[U-Boot] [PATCH 09/10] arm: am437x: cm-t43: set MPU and CORE voltages on boot

Tom Rini trini at konsulko.com
Sat Feb 20 01:56:11 CET 2016


On Fri, Feb 19, 2016 at 07:19:49PM +0200, Nikita Kiryanov wrote:

> During boot, U-Boot raises the CPU frequency but the CORE and MPU regulators
> are not updated. This is not a problem in cold boot since the default values
> that the pmic outputs are correct, but if Linux were to switch the module to a
> low power OPP, the new voltage values will be retained after a reboot and the
> module will likely hang once U-Boot raises the CPU frequency back up.
> 
> Set both CORE and MPU regulators to to 1.1V on boot.
> 
> Cc: Tom Rini <trini at konsulko.com>
> Cc: Albert Aribaud <albert.u.boot at aribaud.net>
> Cc: Igor Grinberg <grinberg at compulab.co.il>
> Signed-off-by: Nikita Kiryanov <nikita at compulab.co.il>

Reviewed-by: Tom Rini <trini at konsulko.com>

-- 
Tom
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