1 /* linux/arch/arm/mach-s5p6440/include/mach/pwm-clock.h
3 * Copyright 2008 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 * http://armlinux.simtec.co.uk/
7 * Copyright 2009 Samsung Electronics Co., Ltd.
8 * http://www.samsung.com/
10 * S5P6440 - pwm clock and timer support
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
18 * pwm_cfg_src_is_tclk() - return whether the given mux config is a tclk
19 * @cfg: The timer TCFG1 register bits shifted down to 0.
21 * Return true if the given configuration from TCFG1 is a TCLK instead
22 * any of the TDIV clocks.
24 static inline int pwm_cfg_src_is_tclk(unsigned long tcfg)
26 return tcfg == S3C2410_TCFG1_MUX_TCLK;
30 * tcfg_to_divisor() - convert tcfg1 setting to a divisor
31 * @tcfg1: The tcfg1 setting, shifted down.
33 * Get the divisor value for the given tcfg1 setting. We assume the
34 * caller has already checked to see if this is not a TCLK source.
36 static inline unsigned long tcfg_to_divisor(unsigned long tcfg1)
38 return 1 << (1 + tcfg1);
42 * pwm_tdiv_has_div1() - does the tdiv setting have a /1
44 * Return true if we have a /1 in the tdiv setting.
46 static inline unsigned int pwm_tdiv_has_div1(void)
52 * pwm_tdiv_div_bits() - calculate TCFG1 divisor value.
53 * @div: The divisor to calculate the bit information for.
55 * Turn a divisor into the necessary bit field for TCFG1.
57 static inline unsigned long pwm_tdiv_div_bits(unsigned int div)
59 return ilog2(div) - 1;
62 #define S3C_TCFG1_MUX_TCLK S3C2410_TCFG1_MUX_TCLK