tegra20_clk_register_emc
clk = tegra20_clk_register_emc(clk_base + CLK_SOURCE_EMC, false);
clk = tegra20_clk_register_emc(clk_base + CLK_SOURCE_EMC, true);
struct clk *tegra20_clk_register_emc(void __iomem *ioaddr, bool low_jitter);