tree f4468e0cb722d88a2945318af7522ab6ed36c214
parent 4c0c6e4b5c393f9ac47bedb62366570410be0ec0
author Kever Yang <kever.yang@rock-chips.com> 1573787077 +0800
committer Kever Yang <kever.yang@rock-chips.com> 1573979036 +0800

ram: rockchip: add common code for sdram driver

There are some function like os_reg setting, capacity detect functions,
can be used as common code for different Rockchip SoCs, add a
sdram_common.c for all these functions.

Signed-off-by: YouMin Chen <cym@rock-chips.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>