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 udevice; 14 15 /* struct pwm_ops: Operations for the PWM uclass */ 16 struct pwm_ops { 17 /** 18 * set_config() - Set the PWM configuration 19 * 20 * @dev: PWM device to update 21 * @channel: PWM channel to update 22 * @period_ns: PWM period in nanoseconds 23 * @duty_ns: PWM duty period in nanoseconds 24 * @return 0 if OK, -ve on error 25 */ 26 int (*set_config)(struct udevice *dev, uint channel, uint period_ns, 27 uint duty_ns); 28 29 /** 30 * set_enable() - Enable or disable the PWM 31 * 32 * @dev: PWM device to update 33 * @channel: PWM channel to update 34 * @enable: true to enable, false to disable 35 * @return 0 if OK, -ve on error 36 */ 37 int (*set_enable)(struct udevice *dev, uint channel, bool enable); 38 /** 39 * set_invert() - Set the PWM invert 40 * 41 * @dev: PWM device to update 42 * @channel: PWM channel to update 43 * @polarity: true to invert, false to keep normal polarity 44 * @return 0 if OK, -ve on error 45 */ 46 int (*set_invert)(struct udevice *dev, uint channel, bool polarity); 47 }; 48 49 #define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops) 50 51 /** 52 * pwm_set_config() - Set the PWM configuration 53 * 54 * @dev: PWM device to update 55 * @channel: PWM channel to update 56 * @period_ns: PWM period in nanoseconds 57 * @duty_ns: PWM duty period in nanoseconds 58 * @return 0 if OK, -ve on error 59 */ 60 int pwm_set_config(struct udevice *dev, uint channel, uint period_ns, 61 uint duty_ns); 62 63 /** 64 * pwm_set_enable() - Enable or disable the PWM 65 * 66 * @dev: PWM device to update 67 * @channel: PWM channel to update 68 * @enable: true to enable, false to disable 69 * @return 0 if OK, -ve on error 70 */ 71 int pwm_set_enable(struct udevice *dev, uint channel, bool enable); 72 73 /** 74 * pwm_set_invert() - Set pwm default polarity 75 * 76 * @dev: PWM device to update 77 * @channel: PWM channel to update 78 * @polarity: true to invert, false to keep normal polarity 79 * @return 0 if OK, -ve on error 80 */ 81 int pwm_set_invert(struct udevice *dev, uint channel, bool polarity); 82 83 /* Legacy interface */ 84 #ifndef CONFIG_DM_PWM 85 int pwm_init (int pwm_id, int div, int invert); 86 int pwm_config (int pwm_id, int duty_ns, int period_ns); 87 int pwm_enable (int pwm_id); 88 void pwm_disable (int pwm_id); 89 #endif 90 91 #endif /* _pwm_h_ */ 92