arch/mips/ar7/time.c

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