1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Carsten Langgaard, carstenl@mips.com 4*4882a593Smuzhiyun * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved. 5*4882a593Smuzhiyun * 6*4882a593Smuzhiyun * Setting up the clock on the MIPS boards. 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #include <linux/init.h> 10*4882a593Smuzhiyun #include <linux/time.h> 11*4882a593Smuzhiyun #include <linux/err.h> 12*4882a593Smuzhiyun #include <linux/clk.h> 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #include <asm/time.h> 15*4882a593Smuzhiyun #include <asm/mach-ar7/ar7.h> 16*4882a593Smuzhiyun plat_time_init(void)17*4882a593Smuzhiyunvoid __init plat_time_init(void) 18*4882a593Smuzhiyun { 19*4882a593Smuzhiyun struct clk *cpu_clk; 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun /* Initialize ar7 clocks so the CPU clock frequency is correct */ 22*4882a593Smuzhiyun ar7_init_clocks(); 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun cpu_clk = clk_get(NULL, "cpu"); 25*4882a593Smuzhiyun if (IS_ERR(cpu_clk)) { 26*4882a593Smuzhiyun printk(KERN_ERR "unable to get cpu clock\n"); 27*4882a593Smuzhiyun return; 28*4882a593Smuzhiyun } 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun mips_hpt_frequency = clk_get_rate(cpu_clk) / 2; 31*4882a593Smuzhiyun } 32