arch/arm/mach-s5p6440/include/mach/pwm-clock.h

   1 /* linux/arch/arm/mach-s5p6440/include/mach/pwm-clock.h
   2  *
   3  * Copyright 2008 Simtec Electronics
   4  *      Ben Dooks <ben@simtec.co.uk>
   5  *      http://armlinux.simtec.co.uk/
   6  *
   7  * Copyright 2009 Samsung Electronics Co., Ltd.
   8  *              http://www.samsung.com/
   9  *
  10  * S5P6440 - pwm clock and timer support
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License version 2 as
  14  * published by the Free Software Foundation.
  15 */
  16
  17 /**
  18  * pwm_cfg_src_is_tclk() - return whether the given mux config is a tclk
  19  * @cfg: The timer TCFG1 register bits shifted down to 0.
  20  *
  21  * Return true if the given configuration from TCFG1 is a TCLK instead
  22  * any of the TDIV clocks.
  23  */
  24 static inline int pwm_cfg_src_is_tclk(unsigned long tcfg)
  25 {
  26         return tcfg == S3C2410_TCFG1_MUX_TCLK;
  27 }
  28
  29 /**
  30  * tcfg_to_divisor() - convert tcfg1 setting to a divisor
  31  * @tcfg1: The tcfg1 setting, shifted down.
  32  *
  33  * Get the divisor value for the given tcfg1 setting. We assume the
  34  * caller has already checked to see if this is not a TCLK source.
  35  */
  36 static inline unsigned long tcfg_to_divisor(unsigned long tcfg1)
  37 {
  38         return 1 << (1 + tcfg1);
  39 }
  40
  41 /**
  42  * pwm_tdiv_has_div1() - does the tdiv setting have a /1
  43  *
  44  * Return true if we have a /1 in the tdiv setting.
  45  */
  46 static inline unsigned int pwm_tdiv_has_div1(void)
  47 {
  48         return 0;
  49 }
  50
  51 /**
  52  * pwm_tdiv_div_bits() - calculate TCFG1 divisor value.
  53  * @div: The divisor to calculate the bit information for.
  54  *
  55  * Turn a divisor into the necessary bit field for TCFG1.
  56  */
  57 static inline unsigned long pwm_tdiv_div_bits(unsigned int div)
  58 {
  59         return ilog2(div) - 1;
  60 }
  61
  62 #define S3C_TCFG1_MUX_TCLK S3C2410_TCFG1_MUX_TCLK