linux-kernel - Re: [PATCH] scripts/dtc: Update to upstream version v1.6.0-51-g183df9e9c2b9

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Message-ID: <06560f35-af85-5a75-80f5-9b2d44feec39@roeck-us.net>
Date:   Mon, 15 Feb 2021 08:15:06 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Michal Simek <michal.simek@...inx.com>,
        Rob Herring <robh@...nel.org>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Frank Rowand <frowand.list@...il.com>,
        devicetree@...r.kernel.org
Subject: Re: [PATCH] scripts/dtc: Update to upstream version
 v1.6.0-51-g183df9e9c2b9

On 2/15/21 7:23 AM, Michal Simek wrote:
[ ... ]

> 
>> I think the problem is here:
>>
>> /* initialize device tree for usage in early_printk */
>>         early_init_devtree(_fdt_start);
>>
>> That probably also explains why enabling earlycon doesn't help.
> 
> Can you please elaborate more on it?
> I see earlycon to be enabled quite early.
> 
> [    0.000000] Ramdisk addr 0x00000000,
> [    0.000000] Compiled-in FDT at (ptrval)

Unless I was missing something, this is where it failed.

> [    0.000000] earlycon: ns16550a0 at MMIO 0x44a01000 (options '115200n8')
> [    0.000000] printk: bootconsole [ns16550a0] enabled
> [    0.000000] cma: Reserved 16 MiB at 0xaec00000
> 
[ ... ]

> 
> Please send the patch. Would be the best as early as possible and I will
> queue it for 5.12.
> 
https://lore.kernel.org/patchwork/patch/1380316/

Guenter