Re: [RFC 2.6.26-rc3 06/10] gumstix: conversion to MFP support and add bluetooth support

["Jaya Kumar" <jayakumar.lkml@gmail.com>]

On Thu, Jun 12, 2008 at 10:01 PM, Eric Miao <eric.y.miao@gmail.com> wrote:
> Jaya Kumar wrote:
>> diff --git a/include/asm-arm/arch-pxa/mfp-pxa25x.h b/include/asm-arm/arch-pxa/mfp-pxa25x.h
>> index 0499323..6c82a74 100644
>> --- a/include/asm-arm/arch-pxa/mfp-pxa25x.h
>> +++ b/include/asm-arm/arch-pxa/mfp-pxa25x.h
>> @@ -79,6 +79,7 @@
>>  #define GPIO43_HWUART_TXD    MFP_CFG_OUT(GPIO43, AF3, DRIVE_HIGH)
>>  #define GPIO44_HWUART_CTS    MFP_CFG_IN(GPIO44, AF3)
>>  #define GPIO45_HWUART_RTS    MFP_CFG_OUT(GPIO45, AF3, DRIVE_HIGH)
>> +#define GPIO45_HWUART_RTSL   MFP_CFG_OUT(GPIO45, AF3, DRIVE_LOW)
>
> Is this board specific or globally applicable? ISTR, RTS is low active,

I suspect it is board specific, ie: gumstix-[basix/connex]-bt
specific. I wasn't able to find schematics for this board but found
what is probably the same part of the design.

http://www.gumstix.org/schematics/B00002-HWUART.png?nocache=1

> so a HIGH in low power mode would be more appropriate that the remote
> DCE will hold its data to send.

I agree that RTS should start high. I'm not sure why the bt device
seems troubled in that state. I'll debug some more.

Thanks,
jaya

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