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         u32 saved_ctrl[MAX_PWMS];
  23 };
  24
  25 struct 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
  37 struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, struct resource *r,
  38                                      const struct pwm_lpss_boardinfo *info);
  39 int pwm_lpss_remove(struct pwm_lpss_chip *lpwm);
  40 int pwm_lpss_suspend(struct device *dev);
  41 int pwm_lpss_resume(struct device *dev);
  42
  43 #endif  /* __PWM_LPSS_H */