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Wed, 22 Jul 2026 13:31:31 -0700 (PDT) From: Jennifer Berringer To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan Cc: devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org, Jennifer Berringer Subject: [PATCH 1/2] riscv: dts: spacemit: k3-com260: add eeprom on i2c2 Date: Wed, 22 Jul 2026 16:28:47 -0400 Message-ID: <20260722202848.1817988-2-jberring@redhat.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260722202848.1817988-1-jberring@redhat.com> References: <20260722202848.1817988-1-jberring@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Enable i2c2 on the K3 CoM260 compute module and use it for a 24c02 eeprom. This eeprom stores the product name, a MAC address, and a serial number. Signed-off-by: Jennifer Berringer --- arch/riscv/boot/dts/spacemit/k3-com260.dtsi | 32 +++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/arch/riscv/boot/dts/spacemit/k3-com260.dtsi b/arch/riscv/boot/= dts/spacemit/k3-com260.dtsi index a38d7b738258d..a6f160dca19de 100644 --- a/arch/riscv/boot/dts/spacemit/k3-com260.dtsi +++ b/arch/riscv/boot/dts/spacemit/k3-com260.dtsi @@ -26,6 +26,38 @@ reg_5v_sys: regulator-5v-sys { }; }; =20 +&i2c2 { + pinctrl-names =3D "default"; + pinctrl-0 =3D <&i2c2_1_cfg>; + status =3D "okay"; + + eeprom@50 { + compatible =3D "atmel,24c02"; + pagesize =3D <8>; + reg =3D <0x50>; + read-only; + size =3D <256>; + status =3D "okay"; + + nvmem-layout { + compatible =3D "onie,tlv-layout"; + + mac-address { + #nvmem-cell-cells =3D <1>; + }; + + num-macs { + }; + + product-name { + }; + + serial-number { + }; + }; + }; +}; + &i2c8 { pinctrl-names =3D "default"; pinctrl-0 =3D <&i2c8_cfg>; --=20 2.55.0 From nobody Fri Jul 24 22:17:36 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DC5C3439F62 for ; 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charset="utf-8" Enable i2c1 for k3-com260-ifx and use it for a 24c02 eeprom. This eeprom, unlike the one connected to i2c2, is part of the carrier board. Some boards do not have any data programmed on this eeprom from factory. Signed-off-by: Jennifer Berringer --- arch/riscv/boot/dts/spacemit/k3-com260-ifx.dts | 15 +++++++++++++++ arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi | 12 ++++++++++++ 2 files changed, 27 insertions(+) diff --git a/arch/riscv/boot/dts/spacemit/k3-com260-ifx.dts b/arch/riscv/bo= ot/dts/spacemit/k3-com260-ifx.dts index e7f76cd24b903..a5c08a7a781a9 100644 --- a/arch/riscv/boot/dts/spacemit/k3-com260-ifx.dts +++ b/arch/riscv/boot/dts/spacemit/k3-com260-ifx.dts @@ -20,6 +20,21 @@ chosen { }; }; =20 +&i2c1 { + pinctrl-names =3D "default"; + pinctrl-0 =3D <&i2c1_1_cfg>; + status =3D "okay"; + + eeprom@50 { + compatible =3D "atmel,24c02"; + pagesize =3D <8>; + reg =3D <0x50>; + read-only; + size =3D <256>; + status =3D "okay"; + }; +}; + &sdhci0 { pinctrl-names =3D "default","uhs"; pinctrl-0 =3D <&mmc1_cfg>; diff --git a/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi b/arch/riscv/boot= /dts/spacemit/k3-pinctrl.dtsi index 5b9045e014345..6482d24be1394 100644 --- a/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi +++ b/arch/riscv/boot/dts/spacemit/k3-pinctrl.dtsi @@ -78,6 +78,18 @@ gmac1-phy-0-pins { }; }; =20 + /omit-if-no-ref/ + i2c1_1_cfg: i2c1-1-cfg { + i2c1-1-pins { + pinmux =3D , /* i2c1 scl */ + ; /* i2c1 sda */ + + bias-pull-up =3D <1>; + drive-strength =3D <25>; + power-source =3D <1800>; + }; + }; + /omit-if-no-ref/ i2c2_1_cfg: i2c2-1-cfg { i2c2-1-pins { --=20 2.55.0