[ts-7000] Re: Inverted polarity RTS/DTR on TS7260 kernel 2.6

["r_bergo" <>]

Thank you Todd

You got it!

I applied the patch and now it works fine.
Thank you very much

Roberto


--- In  "ToddV" <> wrote:
>
> 
> 
> Hi Roberto -
> 
> > For other questions, now I need to upgrade kernel to 2.6 and I got this 
> > unaspected problem:
> > - on /dev/ttyAM0 closed RTS and DTR are at logic level 1 (active)
> > - on /dev/ttyAM0 open RTS and DTR are at logic level 0 (not active)
> > 
> > It seems works in inverted mode. Calling fopen() they go down and calling 
> > fclose() they works!!!
> 
> 
> Yes, the polarity of the RTS/CTS lines are incorrect as implemented in the 
> kernel code for the ep93xx. These are set in the ep93xx_uart_set_mctrl() 
> function in arch/arm/mach-ep93xx/core.c
> 
> Here is the patch that I apply when building my kernels:
> 
> diff --git a/arch/arm/mach-ep93xx/core.c b/arch/arm/mach-ep93xx/core.c
> index ffdf87b..5718cca 100644
> --- a/arch/arm/mach-ep93xx/core.c
> +++ b/arch/arm/mach-ep93xx/core.c
> @@ -251,9 +251,9 @@ static void ep93xx_uart_set_mctrl(struct amba_device *dev,
>         unsigned int mcr;
>  
>         mcr = 0;
> -       if (!(mctrl & TIOCM_RTS))
> +       if (mctrl & TIOCM_RTS)
>                 mcr |= 2;
> -       if (!(mctrl & TIOCM_DTR))
> +       if (mctrl & TIOCM_DTR)
>                 mcr |= 1;
>  
>         __raw_writel(mcr, base + EP93XX_UART_MCR_OFFSET);
> -- 
> 
> 
> Todd
>




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