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1 | /* linux/arch/arm/mach-s3c6400/include/mach/pwm-clock.h |
2 | * | |
3 | * Copyright 2008 Openmoko, Inc. | |
4 | * Copyright 2008 Simtec Electronics | |
5 | * Ben Dooks <ben@simtec.co.uk> | |
6 | * http://armlinux.simtec.co.uk/ | |
7 | * | |
8 | * S3C64xx - pwm clock and timer support | |
9 | */ | |
10 | ||
11 | /** | |
12 | * pwm_cfg_src_is_tclk() - return whether the given mux config is a tclk | |
13 | * @tcfg: The timer TCFG1 register bits shifted down to 0. | |
14 | * | |
15 | * Return true if the given configuration from TCFG1 is a TCLK instead | |
16 | * any of the TDIV clocks. | |
17 | */ | |
18 | static inline int pwm_cfg_src_is_tclk(unsigned long tcfg) | |
19 | { | |
20 | return tcfg >= S3C64XX_TCFG1_MUX_TCLK; | |
21 | } | |
22 | ||
23 | /** | |
24 | * tcfg_to_divisor() - convert tcfg1 setting to a divisor | |
25 | * @tcfg1: The tcfg1 setting, shifted down. | |
26 | * | |
27 | * Get the divisor value for the given tcfg1 setting. We assume the | |
28 | * caller has already checked to see if this is not a TCLK source. | |
29 | */ | |
30 | static inline unsigned long tcfg_to_divisor(unsigned long tcfg1) | |
31 | { | |
32 | return 1 << tcfg1; | |
33 | } | |
34 | ||
35 | /** | |
36 | * pwm_tdiv_has_div1() - does the tdiv setting have a /1 | |
37 | * | |
38 | * Return true if we have a /1 in the tdiv setting. | |
39 | */ | |
40 | static inline unsigned int pwm_tdiv_has_div1(void) | |
41 | { | |
42 | return 1; | |
43 | } | |
44 | ||
45 | /** | |
46 | * pwm_tdiv_div_bits() - calculate TCFG1 divisor value. | |
47 | * @div: The divisor to calculate the bit information for. | |
48 | * | |
49 | * Turn a divisor into the necessary bit field for TCFG1. | |
50 | */ | |
51 | static inline unsigned long pwm_tdiv_div_bits(unsigned int div) | |
52 | { | |
53 | return ilog2(div); | |
54 | } | |
55 | ||
56 | #define S3C_TCFG1_MUX_TCLK S3C64XX_TCFG1_MUX_TCLK |