[U-Boot] omap3 usb boot
Michael Trimarchi
michael at amarulasolutions.com
Fri Oct 11 11:15:25 CEST 2013
Hi Tom
I have managed to boot dm3730 on usb (first stage), but looking at the code
I have some comment
in arch/arm/cpu/armv7/omap3/clock.c
#ifdef CONFIG_SYS_NS16550
/* Enable UART1 clocks */
sr32(&prcm_base->fclken1_core, 13, 1, 0x1);
sr32(&prcm_base->iclken1_core, 13, 1, 0x1);
/* UART 3 Clocks */
sr32(&prcm_base->fclken_per, 11, 1, 0x1);
sr32(&prcm_base->iclken_per, 11, 1, 0x1);
You enable clock for two uarts without take in account the real console uart
of the device. Then some lines after
sr32(&prcm_base->fclken_per, 0, 32, FCK_PER_ON);
sr32(&prcm_base->iclken_per, 0, 32, ICK_PER_ON);
That just reset all the clock using the PER_ON mask so what is done before
doesn't make sense anymore.
Michael
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