linux-kernel - [PATCH 2/2] imx6qdl.dtsi: use MAC-address from nvmem

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Message-Id: <20221128084749.5F10D1D73@mail.steuer-voss.de>
Date:   Wed, 2 Nov 2022 15:27:19 +0100
From:   Nikolaus Voss <nikolaus.voss@...g-streit.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, nv@...n.de
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH 2/2] imx6qdl.dtsi: use MAC-address from nvmem

IMX6QDL has fuse locations specified for storing the MAC for the
built-in ethernet (Table 5-8 in Reference Manual).
Define the fuse location in ocotp and refer to them in fec-ethernet.

If the cells are not flashed, the driver behavior is unchanged, i.e.
other MAC sources will be probed and a random MAC will be used as a
last resort.

Signed-off-by: Nikolaus Voss <nikolaus.voss@...g-streit.com>
---
 arch/arm/boot/dts/imx6qdl.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/imx6qdl.dtsi b/arch/arm/boot/dts/imx6qdl.dtsi
index 4f7fefc14d0ac..7449d554ef1aa 100644
--- a/arch/arm/boot/dts/imx6qdl.dtsi
+++ b/arch/arm/boot/dts/imx6qdl.dtsi
@@ -1053,6 +1053,8 @@ fec: ethernet@...8000 {
 					 <&clks IMX6QDL_CLK_ENET_REF>;
 				clock-names = "ipg", "ahb", "ptp", "enet_out";
 				fsl,stop-mode = <&gpr 0x34 27>;
+				nvmem-cells = <&fec_mac_addr>;
+				nvmem-cell-names = "mac-address";
 				status = "disabled";
 			};
 
@@ -1186,6 +1188,10 @@ tempmon_calib: calib@38 {
 				tempmon_temp_grade: temp-grade@20 {
 					reg = <0x20 4>;
 				};
+
+				fec_mac_addr: mac-addr@88 {
+					reg = <0x88 6>;
+				};
 			};
 
 			tzasc@...0000 { /* TZASC1 */
-- 
2.34.1