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/* linux/arch/arm/plat-samsung/include/plat/pwm-clock.h
*
* Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Copyright 2008 Openmoko, Inc.
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* SAMSUNG - pwm clock and timer support
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __ASM_PLAT_PWM_CLOCK_H
#define __ASM_PLAT_PWM_CLOCK_H __FILE__
/**
* pwm_cfg_src_is_tclk() - return whether the given mux config is a tclk
* @tcfg: The timer TCFG1 register bits shifted down to 0.
*
* Return true if the given configuration from TCFG1 is a TCLK instead
* any of the TDIV clocks.
*/
static inline int pwm_cfg_src_is_tclk(unsigned long tcfg)
{
if (soc_is_s3c24xx())
return tcfg == S3C2410_TCFG1_MUX_TCLK;
else if (soc_is_s3c64xx() || soc_is_s5pc100())
return tcfg >= S3C64XX_TCFG1_MUX_TCLK;
else if (soc_is_s5p6440() || soc_is_s5p6450())
return 0;
else
return tcfg == S3C64XX_TCFG1_MUX_TCLK;
}
/**
* tcfg_to_divisor() - convert tcfg1 setting to a divisor
* @tcfg1: The tcfg1 setting, shifted down.
*
* Get the divisor value for the given tcfg1 setting. We assume the
* caller has already checked to see if this is not a TCLK source.
*/
static inline unsigned long tcfg_to_divisor(unsigned long tcfg1)
{
if (soc_is_s3c24xx())
return 1 << (tcfg1 + 1);
else
return 1 << tcfg1;
}
/**
* pwm_tdiv_has_div1() - does the tdiv setting have a /1
*
* Return true if we have a /1 in the tdiv setting.
*/
static inline unsigned int pwm_tdiv_has_div1(void)
{
if (soc_is_s3c24xx())
return 0;
else
return 1;
}
/**
* pwm_tdiv_div_bits() - calculate TCFG1 divisor value.
* @div: The divisor to calculate the bit information for.
*
* Turn a divisor into the necessary bit field for TCFG1.
*/
static inline unsigned long pwm_tdiv_div_bits(unsigned int div)
{
if (soc_is_s3c24xx())
return ilog2(div) - 1;
else
return ilog2(div);
}
#endif /* __ASM_PLAT_PWM_CLOCK_H */
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