From 62d5ece70bf6cbbdd1add3a16475a1cea1cb260d Mon Sep 17 00:00:00 2001
From: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Date: Sun, 22 Dec 2019 16:51:19 +0100
Subject: [PATCH] ramips: remove bogus ralink,mtd-eeprom with offset 0x4

Several devices in mt76x8 subtarget use the following line to set
up wmac in their DTS(I) files:

ralink,mtd-eeprom = <&factory 0x4>

This is strange for several reasons:
- They should use mediatek,mtd-eeprom on this SOC
- The caldata is supposed to start at 0x0
- The parent DTSI mt7628an.dtsi specifies mediatek,mtd-eeprom anyway,
  starting from 0x0
- The offset coincides with the default location of the MAC address
  in caldata

Based on the comment in b28e94d4bfa1 ("ramips: MiWiFi Nano fixes"),
it looks like the author for this device wanted to actually use
mtd-mac-address instead of ralink,mtd-eeprom. A check on the same
device revealed that actually the MAC address start at offset 4 there,
so the correct caldata offset is 0x0.

Based on these findings, and the fact that the expected location on
this SOC is 0x0, we remove the "ralink,mtd-eeprom = <&factory 0x4>"
statement from all devices in ramips (being only mt7628an anyway).

Thanks to Sungbo Eo for finding and researching this.

Reported-by: Sungbo Eo <mans0n@gorani.run>
Fixes: b28e94d4bfa1 ("ramips: MiWiFi Nano fixes")
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
(cherry picked from commit 09d38a3bc328d122b0d84fcf6bb53d2bce7373b6)
---
 target/linux/ramips/dts/MIWIFI-NANO.dts     | 1 -
 target/linux/ramips/dts/RAK633.dts          | 1 -
 target/linux/ramips/dts/TOTOLINK-LR1200.dts | 1 -
 target/linux/ramips/dts/VOCORE2.dtsi        | 1 -
 target/linux/ramips/dts/WR1000.dts          | 1 -
 target/linux/ramips/dts/ZBT-WE1226.dts      | 1 -
 6 files changed, 6 deletions(-)

diff --git a/target/linux/ramips/dts/MIWIFI-NANO.dts b/target/linux/ramips/dts/MIWIFI-NANO.dts
index bad37e21f1..210c00cfb9 100644
--- a/target/linux/ramips/dts/MIWIFI-NANO.dts
+++ b/target/linux/ramips/dts/MIWIFI-NANO.dts
@@ -65,7 +65,6 @@
 
 &wmac {
 	status = "okay";
-	ralink,mtd-eeprom = <&factory 0x4>;
 };
 
 &ethernet {
diff --git a/target/linux/ramips/dts/RAK633.dts b/target/linux/ramips/dts/RAK633.dts
index ac7218510f..8fc5498244 100644
--- a/target/linux/ramips/dts/RAK633.dts
+++ b/target/linux/ramips/dts/RAK633.dts
@@ -100,5 +100,4 @@
 
 &wmac {
 	status = "okay";
-	ralink,mtd-eeprom = <&factory 0x4>;
 };
diff --git a/target/linux/ramips/dts/TOTOLINK-LR1200.dts b/target/linux/ramips/dts/TOTOLINK-LR1200.dts
index 81aa8db915..70bbfd2272 100644
--- a/target/linux/ramips/dts/TOTOLINK-LR1200.dts
+++ b/target/linux/ramips/dts/TOTOLINK-LR1200.dts
@@ -108,7 +108,6 @@
 
 &wmac {
 	status = "okay";
-	ralink,mtd-eeprom = <&factory 0x4>;
 };
 
 &ethernet {
diff --git a/target/linux/ramips/dts/VOCORE2.dtsi b/target/linux/ramips/dts/VOCORE2.dtsi
index f7aec8e1f5..4e32ed5a35 100644
--- a/target/linux/ramips/dts/VOCORE2.dtsi
+++ b/target/linux/ramips/dts/VOCORE2.dtsi
@@ -20,7 +20,6 @@
 
 &wmac {
 	status = "okay";
-	ralink,mtd-eeprom = <&factory 0x4>;
 };
 
 &ethernet {
diff --git a/target/linux/ramips/dts/WR1000.dts b/target/linux/ramips/dts/WR1000.dts
index ff0b9badd1..a582172aca 100644
--- a/target/linux/ramips/dts/WR1000.dts
+++ b/target/linux/ramips/dts/WR1000.dts
@@ -135,7 +135,6 @@
 
 &wmac {
 	status = "okay";
-	ralink,mtd-eeprom = <&factory 0x4>;
 };
 
 &ethernet {
diff --git a/target/linux/ramips/dts/ZBT-WE1226.dts b/target/linux/ramips/dts/ZBT-WE1226.dts
index aace0042e4..e5873def0a 100644
--- a/target/linux/ramips/dts/ZBT-WE1226.dts
+++ b/target/linux/ramips/dts/ZBT-WE1226.dts
@@ -111,7 +111,6 @@
 
 &wmac {
 	status = "okay";
-	ralink,mtd-eeprom = <&factory 0x4>;
 };
 
 &ethernet {