summaryrefslogtreecommitdiffstats
path: root/drivers/pwm/pwm-lpss.h
blob: 1a2575d25beadb1000442e83b545fc8bb824fce1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
/*
 * Intel Low Power Subsystem PWM controller driver
 *
 * Copyright (C) 2014, Intel Corporation
 *
 * Derived from the original pwm-lpss.c
 *
 * 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 __PWM_LPSS_H
#define __PWM_LPSS_H

#include <linux/device.h>
#include <linux/pwm.h>

#define MAX_PWMS			4

struct pwm_lpss_chip {
	struct pwm_chip chip;
	void __iomem *regs;
	const struct pwm_lpss_boardinfo *info;
	u32 saved_ctrl[MAX_PWMS];
};

struct pwm_lpss_boardinfo {
	unsigned long clk_rate;
	unsigned int npwm;
	unsigned long base_unit_bits;
	bool bypass;
	/* Some devices have AML code messing with the state underneath us */
	bool check_power_on_resume;
};

struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
				     const struct pwm_lpss_boardinfo *info);
int pwm_lpss_remove(struct pwm_lpss_chip *lpwm);
int pwm_lpss_suspend(struct device *dev);
int pwm_lpss_resume(struct device *dev);

#endif	/* __PWM_LPSS_H */