arch/arm/mach-s5pv210/include/mach/pwm-clock.h

   1 /* linux/arch/arm/mach-s5pv210/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 (c) 2009 Samsung Electronics Co., Ltd.
   8  *              http://www.samsung.com/
   9  *
  10  * Based on arch/arm/plat-s3c24xx/include/mach/pwm-clock.h
  11  *
  12  * S5PV210 - pwm clock and timer support
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17 */
  18
  19 #ifndef __ASM_ARCH_PWMCLK_H
  20 #define __ASM_ARCH_PWMCLK_H __FILE__
  21
  22 /**
  23  * pwm_cfg_src_is_tclk() - return whether the given mux config is a tclk
  24  * @cfg: The timer TCFG1 register bits shifted down to 0.
  25  *
  26  * Return true if the given configuration from TCFG1 is a TCLK instead
  27  * any of the TDIV clocks.
  28  */
  29 static inline int pwm_cfg_src_is_tclk(unsigned long tcfg)
  30 {
  31         return tcfg == S3C2410_TCFG1_MUX_TCLK;
  32 }
  33
  34 /**
  35  * tcfg_to_divisor() - convert tcfg1 setting to a divisor
  36  * @tcfg1: The tcfg1 setting, shifted down.
  37  *
  38  * Get the divisor value for the given tcfg1 setting. We assume the
  39  * caller has already checked to see if this is not a TCLK source.
  40  */
  41 static inline unsigned long tcfg_to_divisor(unsigned long tcfg1)
  42 {
  43         return 1 << (1 + tcfg1);
  44 }
  45
  46 /**
  47  * pwm_tdiv_has_div1() - does the tdiv setting have a /1
  48  *
  49  * Return true if we have a /1 in the tdiv setting.
  50  */
  51 static inline unsigned int pwm_tdiv_has_div1(void)
  52 {
  53         return 0;
  54 }
  55
  56 /**
  57  * pwm_tdiv_div_bits() - calculate TCFG1 divisor value.
  58  * @div: The divisor to calculate the bit information for.
  59  *
  60  * Turn a divisor into the necessary bit field for TCFG1.
  61  */
  62 static inline unsigned long pwm_tdiv_div_bits(unsigned int div)
  63 {
  64         return ilog2(div) - 1;
  65 }
  66
  67 #define S3C_TCFG1_MUX_TCLK S3C2410_TCFG1_MUX_TCLK
  68
  69 #endif /* __ASM_ARCH_PWMCLK_H */