[U-Boot] [PATCH RFC] drivers/rtc: add Marvell Integrated RTC.

[Jason]

On Sun, Jul 24, 2011 at 03:56:57PM +0000, Clint Adams wrote:
> On Sun, Jul 24, 2011 at 01:12:01AM +0000, u-boot at lakedaemon.net wrote:
> > rewrite of the not-merged code from Globalscale Technologies.  This RTC is
> > known to exist in the DreamPlug platform and is accessed via two registers.
> 
> If I apply this on top of your v4 patch on top of 2011.06, I only need two
> tweaks to build: MACH_TYPE_DREAMPLUG which will obviously sort itself out,
> and s/MPP7_GP0/MPP7_GPO/ in board/Marvell/dreamplug/dreamplug.c .

Yes, what an embarrassing typo, that shouldn't even build. :-(  Well, it
was RFC...

> It has not yet been tested on a plug.  Do you have a working OpenOCD config
> for flash/ram?

Sort of.  The openocd config for the sheevaplug/guruplug is what I use,
and is distributed on the dreamplug download page [1].  It does _not_
have support for the SPI flash.  You can also use the sheevaplug.cfg
shipped with openocd.  So, I use openocd or tftp to transfer to RAM,
then use u-boot to write to flash.

To test images, or to reflash, I load the known-good u-boot into RAM via
openocd, then I'll either reflash it or load a new testing one from
there.

To write a u-boot.kwb test image to flash, here is what I do:

openocd$ sheevaplug_init
openocd$ load_image u-boot                 # known good from Marvell
openocd$ load_image u-boot.kwb 0x00800000  # monster I created
openocd$ resume 0x00600000                 # run the known good

then, in u-boot

u-boot$ sf probe 0
u-boot$ sf erase 0x0 0x100000
u-boot$ sf write 0x00800000 0x0 0x100000

If time allows, I'd like to add SPI flash support to OpenOCD.
Unfortunately, time is short and the above process works.

hth,

Jason.

[1]
http://code.google.com/p/dreamplug/downloads/detail?name=dream_burn_spi.tar.bz2&can=2&q=