Develop-Tips-Uboot

How to change the ddr frequency

Edit sdram-params property in the dmc node.
Max Limit : 800MHz(DDR3), 533MHz(LPDDR3)

rockchip,sdram-params: SDRAM base parameters, in this order:
    NOC timing    - value for ddrtiming register
    NOC activate    - value for activate register
    ddrconf        - value for ddrconf register
    DDR frequency in MHz
    DRAM type (3=DDR3, 6=LPDDR3)
    stride        - stride value for soc_con2 register
    odt             - 1 to enable DDR ODT, 0 to disable