[flashrom] Bus Pirate pull-up resistors patch.

[Stefan Tauner]

On Tue, 1 Jan 2013 05:03:55 -0500
Brian Salcedo <bsalcedo at gmx.us> wrote:

> 
> When working with some flash chips using the Bus Pirate programmer, the
> use of the Bus Pirate's on-board pull-up resistors is sometimes
> necessary.
> 
> Use of said pull-up resistors requires the user to apply a voltage to
> the VPU pin of the Bus Pirate, and then command it to use them.
> 
> Included is a patch to initialize the Bus Pirate's pull-up resistors
> with a 'pullups=1' at the command line:
> 
> e.g. flashrom -p buspirate_spi:dev=/dev/buspirate,pullups=1
> 
> Here is a link to information pertaining to what this patch does.
> http://dangerousprototypes.com/docs/SPI_(binary)#0100wxyz_-_Configure_peripherals_w.3Dpower.2C_x.3Dpull-ups.2C_y.3DAUX.2C_z.3DCS
> 
> Currently, flashrom sends 0x4b, which does not set the "pull-ups" bit
> high. Optionally sending 0x4f instead will enable them.

There were quite some problems with the patch, but they have (hopefully)
been fixed by me and tested by Brian.
I have committed the result in r1641.
Thanks Brian for your contribution!

-- 
Kind regards/Mit freundlichen Grüßen, Stefan Tauner