Only UART clocks are included for now, but the code should cover
other peripherals needs, too.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

This removes the existing Tegra CAR driver and replaces it with code
ported from the Linux clock framework.

In the current state only the relevant PLLs are supported, but this is
no functional regression from the existing code.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

All Tegra20 boards have a common startup sequence. Also there is an
agreement on how to find out about the installed amount of RAM and other
information needed by early startup. So as there is really no need to do
any lowlevel stuff per board, we can just do it at the ARCH level.

This also enables the first stage loading of barebox by detecting the
currently running CPU and booting the main CPU cluster if neccesary.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Tested-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Only a basic set of clocks is supported. This is a temporary solution
and will go away as soon as the port of the Tegra common clock code from
the Linux kernel is ready to go.

Signed-off-by: Lucas Stach <dev@lynxeye.de>
Tested-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>