-----Original Message----- From: Marek Vasut [mailto:marex@denx.de] Sent: 21 March 2012 16:27 To: Prafulla Wadaskar Cc: Luka Perkov; u-boot@lists.denx.de; dreagle@doukki.net; Wolfgang Denk Subject: Re: [U-Boot] [PATCH v2] add new board nas62x0
Dear Prafulla Wadaskar,
-----Original Message----- From: Marek Vasut [mailto:marex@denx.de] Sent: 21 March 2012 15:33 To: Prafulla Wadaskar Cc: Luka Perkov; u-boot@lists.denx.de; dreagle@doukki.net;
Wolfgang
Denk Subject: Re: [U-Boot] [PATCH v2] add new board nas62x0
Dear Prafulla Wadaskar,
...snip...
Hi Luka
#1: Defining these values as 0xffffffff, indicates that all
GPIOs
are
configured high by default. so this configuration solely depends
upon your
board requirement.
#2: on kirkwood, you should define CONFIG_SKIP_LOWLEVEL_INIT
since
lowlevel_init is not needed on Kirkwood platforms. (ref: doc/README.kwbimage)
Prafulla, you're then missing the fiddling with CPSR bits, which
might
be quite necessary.
Hi Marek. May be, may you please explain these bits? Or any pointers? Can't
these be
addressed in kwimage.cfg?
I have no idea, I'm no kirkwood expert. And about these bits, check start.S, what it does with them.
Hi Marek,
I have checked arc/arm/cpu/arm926ejs/start.S, and I didn't find any issue, lowlevel_init will be called from cpu_init_crit which should be okay, there is cache init related code in it, if that can be a problem then it should be kept out. And on Kirkwood, internal bootloader does the job of lowlevel_init prior to start uboot execution.
Regards.. Prafulla . . .