drivers: Move flexram to misc driver

Flexram is really not a memory controller, and does not belong in memc
namespace or directory. Move it to it's own misc directory and remove
memc_ from the namespace.

Signed-off-by: Declan Snyder <[email protected]>

Author: decsny

doc/releases/migration-guide-4.2.rst

@@ -236,6 +236,8 @@ Misc
   file can be included using ``<zephyr/drivers/misc/flexram/nxp_flexram.h>``.
   Modification to CMakeList.txt to use include this driver is no longer
   required.
+* All memc_flexram_* namespaced things including kconfigs and C API
+  have been changed to just flexram_*.
 
 Bluetooth
 *********

drivers/memc/CMakeLists.txt

@@ -15,7 +15,6 @@ zephyr_library_sources_ifdef(CONFIG_MEMC_MCUX_FLEXSPI_S27KS0641 memc_mcux_flexsp
 zephyr_library_sources_ifdef(CONFIG_MEMC_MCUX_FLEXSPI_APS6408L memc_mcux_flexspi_aps6408l.c)
 zephyr_library_sources_ifdef(CONFIG_MEMC_MCUX_FLEXSPI_APS6404L memc_mcux_flexspi_aps6404l.c)
 zephyr_library_sources_ifdef(CONFIG_MEMC_MCUX_FLEXSPI_IS66WVQ8M4 memc_mcux_flexspi_is66wvq8m4.c)
-zephyr_library_sources_ifdef(CONFIG_MEMC_NXP_FLEXRAM memc_nxp_flexram.c)
 zephyr_library_sources_ifdef(CONFIG_MEMC_RENESAS_RA_SDRAM memc_renesas_ra_sdram.c)
 
 zephyr_library_sources_ifdef(CONFIG_MEMC_SAM_SMC memc_sam_smc.c)

drivers/memc/Kconfig.mcux

@@ -66,22 +66,3 @@ choice MEMC_LOG_LEVEL_CHOICE
 endchoice
 
 endif # DT_HAS_NXP_IMX_FLEXSPI_ENABLED
-
-
-if DT_HAS_NXP_FLEXRAM_ENABLED
-
-config MEMC_NXP_FLEXRAM
-	bool
-	default y
-
-config MEMC_NXP_FLEXRAM_MAGIC_ADDR_API
-	bool "NXP FlexRAM magic addr API"
-	help
-	  Enable API to use flexRAM magic address functionality
-
-config MEMC_NXP_FLEXRAM_ERROR_INTERRUPT
-	bool "NXP FlexRAM error interrupt"
-	help
-	  Allow flexram to generate error interrupts
-
-endif # DT_HAS_NXP_FLEXRAM_ENABLED

drivers/misc/CMakeLists.txt

@@ -4,6 +4,7 @@ add_subdirectory_ifdef(CONFIG_ARM_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)
+add_subdirectory_ifdef(CONFIG_NXP_FLEXRAM nxp_flexram)
 add_subdirectory_ifdef(CONFIG_NXP_S32_EMIOS nxp_s32_emios)
 add_subdirectory_ifdef(CONFIG_TIMEAWARE_GPIO timeaware_gpio)
 add_subdirectory_ifdef(CONFIG_DEVMUX devmux)

drivers/misc/Kconfig

@@ -8,6 +8,7 @@ menu "Miscellaneous Drivers"
 source "drivers/misc/ft8xx/Kconfig"
 source "drivers/misc/grove_lcd_rgb/Kconfig"
 source "drivers/misc/pio_rpi_pico/Kconfig"
+source "drivers/misc/nxp_flexram/Kconfig"
 source "drivers/misc/nxp_s32_emios/Kconfig"
 source "drivers/misc/timeaware_gpio/Kconfig"
 source "drivers/misc/devmux/Kconfig"

drivers/misc/nxp_flexram/CMakeLists.txt

@@ -0,0 +1,8 @@
+# Copyright 2025 NXP
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_library()
+
+zephyr_library_sources(
+  nxp_flexram.c
+)

