1 /* linux/arch/arm/plat-samsung/include/plat/pwm-clock.h 2 * 3 * Copyright (c) 2010-2011 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 * SAMSUNG - 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_PLAT_PWM_CLOCK_H 19 #define __ASM_PLAT_PWM_CLOCK_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 */ pwm_cfg_src_is_tclk(unsigned long tcfg)28static inline int pwm_cfg_src_is_tclk(unsigned long tcfg) 29 { 30 if (soc_is_s3c24xx()) 31 return tcfg == S3C2410_TCFG1_MUX_TCLK; 32 else if (soc_is_s3c64xx() || soc_is_s5pc100()) 33 return tcfg >= S3C64XX_TCFG1_MUX_TCLK; 34 else if (soc_is_s5p6440() || soc_is_s5p6450()) 35 return 0; 36 else 37 return tcfg == S3C64XX_TCFG1_MUX_TCLK; 38 } 39 40 /** 41 * tcfg_to_divisor() - convert tcfg1 setting to a divisor 42 * @tcfg1: The tcfg1 setting, shifted down. 43 * 44 * Get the divisor value for the given tcfg1 setting. We assume the 45 * caller has already checked to see if this is not a TCLK source. 46 */ tcfg_to_divisor(unsigned long tcfg1)47static inline unsigned long tcfg_to_divisor(unsigned long tcfg1) 48 { 49 if (soc_is_s3c24xx()) 50 return 1 << (tcfg1 + 1); 51 else 52 return 1 << tcfg1; 53 } 54 55 /** 56 * pwm_tdiv_has_div1() - does the tdiv setting have a /1 57 * 58 * Return true if we have a /1 in the tdiv setting. 59 */ pwm_tdiv_has_div1(void)60static inline unsigned int pwm_tdiv_has_div1(void) 61 { 62 if (soc_is_s3c24xx()) 63 return 0; 64 else 65 return 1; 66 } 67 68 /** 69 * pwm_tdiv_div_bits() - calculate TCFG1 divisor value. 70 * @div: The divisor to calculate the bit information for. 71 * 72 * Turn a divisor into the necessary bit field for TCFG1. 73 */ pwm_tdiv_div_bits(unsigned int div)74static inline unsigned long pwm_tdiv_div_bits(unsigned int div) 75 { 76 if (soc_is_s3c24xx()) 77 return ilog2(div) - 1; 78 else 79 return ilog2(div); 80 } 81 #endif /* __ASM_PLAT_PWM_CLOCK_H */ 82