lib: dk_buttons_and_lets: Remove DK_LIBRARY_BUTTON_NO_ISR

The nRF54L15PDK is no longer supported.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>

lib/dk_buttons_and_leds/Kconfig

@@ -12,36 +12,12 @@ if DK_LIBRARY
 
 config DK_LIBRARY_BUTTON_SCAN_INTERVAL
 	int "Scanning interval of buttons in milliseconds"
-	default 50 if DK_LIBRARY_BUTTON_NO_ISR
 	default 10
 
 config DK_LIBRARY_DYNAMIC_BUTTON_HANDLERS
 	bool "Enable the runtime assignable button handler API"
 	default y
 
-config DK_LIBRARY_BUTTON_NO_ISR
-	bool "Poll buttons unconditionally (no interrupts) [EXPERIMENTAL]"
-	# Workaround for buttons on nRF54L15 PDK in revision 0.2.x.
-	default y if BOARD_NRF54L15PDK_NRF54L15_CPUAPP && (BOARD_REVISION = "0.2.0" || BOARD_REVISION = "0.2.1")
-	select EXPERIMENTAL
-	help
-	  With this option disabled, the module periodically scans all the
-	  available buttons until no button is pressed. If no button is
-	  pressed, the module uses GPIO interrupts to detect the first button
-	  press. On the first button press, the module switches back to
-	  periodically scanning buttons.
-
-	  Enable this option to avoid relying on GPIO interrupts at all and
-	  to unconditionally scan all buttons periodically. Please note that
-	  the constant scanning activity increases the overall power
-	  consumption of the system.
-
-	  For example, in case the application uses Button 3 or 4, the option
-	  must be set for the nRF54L15 PDK (PCA10156) revisions
-	  v0.2.0 AA0-ES2, v0.2.0 AA0-ES3, and v0.2.1 AB0-ES5.
-	  These versions of the PDK have Buttons 3 and 4 connected to
-	  the GPIO port which does not support interrupts.
-
 module = DK_LIBRARY
 module-str = DK library
 source "${ZEPHYR_BASE}/subsys/logging/Kconfig.template.log_config"

lib/dk_buttons_and_leds/dk_buttons_and_leds.c

@@ -129,9 +129,7 @@ static void buttons_scan_fn(struct k_work *work)
 	static bool initial_run = true;
 	uint32_t button_scan;
 
-	__ASSERT_NO_MSG(!IS_ENABLED(CONFIG_DK_LIBRARY_BUTTON_NO_ISR) || !irq_enabled);
-
-	if (!IS_ENABLED(CONFIG_DK_LIBRARY_BUTTON_NO_ISR) && irq_enabled) {
+	if (irq_enabled) {
 		/* Disable GPIO interrupts for edge triggered devices.
 		 * Devices that are configured with active high interrupts are already disabled.
 		 */
@@ -159,7 +157,7 @@ static void buttons_scan_fn(struct k_work *work)
 
 	last_button_scan = button_scan;
 
-	if (IS_ENABLED(CONFIG_DK_LIBRARY_BUTTON_NO_ISR) || (button_scan != 0)) {
+	if (button_scan != 0) {
 		k_work_reschedule(&buttons_scan,
 		  K_MSEC(CONFIG_DK_LIBRARY_BUTTON_SCAN_INTERVAL));
 	} else {
@@ -238,6 +236,7 @@ static void button_pressed(const struct device *gpio_dev, struct gpio_callback *
 
 int dk_buttons_init(button_handler_t button_handler)
 {
+	uint32_t pin_mask = 0;
 	int err;
 
 	button_handler_cb = button_handler;
@@ -259,31 +258,27 @@ int dk_buttons_init(button_handler_t button_handler)
 		}
 	}
 
-	if (!IS_ENABLED(CONFIG_DK_LIBRARY_BUTTON_NO_ISR)) {
-		uint32_t pin_mask = 0;
-
-		for (size_t i = 0; i < ARRAY_SIZE(buttons); i++) {
-			/* Module starts in scanning mode and will switch to
-			 * callback mode if no button is pressed.
-			 */
-			err = gpio_pin_interrupt_configure_dt(&buttons[i],
-							      GPIO_INT_DISABLE);
-			if (err) {
-				LOG_ERR("Cannot disable callbacks()");
-				return err;
-			}
-
-			pin_mask |= BIT(buttons[i].pin);
+	for (size_t i = 0; i < ARRAY_SIZE(buttons); i++) {
+		/* Module starts in scanning mode and will switch to
+		 * callback mode if no button is pressed.
+		 */
+		err = gpio_pin_interrupt_configure_dt(&buttons[i],
+						      GPIO_INT_DISABLE);
+		if (err) {
+			LOG_ERR("Cannot disable callbacks()");
+			return err;
 		}
 
-		gpio_init_callback(&gpio_cb, button_pressed, pin_mask);
+		pin_mask |= BIT(buttons[i].pin);
+	}
 
-		for (size_t i = 0; i < ARRAY_SIZE(buttons); i++) {
-			err = gpio_add_callback(buttons[i].port, &gpio_cb);
-			if (err) {
-				LOG_ERR("Cannot add callback");
-				return err;
-			}
+	gpio_init_callback(&gpio_cb, button_pressed, pin_mask);
+
+	for (size_t i = 0; i < ARRAY_SIZE(buttons); i++) {
+		err = gpio_add_callback(buttons[i].port, &gpio_cb);
+		if (err) {
+			LOG_ERR("Cannot add callback");
+			return err;
 		}
 	}