linux-kernel - Re: [PATCH 16/18] Atmel: move console default platform

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Date:	Sat, 18 Feb 2012 10:17:49 +0100
From:	Hans-Christian Egtvedt <egtvedt@...fundet.no>
To:	Nicolas Ferre <nicolas.ferre@...el.com>
Cc:	plagnioj@...osoft.com, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, kernel@...32linux.org
Subject: Re: [PATCH 16/18] Atmel: move console default platform_device to
 serial driver

Around Fri 17 Feb 2012 18:50:08 +0100 or thereabout, Nicolas Ferre wrote:
> From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
> 
> This variable spread on every SoC that is using the atmel_serial.c
> driver can be included directly into the latter.
> 
> This will allow to compile multiple soc in the same kernel.

Sounds like a good idea, but...

<snipp AT91 changes>

> diff --git a/arch/avr32/mach-at32ap/at32ap700x.c b/arch/avr32/mach-at32ap/at32ap700x.c
> index 402a7bb..889c544 100644
> --- a/arch/avr32/mach-at32ap/at32ap700x.c
> +++ b/arch/avr32/mach-at32ap/at32ap700x.c
> @@ -1055,8 +1055,6 @@ struct platform_device *__init at32_add_device_usart(unsigned int id)
>  	return at32_usarts[id];
>  }
>  
> -struct platform_device *atmel_default_console_device;
> -
>  void __init at32_setup_serial_console(unsigned int usart_id)
>  {
>  	atmel_default_console_device = at32_usarts[usart_id];

I doubt this assignment will work if you remove the struct above. I did not
look at how AT91 does this, will it be similar affected?

> diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
> index 10605ec..f9a6be7 100644
> --- a/drivers/tty/serial/atmel_serial.c
> +++ b/drivers/tty/serial/atmel_serial.c
> @@ -1526,6 +1526,8 @@ void __init atmel_register_uart_fns(struct atmel_port_fns *fns)
>  	atmel_pops.set_wake	= fns->set_wake;
>  }
>  
> +struct platform_device *atmel_default_console_device;	/* the serial console device */
> +
>  #ifdef CONFIG_SERIAL_ATMEL_CONSOLE
>  static void atmel_console_putchar(struct uart_port *port, int ch)
>  {
-- 
mvh
Hans-Christian Egtvedt
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