LXR uboot/arch/arm/mach-at91/arm926ejs/cpu.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2010
   4 * Reinhard Meyer, reinhard.meyer@emk-elektronik.de
   5 * (C) Copyright 2009
   6 * Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
   7 */
   8
   9#include <common.h>
  10#include <asm/io.h>
  11#include <asm/arch/hardware.h>
  12#include <asm/arch/at91_pit.h>
  13#include <asm/arch/at91_gpbr.h>
  14#include <asm/arch/clk.h>
  15
  16#ifndef CONFIG_SYS_AT91_MAIN_CLOCK
  17#define CONFIG_SYS_AT91_MAIN_CLOCK 0
  18#endif
  19
  20int arch_cpu_init(void)
  21{
  22        return at91_clock_init(CONFIG_SYS_AT91_MAIN_CLOCK);
  23}
  24
  25void arch_preboot_os(void)
  26{
  27        ulong cpiv;
  28        at91_pit_t *pit = (at91_pit_t *) ATMEL_BASE_PIT;
  29
  30        cpiv = AT91_PIT_MR_PIV_MASK(readl(&pit->piir));
  31
  32        /*
  33         * Disable PITC
  34         * Add 0x1000 to current counter to stop it faster
  35         * without waiting for wrapping back to 0
  36         */
  37        writel(cpiv + 0x1000, &pit->mr);
  38}
  39
  40#if defined(CONFIG_DISPLAY_CPUINFO)
  41int print_cpuinfo(void)
  42{
  43        char __maybe_unused buf[32];
  44
  45        printf("CPU: %s\n", ATMEL_CPU_NAME);
  46        printf("Crystal frequency: %8s MHz\n",
  47                                        strmhz(buf, get_main_clk_rate()));
  48        printf("CPU clock        : %8s MHz\n",
  49                                        strmhz(buf, get_cpu_clk_rate()));
  50        printf("Master clock     : %8s MHz\n",
  51                                        strmhz(buf, get_mck_clk_rate()));
  52
  53        return 0;
  54}
  55#endif
  56