LXR linux/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
  18struct pwm_lpss_chip {
  19        struct pwm_chip chip;
  20        void __iomem *regs;
  21        const struct pwm_lpss_boardinfo *info;
  22        u32 saved_ctrl[MAX_PWMS];
  23};
  24
  25struct pwm_lpss_boardinfo {
  26        unsigned long clk_rate;
  27        unsigned int npwm;
  28        unsigned long base_unit_bits;
  29        bool bypass;
  30        /*
  31         * On some devices the _PS0/_PS3 AML code of the GPU (GFX0) device
  32         * messes with the PWM0 controllers state,
  33         */
  34        bool other_devices_aml_touches_pwm_regs;
  35};
  36
  37struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
  38                                     const struct pwm_lpss_boardinfo *info);
  39int pwm_lpss_remove(struct pwm_lpss_chip *lpwm);
  40int pwm_lpss_suspend(struct device *dev);
  41int pwm_lpss_resume(struct device *dev);
  42
  43#endif  /* __PWM_LPSS_H */
  44