Orange Pi5 kernel

// 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);
}