[U-Boot] PPC440EP UART 4port enble

[조기성 <k9@tibetsystem.com>]

Stefan,
Thank you for the feedback 

I have another question. 
UART 0,1,2,3 works fine.
UART3 TX works good, but UART RX is not working. 

TX data is success, but RX is not working . 
maybe you can point me to the right direction.

I use pcs440ep.h 's CONFIG_SYS_4xx_GPIO_TABLE , 

Best Regards. 
Steven. 

/* GPIO Core 1 */ \ 
{GPIO1_BASE, GPIO_IN, GPIO_SEL, GPIO_OUT_NO_CHG}, /* GPIO32 USB2D_OPMODE0 */ \ 
{GPIO1_BASE, GPIO_IN, GPIO_SEL, GPIO_OUT_NO_CHG}, /* GPIO33 USB2D_OPMODE1 */ \ 
{GPIO1_BASE, GPIO_OUT, GPIO_ALT3, GPIO_OUT_NO_CHG}, /* GPIO34 UART0_DCD_N UART1_DSR_CTS_N UART2_SOUT*/ \ 
{GPIO1_BASE, GPIO_IN, GPIO_ALT3, GPIO_OUT_NO_CHG}, /* GPIO35 UART0_8PIN_DSR_N UART1_RTS_DTR_N UART2_SIN*/ \ 
{GPIO1_BASE, GPIO_IN, GPIO_ALT3, GPIO_OUT_NO_CHG}, /* GPIO36 UART0_8PIN_CTS_N UART3_SIN*/ \ 
{GPIO1_BASE, GPIO_OUT, GPIO_ALT3, GPIO_OUT_NO_CHG}, /* GPIO37 UART0_RTS_N */ \ 
{GPIO1_BASE, GPIO_OUT, GPIO_ALT2, GPIO_OUT_NO_CHG}, /* GPIO38 UART0_DTR_N UART1_SOUT */ \ 
{GPIO1_BASE, GPIO_IN, GPIO_ALT2, GPIO_OUT_NO_CHG}, /* GPIO39 UART0_RI_N UART1_SIN */ \

-----Original Message-----
From: Stefan Roese [mailto:sr at denx.de] 
Sent: Tuesday, November 11, 2008 4:24 PM
To: u-boot at lists.denx.de; k9 at tibetsystem.com
Subject: Re: [U-Boot] PPC440EP UART 4port enble

On Tuesday 11 November 2008, ??? wrote:
> We have designed a new PPC440EP yosemite based board.
> But we are using UART 4port tx,rx( 2pin UART0, 1, 2, 3)
> But current It only works 2port(UART0, UART1).
> I read user manual then changed  u-boot's GPIO bit flag blows.
> But it's now working, How can I do that?

I suggest that you switch in your board port to the GPIO multiplexing 
initialization via the CONFIG_SYS_4xx_GPIO_TABLE definition. As an example 
for 440EP take a look at the pcs440ep board port. It's easier and less error 
prone to change the pin configuration in this table.

Best regards,
Stefan

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