hal/nxp: mcux: flash_c40: add SoC features header and minor cleanups

Introduce fsl_c40_flash_features.h with S32K344 C40 array geometry
(block sizes and counts).

Signed-off-by: Sumit Batra <sumit.batra@nxp.com>

Author: sumitbatra-nxp

mcux/mcux-sdk-ng/drivers/flash_c40/fsl_c40_flash.c

@@ -21,12 +21,20 @@
 #include "fsl_c40_flash.h"
 #include "fsl_common.h"
 #include "fsl_device_registers.h"
+#include "fsl_c40_flash_features.h"
 
 
 /*******************************************************************************
  * Definitions
  ******************************************************************************/
 
+#if !defined(FLASH)  && defined(IP_FLASH)
+#define FLASH  IP_FLASH /* Define a local alias for C40 flash memory */
+#endif
+#if !defined(PFLASH) && defined(IP_PFLASH)
+#define PFLASH IP_PFLASH /* Define a local alias for flash memory controller */
+#endif
+
 /* Component ID definition, used by tools. */
 #ifndef FSL_COMPONENT_ID
 #define FSL_COMPONENT_ID "platform.drivers.flash_c40"
@@ -797,7 +805,7 @@ status_t FLASH_Erase(flash_config_t *config, uint32_t start, uint32_t lengthInBy
 
 status_t FLASH_Program(flash_config_t *config, uint32_t start, uint32_t *src, uint32_t lengthInBytes)
 {
-    status_t ret;
+    status_t ret = kStatus_FLASH_Success;
     size_t chunkSize;
     size_t sizeLeft = lengthInBytes;
     uint8_t *src8 = (uint8_t *) src;
@@ -878,4 +886,4 @@ status_t FLASH_GetSectorProtection(flash_config_t *config, uint32_t address)
     }
 
     return C40_SectorLockStatus(sectorNum);
-}
+}

mcux/mcux-sdk-ng/drivers/flash_c40/fsl_c40_flash_features.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2025 NXP
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef FSL_C40_FLASH_FEATURES_H_
+#define FSL_C40_FLASH_FEATURES_H_
+
+#include "fsl_common.h"
+
+/* Differences in flash array for different S32K3 variants can be added in elif conditions */
+#if defined(CPU_S32K344)
+
+/* Code flash: 4 MiB total => 4 blocks × 1 MiB each */
+#define FSL_FEATURE_FLASH_C40_BLOCK_SIZE_CODE    (1024 * 1024)
+#define FSL_FEATURE_FLASH_C40_BLOCK_COUNT_CODE   (4)
+/* Data flash: 256 KiB */
+#define FSL_FEATURE_FLASH_C40_BLOCK_SIZE_DATA    (256 * 1024)
+#else
+#error "C40 feature macros not defined for this SoC."
+
+#endif
+
+#endif /* FSL_C40_FLASH_FEATURES_H_ */