linux-kernel - Re: [PATCH] tty: serial: fsl_lpuart: select SERIAL_FSL_LPUART for SERIAL_FSL_LPUART

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Message-ID: <026ee207-3b90-c7ae-a7fd-66a34cd3ee90@redhat.com>
Date:   Sat, 25 Feb 2023 09:51:30 -0800
From:   Tom Rix <trix@...hat.com>
To:     Randy Dunlap <rdunlap@...radead.org>, gregkh@...uxfoundation.org,
        jirislaby@...nel.org
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tty: serial: fsl_lpuart: select SERIAL_FSL_LPUART for
 SERIAL_FSL_LPUART_CONSOLE


On 2/25/23 9:46 AM, Randy Dunlap wrote:
> Hi--
>
> On 2/25/23 09:39, Tom Rix wrote:
>> A rand config causes this link error
>> ld: drivers/tty/serial/earlycon.o: in function `parse_options':
>> drivers/tty/serial/earlycon.c:99: undefined reference to `uart_parse_earlycon'
>>
>> The rand config has
>> CONFIG_SERIAL_CORE=m
>> CONFIG_SERIAL_EARLYCON=y
>> CONFIG_SERIAL_FSL_LPUART=m
>> CONFIG_SERIAL_FSL_LPUART_CONSOLE=y
>>
>> SERIAL_FSL_LPUART should have been selected instead of depends on-ed.
>>
>> Signed-off-by: Tom Rix <trix@...hat.com>
>> ---
>>   drivers/tty/serial/Kconfig | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
>> index 625358f44419..b24d74d389fc 100644
>> --- a/drivers/tty/serial/Kconfig
>> +++ b/drivers/tty/serial/Kconfig
>> @@ -1313,7 +1313,7 @@ config SERIAL_FSL_LPUART
>>   
>>   config SERIAL_FSL_LPUART_CONSOLE
>>   	bool "Console on Freescale lpuart serial port"
>> -	depends on SERIAL_FSL_LPUART
>> +	select SERIAL_FSL_LPUART
> Most other _CONSOLE Kconfig have:
>
> 	depends on SERIAL_FSL_LPUART=y

commit 5779a072c248db7a40cfd0f5ea958097fd1d9a30 removed the =y. so it 
could be built as a module.

Tom

>
> e.g.
>
> but I noticed a few others with a similar problem.
>
>>   	select SERIAL_CORE_CONSOLE
>>   	select SERIAL_EARLYCON
>>   	help