From fc760cb8c4cc16061079fb45e2e0bad11e5acedc Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 21 Jan 2016 19:44:54 -0700 Subject: 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 --- include/dm/uclass-id.h | 1 + include/pwm.h | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+) (limited to 'include') 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 * @@ -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_ */ -- cgit v1.1