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drivers: led: Add system call handler support

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Add system call handler support to LED subsystem. No buffers are
involved in any of the API's and hence the syscall support is
straightforward.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
This commit is contained in:
Manivannan Sadhasivam 2018-05-03 23:46:58 +05:30 • committed by Andrew Boie
commit 26babfc622
4 changed files with 52 additions and 4 deletions
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2
drivers/led/CMakeLists.txt
View file

@ -1 +1,3 @@
zephyr_sources_ifdef(CONFIG_LP3943 lp3943.c) zephyr_sources_ifdef(CONFIG_LP3943 lp3943.c)
zephyr_sources_ifdef(CONFIG_USERSPACE led_handlers.c)

33
drivers/led/led_handlers.c Normal file
View file

@ -0,0 +1,33 @@
/*
* Copyright (c) 2018 Linaro Ltd.
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <syscall_handler.h>
#include <led.h>
_SYSCALL_HANDLER(led_blink, dev, led, delay_on, delay_off)
{
_SYSCALL_DRIVER_LED(dev, blink);
return _impl_led_blink((struct device *)dev, led, delay_on,
delay_off);
}
_SYSCALL_HANDLER(led_set_brightness, dev, led, value)
{
_SYSCALL_DRIVER_LED(dev, set_brightness);
return _impl_led_set_brightness((struct device *)dev, led, value);
}
_SYSCALL_HANDLER(led_on, dev, led)
{
_SYSCALL_DRIVER_LED(dev, on);
return _impl_led_on((struct device *)dev, led);
}
_SYSCALL_HANDLER(led_off, dev, led)
{
_SYSCALL_DRIVER_LED(dev, off);
return _impl_led_off((struct device *)dev, led);
}

20
include/led.h
View file

@ -71,7 +71,10 @@ struct led_driver_api {
* @param delay_off Time period (in milliseconds) an LED should be OFF * @param delay_off Time period (in milliseconds) an LED should be OFF
* @return 0 on success, negative on error * @return 0 on success, negative on error
*/ */
static inline int led_blink(struct device *dev, u32_t led, __syscall int led_blink(struct device *dev, u32_t led,
u32_t delay_on, u32_t delay_off);
static inline int _impl_led_blink(struct device *dev, u32_t led,
u32_t delay_on, u32_t delay_off) u32_t delay_on, u32_t delay_off)
{ {
const struct led_driver_api *api = dev->driver_api; const struct led_driver_api *api = dev->driver_api;
@ -90,7 +93,10 @@ static inline int led_blink(struct device *dev, u32_t led,
* @param value Brightness value to set in percent * @param value Brightness value to set in percent
* @return 0 on success, negative on error * @return 0 on success, negative on error
*/ */
static inline int led_set_brightness(struct device *dev, u32_t led, __syscall int led_set_brightness(struct device *dev, u32_t led,
u8_t value);
static inline int _impl_led_set_brightness(struct device *dev, u32_t led,
u8_t value) u8_t value)
{ {
const struct led_driver_api *api = dev->driver_api; const struct led_driver_api *api = dev->driver_api;
@ -107,7 +113,9 @@ static inline int led_set_brightness(struct device *dev, u32_t led,
* @param led LED channel/pin * @param led LED channel/pin
* @return 0 on success, negative on error * @return 0 on success, negative on error
*/ */
static inline int led_on(struct device *dev, u32_t led) __syscall int led_on(struct device *dev, u32_t led);
static inline int _impl_led_on(struct device *dev, u32_t led)
{ {
const struct led_driver_api *api = dev->driver_api; const struct led_driver_api *api = dev->driver_api;
@ -123,11 +131,15 @@ static inline int led_on(struct device *dev, u32_t led)
* @param led LED channel/pin * @param led LED channel/pin
* @return 0 on success, negative on error * @return 0 on success, negative on error
*/ */
static inline int led_off(struct device *dev, u32_t led) __syscall int led_off(struct device *dev, u32_t led);
static inline int _impl_led_off(struct device *dev, u32_t led)
{ {
const struct led_driver_api *api = dev->driver_api; const struct led_driver_api *api = dev->driver_api;
return api->off(dev, led); return api->off(dev, led);
} }
#include <syscalls/led.h>
#endif /* _ZEPHYR_LED_H */ #endif /* _ZEPHYR_LED_H */

1
scripts/gen_kobject_list.py
View file

@ -35,6 +35,7 @@ subsystems = [
"i2c_driver_api", "i2c_driver_api",
"i2s_driver_api", "i2s_driver_api",
"ipm_driver_api", "ipm_driver_api",
"led_driver_api",
"pinmux_driver_api", "pinmux_driver_api",
"pwm_driver_api", "pwm_driver_api",
"entropy_driver_api", "entropy_driver_api",