tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Intel Low Power Subsystem PWM controller driver
3 *
4 * Copyright (C) 2014, Intel Corporation
5 *
6 * Derived from the original pwm-lpss.c
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#ifndef __PWM_LPSS_H
14#define __PWM_LPSS_H
15
16#include <linux/device.h>
17#include <linux/pwm.h>
18
19#define MAX_PWMS 4
20
21struct pwm_lpss_chip {
22 struct pwm_chip chip;
23 void __iomem *regs;
24 const struct pwm_lpss_boardinfo *info;
25 u32 saved_ctrl[MAX_PWMS];
26};
27
28struct pwm_lpss_boardinfo {
29 unsigned long clk_rate;
30 unsigned int npwm;
31 unsigned long base_unit_bits;
32 bool bypass;
33 /*
34 * On some devices the _PS0/_PS3 AML code of the GPU (GFX0) device
35 * messes with the PWM0 controllers state,
36 */
37 bool other_devices_aml_touches_pwm_regs;
38};
39
40struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
41 const struct pwm_lpss_boardinfo *info);
42int pwm_lpss_remove(struct pwm_lpss_chip *lpwm);
43int pwm_lpss_suspend(struct device *dev);
44int pwm_lpss_resume(struct device *dev);
45
46#endif /* __PWM_LPSS_H */