timer.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <device/mmio.h>
#include <soc/mcucfg.h>
#include <soc/timer.h>
 
void timer_prepare(void)
{
        /* Set XGPT_IDX to 0, then the bit field of XGPT_CTL will be programmed
         * with following definition.
         *
         * [10: 8] Clock mode
         *         100: 26Mhz / 4
         *         010: 26Mhz / 2
         *         001: 26Mhz
         * [ 1: 1] Halt-on-debug enable bit
         * [ 0: 0] XGPT enable bit
         */
        write32(&mt8173_mcucfg->xgpt_idx, 0);
        /* Set clock mode to 13Mhz and enable XGPT */
        write32(&mt8173_mcucfg->xgpt_ctl, (0x1 | ((26 / GPT_MHZ) << 8)));
}