clk.h 2.3 KB

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  1. /* Copyright (c) 2009, Code Aurora Forum. All rights reserved.
  2. *
  3. * Redistribution and use in source and binary forms, with or without
  4. * modification, are permitted provided that the following conditions are
  5. * met:
  6. * * Redistributions of source code must retain the above copyright
  7. * notice, this list of conditions and the following disclaimer.
  8. * * Redistributions in binary form must reproduce the above
  9. * copyright notice, this list of conditions and the following
  10. * disclaimer in the documentation and/or other materials provided
  11. * with the distribution.
  12. * * Neither the name of Code Aurora Forum, Inc. nor the names of its
  13. * contributors may be used to endorse or promote products derived
  14. * from this software without specific prior written permission.
  15. *
  16. * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
  17. * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  18. * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
  19. * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
  20. * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21. * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22. * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  23. * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  24. * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
  25. * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
  26. * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27. *
  28. */
  29. #ifndef __MACH_CLK_H
  30. #define __MACH_CLK_H
  31. /* Magic rate value for use with PM QOS to request the board's maximum
  32. * supported AXI rate. PM QOS will only pass positive s32 rate values
  33. * through to the clock driver, so INT_MAX is used.
  34. */
  35. #define MSM_AXI_MAX_FREQ LONG_MAX
  36. enum clk_reset_action {
  37. CLK_RESET_DEASSERT = 0,
  38. CLK_RESET_ASSERT = 1
  39. };
  40. struct clk;
  41. /* Rate is minimum clock rate in Hz */
  42. int clk_set_min_rate(struct clk *clk, unsigned long rate);
  43. /* Rate is maximum clock rate in Hz */
  44. int clk_set_max_rate(struct clk *clk, unsigned long rate);
  45. /* Assert/Deassert reset to a hardware block associated with a clock */
  46. int clk_reset(struct clk *clk, enum clk_reset_action action);
  47. /* Set clock-specific configuration parameters */
  48. int clk_set_flags(struct clk *clk, unsigned long flags);
  49. #endif