refactor(nordic): dts cleanup and DK gpio driver removal

diff --git a/nordic/trezor/boards/arm/t3w1_revA_nrf52832/Kconfig.defconfig b/nordic/trezor/boards/arm/t3w1_revA_nrf52832/Kconfig.defconfig
index d9c7264f..cabb0f15 100644
--- a/nordic/trezor/boards/arm/t3w1_revA_nrf52832/Kconfig.defconfig
+++ b/nordic/trezor/boards/arm/t3w1_revA_nrf52832/Kconfig.defconfig
@@ -1,4 +1,4 @@
-# T3W1 REVA NRF52833 board configuration
+# T3W1 REVA NRF52832 board configuration
 
 # Copyright (c) 2019 Nordic Semiconductor ASA
 # SPDX-License-Identifier: Apache-2.0
diff --git a/nordic/trezor/boards/arm/t3w1_revA_nrf52832/board.yml b/nordic/trezor/boards/arm/t3w1_revA_nrf52832/board.yml
index 787481d9..ae3dd299 100644
--- a/nordic/trezor/boards/arm/t3w1_revA_nrf52832/board.yml
+++ b/nordic/trezor/boards/arm/t3w1_revA_nrf52832/board.yml
@@ -4,6 +4,6 @@
 board:
   name: t3w1_revA_nrf52832
   full_name: t3w1_revA_nrf52832
-  vendor: vendor
+  vendor: trezor
   socs:
     - name: nrf52832
diff --git a/nordic/trezor/boards/arm/t3w1_revA_nrf52832/t3w1_revA_nrf52832.dts b/nordic/trezor/boards/arm/t3w1_revA_nrf52832/t3w1_revA_nrf52832.dts
index 4b7d86e9..85c895f0 100644
--- a/nordic/trezor/boards/arm/t3w1_revA_nrf52832/t3w1_revA_nrf52832.dts
+++ b/nordic/trezor/boards/arm/t3w1_revA_nrf52832/t3w1_revA_nrf52832.dts
@@ -7,7 +7,6 @@
 /dts-v1/;
 #include <nordic/nrf52832_ciaa.dtsi>
 #include "t3w1_revA_nrf52832-pinctrl.dtsi"
-#include <zephyr/dt-bindings/input/input-event-codes.h>
 
 / {
 	model = "T3W1 REVA NRF52832";
@@ -22,52 +21,33 @@
 		zephyr,code-partition = &slot0_partition;
 	};
 
-	leds {
+	outputs {
 		compatible = "gpio-leds";
-
-		led0: led_0 {
+		output_0: output_0 {
 			gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>;
-			label = "Reserved";
 		};
-
-	};
-
-	buttons {
-		compatible = "gpio-keys";
-
-		button0: button_0 {
-			gpios = <&gpio0 14 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>;
-			label = "Stay in bootloader";
-			zephyr,code = <INPUT_KEY_0>;
+		output_1: output_1 {
+			gpios = <&gpio0 29 (GPIO_ACTIVE_HIGH)>;
 		};
 	};
 
-	spi_sync_in
-	{
+	inputs {
 		compatible = "gpio-keys";
-		spi_ready: spi_ready {
-		gpios = <&gpio0 12 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>;
-		label = "Trezor has data ready";
+		input_0: input_0 {
+			gpios = <&gpio0 14 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>;
 		};
-	};
-	spi_sync_out
-	{
-		compatible = "gpio-leds";
-		spi_request: spi_request {
-			gpios = <&gpio0 29 (GPIO_ACTIVE_HIGH)>;
-			label = "NRF is requesting to send data to trezor";
+		input_1: input_1 {
+			gpios = <&gpio0 12 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>;
 		};
 	};
 
-	/* These aliases are provided for compatibility with samples */
 	aliases {
-		led0 = &led0;
-		sw0 = &button0;
-		bootloader-botton0 = &button0;
-		mcuboot-button0 = &button0;
+		mcuboot-button0 = &input_0;
 		watchdog0 = &wdt0;
-		spi-ready = &spi_ready;
-		spi-request = &spi_request;
+		spi-ready = &input_1;
+		spi-request = &output_1;
+		stay-in-bootloader = &input_0;
+		reserved-output = &output_0;
 	};
 };
 
@@ -106,7 +86,7 @@
 	pinctrl-1 = <&spi0_sleep>;
 	pinctrl-names = "default", "sleep";
 	cs-gpios = <&gpio0 0 GPIO_ACTIVE_LOW>;
-	reg_my_spi_master: spi-dev-a@0 {
+	trezor_spi_dev: spi-dev-a@0 {
 		reg = <0>;
 	};
 };
diff --git a/nordic/trezor/boards/arm/t3w1_revA_nrf52832/t3w1_revA_nrf52832.yaml b/nordic/trezor/boards/arm/t3w1_revA_nrf52832/t3w1_revA_nrf52832.yaml
index 6ce3429f..5e792d98 100644
--- a/nordic/trezor/boards/arm/t3w1_revA_nrf52832/t3w1_revA_nrf52832.yaml
+++ b/nordic/trezor/boards/arm/t3w1_revA_nrf52832/t3w1_revA_nrf52832.yaml
@@ -1,5 +1,5 @@
 identifier: t3w1_revA_nrf52832
-name: tw31-revA-NRF52832
+name: t3w1-revA-NRF52832
 type: mcu
 arch: arm
 ram: 64
diff --git a/nordic/trezor/trezor-ble/prj.conf b/nordic/trezor/trezor-ble/prj.conf
index 2e1aa2cc..3b1d6362 100644
--- a/nordic/trezor/trezor-ble/prj.conf
+++ b/nordic/trezor/trezor-ble/prj.conf
@@ -91,9 +91,6 @@ CONFIG_NVS=y
 CONFIG_SETTINGS=y
 CONFIG_SETTINGS_RUNTIME=y
 
