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 int pwm_lpss_remove(struct pwm_lpss_chip *lpwm);
  39
  40 #endif  /* __PWM_LPSS_H */