drivers: misc: ethos_u: Create the ethos_u_common for every vendor

doc/releases/migration-guide-4.2.rst

@@ -347,6 +347,8 @@ Misc
 * All memc_flexram_* namespaced things including kconfigs and C API
   have been changed to just flexram_*.
 
+* Select ``CONFIG_ETHOS_U`` instead ``CONFIG_ARM_ETHOS_U`` to enable Ethos-U NPU driver.
+
 Bluetooth
 *********
 

drivers/misc/CMakeLists.txt

@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
-add_subdirectory_ifdef(CONFIG_ARM_ETHOS_U ethos_u)
+add_subdirectory_ifdef(CONFIG_ETHOS_U ethos_u)
 add_subdirectory_ifdef(CONFIG_FT800 ft8xx)
 add_subdirectory_ifdef(CONFIG_GROVE_LCD_RGB grove_lcd_rgb)
 add_subdirectory_ifdef(CONFIG_PIO_RPI_PICO pio_rpi_pico)

drivers/misc/Kconfig

@@ -5,6 +5,7 @@
 
 menu "Miscellaneous Drivers"
 
+source "drivers/misc/ethos_u/Kconfig"
 source "drivers/misc/ft8xx/Kconfig"
 source "drivers/misc/grove_lcd_rgb/Kconfig"
 source "drivers/misc/pio_rpi_pico/Kconfig"

drivers/misc/ethos_u/CMakeLists.txt

@@ -3,4 +3,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
 zephyr_library()
-zephyr_library_sources(ethos_u.c)
+zephyr_library_sources(ethos_u_common.c)
+zephyr_library_sources_ifdef(CONFIG_ETHOS_U_ARM ethos_u_arm.c)

drivers/misc/ethos_u/Kconfig

@@ -0,0 +1,24 @@
+# Copyright (c) 2025 Renesas Electronics Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+menuconfig ETHOS_U
+	bool "Ethos-U NPU driver"
+	select ARM_ETHOS_U
+	help
+	  Enable Ethos-U NPU driver.
+
+if ETHOS_U
+
+config ETHOS_U_INIT_PRIORITY
+	int "Ethos-U init priority"
+	default KERNEL_INIT_PRIORITY_DEVICE
+	help
+	  Ethos-U device driver initialization priority.
+
+module = ETHOS_U
+module-str = ethos_u
+source "subsys/logging/Kconfig.template.log_config"
+
+rsource "Kconfig.arm_mps3"
+
+endif # ETHOS_U

drivers/misc/ethos_u/Kconfig.arm_mps3

@@ -0,0 +1,14 @@
+# Copyright 2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+config ETHOS_U_ARM
+	bool "Arm Ethos-U NPU driver"
+	default y
+	depends on DT_HAS_ARM_ETHOS_U_ENABLED
+	help
+	  Enables Arm Ethos-U NPU driver.
+
+choice ARM_ETHOS_U_NPU_CONFIG
+	default ARM_ETHOS_U55_128
+endchoice # ARM_ETHOS_U_NPU_CONFIG

drivers/misc/ethos_u/ethos_u.c → drivers/misc/ethos_u/ethos_u_arm.c

@@ -4,117 +4,17 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-#include "zephyr/sys_clock.h"
+#include <zephyr/irq.h>
+#include <zephyr/init.h>
 #include <zephyr/device.h>
 #include <zephyr/devicetree.h>
-#include <zephyr/init.h>
-#include <zephyr/kernel.h>
-#include <zephyr/irq.h>
-#include <zephyr/sys/util.h>
-
+#include <zephyr/logging/log.h>
 #include <ethosu_driver.h>
 
-#include <zephyr/logging/log.h>
-LOG_MODULE_REGISTER(ethos_u, CONFIG_ARM_ETHOS_U_LOG_LEVEL);
+#include "ethos_u_common.h"
 
 #define DT_DRV_COMPAT arm_ethos_u
-
-/*******************************************************************************
- * Re-implementation/Overrides __((weak)) symbol functions from ethosu_driver.c
- * To handle mutex and semaphores
- *******************************************************************************/
-
-void *ethosu_mutex_create(void)
-{
-	struct k_mutex *mutex;
-
-	mutex = k_malloc(sizeof(*mutex));
-	if (mutex == NULL) {
-		LOG_ERR("Failed allocate mutex");
-		return NULL;
-	}
-
-	k_mutex_init(mutex);
-
-	return (void *)mutex;
-}
-
-int ethosu_mutex_lock(void *mutex)
-{
-	int status;
-
-	status = k_mutex_lock((struct k_mutex *)mutex, K_FOREVER);
-	if (status != 0) {
-		LOG_ERR("Failed to lock mutex with error - %d", status);
-		return -1;
-	}
-
-	return 0;
-}
-
-int ethosu_mutex_unlock(void *mutex)
-{
-	k_mutex_unlock((struct k_mutex *)mutex);
-	return 0;
-}
-
-void *ethosu_semaphore_create(void)
-{
-	struct k_sem *sem;
-
-	sem = k_malloc(sizeof(*sem));
-	if (sem == NULL) {
-		LOG_ERR("Failed to allocate semaphore");
-		return NULL;
-	}
-
-	k_sem_init(sem, 0, 100);
-
-	return (void *)sem;
-}
-
-int ethosu_semaphore_take(void *sem, uint64_t timeout)
-{
-	int status;
-
-	status = k_sem_take((struct k_sem *)sem, (timeout == ETHOSU_SEMAPHORE_WAIT_FOREVER)
-							 ? K_FOREVER
-							 : Z_TIMEOUT_TICKS(timeout));
-
-	if (status != 0) {
-		/* The Ethos-U driver expects the semaphore implementation to never fail except for
-		 * when a timeout occurs, and the current ethosu_semaphore_take implementation makes
-		 * no distinction, in terms of return codes, between a timeout and other semaphore
-		 * take failures. Also, note that a timeout is virtually indistinguishable from
-		 * other failures if the driver logging is disabled. Handling errors other than a
-		 * timeout is therefore not covered here and is deferred to the application
-		 * developer if necessary.
-		 */
-		if (status != -EAGAIN) {
-			LOG_ERR("Failed to take semaphore with error - %d", status);
-		}
-		return -1;
-	}
-
-	return 0;
-}
-
-int ethosu_semaphore_give(void *sem)
-{
-	k_sem_give((struct k_sem *)sem);
-	return 0;
-}
-
-struct ethosu_dts_info {
-	void *base_addr;
-	bool secure_enable;
-	bool privilege_enable;
-	void (*irq_config)(void);
-};
-
-struct ethosu_data {
-	struct ethosu_driver drv;
-};
+LOG_MODULE_REGISTER(arm_ethos_u, CONFIG_ETHOS_U_LOG_LEVEL);
 
