// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Cobalt time initialization.
 *
 *  Copyright (C) 2007  Yoichi Yuasa <yuasa@linux-mips.org>
 */
#include <linux/i8253.h>
#include <linux/init.h>

#include <asm/gt64120.h>
#include <asm/time.h>

#define GT641XX_BASE_CLOCK      50000000        /* 50MHz */

void __init plat_time_init(void)
{
        u32 start, end;
        int i = HZ / 10;

        setup_pit_timer();

        gt641xx_set_base_clock(GT641XX_BASE_CLOCK);

        /*
         * MIPS counter frequency is measured during a 100msec interval
         * using GT64111 timer0.
         */
        while (!gt641xx_timer0_state())
                ;

        start = read_c0_count();

        while (i--)
                while (!gt641xx_timer0_state())
                        ;

        end = read_c0_count();

        mips_hpt_frequency = (end - start) * 10;
        printk(KERN_INFO "MIPS counter frequency %dHz\n", mips_hpt_frequency);
}