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/pwm.h> 14 #include <linux/types.h> 15 16 struct device; 17 18 #define LPSS_MAX_PWMS 4 19 20 struct pwm_lpss_chip { 21 struct pwm_chip chip; 22 void __iomem *regs; 23 const struct pwm_lpss_boardinfo *info; 24 }; 25 26 struct pwm_lpss_boardinfo { 27 unsigned long clk_rate; 28 unsigned int npwm; 29 unsigned long base_unit_bits; 30 /* 31 * Some versions of the IP may stuck in the state machine if enable 32 * bit is not set, and hence update bit will show busy status till 33 * the reset. For the rest it may be otherwise. 34 */ 35 bool bypass; 36 /* 37 * On some devices the _PS0/_PS3 AML code of the GPU (GFX0) device 38 * messes with the PWM0 controllers state, 39 */ 40 bool other_devices_aml_touches_pwm_regs; 41 }; 42 43 extern const struct pwm_lpss_boardinfo pwm_lpss_byt_info; 44 extern const struct pwm_lpss_boardinfo pwm_lpss_bsw_info; 45 extern const struct pwm_lpss_boardinfo pwm_lpss_bxt_info; 46 extern const struct pwm_lpss_boardinfo pwm_lpss_tng_info; 47 48 struct pwm_lpss_chip *pwm_lpss_probe(struct device *dev, void __iomem *base, 49 const struct pwm_lpss_boardinfo *info); 50 51 #endif /* __PWM_LPSS_H */ 52