PWM: add public APIs for PWM drivers
This adds the public APIs for PWM drivers. Also, this adds a Kconfig and an empty makefile for drivers to extend. Change-Id: I1cc0c908b6f5aeeb678b6368640d5b9a1cc9751d Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung
Anas Nashif
parent
d9af71bcff
commit
56bfe61544
5 changed files with 252 additions and 0 deletions
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@ -55,4 +55,6 @@ source "drivers/spi/Kconfig"
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source "drivers/i2c/Kconfig"
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source "drivers/pwm/Kconfig"
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endmenu
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@ -13,3 +13,4 @@ obj-$(CONFIG_UART_SIMPLE) += simple/
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obj-$(CONFIG_SPI) += spi/
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obj-$(CONFIG_GPIO) += gpio/
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obj-$(CONFIG_I2C) += i2c/
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obj-$(CONFIG_PWM) += pwm/
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37
drivers/pwm/Kconfig
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37
drivers/pwm/Kconfig
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@ -0,0 +1,37 @@
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# Kconfig - PWM configuration options
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#
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# Copyright (c) 2015 Intel Corporation
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1) Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2) Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3) Neither the name of Intel Corporation nor the names of its contributors
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# may be used to endorse or promote products derived from this software without
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# specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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menuconfig PWM
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bool "PWM (Pulse Width Modulation) Drivers"
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default n
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help
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Enable config options for PWM drivers.
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1
drivers/pwm/Makefile
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1
drivers/pwm/Makefile
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@ -0,0 +1 @@
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# Makefile for PWM drivers
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211
include/pwm.h
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211
include/pwm.h
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@ -0,0 +1,211 @@
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/*
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* Copyright (c) 2015 Intel Corporation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1) Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2) Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3) Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file Public PWM Driver APIs
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*/
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#ifndef __PWM_H__
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#define __PWM_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define PWM_ACCESS_BY_PIN 0
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#define PWM_ACCESS_ALL 1
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#include <stdint.h>
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#include <stddef.h>
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#include <device.h>
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/* driver API definition */
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typedef int (*pwm_config_t)(struct device *dev, int access_op,
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uint32_t pwm, int flags);
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typedef int (*pwm_set_values_t)(struct device *dev, int access_op,
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uint32_t pwm, uint32_t on, uint32_t off);
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typedef int (*pwm_set_duty_cycle_t)(struct device *dev, int access_op,
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uint32_t pwm, uint8_t duty);
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typedef int (*pwm_suspend_dev_t)(struct device *dev);
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typedef int (*pwm_resume_dev_t)(struct device *dev);
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struct pwm_driver_api {
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pwm_config_t config;
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pwm_set_values_t set_values;
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pwm_set_duty_cycle_t set_duty_cycle;
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pwm_suspend_dev_t suspend;
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pwm_resume_dev_t resume;
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};
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/**
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* @brief Configure a single PWM output.
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*
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* @param dev Pointer to device structure for driver instance
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* @param pwm PWM output
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* @param flags PWM configuration flags
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_pin_configure(struct device *dev, uint8_t pwm,
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int flags)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->config(dev, PWM_ACCESS_BY_PIN, pwm, flags);
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}
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/**
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* @brief Set the ON/OFF values for a single PWM output.
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*
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* @param dev Pointer to device structure for driver instance
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* @param pwm PWM output
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* @param on ON value to set the PWM to
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* @param off OFF value to set the PWM to
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_pin_set_values(struct device *dev, uint32_t pwm,
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uint32_t on, uint32_t off)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->set_values(dev, PWM_ACCESS_BY_PIN, pwm, on, off);
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}
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/**
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* @brief Set the duty cycle of a single PWM output.
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*
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* This overrides any ON/OFF values being set before.
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*
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* @param dev Pointer to device structure for driver instance.
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* @param pwm PWM output
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* @param duty Duty cycle to set the PWM to (in %, e.g. 50 => 50%)
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_pin_set_duty_cycle(struct device *dev, uint32_t pwm,
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uint8_t duty)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->set_duty_cycle(dev, PWM_ACCESS_BY_PIN, pwm, duty);
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}
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/**
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* @brief Configure all PWM outputs.
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*
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* @param dev Pointer to device structure for driver instance
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* @param flags PWM configuration flags
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_all_configure(struct device *dev, int flags)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->config(dev, PWM_ACCESS_ALL, 0, flags);
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}
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/**
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* @brief Set the ON/OFF values for all PWM outputs.
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*
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* @param dev Pointer to device structure for driver instance
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* @param on ON value to set the PWM to
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* @param off OFF value to set the PWM to
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_all_set_values(struct device *dev,
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uint32_t on, uint32_t off)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->set_values(dev, PWM_ACCESS_ALL, 0, on, off);
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}
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/**
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* @brief Set the duty cycle of all PWM outputs.
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*
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* This overrides any ON/OFF values being set before.
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*
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* @param dev Pointer to device structure for driver instance.
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* @param pwm PWM output
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* @param duty Duty cycle to set the PWM to (in %, e.g. 50 => 50%)
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_all_set_duty_cycle(struct device *dev, uint8_t duty)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->set_duty_cycle(dev, PWM_ACCESS_ALL, 0, duty);
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}
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/**
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* @brief Save the state of the device and go to low power state
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*
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* @param dev Pointer to device structure for driver instance.
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_suspend(struct device *dev)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->suspend(dev);
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}
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/**
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* @brief Restore state stored during suspend and resume operation.
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*
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* @param dev Pointer to device structure for driver instance.
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*
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* @return DEV_OK if successful, otherwise failed.
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*/
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static inline int pwm_resume(struct device *dev)
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{
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struct pwm_driver_api *api;
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api = (struct pwm_driver_api *)dev->driver_api;
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return api->resume(dev);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* __PWM_H__ */
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