led.h

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/*
 * Copyright (c) 2018 Linaro Limited
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef ZEPHYR_INCLUDE_DRIVERS_LED_H_
#define ZEPHYR_INCLUDE_DRIVERS_LED_H_
 
#include <errno.h>
 
#include <zephyr/types.h>
#include <zephyr/device.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct led_info {
        const char *label;
        uint32_t index;
        uint8_t num_colors;
        const uint8_t *color_mapping;
};
 
typedef int (*led_api_blink)(const struct device *dev, uint32_t led,
                             uint32_t delay_on, uint32_t delay_off);
 
typedef int (*led_api_get_info)(const struct device *dev, uint32_t led,
                                const struct led_info **info);
 
typedef int (*led_api_set_brightness)(const struct device *dev, uint32_t led,
                                      uint8_t value);
typedef int (*led_api_set_color)(const struct device *dev, uint32_t led,
                                 uint8_t num_colors, const uint8_t *color);
 
typedef int (*led_api_on)(const struct device *dev, uint32_t led);
 
typedef int (*led_api_off)(const struct device *dev, uint32_t led);
 
typedef int (*led_api_write_channels)(const struct device *dev,
                                      uint32_t start_channel,
                                      uint32_t num_channels,
                                      const uint8_t *buf);
 
__subsystem struct led_driver_api {
        /* Mandatory callbacks. */
        led_api_on on;
        led_api_off off;
        /* Optional callbacks. */
        led_api_blink blink;
        led_api_get_info get_info;
        led_api_set_brightness set_brightness;
        led_api_set_color set_color;
        led_api_write_channels write_channels;
};
 
__syscall int led_blink(const struct device *dev, uint32_t led,
                            uint32_t delay_on, uint32_t delay_off);
 
static inline int z_impl_led_blink(const struct device *dev, uint32_t led,
                                   uint32_t delay_on, uint32_t delay_off)
{
        const struct led_driver_api *api =
                (const struct led_driver_api *)dev->api;
 
        if (api->blink == NULL) {
                return -ENOSYS;
        }
        return api->blink(dev, led, delay_on, delay_off);
}
 
__syscall int led_get_info(const struct device *dev, uint32_t led,
                           const struct led_info **info);
 
static inline int z_impl_led_get_info(const struct device *dev, uint32_t led,
                                      const struct led_info **info)
{
        const struct led_driver_api *api =
                (const struct led_driver_api *)dev->api;
 
        if (api->get_info == NULL) {
                *info = NULL;
                return -ENOSYS;
        }
        return api->get_info(dev, led, info);
}
 
__syscall int led_set_brightness(const struct device *dev, uint32_t led,
                                     uint8_t value);
 
static inline int z_impl_led_set_brightness(const struct device *dev,
                                            uint32_t led,
                                            uint8_t value)
{
        const struct led_driver_api *api =
                (const struct led_driver_api *)dev->api;
 
        if (api->set_brightness == NULL) {
                return -ENOSYS;
        }
        return api->set_brightness(dev, led, value);
}
 
__syscall int led_write_channels(const struct device *dev,
                                 uint32_t start_channel,
                                 uint32_t num_channels, const uint8_t *buf);
 
static inline int
z_impl_led_write_channels(const struct device *dev, uint32_t start_channel,
                          uint32_t num_channels, const uint8_t *buf)
{
        const struct led_driver_api *api =
                (const struct led_driver_api *)dev->api;
 
        if (api->write_channels == NULL) {
                return -ENOSYS;
        }
        return api->write_channels(dev, start_channel, num_channels, buf);
}
 
__syscall int led_set_channel(const struct device *dev,
                              uint32_t channel, uint8_t value);
 
static inline int z_impl_led_set_channel(const struct device *dev,
                                         uint32_t channel, uint8_t value)
{
        return z_impl_led_write_channels(dev, channel, 1, &value);
}
 
__syscall int led_set_color(const struct device *dev, uint32_t led,
                            uint8_t num_colors, const uint8_t *color);
 
static inline int z_impl_led_set_color(const struct device *dev, uint32_t led,
                                       uint8_t num_colors, const uint8_t *color)
{
        const struct led_driver_api *api =
                (const struct led_driver_api *)dev->api;
 
        if (api->set_color == NULL) {
                return -ENOSYS;
        }
        return api->set_color(dev, led, num_colors, color);
}
 
__syscall int led_on(const struct device *dev, uint32_t led);
 
static inline int z_impl_led_on(const struct device *dev, uint32_t led)
{
        const struct led_driver_api *api =
                (const struct led_driver_api *)dev->api;
 
        return api->on(dev, led);
}
 
__syscall int led_off(const struct device *dev, uint32_t led);
 
static inline int z_impl_led_off(const struct device *dev, uint32_t led)
{
        const struct led_driver_api *api =
                (const struct led_driver_api *)dev->api;
 
        return api->off(dev, led);
}
 
#ifdef __cplusplus
}
#endif
 
#include <syscalls/led.h>
 
#endif  /* ZEPHYR_INCLUDE_DRIVERS_LED_H_ */