Hi Andreas, On Thu, Aug 16, 2012 at 05:33:26PM +0200, Andreas Bießmann wrote: > On 16.08.2012 17:07, Markus Hubig wrote:
<snip> > > But it definitly dosn't work here. I checked with an oscilator, if I toggle > > the pin in board_init() I can nicely see it going high and low but if I > > toggle it in board_early_init_f() *nothing* happens! > > Well as mentioned in my mail the mdelay() can not work in > board_eraly_init_f() cause the timers are not setup at this stage. You > need to provide some nop-loop based delay here to have proper delay! > As mentioned before my at91sam9263 (running at about 200 MHz produce 38 > us out of a mdelay(10); I dunno what your g20 variant with about 400 MHz > produces here). A simple test could be to move the timer init in > a/a/lib/board.c before board_early_init_f in the init_sequence. Then the > mdelay() will work as expected! You were right! The problem was the missing delay after setting the pin! Just moving the timer_init() before board_early_init_f() in the init_sequence didn't work because we need the clocks from board_early_init_f() first. But I found the | board_postclk_init() function and the corresponding | CONFIG_BOARD_POSTCLK_INIT switch, so I put everything there and now it all works fine! ;-) > send a patch (including working serial console output ;) Unfortunately the board_postclk_init() function was not in the init_sequence at arch/arm/lib/board.c so I added it there. I will provide two patches, one for the board stuff and one for the stamp stuff, if this is OK with you ... Cheers, Markus -- Human beings were created by water to transport it uphill. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
