samples: buttons: remove logging

This sample has inconsistent use of logging
mixed with printks. Since logging is not really
needed here, remove it in favor of printk.
This makes it more aligned with the other samples.

Signed-off-by: Mirko Covizzi <[email protected]>

Author: MirkoCovizzi

samples/buttons/src/main.c

@@ -6,7 +6,6 @@
 
 #include <zephyr/kernel.h>    /* k_busy_wait() */
 #include <zephyr/sys_clock.h> /* K_MSEC() */
-#include <zephyr/logging/log.h>
 
 #include <lite_timer.h>
 #include <lite_buttons.h>
@@ -18,8 +17,6 @@
 
 #include <board-config.h>
 
-LOG_MODULE_REGISTER(buttons_sample, LOG_LEVEL_INF);
-
 #define PIN_BTN_0 BOARD_PIN_BTN_0
 #define PIN_BTN_1 BOARD_PIN_BTN_1
 #define PIN_BTN_2 BOARD_PIN_BTN_2
@@ -29,7 +26,7 @@ static volatile bool running;
 
 static void button_handler(uint8_t pin, uint8_t action)
 {
-	LOG_INF("Button event callback: %d, %d", pin, action);
+	printk("Button event callback: %d, %d\n", pin, action);
 
 	if (pin == PIN_BTN_3) {
 		running = false;
@@ -40,7 +37,7 @@ int main(void)
 {
 	int err;
 
-	LOG_INF("Buttons sample started\n");
+	printk("Buttons sample started\n");
 
 #if CONFIG_SOFTDEVICE
 	err = nrf_sdh_enable_request();
@@ -89,17 +86,17 @@ int main(void)
 
 	err = lite_buttons_init(configs, ARRAY_SIZE(configs), LITE_BUTTONS_DETECTION_DELAY_MIN_US);
 	if (err) {
-		LOG_ERR("Failed to initialize buttons, err: %d", err);
+		printk("Failed to initialize buttons, err: %d\n", err);
 		return err;
 	}
 
 	err = lite_buttons_enable();
 	if (err) {
-		LOG_ERR("Failed to enable buttons, err: %d", err);
+		printk("Failed to enable buttons, err: %d\n", err);
 		return err;
 	}
 
-	LOG_INF("Buttons initialized, press button 3 to terminate");
+	printk("Buttons initialized, press button 3 to terminate\n");
 
 	while (running) {
 		/* Sleep */
@@ -108,11 +105,11 @@ int main(void)
 
 	err = lite_buttons_deinit();
 	if (err) {
-		LOG_ERR("Failed to deinitialize buttons, err: %d", err);
+		printk("Failed to deinitialize buttons, err: %d\n", err);
 		return err;
 	}
 
-	LOG_INF("Bye");
+	printk("Bye\n");
 
 	return 0;
 }