1 /*- 2 * Copyright (c) 2022 Vladimir Kondratyev <wulf@FreeBSD.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #ifndef _LINUXKPI_LINUX_PWM_H_ 27 #define _LINUXKPI_LINUX_PWM_H_ 28 29 #include <linux/device.h> 30 #include <linux/err.h> 31 32 struct pwm_state { 33 uint64_t period; 34 bool enabled; 35 }; 36 37 struct pwm_device { 38 struct pwm_state state; 39 }; 40 41 static inline struct pwm_device * 42 pwm_get(struct device *dev, const char *consumer) 43 { 44 return (ERR_PTR(-ENODEV)); 45 } 46 47 static inline void 48 pwm_put(struct pwm_device *pwm) 49 { 50 } 51 52 static inline int 53 pwm_enable(struct pwm_device *pwm) 54 { 55 return (-EINVAL); 56 } 57 58 static inline void 59 pwm_disable(struct pwm_device *pwm) 60 { 61 } 62 63 static inline bool 64 pwm_is_enabled(const struct pwm_device *pwm) 65 { 66 return (false); 67 } 68 69 static inline unsigned int 70 pwm_get_relative_duty_cycle(const struct pwm_state *state, unsigned int scale) 71 { 72 return (0); 73 } 74 75 static inline int 76 pwm_set_relative_duty_cycle(struct pwm_state *state, unsigned int duty_cycle, 77 unsigned int scale) 78 { 79 return (0); 80 } 81 82 static inline void 83 pwm_get_state(const struct pwm_device *pwm, struct pwm_state *state) 84 { 85 *state = pwm->state; 86 } 87 88 static inline int 89 pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state) 90 { 91 return (-ENOTSUPP); 92 } 93 94 #endif /* _LINUXKPI_LINUX_PWM_H_ */ 95