linux-kernel - Re: [PATCH 2/3] riscv: dts: spacemit: add 24c02 eeprom on BPI-F3

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Message-ID: <aNL3GnfqVGyS9AL-@aurel32.net>
Date: Tue, 23 Sep 2025 21:38:02 +0200
From: Aurelien Jarno <aurelien@...el32.net>
To: Troy Mitchell <troy.mitchell@...ux.spacemit.com>
Cc: Yixun Lan <dlan@...too.org>, linux-kernel@...r.kernel.org,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@...r.kernel.org>,
	"open list:RISC-V ARCHITECTURE" <linux-riscv@...ts.infradead.org>,
	"open list:RISC-V SPACEMIT SoC Support" <spacemit@...ts.linux.dev>
Subject: Re: [PATCH 2/3] riscv: dts: spacemit: add 24c02 eeprom on BPI-F3

Hi Troy,

On 2025-09-23 09:42, Troy Mitchell wrote:
> On Mon, Sep 22, 2025 at 06:49:35AM +0200, Aurelien Jarno wrote:
> > On 2025-09-22 11:21, Yixun Lan wrote:
> > It seems to only contains board infos (mac addresses), but if there are 
> > other use cases, that can indeed be dropped.
> Then you can split the EEPROM into different parts.
> Each part can be described as an individual nvmem cell in the device tree.
> Some of them can be marked as read-only, while others remain writable.
> 
> Documentation/devicetree/bindings/eeprom/at24.yaml +15:
> ```
>   - $ref: /schemas/nvmem/nvmem-deprecated-cells.yaml
> ```

As pointed by Vivian the best for that is to use "onie,tlv-layout". I'll 
do that in the V2.

Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@...el32.net                     http://aurel32.net