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pwm: lpss: Include headers we are the direct user of
[linux.git] / drivers / pwm / pwm-lpss.h
1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * Intel Low Power Subsystem PWM controller driver
4  *
5  * Copyright (C) 2014, Intel Corporation
6  *
7  * Derived from the original pwm-lpss.c
8  */
9
10 #ifndef __PWM_LPSS_H
11 #define __PWM_LPSS_H
12
13 #include <linux/pwm.h>
14 #include <linux/types.h>
15
16 struct device;
17
18 #define LPSS_MAX_PWMS                   4
19
20 struct pwm_lpss_chip {
21         struct pwm_chip chip;
22         void __iomem *regs;
23         const struct pwm_lpss_boardinfo *info;
24 };
25
26 struct pwm_lpss_boardinfo {
27         unsigned long clk_rate;
28         unsigned int npwm;
29         unsigned long base_unit_bits;
30         /*
31          * Some versions of the IP may stuck in the state machine if enable
32          * bit is not set, and hence update bit will show busy status till
33          * the reset. For the rest it may be otherwise.
34          */
35         bool bypass;
36         /*
37          * On some devices the _PS0/_PS3 AML code of the GPU (GFX0) device
38          * messes with the PWM0 controllers state,
39          */
40         bool other_devices_aml_touches_pwm_regs;
41 };
42
43 extern const struct pwm_lpss_boardinfo pwm_lpss_byt_info;
44 extern const struct pwm_lpss_boardinfo pwm_lpss_bsw_info;
45 extern const struct pwm_lpss_boardinfo pwm_lpss_bxt_info;
46 extern const struct pwm_lpss_boardinfo pwm_lpss_tng_info;
47
48 struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, void __iomem *base,
49                                      const struct pwm_lpss_boardinfo *info);
50
51 #endif  /* __PWM_LPSS_H */
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