LXR linux/drivers/pwm/pwm-lpss.h

   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 */
  47