LXR uboot/arch/arm/cpu/armv7/u8500/clock.c

   1/*
   2 * (C) Copyright 2009 ST-Ericsson
   3 *
   4 * See file CREDITS for list of people who contributed to this
   5 * project.
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License as
   9 * published by the Free Software Foundation; either version 2 of
  10 * the License, or (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20 * MA 02111-1307 USA
  21 */
  22
  23#include <common.h>
  24#include <asm/io.h>
  25#include <asm/arch/hardware.h>
  26
  27DECLARE_GLOBAL_DATA_PTR;
  28
  29struct clkrst {
  30        unsigned int pcken;
  31        unsigned int pckdis;
  32        unsigned int kcken;
  33        unsigned int kckdis;
  34};
  35
  36static unsigned int clkrst_base[] = {
  37        U8500_CLKRST1_BASE,
  38        U8500_CLKRST2_BASE,
  39        U8500_CLKRST3_BASE,
  40        0,
  41        U8500_CLKRST5_BASE,
  42        U8500_CLKRST6_BASE,
  43        U8500_CLKRST7_BASE,     /* ED only */
  44};
  45
  46/* Turn on peripheral clock at PRCC level */
  47void u8500_clock_enable(int periph, int cluster, int kern)
  48{
  49        struct clkrst *clkrst = (struct clkrst *) clkrst_base[periph - 1];
  50
  51        if (kern != -1)
  52                writel(1 << kern, &clkrst->kcken);
  53
  54        if (cluster != -1)
  55                writel(1 << cluster, &clkrst->pcken);
  56}
  57