openwrt/package/boot/uboot-mediatek/patches/001-mtk-0100-arm-dts-mt7622-remove-default-pinctrl-of-uart0.patch

From a3ba6adb70c91ec3b9312c3a025faa44acd39cfa Mon Sep 17 00:00:00 2001
From: Weijie Gao <weijie.gao@mediatek.com>
Date: Wed, 13 Jul 2022 11:16:39 +0800
Subject: [PATCH] arm: dts: mt7622: remove default pinctrl of uart0

Currently u-boot running on mt7622 will print an warning log at beginning:
> serial_mtk serial@11002000: pinctrl_select_state_full: uclass_get_device_by_phandle_id: err=-19

It turns out that the pinctrl uclass can't work properly in board_f stage.

Since the uart0 is the default UART device used by bootrom, and will be
initialized in both bootrom and tf-a bl2. It's ok not to setup pinctrl for
uart0 in u-boot.

This patch removes the default pinctrl of uart0 to suppress the unwanted
warning.

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
---
 arch/arm/dts/mt7622-bananapi-bpi-r64.dts | 2 --
 arch/arm/dts/mt7622-rfb.dts              | 2 --
 2 files changed, 4 deletions(-)

--- a/arch/arm/dts/mt7622-bananapi-bpi-r64.dts
+++ b/arch/arm/dts/mt7622-bananapi-bpi-r64.dts
@@ -182,8 +182,6 @@
 };
 
 &uart0 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&uart0_pins>;
 	status = "okay";
 };
 
--- a/arch/arm/dts/mt7622-rfb.dts
+++ b/arch/arm/dts/mt7622-rfb.dts
@@ -189,8 +189,6 @@
 };
 
 &uart0 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&uart0_pins>;
 	status = "okay";
 };