diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/include/pwm.h | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/include/pwm.h')
| -rw-r--r-- | roms/u-boot/include/pwm.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/roms/u-boot/include/pwm.h b/roms/u-boot/include/pwm.h new file mode 100644 index 000000000..668551e4b --- /dev/null +++ b/roms/u-boot/include/pwm.h @@ -0,0 +1,99 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * header file for pwm driver. + * + * Copyright 2016 Google Inc. + * Copyright (c) 2011 samsung electronics + * Donghwa Lee <dh09.lee@samsung.com> + */ + +#ifndef _pwm_h_ +#define _pwm_h_ + +struct udevice; + +/* struct pwm_ops: Operations for the PWM uclass */ +struct pwm_ops { + /** + * set_config() - Set the PWM configuration + * + * Change both the PWM device's period and it's duty period if + * possible. Otherwise, set an appropriate duty period that best + * matches the given period_ns / duty_ns ratio for the device. + * + * @dev: PWM device to update + * @channel: PWM channel to update + * @period_ns: PWM period in nanoseconds + * @duty_ns: PWM duty period in nanoseconds + * @return 0 if OK, -ve on error + */ + int (*set_config)(struct udevice *dev, uint channel, uint period_ns, + uint duty_ns); + + /** + * set_enable() - Enable or disable the PWM + * + * @dev: PWM device to update + * @channel: PWM channel to update + * @enable: true to enable, false to disable + * @return 0 if OK, -ve on error + */ + int (*set_enable)(struct udevice *dev, uint channel, bool enable); + /** + * set_invert() - Set the PWM invert + * + * @dev: PWM device to update + * @channel: PWM channel to update + * @polarity: true to invert, false to keep normal polarity + * @return 0 if OK, -ve on error + */ + int (*set_invert)(struct udevice *dev, uint channel, bool polarity); +}; + +#define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops) + +/** + * pwm_set_config() - Set the PWM configuration + * + * Change both the PWM device's period and it's duty period if + * possible. Otherwise, set an appropriate duty period that best + * matches the given period_ns / duty_ns ratio for the device. + * + * @dev: PWM device to update + * @channel: PWM channel to update + * @period_ns: PWM period in nanoseconds + * @duty_ns: PWM duty period in nanoseconds + * @return 0 if OK, -ve on error + */ +int pwm_set_config(struct udevice *dev, uint channel, uint period_ns, + uint duty_ns); + +/** + * pwm_set_enable() - Enable or disable the PWM + * + * @dev: PWM device to update + * @channel: PWM channel to update + * @enable: true to enable, false to disable + * @return 0 if OK, -ve on error + */ +int pwm_set_enable(struct udevice *dev, uint channel, bool enable); + +/** + * pwm_set_invert() - Set pwm default polarity + * + * @dev: PWM device to update + * @channel: PWM channel to update + * @polarity: true to invert, false to keep normal polarity + * @return 0 if OK, -ve on error + */ +int pwm_set_invert(struct udevice *dev, uint channel, bool polarity); + +/* Legacy interface */ +#ifndef CONFIG_DM_PWM +int pwm_init (int pwm_id, int div, int invert); +int pwm_config (int pwm_id, int duty_ns, int period_ns); +int pwm_enable (int pwm_id); +void pwm_disable (int pwm_id); +#endif + +#endif /* _pwm_h_ */ |