drivers/misc/nxp_flexram/Kconfig

@@ -0,0 +1,24 @@
+# Copyright (c) 2021 Basalte bv
+# Copyright (c) 2023, ithinx GmbH
+# Copyright (c) 2023, Tonies GmbH
+# Copyright 2020-2023, 2025 NXP
+# SPDX-License-Identifier: Apache-2.0
+
+config NXP_FLEXRAM
+	bool
+	default y if DT_HAS_NXP_FLEXRAM_ENABLED
+
+if NXP_FLEXRAM
+
+config NXP_FLEXRAM_MAGIC_ADDR_API
+	bool "NXP FlexRAM magic addr API"
+	depends on SOC_SERIES_IMXRT11XX
+	help
+	  Enable API to use flexRAM magic address functionality
+
+config NXP_FLEXRAM_ERROR_INTERRUPT
+	bool "NXP FlexRAM error interrupt"
+	help
+	  Allow flexram to generate error interrupts
+
+endif # NXP_FLEXRAM

drivers/memc/memc_nxp_flexram.c renamed to drivers/misc/nxp_flexram/nxp_flexram.c

@@ -15,7 +15,7 @@
 #include "fsl_device_registers.h"
 
 
-#if defined(CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API)
+#if defined(CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API)
 BUILD_ASSERT(DT_PROP(FLEXRAM_DT_NODE, flexram_has_magic_addr),
 		"SOC does not support magic flexram addresses");
 #endif
@@ -92,7 +92,7 @@ static FLEXRAM_Type *const base = (FLEXRAM_Type *) DT_REG_ADDR(FLEXRAM_DT_NODE);
 static flexram_callback_t flexram_callback;
 static void *flexram_user_data;
 
-void memc_flexram_register_callback(flexram_callback_t callback, void *user_data)
+void flexram_register_callback(flexram_callback_t callback, void *user_data)
 {
 	flexram_callback = callback;
 	flexram_user_data = user_data;
@@ -106,7 +106,7 @@ static void nxp_flexram_isr(void *arg)
 		return;
 	}
 
-#if defined(CONFIG_MEMC_NXP_FLEXRAM_ERROR_INTERRUPT)
+#if defined(CONFIG_NXP_FLEXRAM_ERROR_INTERRUPT)
 	if (base->INT_STATUS & FLEXRAM_INT_STATUS_OCRAM_ERR_STATUS_MASK) {
 		base->INT_STATUS |= FLEXRAM_INT_STATUS_OCRAM_ERR_STATUS_MASK;
 		flexram_callback(flexram_ocram_access_error, flexram_user_data);
@@ -119,9 +119,9 @@ static void nxp_flexram_isr(void *arg)
 		base->INT_STATUS |= FLEXRAM_INT_STATUS_ITCM_ERR_STATUS_MASK;
 		flexram_callback(flexram_itcm_access_error, flexram_user_data);
 	}
-#endif /* CONFIG_MEMC_NXP_FLEXRAM_ERROR_INTERRUPT */
+#endif /* CONFIG_NXP_FLEXRAM_ERROR_INTERRUPT */
 
-#if defined(CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API)
+#if defined(CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API)
 	if (base->INT_STATUS & FLEXRAM_INT_STATUS_OCRAM_MAM_STATUS_MASK) {
 		base->INT_STATUS |= FLEXRAM_INT_STATUS_OCRAM_MAM_STATUS_MASK;
 		flexram_callback(flexram_ocram_magic_addr, flexram_user_data);
@@ -134,11 +134,11 @@ static void nxp_flexram_isr(void *arg)
 		base->INT_STATUS |= FLEXRAM_INT_STATUS_ITCM_MAM_STATUS_MASK;
 		flexram_callback(flexram_itcm_magic_addr, flexram_user_data);
 	}
-#endif /* CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API */
+#endif /* CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API */
 }
 
-#if defined(CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API)
-int memc_flexram_set_ocram_magic_addr(uint32_t ocram_addr)
+#if defined(CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API)
+int flexram_set_ocram_magic_addr(uint32_t ocram_addr)
 {
 #ifdef OCRAM_DT_NODE
 	ocram_addr -= DT_REG_ADDR(OCRAM_DT_NODE);
@@ -156,7 +156,7 @@ int memc_flexram_set_ocram_magic_addr(uint32_t ocram_addr)
 #endif
 }
 
-int memc_flexram_set_itcm_magic_addr(uint32_t itcm_addr)
+int flexram_set_itcm_magic_addr(uint32_t itcm_addr)
 {
 #ifdef ITCM_DT_NODE
 	itcm_addr -= DT_REG_ADDR(ITCM_DT_NODE);
@@ -174,7 +174,7 @@ int memc_flexram_set_itcm_magic_addr(uint32_t itcm_addr)
 #endif
 }
 
