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[2001:470:c:1200::2]) by smtp.googlemail.com with ESMTPSA id i2-20020a05620a248200b006bba46e5eeasm4569299qkn.37.2022.09.10.21.06.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Sep 2022 21:06:34 -0700 (PDT) From: Tianling Shen To: Rob Herring , Krzysztof Kozlowski , Heiko Stuebner , Tianling Shen Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v4] arm64: dts: rockchip: add EEPROM node for NanoPi R4S Date: Sun, 11 Sep 2022 12:06:28 +0800 Message-Id: <20220911040628.13774-1-cnsztl@gmail.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220910_210640_665084_3DFE671D X-CRM114-Status: GOOD ( 12.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org NanoPi R4S has a EEPROM attached to the 2nd I2C bus (U92), which stores the MAC address. FriendlyElec ship two versions of the R4S [1]: The standard as well as the enterprise edition with only the enterprise edition including the EEPROM chip that stores the unique MAC address. 1. https://wiki.friendlyelec.com/wiki/index.php/NanoPi_R4S#Differences_Between_R4S_Standard_Version_.26_R4S_Enterprise_Version Changes in v4: - Removed `mac-address` cell as it breaks the standard edition Changes in v3: - Added address-cells and size-cells Changes in v2: - Added the size of EEPROM - Added `mac-address` cell to pass the MAC address to kernel - Removed `read-only` property in EEPROM node Signed-off-by: Tianling Shen --- arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts index fe5b52610010..42c99573ab27 100644 --- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts +++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-r4s.dts @@ -68,6 +68,17 @@ &emmc_phy { status = "disabled"; }; +&i2c2 { + eeprom@51 { + compatible = "microchip,24c02", "atmel,24c02"; + reg = <0x51>; + pagesize = <16>; + size = <256>; + #address-cells = <1>; + #size-cells = <1>; + }; +}; + &i2c4 { status = "disabled"; };