1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * header file for pwm driver. 4 * 5 * Copyright 2016 Google Inc. 6 * Copyright (c) 2011 samsung electronics 7 * Donghwa Lee <dh09.lee@samsung.com> 8 */ 9 10 #ifndef _pwm_h_ 11 #define _pwm_h_ 12 13 /* struct pwm_ops: Operations for the PWM uclass */ 14 struct pwm_ops { 15 /** 16 * set_config() - Set the PWM configuration 17 * 18 * @dev: PWM device to update 19 * @channel: PWM channel to update 20 * @period_ns: PWM period in nanoseconds 21 * @duty_ns: PWM duty period in nanoseconds 22 * @return 0 if OK, -ve on error 23 */ 24 int (*set_config)(struct udevice *dev, uint channel, uint period_ns, 25 uint duty_ns); 26 27 /** 28 * set_enable() - Enable or disable the PWM 29 * 30 * @dev: PWM device to update 31 * @channel: PWM channel to update 32 * @enable: true to enable, false to disable 33 * @return 0 if OK, -ve on error 34 */ 35 int (*set_enable)(struct udevice *dev, uint channel, bool enable); 36 /** 37 * set_invert() - Set the PWM invert 38 * 39 * @dev: PWM device to update 40 * @channel: PWM channel to update 41 * @polarity: true to invert, false to keep normal polarity 42 * @return 0 if OK, -ve on error 43 */ 44 int (*set_invert)(struct udevice *dev, uint channel, bool polarity); 45 }; 46 47 #define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops) 48 49 /** 50 * pwm_set_config() - Set the PWM configuration 51 * 52 * @dev: PWM device to update 53 * @channel: PWM channel to update 54 * @period_ns: PWM period in nanoseconds 55 * @duty_ns: PWM duty period in nanoseconds 56 * @return 0 if OK, -ve on error 57 */ 58 int pwm_set_config(struct udevice *dev, uint channel, uint period_ns, 59 uint duty_ns); 60 61 /** 62 * pwm_set_enable() - Enable or disable the PWM 63 * 64 * @dev: PWM device to update 65 * @channel: PWM channel to update 66 * @enable: true to enable, false to disable 67 * @return 0 if OK, -ve on error 68 */ 69 int pwm_set_enable(struct udevice *dev, uint channel, bool enable); 70 71 /** 72 * pwm_set_invert() - Set pwm default polarity 73 * 74 * @dev: PWM device to update 75 * @channel: PWM channel to update 76 * @polarity: true to invert, false to keep normal polarity 77 * @return 0 if OK, -ve on error 78 */ 79 int pwm_set_invert(struct udevice *dev, uint channel, bool polarity); 80 81 /* Legacy interface */ 82 #ifndef CONFIG_DM_PWM 83 int pwm_init (int pwm_id, int div, int invert); 84 int pwm_config (int pwm_id, int duty_ns, int period_ns); 85 int pwm_enable (int pwm_id); 86 void pwm_disable (int pwm_id); 87 #endif 88 89 #endif /* _pwm_h_ */ 90