From: Aurelien Jarno <aurelien@aurel32.net>
To: Troy Mitchell <troy.mitchell@linux.spacemit.com>
Cc: linux-kernel@vger.kernel.org, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Alexandre Ghiti <alex@ghiti.fr>, Yixun Lan <dlan@gentoo.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
"open list:RISC-V ARCHITECTURE" <linux-riscv@lists.infradead.org>,
"open list:RISC-V SPACEMIT SoC Support"
<spacemit@lists.linux.dev>
Subject: Re: [PATCH 2/3] riscv: dts: spacemit: add 24c02 eeprom on BPI-F3
Date: Tue, 23 Sep 2025 21:21:40 +0200 [thread overview]
Message-ID: <aNLzRJcKCYOngc7z@aurel32.net> (raw)
In-Reply-To: <6CF6078CFA2EB2F4+aNH_RmNkM_hnsAYu@LT-Guozexi>
Hi,
On 2025-09-23 10:00, Troy Mitchell wrote:
> On Sun, Sep 21, 2025 at 11:01:42PM +0200, Aurelien Jarno wrote:
> > The BPI-F3 contains a 24c02 eeprom, that contains among other things the
> > MAC addresses of the two network interfaces. For this reason, mark it as
> > read-only.
> >
> > Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
> > ---
> > arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 11 ++++++++++-
> > 1 file changed, 10 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
> > index 3b6e4f52e9aad..574d10fdf9b82 100644
> > --- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
> > +++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
> > @@ -115,6 +115,15 @@ &i2c2 {
> > pinctrl-0 = <&i2c2_0_cfg>;
> > pinctrl-names = "default";
> > status = "okay";
> > +
> > + eeprom@50 {
> > + compatible = "atmel,24c02";
> > + reg = <0x50>;
> > + vcc-supply = <&vcc1v8_sys>;
> > + pagesize = <16>;
> I'm not sure this is 16..
> Could you double check it?
Yes, this matches the datasheet:
https://www.giantec-semi.com/juchen1123/uploads/pdf/GT24C02_DS_Au.pdf
It says "Page Size: 16 bytes"
Aurelien
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
aurelien@aurel32.net http://aurel32.net
next prev parent reply other threads:[~2025-09-23 19:21 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-21 21:01 [PATCH 0/3] riscv: dts: spacemit: add 24c02 eeprom on BPI-F3 Aurelien Jarno
2025-09-21 21:01 ` [PATCH 1/3] riscv: dts: spacemit: enable the i2c2 adapter " Aurelien Jarno
2025-09-23 1:32 ` Troy Mitchell
2025-09-23 19:16 ` Aurelien Jarno
2025-09-24 3:13 ` Troy Mitchell
2025-09-24 19:11 ` Aurelien Jarno
2025-09-21 21:01 ` [PATCH 2/3] riscv: dts: spacemit: add 24c02 eeprom " Aurelien Jarno
2025-09-22 3:21 ` Yixun Lan
2025-09-22 4:49 ` Aurelien Jarno
2025-09-22 8:01 ` Yixun Lan
2025-09-22 21:00 ` Aurelien Jarno
2025-09-23 1:42 ` Troy Mitchell
2025-09-23 19:38 ` Aurelien Jarno
2025-09-23 2:00 ` Troy Mitchell
2025-09-23 19:21 ` Aurelien Jarno [this message]
2025-09-23 6:32 ` Vivian Wang
2025-09-23 19:30 ` Aurelien Jarno
2025-09-21 21:01 ` [PATCH 3/3] riscv: dts: spacemit: add i2c aliases " Aurelien Jarno
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