linux-kernel - Re: [PATCH 2/3] earlycon: Print a notice when uartclk is unknown

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Message-ID: <2024091340-tacky-everybody-b582@gregkh>
Date: Fri, 13 Sep 2024 07:57:48 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: Raul E Rangel <rrangel@...omium.org>
Cc: linux-serial@...r.kernel.org, pmladek@...e.com,
	rafael.j.wysocki@...el.com, ribalda@...omium.org,
	Jiri Slaby <jirislaby@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] earlycon: Print a notice when uartclk is unknown

On Thu, Sep 12, 2024 at 11:36:20AM -0600, Raul E Rangel wrote:
> When trying to construct an earlycon=uart parameter it's hard to debug
> why it's not working.  In my specific case it was because the default
> uartclk earlycon assumes doesn't match my hardware. This change adds a
> notice so that the user is made aware of that this assumption is being
> made. This should hopefully lead to them adding a <uartclk> option to
> their earlycon parameter.
> 
> Booting with `console=uart,mmio32,0xfedc9000,115200n8`:
> [    0.000000] earlycon: uart: Unknown uartclk, assuming 1843200hz
> [    0.000000] earlycon: uart0 at MMIO32 0x00000000fedc9000 (options '115200n8')
> 
> Signed-off-by: Raul E Rangel <rrangel@...omium.org>

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>