-# Enable DK LED and Buttons library
-CONFIG_DK_LIBRARY=y
-
 # This example requires more stack
 CONFIG_MAIN_STACK_SIZE=1152
 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=4096
diff --git a/nordic/trezor/trezor-ble/src/main.c b/nordic/trezor/trezor-ble/src/main.c
index 9ad90efe..2b23edc3 100644
--- a/nordic/trezor/trezor-ble/src/main.c
+++ b/nordic/trezor/trezor-ble/src/main.c
@@ -32,8 +32,6 @@
 #include <zephyr/bluetooth/hci.h>
 #include <zephyr/bluetooth/uuid.h>
 
-#include <dk_buttons_and_leds.h>
-
 #include <zephyr/settings/settings.h>
 
 #include <zephyr/logging/log.h>
diff --git a/nordic/trezor/trezor-ble/src/signals/signals.c b/nordic/trezor/trezor-ble/src/signals/signals.c
index e4d76c43..3616514f 100644
--- a/nordic/trezor/trezor-ble/src/signals/signals.c
+++ b/nordic/trezor/trezor-ble/src/signals/signals.c
@@ -16,57 +16,56 @@
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+
+#include <zephyr/drivers/gpio.h>
 #include <zephyr/kernel.h>
 #include <zephyr/logging/log.h>
-#include <zephyr/settings/settings.h>
-#include <zephyr/types.h>
 
 #include <signals/signals.h>
 
-#include <dk_buttons_and_leds.h>
-
 #define LOG_MODULE_NAME signals
 LOG_MODULE_REGISTER(LOG_MODULE_NAME);
 
-#define OUT_RESERVED DK_LED1
-
-#define IN_STAY_IN_BOOTLOADER DK_BTN1_MSK
+static const struct gpio_dt_spec stay_in_bootloader_btn =
+    GPIO_DT_SPEC_GET(DT_ALIAS(stay_in_bootloader), gpios);
+static const struct gpio_dt_spec reserved_output =
+    GPIO_DT_SPEC_GET(DT_ALIAS(reserved_output), gpios);
 
 static K_SEM_DEFINE(signals_ok, 0, 1);
 
 static bool out_reserved = false;
 
-void button_changed(uint32_t button_state, uint32_t has_changed) {}
-
-static void configure_gpio(void) {
+bool signals_init(void) {
   int err;
 
-  err = dk_buttons_init(button_changed);
+  err = gpio_pin_configure_dt(&stay_in_bootloader_btn, GPIO_INPUT);
   if (err) {
-    LOG_ERR("Cannot init INPUT (err: %d)", err);
+    LOG_ERR("Cannot configure bootloader button (err: %d)", err);
+    return false;
   }
 
-  err = dk_leds_init();
+  err = gpio_pin_configure_dt(&reserved_output, GPIO_OUTPUT_INACTIVE);
   if (err) {
-    LOG_ERR("Cannot init OUTPUT (err: %d)", err);
+    LOG_ERR("Cannot configure reserved output (err: %d)", err);
+    return false;
   }
-}
-
-bool signals_is_stay_in_bootloader(void) {
-  return (dk_get_buttons() & IN_STAY_IN_BOOTLOADER) != 0;
-}
-
-bool signals_init(void) {
-  configure_gpio();
 
   k_sem_give(&signals_ok);
 
   return true;
 }
 
+bool signals_is_stay_in_bootloader(void) {
+  return gpio_pin_get_dt(&stay_in_bootloader_btn) > 0;
+}
+
 void signals_set_reserved(bool set) {
+  int rc = gpio_pin_set_dt(&reserved_output, set);
+  if (rc < 0) {
+    LOG_ERR("Failed to set reserved output: %d", rc);
+    return;
+  }
   out_reserved = set;
-  dk_set_led(OUT_RESERVED, set);
 }
 
 bool signals_out_get_reserved(void) { return out_reserved; }
diff --git a/nordic/trezor/trezor-ble/src/trz_comm/spi.c b/nordic/trezor/trezor-ble/src/trz_comm/spi.c
index 8063ee78..10a1b082 100644
--- a/nordic/trezor/trezor-ble/src/trz_comm/spi.c
+++ b/nordic/trezor/trezor-ble/src/trz_comm/spi.c
@@ -46,18 +46,13 @@ const struct device *spi_dev;
 static struct k_poll_signal spi_done_sig =
     K_POLL_SIGNAL_INITIALIZER(spi_done_sig);
 
-struct spi_cs_control spim_cs = {
-    .gpio = SPI_CS_GPIOS_DT_SPEC_GET(DT_NODELABEL(reg_my_spi_master)),
-    .delay = 0,
-};
-
 static const struct spi_config spi_cfg = {
     .operation = SPI_WORD_SET(8) | SPI_TRANSFER_MSB,
     .frequency = 8000000,
     .slave = 0,
     .cs =
         {
-            .gpio = SPI_CS_GPIOS_DT_SPEC_GET(DT_NODELABEL(reg_my_spi_master)),
+            .gpio = SPI_CS_GPIOS_DT_SPEC_GET(DT_NODELABEL(trezor_spi_dev)),
             .delay = 0,
         },
 };
@@ -109,7 +104,7 @@ void spi_init(void) {
   if (!device_is_ready(spi_dev)) {
     LOG_WRN("SPI master device not ready!");
   }
-  if (!device_is_ready(spim_cs.gpio.port)) {
+  if (!device_is_ready(spi_cfg.cs.gpio.port)) {
     LOG_WRN("SPI master chip select device not ready!");
   }