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Message-ID: <20240203-expenses-tarmac-c564bc7ae34f@spud>
Date: Sat, 3 Feb 2024 14:49:50 +0000
From: Conor Dooley <conor@...nel.org>
To: William Zhang <william.zhang@...adcom.com>
Cc: Linux MTD List <linux-mtd@...ts.infradead.org>,
Linux ARM List <linux-arm-kernel@...ts.infradead.org>,
Broadcom Kernel List <bcm-kernel-feedback-list@...adcom.com>,
f.fainelli@...il.com, kursad.oney@...adcom.com,
joel.peshkin@...adcom.com, anand.gore@...adcom.com, dregan@...l.com,
kamal.dasu@...adcom.com, tomer.yacoby@...adcom.com,
dan.beygelman@...adcom.com, devicetree@...r.kernel.org,
Brian Norris <computersforpeace@...il.com>,
linux-kernel@...r.kernel.org, Conor Dooley <conor+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Vignesh Raghavendra <vigneshr@...com>,
Miquel Raynal <miquel.raynal@...tlin.com>,
Richard Weinberger <richard@....at>,
Kamal Dasu <kdasu.kdev@...il.com>, Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v4 03/12] dt-bindings: mtd: brcmnand: Add ecc strap
property
On Fri, Feb 02, 2024 at 04:28:24PM -0800, William Zhang wrote:
> Add brcm,nand-ecc-use-strap to get ecc and spare area size settings from
> board boot strap for broadband board designs because they do not specify
> ecc setting in dts but rather using the strap setting.
>
> Signed-off-by: William Zhang <william.zhang@...adcom.com>
>
> ---
>
> Changes in v4:
> - Move ecc strap property to this separate patch and remove some
> non-binding related text from the description
>
> Changes in v3: None
> Changes in v2: None
>
> Documentation/devicetree/bindings/mtd/brcm,brcmnand.yaml | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/mtd/brcm,brcmnand.yaml b/Documentation/devicetree/bindings/mtd/brcm,brcmnand.yaml
> index d0168d55c73e..2599d902ec3a 100644
> --- a/Documentation/devicetree/bindings/mtd/brcm,brcmnand.yaml
> +++ b/Documentation/devicetree/bindings/mtd/brcm,brcmnand.yaml
> @@ -147,6 +147,14 @@ patternProperties:
> layout.
> $ref: /schemas/types.yaml#/definitions/uint32
>
> + brcm,nand-ecc-use-strap:
> + description:
> + This flag indicates the ecc strength and spare area size should
> + be retrieved from the SoC NAND boot strap setting instead of
> + nand-ecc-strength and brcm,nand-oob-sector-size or auto detection.
I'm still on the fence about this being overly prescriptive about the
operating systems behaviour. I think it would be good to say why the
strap values are better than those explicitly provided in DT rather than
just saying "these strap values should be used".
> + This is commonly used by the BCMBCA SoC board design.
> + $ref: /schemas/types.yaml#/definitions/flag
> +
> unevaluatedProperties: false
>
> allOf:
> --
> 2.37.3
>
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