arch/arm/mach-msm/include/mach/clk.h

   1 /* Copyright (c) 2009, Code Aurora Forum. All rights reserved.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License version 2 and
   5  * only version 2 as published by the Free Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  */
  12 #ifndef __MACH_CLK_H
  13 #define __MACH_CLK_H
  14
  15 /* Magic rate value for use with PM QOS to request the board's maximum
  16  * supported AXI rate. PM QOS will only pass positive s32 rate values
  17  * through to the clock driver, so INT_MAX is used.
  18  */
  19 #define MSM_AXI_MAX_FREQ        LONG_MAX
  20
  21 enum clk_reset_action {
  22         CLK_RESET_DEASSERT      = 0,
  23         CLK_RESET_ASSERT        = 1
  24 };
  25
  26 struct clk;
  27
  28 /* Rate is minimum clock rate in Hz */
  29 int clk_set_min_rate(struct clk *clk, unsigned long rate);
  30
  31 /* Rate is maximum clock rate in Hz */
  32 int clk_set_max_rate(struct clk *clk, unsigned long rate);
  33
  34 /* Assert/Deassert reset to a hardware block associated with a clock */
  35 int clk_reset(struct clk *clk, enum clk_reset_action action);
  36
  37 /* Set clock-specific configuration parameters */
  38 int clk_set_flags(struct clk *clk, unsigned long flags);
  39
  40 #endif