projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | /* SPDX-License-Identifier: GPL-2.0+ */ |
| 3f129280 DL |
2 | /* |
| 3 | * header file for pwm driver. | |
| 4 | * | |
| fc760cb8 | 5 | * Copyright 2016 Google Inc. |
| 3f129280 DL |
6 | * Copyright (c) 2011 samsung electronics |
| 7 | * Donghwa Lee <dh09.lee@samsung.com> | |
| 3f129280 DL |
8 | */ |
| 9 | ||
| 10 | #ifndef _pwm_h_ | |
| 11 | #define _pwm_h_ | |
| 12 | ||
| 401d1c4f SG |
13 | struct udevice; |
| 14 | ||
| fc760cb8 SG |
15 | /* struct pwm_ops: Operations for the PWM uclass */ |
| 16 | struct pwm_ops { | |
| 17 | /** | |
| 18 | * set_config() - Set the PWM configuration | |
| 19 | * | |
| fefa713b ANY |
20 | * Change both the PWM device's period and it's duty period if |
| 21 | * possible. Otherwise, set an appropriate duty period that best | |
| 22 | * matches the given period_ns / duty_ns ratio for the device. | |
| 23 | * | |
| fc760cb8 SG |
24 | * @dev: PWM device to update |
| 25 | * @channel: PWM channel to update | |
| 26 | * @period_ns: PWM period in nanoseconds | |
| 27 | * @duty_ns: PWM duty period in nanoseconds | |
| 28 | * @return 0 if OK, -ve on error | |
| 29 | */ | |
| 30 | int (*set_config)(struct udevice *dev, uint channel, uint period_ns, | |
| 31 | uint duty_ns); | |
| 32 | ||
| 33 | /** | |
| 34 | * set_enable() - Enable or disable the PWM | |
| 35 | * | |
| 36 | * @dev: PWM device to update | |
| 37 | * @channel: PWM channel to update | |
| 38 | * @enable: true to enable, false to disable | |
| 39 | * @return 0 if OK, -ve on error | |
| 40 | */ | |
| 41 | int (*set_enable)(struct udevice *dev, uint channel, bool enable); | |
| 0b60111a KY |
42 | /** |
| 43 | * set_invert() - Set the PWM invert | |
| 44 | * | |
| 45 | * @dev: PWM device to update | |
| 46 | * @channel: PWM channel to update | |
| 47 | * @polarity: true to invert, false to keep normal polarity | |
| 48 | * @return 0 if OK, -ve on error | |
| 49 | */ | |
| 50 | int (*set_invert)(struct udevice *dev, uint channel, bool polarity); | |
| fc760cb8 SG |
51 | }; |
| 52 | ||
| 53 | #define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops) | |
| 54 | ||
| 55 | /** | |
| 56 | * pwm_set_config() - Set the PWM configuration | |
| 57 | * | |
| fefa713b ANY |
58 | * Change both the PWM device's period and it's duty period if |
| 59 | * possible. Otherwise, set an appropriate duty period that best | |
| 60 | * matches the given period_ns / duty_ns ratio for the device. | |
| 61 | * | |
| fc760cb8 SG |
62 | * @dev: PWM device to update |
| 63 | * @channel: PWM channel to update | |
| 64 | * @period_ns: PWM period in nanoseconds | |
| 65 | * @duty_ns: PWM duty period in nanoseconds | |
| 185f812c | 66 | * Return: 0 if OK, -ve on error |
| fc760cb8 SG |
67 | */ |
| 68 | int pwm_set_config(struct udevice *dev, uint channel, uint period_ns, | |
| 69 | uint duty_ns); | |
| 70 | ||
| 71 | /** | |
| 72 | * pwm_set_enable() - Enable or disable the PWM | |
| 73 | * | |
| 74 | * @dev: PWM device to update | |
| 75 | * @channel: PWM channel to update | |
| 76 | * @enable: true to enable, false to disable | |
| 185f812c | 77 | * Return: 0 if OK, -ve on error |
| fc760cb8 SG |
78 | */ |
| 79 | int pwm_set_enable(struct udevice *dev, uint channel, bool enable); | |
| 80 | ||
| 0b60111a KY |
81 | /** |
| 82 | * pwm_set_invert() - Set pwm default polarity | |
| 83 | * | |
| 84 | * @dev: PWM device to update | |
| 85 | * @channel: PWM channel to update | |
| 86 | * @polarity: true to invert, false to keep normal polarity | |
| 185f812c | 87 | * Return: 0 if OK, -ve on error |
| 0b60111a KY |
88 | */ |
| 89 | int pwm_set_invert(struct udevice *dev, uint channel, bool polarity); | |
| 90 | ||
| fc760cb8 SG |
91 | /* Legacy interface */ |
| 92 | #ifndef CONFIG_DM_PWM | |
| 3f129280 DL |
93 | int pwm_init (int pwm_id, int div, int invert); |
| 94 | int pwm_config (int pwm_id, int duty_ns, int period_ns); | |
| 95 | int pwm_enable (int pwm_id); | |
| 96 | void pwm_disable (int pwm_id); | |
| fc760cb8 | 97 | #endif |
| 3f129280 DL |
98 | |
| 99 | #endif /* _pwm_h_ */ |