drivers: blink: Use DEVICE_API

Demonstrate DEVICE_API usage for blink_driver_api.

Signed-off-by: Pieter De Gendt <[email protected]>

Author: pdgendt

drivers/blink/CMakeLists.txt

@@ -2,4 +2,9 @@
 # SPDX-License-Identifier: Apache-2.0
 
 zephyr_library()
+zephyr_iterable_section(
+  NAME blink_driver_api
+  KVMA RAM_REGION GROUP RODATA_REGION
+  SUBALIGN CONFIG_LINKER_ITERABLE_SUBALIGN)
+
 zephyr_library_sources_ifdef(CONFIG_BLINK_GPIO_LED gpio_led.c)

drivers/blink/gpio_led.c

@@ -53,7 +53,7 @@ static int blink_gpio_led_set_period_ms(const struct device *dev,
 	return 0;
 }
 
-static const struct blink_driver_api blink_gpio_led_api = {
+static DEVICE_API(blink, blink_gpio_led_api) = {
 	.set_period_ms = &blink_gpio_led_set_period_ms,
 };
 

include/app/drivers/blink.h

@@ -8,6 +8,7 @@
 
 #include <zephyr/device.h>
 #include <zephyr/toolchain.h>
+#include <zephyr/sys/check.h>
 
 /**
  * @defgroup drivers_blink Blink drivers
@@ -82,10 +83,11 @@ __syscall int blink_set_period_ms(const struct device *dev,
 static inline int z_impl_blink_set_period_ms(const struct device *dev,
 					     unsigned int period_ms)
 {
-	const struct blink_driver_api *api =
-		(const struct blink_driver_api *)dev->api;
+	CHECKIF(!DEVICE_API_IS(blink, dev)) {
+		return -ENODEV;
+	}
 
-	return api->set_period_ms(dev, period_ms);
+	return DEVICE_API_GET(blink, dev)->set_period_ms(dev, period_ms);
 }
 
 /**