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| author | Simon Glass <sjg@chromium.org> | 2016-01-21 19:44:54 -0700 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2016-01-21 20:42:36 -0700 |
| commit | fc760cb8c4cc16061079fb45e2e0bad11e5acedc (patch) | |
| tree | d796c4f0ae64c7d5d32b26f4fdcd9a145be5f52f /include | |
| parent | d4bf91ada110aeb26f844cbe95cdb9b1ddb87f19 (diff) | |
| download | u-boot-fc760cb8c4cc16061079fb45e2e0bad11e5acedc.zip u-boot-fc760cb8c4cc16061079fb45e2e0bad11e5acedc.tar.gz u-boot-fc760cb8c4cc16061079fb45e2e0bad11e5acedc.tar.bz2 | |
dm: pwm: Add a PWM uclass
Add a uclass that supports Pulse Width Modulation (PWM) devices. It
provides methods to enable/disable and configure the device.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/dm/uclass-id.h | 1 | ||||
| -rw-r--r-- | include/pwm.h | 53 |
2 files changed, 54 insertions, 0 deletions
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index b5f43ae..8f0381d 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -51,6 +51,7 @@ enum uclass_id { UCLASS_PINCTRL, /* Pinctrl (pin muxing/configuration) device */ UCLASS_PINCONFIG, /* Pin configuration node device */ UCLASS_PMIC, /* PMIC I/O device */ + UCLASS_PWM, /* Pulse-width modulator */ UCLASS_PWRSEQ, /* Power sequence device */ UCLASS_REGULATOR, /* Regulator device */ UCLASS_RESET, /* Reset device */ diff --git a/include/pwm.h b/include/pwm.h index f24f220..851915e 100644 --- a/include/pwm.h +++ b/include/pwm.h @@ -1,6 +1,7 @@ /* * header file for pwm driver. * + * Copyright 2016 Google Inc. * Copyright (c) 2011 samsung electronics * Donghwa Lee <dh09.lee@samsung.com> * @@ -10,9 +11,61 @@ #ifndef _pwm_h_ #define _pwm_h_ +/* struct pwm_ops: Operations for the PWM uclass */ +struct pwm_ops { + /** + * set_config() - Set the PWM configuration + * + * @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); +}; + +#define pwm_get_ops(dev) ((struct pwm_ops *)(dev)->driver->ops) + +/** + * pwm_set_config() - Set the PWM configuration + * + * @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); + +/* 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_ */ |