/* 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 */