1 /* 2 * header file for pwm driver. 3 * 4 * Copyright 2016 Google Inc. 5 * Copyright (c) 2011 samsung electronics 6 * Donghwa Lee <dh09.lee@samsung.com> 7 * 8 * SPDX-License-Identifier: GPL-2.0+ 9 */ 10 11 #ifndef _pwm_h_ 12 #define _pwm_h_ 13 14 /* struct pwm_ops: Operations for the PWM uclass */ 15 struct pwm_ops { 16 /** 17 * set_config() - Set the PWM configuration 18 * 19 * @dev: PWM device to update 20 * @channel: PWM channel to update 21 * @period_ns: PWM period in nanoseconds 22 * @duty_ns: PWM duty period in nanoseconds 23 * @return 0 if OK, -ve on error 24 */ 25 int (*set_config)(struct udevice *dev, uint channel, uint period_ns, 26 uint duty_ns); 27 28 /** 29 * set_enable() - Enable or disable the PWM 30 * 31 * @dev: PWM device to update 32 * @channel: PWM channel to update 33 * @enable: true to enable, false to disable 34 * @return 0 if OK, -ve on error 35 */ 36 int (*set_enable)(struct udevice *dev, uint channel, bool enable); 37 /** 38 * set_invert() - Set the PWM invert 39 * 40 * @dev: PWM device to update 41 * @channel: PWM channel to update 42 * @polarity: true to invert, false to keep normal polarity 43 * @return 0 if OK, -ve on error 44 */ 45 int (*set_invert)(struct udevice *dev, uint channel, bool polarity); 46 }; 47 48 #define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops) 49 50 /** 51 * pwm_set_config() - Set the PWM configuration 52 * 53 * @dev: PWM device to update 54 * @channel: PWM channel to update 55 * @period_ns: PWM period in nanoseconds 56 * @duty_ns: PWM duty period in nanoseconds 57 * @return 0 if OK, -ve on error 58 */ 59 int pwm_set_config(struct udevice *dev, uint channel, uint period_ns, 60 uint duty_ns); 61 62 /** 63 * pwm_set_enable() - Enable or disable the PWM 64 * 65 * @dev: PWM device to update 66 * @channel: PWM channel to update 67 * @enable: true to enable, false to disable 68 * @return 0 if OK, -ve on error 69 */ 70 int pwm_set_enable(struct udevice *dev, uint channel, bool enable); 71 72 /** 73 * pwm_set_invert() - Set pwm default polarity 74 * 75 * @dev: PWM device to update 76 * @channel: PWM channel to update 77 * @polarity: true to invert, false to keep normal polarity 78 * @return 0 if OK, -ve on error 79 */ 80 int pwm_set_invert(struct udevice *dev, uint channel, bool polarity); 81 82 /* Legacy interface */ 83 #ifndef CONFIG_DM_PWM 84 int pwm_init (int pwm_id, int div, int invert); 85 int pwm_config (int pwm_id, int duty_ns, int period_ns); 86 int pwm_enable (int pwm_id); 87 void pwm_disable (int pwm_id); 88 #endif 89 90 #endif /* _pwm_h_ */ 91