linux-kernel - [PATCH 1/2] ARM: dts: meson8b: add the nvmem cell with the board's MAC address

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Message-Id: <20190727194647.15355-2-martin.blumenstingl@googlemail.com>
Date:   Sat, 27 Jul 2019 21:46:46 +0200
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     linux-amlogic@...ts.infradead.org, khilman@...libre.com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux.amoon@...il.com, ottuzzi@...il.com,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Subject: [PATCH 1/2] ARM: dts: meson8b: add the nvmem cell with the board's MAC address

Amlogic's BSP kernel defines that all boards with a MAC address stored
in the eFuse have it at offset 0x1b4. It is up to the board to
decide whether to use this MAC address or not:
- Odroid-C1 uses the MAC address from the eFuse
- EC-100 seems to read the MAC address from eMMC

Add the nvmem cell which describes the Ethernet MAC address. Don't
assign it to the Ethernet controller, because depending on the board the
actual MAC address may be read from somewhere else.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
---
 arch/arm/boot/dts/meson8b.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
index 30fca9bb4bbe..c7de58b71d08 100644
--- a/arch/arm/boot/dts/meson8b.dtsi
+++ b/arch/arm/boot/dts/meson8b.dtsi
@@ -402,6 +402,10 @@
 	clocks = <&clkc CLKID_EFUSE>;
 	clock-names = "core";
 
+	ethernet_mac_address: mac@1b4 {
+		reg = <0x1b4 0x6>;
+	};
+
 	temperature_calib: calib@1f4 {
 		/* only the upper two bytes are relevant */
 		reg = <0x1f4 0x4>;
-- 
2.22.0