LXR linux/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
  17void __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}
  32