1/* linux/arch/arm/plat-s3c24xx/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 * S3C24xx - pwm clock and timer support 8 */ 9 10/** 11 * pwm_cfg_src_is_tclk() - return whether the given mux config is a tclk 12 * @cfg: The timer TCFG1 register bits shifted down to 0. 13 * 14 * Return true if the given configuration from TCFG1 is a TCLK instead 15 * any of the TDIV clocks. 16 */ 17static inline int pwm_cfg_src_is_tclk(unsigned long tcfg) 18{ 19 return tcfg == S3C2410_TCFG1_MUX_TCLK; 20} 21 22/** 23 * tcfg_to_divisor() - convert tcfg1 setting to a divisor 24 * @tcfg1: The tcfg1 setting, shifted down. 25 * 26 * Get the divisor value for the given tcfg1 setting. We assume the 27 * caller has already checked to see if this is not a TCLK source. 28 */ 29static inline unsigned long tcfg_to_divisor(unsigned long tcfg1) 30{ 31 return 1 << (1 + tcfg1); 32} 33 34/** 35 * pwm_tdiv_has_div1() - does the tdiv setting have a /1 36 * 37 * Return true if we have a /1 in the tdiv setting. 38 */ 39static inline unsigned int pwm_tdiv_has_div1(void) 40{ 41 return 0; 42} 43 44/** 45 * pwm_tdiv_div_bits() - calculate TCFG1 divisor value. 46 * @div: The divisor to calculate the bit information for. 47 * 48 * Turn a divisor into the necessary bit field for TCFG1. 49 */ 50static inline unsigned long pwm_tdiv_div_bits(unsigned int div) 51{ 52 return ilog2(div) - 1; 53} 54 55#define S3C_TCFG1_MUX_TCLK S3C2410_TCFG1_MUX_TCLK 56