ][ p5 ][ p6 ][ p7 ] ... [ pN ]
> ^ ^ ^ ^
>
> pX is page number "X". "^" means "special" page used by boot ROM - e.g.
> every 2nd page in the range of [0, 7]. Step (2 in example is set by
> 'amlogic,boot-page-step' field. Last page in range (7 in example) is
> set by 'amlogic,boot-pages' field.
>
> Signed-off-by: Arseniy Krasnov <avkrasnov@salutedevices.com>
> ---
> .../bindings/mtd/amlogic,meson-nand.yaml | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> index 57b6957c8415..284f0f882c32 100644
> --- a/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> +++ b/Documentation/devicetree/bindings/mtd/amlogic,meson-nand.yaml
> @@ -64,11 +64,29 @@ patternProperties:
> items:
> maximum: 0
>
> + amlogic,boot-pages:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description:
> + Number of pages starting from offset 0, where a special ECC
> + configuration must be used because it is accessed by the ROM
> + code. This ECC configuration uses 384 bytes data blocks.
> + Also scrambling mode is enabled for such pages.
> +
> + amlogic,boot-page-step:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description:
> + Interval between pages, accessed by the ROM code. For example
> + we have 8 pages [0, 7]. Pages 0,2,4,6 are accessed by the
> + ROM code, so this field will be 2 (e.g. every 2nd page). Rest
> + of pages - 1,3,5,7 are read/written without this mode.
> +
> unevaluatedProperties: false
>
> dependencies:
> nand-ecc-strength: [nand-ecc-step-size]
> nand-ecc-step-size: [nand-ecc-strength]
> + amlogic,boot-pages: [nand-is-boot-medium, "amlogic,boot-page-step"]
> + amlogic,boot-page-step: [nand-is-boot-medium, "amlogic,boot-pages"]
>
>
> required:
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next prev parent reply other threads:[~2024-05-13 10:21 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-07 23:09 [PATCH v6 0/3] Meson: R/W support for pages used by boot ROM Arseniy Krasnov
2024-05-07 23:09 ` [PATCH v6 1/3] dt-bindings: mtd: amlogic,meson-nand: support fields for boot ROM code Arseniy Krasnov
2024-05-08 14:09 ` Rob Herring (Arm)
[not found] ` <CAP_G_RUdN+6OcsQZUkqWQMYoH-ZvmPnskT3yONK_YssqUYhm9Q@mail.gmail.com>
2024-05-12 17:26 ` Arseniy Krasnov
2024-05-13 9:05 ` Krzysztof Kozlowski
2024-05-13 10:10 ` Arseniy Krasnov [this message]
2024-05-27 12:19 ` Miquel Raynal
2024-05-07 23:09 ` [PATCH v6 2/3] mtd: rawnand: meson: refactor use of 'meson_nfc_cmd_access()' Arseniy Krasnov
2024-05-27 12:19 ` Miquel Raynal
2024-05-07 23:09 ` [PATCH v6 3/3] mtd: rawnand: meson: read/write access for boot ROM pages Arseniy Krasnov
2024-05-27 12:18 ` Miquel Raynal
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