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
  21 struct 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
  28 struct 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
  40 struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
  41                                      const struct pwm_lpss_boardinfo *info);
  42 int pwm_lpss_remove(struct pwm_lpss_chip *lpwm);
  43 int pwm_lpss_suspend(struct device *dev);
  44 int pwm_lpss_resume(struct device *dev);
  45
  46 #endif  /* __PWM_LPSS_H */