/*
   * OMAP2-specific DPLL control functions
   *
   * Copyright (C) 2011 Nokia Corporation
   * Paul Walmsley
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  
  #include <linux/kernel.h>
  #include <linux/errno.h>
  #include <linux/clk.h>
  #include <linux/io.h>
  
  #include <plat/clock.h>
  
  #include "clock.h"
  #include "cm2xxx_3xxx.h"
  #include "cm-regbits-24xx.h"
  
  /* Private functions */
  
  /**
   * _allow_idle - enable DPLL autoidle bits
   * @clk: struct clk * of the DPLL to operate on
   *
   * Enable DPLL automatic idle control.  The DPLL will enter low-power
   * stop when its downstream clocks are gated.  No return value.
   * REVISIT: DPLL can optionally enter low-power bypass by writing 0x1
   * instead.  Add some mechanism to optionally enter this mode.
   */
  static void _allow_idle(struct clk *clk)
  {
  	if (!clk || !clk->dpll_data)
  		return;
  
  	omap2xxx_cm_set_dpll_auto_low_power_stop();
  }
  
  /**
   * _deny_idle - prevent DPLL from automatically idling
   * @clk: struct clk * of the DPLL to operate on
   *
   * Disable DPLL automatic idle control.  No return value.
   */
  static void _deny_idle(struct clk *clk)
  {
  	if (!clk || !clk->dpll_data)
  		return;
  
  	omap2xxx_cm_set_dpll_disable_autoidle();
  }
  
  
  /* Public data */
  
  const struct clkops clkops_omap2xxx_dpll_ops = {
  	.allow_idle	= _allow_idle,
  	.deny_idle	= _deny_idle,
  };