[U-Boot] [PATCH v2 4/7] Serial: ns16550: Add support for CONFIG_SYS_NS16550_IER macro

[Wolfgang Denk <wd@denx.de>]

Dear Prafulla Wadaskar,

In message <1291114965-17100-5-git-send-email-prafulla@marvell.com> you wrote:
> On some processors this ier register configuration is different
> for ex. Marvell Armada100
> 
> This patch introduce CONFIG_SYS_NS16550_IER macro support to
> unconditionally initialize this register.

Sorry, but I don't like an implementation detail:

>  void NS16550_init (NS16550_t com_port, int baud_divisor)
>  {
> -	serial_out(0x00, &com_port->ier);
> +	serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
>  #if defined(CONFIG_OMAP) && !defined(CONFIG_OMAP3_ZOOM2)
>  	serial_out(0x7, &com_port->mdr1);	/* mode select reset TL16C750*/
>  #endif
> @@ -52,7 +52,7 @@ void NS16550_init (NS16550_t com_port, int baud_divisor)
>  #ifndef CONFIG_NS16550_MIN_FUNCTIONS
>  void NS16550_reinit (NS16550_t com_port, int baud_divisor)
>  {
> -	serial_out(0x00, &com_port->ier);
> +	serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
>  	serial_out(UART_LCR_BKSE | UART_LCRVAL, &com_port->lcr);
>  	serial_out(0, &com_port->dll);
>  	serial_out(0, &com_port->dlm);
> diff --git a/include/ns16550.h b/include/ns16550.h
> index 9ea81e9..e9cb449 100644
> --- a/include/ns16550.h
> +++ b/include/ns16550.h
> @@ -33,6 +33,10 @@
>  	unsigned char postpad_##x[-CONFIG_SYS_NS16550_REG_SIZE - 1];
>  #endif
>  
> +#ifndef CONFIG_SYS_NS16550_IER
> +#define CONFIG_SYS_NS16550_IER	0x00
> +#endif /* CONFIG_SYS_NS16550_IER */

As this macro is only used in drivers/serial/ns16550.c, it makes no
sense to me to move this to ns16550.h - this makes the code just
harder to read.  Please move this #ifndef... to
drivers/serial/ns16550.c

Also, please add a description of the new CONFIG_ variable to the
README file.

Thanks.

Best regards,

Wolfgang Denk

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