[U-Boot] [PATCH v6 4/7] jz4740 nand driver

[Scott Wood]

On Tue, 22 Mar 2011 16:11:03 +0800
Xiangfu Liu <xiangfu at openmobilefree.net> wrote:

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> On 03/08/2011 07:44 AM, Scott Wood wrote:
> >> +#if defined(CONFIG_QI_LB60)
> >> > +#define KEY_U_OUT       (32 * 2 + 16)
> >> > +#define KEY_U_IN        (32 * 3 + 19)
> >> > +	__gpio_as_input(KEY_U_IN);
> >> > +	__gpio_enable_pull(KEY_U_IN);
> >> > +	__gpio_as_output(KEY_U_OUT);
> >> > +	__gpio_clear_pin(KEY_U_OUT);
> >> > +
> >> > +	if (__gpio_get_pin(KEY_U_IN) == 0)
> >> > +		usb_boot();
> >> > +#endif
> >> > +#endif
> > This stuff does not belong in the NAND driver; it belongs under your board
> > or cpu directory.
> > 
> 
> I have tried to move those 'usb_boot' to board files. the only problem is 
> I have to run this 'usb_boot' very early. after CPU load the real u-boot to memory
> the usb_boot will not working. I will try to found more info about this. 
> then explain more in next email.

OK, so you need to run it during the SPL phase -- but there should be
some board/cpu-specific file for the SPL (if not, create one).

Current examples of this
include nand_spl/board/freescale/p1_p2_rdb/nand_boot.c and
arch/powerpc/cpu/mpc83xx/nand_init.c.

-Scott