Re: [U-Boot] [PATCH] arm, omap3: fix warm reset serial output on OMAP36xx/AM/DM37xx

On Mon, May 07, 2012 at 10:49:21PM -0400, Matt Porter wrote:

In warm reset conditions on OMAP36xx/AM/DM37xx the rom code incorrectly sets the DPLL4 clock input divider to /6.5 which is an invalid value unless the input clock is 13MHz. When a JTAG emulator is attached, a warm reset is necessary after the emulator gains control of the process. This results in a loss of serial output due to the invalid DPLL4 settings.

This patch fixes the issue by resetting the DPLL4 clock input divider to /1 when the input clock is not 13MHz. AM/DM37x TRM section 3.5.3.3.3.2.1 specifies that the /6.5 setting is only used when the input clock is 13MHz.

Signed-off-by: Matt Porter mporter@ti.com

Applied to u-boot-ti/master, thanks.