arch/arm/mach-s5p64x0/include/mach/pwm-clock.h

   1 /* linux/arch/arm/mach-s5p64x0/include/mach/pwm-clock.h
   2  *
   3  * Copyright (c) 2009-2010 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com
   5  *
   6  * Copyright 2008 Openmoko, Inc.
   7  * Copyright 2008 Simtec Electronics
   8  *      Ben Dooks <ben@simtec.co.uk>
   9  *      http://armlinux.simtec.co.uk/
  10  *
  11  * S5P64X0 - pwm clock and timer support
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2 as
  15  * published by the Free Software Foundation.
  16 */
  17
  18 #ifndef __ASM_ARCH_PWMCLK_H
  19 #define __ASM_ARCH_PWMCLK_H __FILE__
  20
  21 /**
  22  * pwm_cfg_src_is_tclk() - return whether the given mux config is a tclk
  23  * @tcfg: The timer TCFG1 register bits shifted down to 0.
  24  *
  25  * Return true if the given configuration from TCFG1 is a TCLK instead
  26  * any of the TDIV clocks.
  27  */
  28 static inline int pwm_cfg_src_is_tclk(unsigned long tcfg)
  29 {
  30         return 0;
  31 }
  32
  33 /**
  34  * tcfg_to_divisor() - convert tcfg1 setting to a divisor
  35  * @tcfg1: The tcfg1 setting, shifted down.
  36  *
  37  * Get the divisor value for the given tcfg1 setting. We assume the
  38  * caller has already checked to see if this is not a TCLK source.
  39  */
  40 static inline unsigned long tcfg_to_divisor(unsigned long tcfg1)
  41 {
  42         return 1 << tcfg1;
  43 }
  44
  45 /**
  46  * pwm_tdiv_has_div1() - does the tdiv setting have a /1
  47  *
  48  * Return true if we have a /1 in the tdiv setting.
  49  */
  50 static inline unsigned int pwm_tdiv_has_div1(void)
  51 {
  52         return 1;
  53 }
  54
  55 /**
  56  * pwm_tdiv_div_bits() - calculate TCFG1 divisor value.
  57  * @div: The divisor to calculate the bit information for.
  58  *
  59  * Turn a divisor into the necessary bit field for TCFG1.
  60  */
  61 static inline unsigned long pwm_tdiv_div_bits(unsigned int div)
  62 {
  63         return ilog2(div);
  64 }
  65
  66 #define S3C_TCFG1_MUX_TCLK 0
  67
  68 #endif /* __ASM_ARCH_PWMCLK_H */