int (*ddr_change_freq)(uint32_t nMHz) = NULL;
long (*ddr_round_rate)(uint32_t nMHz) = NULL;
void (*ddr_set_auto_self_refresh)(bool en) = NULL;
+int (*ddr_recalc_rate)(void) = NULL;
extern struct ion_platform_data ion_pdata;
extern void __init ion_reserve(struct ion_platform_data *data);