linux-kernel - [PATCH] arm64: dts: ls1012a: Add serial alias for ls1012a-rdb

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Date:   Thu,  9 Sep 2021 16:42:29 +0530
From:   Kuldeep Singh <kuldeep.singh@....com>
To:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Kuldeep Singh <kuldeep.singh@....com>
Subject: [PATCH] arm64: dts: ls1012a: Add serial alias for ls1012a-rdb

U-boot atempts to read serial alias value for ls1012a-rdb but couldn't
do so as it is not initialised and thus, FDT_ERR_NOTFOUND error is
reported while booting linux.

Loading fdt from FIT Image at a0000000 ...
   Description:  ls1012ardb-dtb
     Type:         Flat Device Tree
     Data Start:   0xab111474
     Data Size:    11285 Bytes = 11 KiB
     Architecture: AArch64
     Load Address: 0x90000000
   Loading fdt from 0xab111474 to 0x90000000
   Booting using the fdt blob at 0x90000000
   Uncompressing Kernel Image
   Loading Device Tree to 000000008fffa000, end 000000008ffffc14 ... OK
WARNING: fdt_fixup_stdout: could not read serial0 alias: FDT_ERR_NOTFOUND
NOTICE:  RNG: INSTANTIATED

Starting kernel ...

Fix the above error by specifying serial value to duart.

Signed-off-by: Kuldeep Singh <kuldeep.singh@....com>
---
 arch/arm64/boot/dts/freescale/fsl-ls1012a-rdb.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1012a-rdb.dts b/arch/arm64/boot/dts/freescale/fsl-ls1012a-rdb.dts
index 79f155dedb2d..e662677a6e28 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1012a-rdb.dts
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1012a-rdb.dts
@@ -15,6 +15,7 @@ / {
 	compatible = "fsl,ls1012a-rdb", "fsl,ls1012a";
 
 	aliases {
+		serial0 = &duart0;
 		mmc0 = &esdhc0;
 		mmc1 = &esdhc1;
 	};
-- 
2.25.1