drm/vc4: txp: Protect device resources
[platform/kernel/linux-starfive.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/device.h>
14 #include <linux/pwm.h>
15
16 #define MAX_PWMS                        4
17
18 struct pwm_lpss_chip {
19         struct pwm_chip chip;
20         void __iomem *regs;
21         const struct pwm_lpss_boardinfo *info;
22 };
23
24 struct pwm_lpss_boardinfo {
25         unsigned long clk_rate;
26         unsigned int npwm;
27         unsigned long base_unit_bits;
28         bool bypass;
29         /*
30          * On some devices the _PS0/_PS3 AML code of the GPU (GFX0) device
31          * messes with the PWM0 controllers state,
32          */
33         bool other_devices_aml_touches_pwm_regs;
34 };
35
36 struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
37                                      const struct pwm_lpss_boardinfo *info);
38
39 #endif  /* __PWM_LPSS_H */