-int memc_flexram_set_dtcm_magic_addr(uint32_t dtcm_addr)
+int flexram_set_dtcm_magic_addr(uint32_t dtcm_addr)
 {
 #ifdef DTCM_DT_NODE
 	dtcm_addr -= DT_REG_ADDR(DTCM_DT_NODE);
@@ -191,7 +191,7 @@ int memc_flexram_set_dtcm_magic_addr(uint32_t dtcm_addr)
 	return -ENODEV;
 #endif
 }
-#endif /* CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API */
+#endif /* CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API */
 
 #endif /* FLEXRAM_INTERRUPTS_USED */
 
@@ -204,20 +204,20 @@ static int nxp_flexram_init(void)
 		base->TCM_CTRL |= FLEXRAM_TCM_CTRL_TCM_RWAIT_EN_MASK;
 	}
 
-#if defined(CONFIG_MEMC_NXP_FLEXRAM_ERROR_INTERRUPT)
+#if defined(CONFIG_NXP_FLEXRAM_ERROR_INTERRUPT)
 	base->INT_SIG_EN |= FLEXRAM_INT_SIG_EN_OCRAM_ERR_SIG_EN_MASK;
 	base->INT_SIG_EN |= FLEXRAM_INT_SIG_EN_DTCM_ERR_SIG_EN_MASK;
 	base->INT_SIG_EN |= FLEXRAM_INT_SIG_EN_ITCM_ERR_SIG_EN_MASK;
 	base->INT_STAT_EN |= FLEXRAM_INT_STAT_EN_OCRAM_ERR_STAT_EN_MASK;
 	base->INT_STAT_EN |= FLEXRAM_INT_STAT_EN_DTCM_ERR_STAT_EN_MASK;
 	base->INT_STAT_EN |= FLEXRAM_INT_STAT_EN_ITCM_ERR_STAT_EN_MASK;
-#endif /* CONFIG_MEMC_NXP_FLEXRAM_ERROR_INTERRUPT */
+#endif /* CONFIG_NXP_FLEXRAM_ERROR_INTERRUPT */
 
-#if defined(CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API)
+#if defined(CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API)
 	base->INT_SIG_EN |= FLEXRAM_INT_SIG_EN_OCRAM_MAM_SIG_EN_MASK;
 	base->INT_SIG_EN |= FLEXRAM_INT_SIG_EN_DTCM_MAM_SIG_EN_MASK;
 	base->INT_SIG_EN |= FLEXRAM_INT_SIG_EN_ITCM_MAM_SIG_EN_MASK;
-#endif /* CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API */
+#endif /* CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API */
 
 #ifdef FLEXRAM_INTERRUPTS_USED
 	IRQ_CONNECT(DT_IRQN(FLEXRAM_DT_NODE), DT_IRQ(FLEXRAM_DT_NODE, priority),

include/zephyr/drivers/misc/flexram/nxp_flexram.h

@@ -10,8 +10,8 @@
 #define FLEXRAM_DT_NODE    DT_INST(0, nxp_flexram)
 #define IOMUXC_GPR_DT_NODE DT_NODELABEL(iomuxcgpr)
 
-#if defined(CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API) || \
-	defined(CONFIG_MEMC_NXP_FLEXRAM_ERROR_INTERRUPT)
+#if defined(CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API) || \
+	defined(CONFIG_NXP_FLEXRAM_ERROR_INTERRUPT)
 #define FLEXRAM_INTERRUPTS_USED
 #endif
 
@@ -20,22 +20,22 @@
 #endif
 
 #ifdef FLEXRAM_INTERRUPTS_USED
-enum memc_flexram_interrupt_cause {
-#ifdef CONFIG_MEMC_NXP_FLEXRAM_ERROR_INTERRUPT
+enum flexram_interrupt_cause {
+#ifdef CONFIG_NXP_FLEXRAM_ERROR_INTERRUPT
 	flexram_ocram_access_error,
 	flexram_itcm_access_error,
 	flexram_dtcm_access_error,
 #endif
-#ifdef CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API
+#ifdef CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API
 	flexram_ocram_magic_addr,
 	flexram_itcm_magic_addr,
 	flexram_dtcm_magic_addr,
-#endif /* CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API */
+#endif /* CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API */
 };
 
-typedef void (*flexram_callback_t)(enum memc_flexram_interrupt_cause, void *user_data);
+typedef void (*flexram_callback_t)(enum flexram_interrupt_cause, void *user_data);
 
