The squashfs+jffs2 root filesystem only came up as read-only and the config would not take: [ 25.600237] mount_root: Could not open mtd device: /dev/mtd4 [ 25.634674] mount_root: reading rootfs_data failed [ 25.665346] mount_root: Could not open mtd device: /dev/mtd3 [ 25.699802] mount_root: reading rootfs failed [ 25.726426] mount_root: mounting /dev/root Well that is not very strange since the whole firmware partition is made read-only in the device tree. Let's fix that by augmenting the OpenWrt patch. Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
		
			
				
	
	
		
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			38 lines
		
	
	
		
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From ea99e7570882df53478f9b5fa5886a6e92fc2c7f Mon Sep 17 00:00:00 2001
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From: Linus Walleij <linus.walleij@linaro.org>
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Date: Mon, 11 Mar 2019 15:44:29 +0100
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Subject: [PATCH] ARM: dts: Augment DIR-685 partition table for OpenWrt
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Rename the firmware partition so that the firmware MTD
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splitter will do its job, drop the rootfs arguments as
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the MTD splitter will set this up automatically.
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Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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---
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 arch/arm/boot/dts/gemini-dlink-dir-685.dts | 6 +++---
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 1 file changed, 3 insertions(+), 3 deletions(-)
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--- a/arch/arm/boot/dts/gemini-dlink-dir-685.dts
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+++ b/arch/arm/boot/dts/gemini-dlink-dir-685.dts
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@@ -20,7 +20,7 @@
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 	};
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 	chosen {
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-		bootargs = "console=ttyS0,19200n8 root=/dev/sda1 rw rootwait consoleblank=300";
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+		bootargs = "console=ttyS0,19200n8 consoleblank=300";
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 		stdout-path = "uart0:19200n8";
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 	};
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@@ -286,9 +286,9 @@
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 				 * this is called "upgrade" on the vendor system.
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 				 */
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 				partition@40000 {
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-					label = "upgrade";
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+					compatible = "wrg";
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+					label = "firmware";
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 					reg = <0x00040000 0x01f40000>;
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-					read-only;
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 				};
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 				/* RGDB, Residental Gateway Database? */
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 				partition@1f80000 {
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