56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/* linux/arch/arm/plat-s3c24xx/include/mach/pwm-clock.h
|
|
*
|
|
* Copyright 2008 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
* http://armlinux.simtec.co.uk/
|
|
*
|
|
* S3C24xx - pwm clock and timer support
|
|
*/
|
|
|
|
/**
|
|
* pwm_cfg_src_is_tclk() - return whether the given mux config is a tclk
|
|
* @cfg: 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)
|
|
{
|
|
return tcfg == S3C2410_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)
|
|
{
|
|
return 1 << (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)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* 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)
|
|
{
|
|
return ilog2(div) - 1;
|
|
}
|
|
|
|
#define S3C_TCFG1_MUX_TCLK S3C2410_TCFG1_MUX_TCLK
|