[openwrt/openwrt] ipq40xx: fix MAC address on Meraki MR33 and MR74 after nvmem-layout

[LEDE Commits]

robimarko pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/06791742a0f269014d1724bedac73ed9935e3260

commit 06791742a0f269014d1724bedac73ed9935e3260
Author: Lech Perczak <lech.perczak at gmail.com>
AuthorDate: Mon Oct 7 00:08:23 2024 +0200

    ipq40xx: fix MAC address on Meraki MR33 and MR74 after nvmem-layout
    
    ...conversion.
    Commit 20736013e910 ("kernel: backport nvmem v6.6 fixes and v6.7 changes")
    has causedt he device to no longer correctly read MAC address from its
    onboard 24c64 EEPROM, because "at24" driver doesn't support legacy
    nvmem-cell bindings [1] - and there was an explicit config option added
    to mandate that behaviour in the following patch:
    
    820-v6.7-0002-nvmem-add-explicit-config-option-to-read-old-syntax-.patch
    
    But some of the devices, MR33 and MR74 included, weren't converted with
    that as well.
    Convert the definition to use proper fixed-layout binding to fix it.
    
    The offending change was introduced between v23.05.0 and v23.05.1, and
    found by bisection:
    git bisect start
    # status: waiting for both good and bad commits
    # good: [bd4f415efacfc03bbe5b79ae1d39c1451f5f7385] OpenWrt v23.05.0: adjust config defaults
    git bisect good bd4f415efacfc03bbe5b79ae1d39c1451f5f7385
    # status: waiting for bad commit, 1 good commit known
    # bad: [a58a86693f8593974ff7c26bb42e280b62a8724c] OpenWrt v23.05.1: adjust config defaults
    git bisect bad a58a86693f8593974ff7c26bb42e280b62a8724c
    # good: [3d0a78add22754aa891529b6702b5e4c7b837446] qualcommax: only build initramfs if CONFIG_TARGET_ROOTFS_INITRAMFS is set
    git bisect good 3d0a78add22754aa891529b6702b5e4c7b837446
    # bad: [21e5db97c410f4008c8fe8515fb79a7cde368dbf] build: add CycloneDX SBOM JSON support
    git bisect bad 21e5db97c410f4008c8fe8515fb79a7cde368dbf
    # good: [89184b15cfce4aaffac8cda87c2fa74f829ace42] mediatek: add build for MT7981 RFB
    git bisect good 89184b15cfce4aaffac8cda87c2fa74f829ace42
    # bad: [41f27bbb6d0af2f37098b97cd28d5f514a6fc417] bcm53xx: add the latest fix version of brcm_nvram
    git bisect bad 41f27bbb6d0af2f37098b97cd28d5f514a6fc417
    # good: [b649b0bf7100bdc6adb7e857c74738cab7c47b4c] kernel: nvmem: fix "fixed-layout" & support "mac-base"
    git bisect good b649b0bf7100bdc6adb7e857c74738cab7c47b4c
    # bad: [20736013e91030005353b401bc4b757ba5e5fa98] kernel: backport nvmem v6.6 fixes and v6.7 changes
    git bisect bad 20736013e91030005353b401bc4b757ba5e5fa98
    # good: [066971615ff66512bc542b09a90be34c2afe98bb] kernel: backport v6.6 nvmem changes
    git bisect good 066971615ff66512bc542b09a90be34c2afe98bb
    # first bad commit: [20736013e91030005353b401bc4b757ba5e5fa98] kernel: backport nvmem v6.6 fixes and v6.7 changes
    
    Link: [1] https://github.com/openwrt/openwrt/issues/15393#issuecomment-2212300849
    Fixes: 20736013e910 ("kernel: backport nvmem v6.6 fixes and v6.7 changes")
    Fixes: https://github.com/openwrt/openwrt/issues/15393
    Signed-off-by: Lech Perczak <lech.perczak at gmail.com>
    Link: https://github.com/openwrt/openwrt/pull/16623
    Signed-off-by: Robert Marko <robimarko at gmail.com>
---
 .../arm/boot/dts/qcom/qcom-ipq4029-insect-common.dtsi    | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/target/linux/ipq40xx/files-6.6/arch/arm/boot/dts/qcom/qcom-ipq4029-insect-common.dtsi b/target/linux/ipq40xx/files-6.6/arch/arm/boot/dts/qcom/qcom-ipq4029-insect-common.dtsi
index 3637b96d24..8286e1899f 100644
--- a/target/linux/ipq40xx/files-6.6/arch/arm/boot/dts/qcom/qcom-ipq4029-insect-common.dtsi
+++ b/target/linux/ipq40xx/files-6.6/arch/arm/boot/dts/qcom/qcom-ipq4029-insect-common.dtsi
@@ -128,13 +128,17 @@
 		pagesize = <32>;
 		reg = <0x50>;
 		read-only; /* This holds our MAC & Meraki board-data */
-		#address-cells = <1>;
-		#size-cells = <1>;
 
-		mac_address: mac-address at 66 {
-			compatible = "mac-base";
-			reg = <0x66 0x6>;
-			#nvmem-cell-cells = <1>;
+		nvmem-layout {
+			compatible = "fixed-layout";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			mac_address: mac-address at 66 {
+				compatible = "mac-base";
+				reg = <0x66 0x6>;
+				#nvmem-cell-cells = <1>;
+			};
 		};
 	};
 };