uboot中修改主频如何实现

第一个文件
/arch/arm/cpu/armv7/am33xx/clock.c
static void setup_dplls(void)
{
const struct dpll_params *params;

params = get_dpll_core_params();
do_setup_dpll(&dpll_core_regs, params);

params = get_dpll_mpu_params();
do_setup_dpll(&dpll_mpu_regs, params);

params = get_dpll_per_params();
do_setup_dpll(&dpll_per_regs, params);
writel(0x300, &cmwkup->clkdcoldodpllper);

params = get_dpll_ddr_params();
do_setup_dpll(&dpll_ddr_regs, params);
}

第二个文件
board.c没有get_dpll_mpu_params()这个函数，这有这一句可能是得到频率的
am33xx_spl_board_init()
/* Get the frequency */
dpll_mpu_opp100.m = am335x_get_efuse_mpu_max_freq(cdev);