 void ethosu_zephyr_irq_handler(const struct device *dev)
 {

drivers/misc/ethos_u/ethos_u_common.c

@@ -0,0 +1,102 @@
+/*
+ * SPDX-FileCopyrightText: <text>Copyright 2021-2022, 2024 Arm Limited and/or its
+ * affiliates <open-source-office@arm.com></text>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "zephyr/sys_clock.h"
+#include <zephyr/device.h>
+#include <zephyr/devicetree.h>
+#include <zephyr/kernel.h>
+#include <zephyr/sys/util.h>
+
+#include <ethosu_driver.h>
+
+#include <zephyr/logging/log.h>
+LOG_MODULE_REGISTER(ethos_u, CONFIG_ETHOS_U_LOG_LEVEL);
+
+/*******************************************************************************
+ * Re-implementation/Overrides __((weak)) symbol functions from ethosu_driver.c
+ * To handle mutex and semaphores
+ *******************************************************************************/
+
+void *ethosu_mutex_create(void)
+{
+	struct k_mutex *mutex;
+
+	mutex = k_malloc(sizeof(*mutex));
+	if (mutex == NULL) {
+		LOG_ERR("Failed allocate mutex");
+		return NULL;
+	}
+
+	k_mutex_init(mutex);
+
+	return (void *)mutex;
+}
+
+int ethosu_mutex_lock(void *mutex)
+{
+	int status;
+
+	status = k_mutex_lock((struct k_mutex *)mutex, K_FOREVER);
+	if (status != 0) {
+		LOG_ERR("Failed to lock mutex with error - %d", status);
+		return -1;
+	}
+
+	return 0;
+}
+
+int ethosu_mutex_unlock(void *mutex)
+{
+	k_mutex_unlock((struct k_mutex *)mutex);
+	return 0;
+}
+
+void *ethosu_semaphore_create(void)
+{
+	struct k_sem *sem;
+
+	sem = k_malloc(sizeof(*sem));
+	if (sem == NULL) {
+		LOG_ERR("Failed to allocate semaphore");
+		return NULL;
+	}
+
+	k_sem_init(sem, 0, 100);
+
+	return (void *)sem;
+}
+
+int ethosu_semaphore_take(void *sem, uint64_t timeout)
+{
+	int status;
+
+	status = k_sem_take((struct k_sem *)sem, (timeout == ETHOSU_SEMAPHORE_WAIT_FOREVER)
+							 ? K_FOREVER
+							 : Z_TIMEOUT_TICKS(timeout));
+
+	if (status != 0) {
+		/* The Ethos-U driver expects the semaphore implementation to never fail except for
+		 * when a timeout occurs, and the current ethosu_semaphore_take implementation makes
+		 * no distinction, in terms of return codes, between a timeout and other semaphore
+		 * take failures. Also, note that a timeout is virtually indistinguishable from
+		 * other failures if the driver logging is disabled. Handling errors other than a
+		 * timeout is therefore not covered here and is deferred to the application
+		 * developer if necessary.
+		 */
+		if (status != -EAGAIN) {
+			LOG_ERR("Failed to take semaphore with error - %d", status);
+		}
+		return -1;
+	}
+
+	return 0;
+}
+
+int ethosu_semaphore_give(void *sem)
+{
+	k_sem_give((struct k_sem *)sem);
+	return 0;
+}

drivers/misc/ethos_u/ethos_u_common.h

@@ -0,0 +1,31 @@
+/*
+ * SPDX-FileCopyrightText: <text>Copyright 2021-2022, 2024 Arm Limited and/or its
+ * affiliates <open-source-office@arm.com></text>
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_DRIVERS_MISC_ETHOS_U_ETHOS_U_COMMON_H_
+#define ZEPHYR_DRIVERS_MISC_ETHOS_U_ETHOS_U_COMMON_H_
+
+#include <ethosu_driver.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct ethosu_dts_info {
+	void *base_addr;
+	bool secure_enable;
+	bool privilege_enable;
+	void (*irq_config)(void);
+};
+
+struct ethosu_data {
+	struct ethosu_driver drv;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ZEPHYR_DRIVERS_MISC_ETHOS_U_ETHOS_U_COMMON_H_ */

samples/modules/tflite-micro/tflm_ethosu/prj.conf

@@ -3,7 +3,7 @@
 CONFIG_CPP=y
 CONFIG_STD_CPP17=y
 CONFIG_TENSORFLOW_LITE_MICRO=y
-CONFIG_ARM_ETHOS_U=y
+CONFIG_ETHOS_U=y
 CONFIG_HEAP_MEM_POOL_SIZE=16384
 CONFIG_LOG=y
 CONFIG_REQUIRES_FLOAT_PRINTF=y