-void memc_flexram_register_callback(flexram_callback_t callback, void *user_data);
+void flexram_register_callback(flexram_callback_t callback, void *user_data);
 #endif /* FLEXRAM_INTERRUPTS_USED */
 
 #ifdef FLEXRAM_RUNTIME_BANKS_USED
@@ -46,7 +46,7 @@ void memc_flexram_register_callback(flexram_callback_t callback, void *user_data
  */
 #define GPR_FLEXRAM_REG_FILL(node_id, prop, idx) \
 	(((uint32_t)DT_PROP_BY_IDX(node_id, prop, idx)) << (2 * idx))
-static inline void memc_flexram_dt_partition(void)
+static inline void flexram_dt_partition(void)
 {
 	/* iomuxc_gpr must be const (in ROM region) because used in reconfiguring ram */
 	static IOMUXC_GPR_Type *const iomuxc_gpr =
@@ -65,7 +65,7 @@ static inline void memc_flexram_dt_partition(void)
 }
 #endif /* FLEXRAM_RUNTIME_BANKS_USED */
 
-#ifdef CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API
+#ifdef CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API
 /** @brief Sets magic address for OCRAM
  *
  * Magic address allows core interrupt from FlexRAM when address
@@ -76,7 +76,7 @@ static inline void memc_flexram_dt_partition(void)
  * @retval -EINVAL if ocram_addr is not in OCRAM
  * @retval -ENODEV if there is no OCRAM allocation in flexram
  */
-int memc_flexram_set_ocram_magic_addr(uint32_t ocram_addr);
+int flexram_set_ocram_magic_addr(uint32_t ocram_addr);
 
 /** @brief Sets magic address for ITCM
  *
@@ -88,7 +88,7 @@ int memc_flexram_set_ocram_magic_addr(uint32_t ocram_addr);
  * @retval -EINVAL if itcm_addr is not in ITCM
  * @retval -ENODEV if there is no ITCM allocation in flexram
  */
-int memc_flexram_set_itcm_magic_addr(uint32_t itcm_addr);
+int flexram_set_itcm_magic_addr(uint32_t itcm_addr);
 
 /** @brief Sets magic address for DTCM
  *
@@ -100,6 +100,6 @@ int memc_flexram_set_itcm_magic_addr(uint32_t itcm_addr);
  * @retval -EINVAL if dtcm_addr is not in DTCM
  * @retval -ENODEV if there is no DTCM allocation in flexram
  */
-int memc_flexram_set_dtcm_magic_addr(uint32_t dtcm_addr);
+int flexram_set_dtcm_magic_addr(uint32_t dtcm_addr);
 
-#endif /* CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API */
+#endif /* CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API */

samples/boards/nxp/mimxrt1170_evk_cm7/magic_addr/prj.conf

@@ -1,3 +1,3 @@
-CONFIG_MEMC_NXP_FLEXRAM_MAGIC_ADDR_API=y
+CONFIG_NXP_FLEXRAM_MAGIC_ADDR_API=y
 CONFIG_CONSOLE_SUBSYS=y
 CONFIG_CONSOLE_GETCHAR=y

samples/boards/nxp/mimxrt1170_evk_cm7/magic_addr/src/main.c

@@ -16,7 +16,7 @@ K_SEM_DEFINE(dtcm_magic, 0, 1);
 __dtcm_bss_section uint8_t var;
 int cnt;
 
-void flexram_magic_addr_isr_cb(enum memc_flexram_interrupt_cause cause,
+void flexram_magic_addr_isr_cb(enum flexram_interrupt_cause cause,
 						void *data)
 {
 	ARG_UNUSED(data);
@@ -29,7 +29,7 @@ void flexram_magic_addr_isr_cb(enum memc_flexram_interrupt_cause cause,
 
 int main(void)
 {
-	memc_flexram_register_callback(flexram_magic_addr_isr_cb, NULL);
+	flexram_register_callback(flexram_magic_addr_isr_cb, NULL);
 
 	console_init();
 
@@ -38,7 +38,7 @@ int main(void)
 
 	uint32_t dtcm_addr = (uint32_t)&var;
 
-	memc_flexram_set_dtcm_magic_addr(dtcm_addr);
+	flexram_set_dtcm_magic_addr(dtcm_addr);
 
 	uint8_t tmp;