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Posted to commits@nuttx.apache.org by ac...@apache.org on 2020/06/16 18:35:53 UTC

[incubator-nuttx] 02/05: S32K1XX Enhanced EEPROM block device driver

This is an automated email from the ASF dual-hosted git repository.

acassis pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git

commit efbe4c89e2522fce7dbf1bf6d048da117676e743
Author: Peter van der Perk <pe...@nxp.com>
AuthorDate: Thu Jun 4 11:24:20 2020 +0200

    S32K1XX Enhanced EEPROM block device driver
---
 arch/arm/src/s32k1xx/Kconfig                 |   7 +
 arch/arm/src/s32k1xx/Make.defs               |   4 +
 arch/arm/src/s32k1xx/hardware/s32k1xx_ftfc.h |   2 +
 arch/arm/src/s32k1xx/s32k1xx_eeeprom.c       | 486 +++++++++++++++++++++++++++
 arch/arm/src/s32k1xx/s32k1xx_eeeprom.h       |  89 +++++
 arch/arm/src/s32k1xx/s32k1xx_start.c         |   4 +
 6 files changed, 592 insertions(+)

diff --git a/arch/arm/src/s32k1xx/Kconfig b/arch/arm/src/s32k1xx/Kconfig
index e3ef9bd..ca29c75 100644
--- a/arch/arm/src/s32k1xx/Kconfig
+++ b/arch/arm/src/s32k1xx/Kconfig
@@ -255,6 +255,13 @@ config S32K1XX_PROGMEM
         Use the FlexNVM 32/64 KB of d-flash memory as a
 		Memory-Technology-Device (MTD).
 
+config S32K1XX_EEEPROM
+	bool "Emulated EEPROM"
+	default n
+    ---help---
+       Enables Emulated EEPROM function which uses the FlexRAM and FlexNVM
+       memory to emulate non-volatile memory. The EEEPROM wil be registered 
+       as a ramdisk block device
 
 endmenu # S32K1XX Peripheral Selection
 
diff --git a/arch/arm/src/s32k1xx/Make.defs b/arch/arm/src/s32k1xx/Make.defs
index 05ac9dd..3928f30 100644
--- a/arch/arm/src/s32k1xx/Make.defs
+++ b/arch/arm/src/s32k1xx/Make.defs
@@ -99,6 +99,10 @@ ifeq ($(CONFIG_S32K1XX_PROGMEM),y)
 CHIP_CSRCS += s32k1xx_progmem.c
 endif
 
+ifeq ($(CONFIG_S32K1XX_EEEPROM),y)
+CHIP_CSRCS += s32k1xx_eeeprom.c
+endif 
+
 # Source files specific to the ARM CPU family and to the S32K1xx chip family
 
 ifeq ($(CONFIG_ARCH_CHIP_S32K11X),y)
diff --git a/arch/arm/src/s32k1xx/hardware/s32k1xx_ftfc.h b/arch/arm/src/s32k1xx/hardware/s32k1xx_ftfc.h
index 59f576a..891aefb 100644
--- a/arch/arm/src/s32k1xx/hardware/s32k1xx_ftfc.h
+++ b/arch/arm/src/s32k1xx/hardware/s32k1xx_ftfc.h
@@ -140,4 +140,6 @@
 #define S32K1XX_FTFC_PROGRAM_PARTITION                   0x80 /* PGMPART */
 #define S32K1XX_FTFC_SET_FLEXRAM_FUNCTION                0x81 /* SETRAM */
 
+#define S32K1XX_FTFC_EEEPROM_BASE                        0x14000000
+
 #endif /* __ARCH_ARM_SRC_S32K1XX_HARDWARE_S32K1XX_FTFC_H */
diff --git a/arch/arm/src/s32k1xx/s32k1xx_eeeprom.c b/arch/arm/src/s32k1xx/s32k1xx_eeeprom.c
new file mode 100644
index 0000000..f5eb153
--- /dev/null
+++ b/arch/arm/src/s32k1xx/s32k1xx_eeeprom.c
@@ -0,0 +1,486 @@
+/******************************************************************************
+ * arch/arm/src/s32k1xx/s32k1xx_eeeprom.c
+ *
+ *   Copyright (C) 2019 Gregory Nutt. All rights reserved.
+ *   Author:  Gregory Nutt <gn...@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************/
+
+/******************************************************************************
+ * Included Files
+ ******************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <assert.h>
+#include <errno.h>
+
+#include "up_arch.h"
+
+#include "hardware/s32k1xx_ftfc.h"
+#include "hardware/s32k1xx_sim.h"
+
+#include "s32k1xx_config.h"
+#include "s32k1xx_eeeprom.h"
+
+#include "up_internal.h"
+
+#include <arch/board/board.h> /* Include last:  has dependencies */
+
+#include <nuttx/kmalloc.h>
+#include <nuttx/fs/fs.h>
+
+
+/******************************************************************************
+ * Pre-processor Definitions
+ ******************************************************************************/
+
+
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+struct eeed_struct_s
+{
+  uint32_t eeed_nsectors;         /* Number of sectors on device */
+  uint16_t eeed_sectsize;         /* The size of one sector */
+#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
+  uint8_t eeed_crefs;             /* Open reference count */
+#endif
+  FAR uint8_t *eeed_buffer;       /* FlexRAM memory */
+};
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
+static int     eeed_open(FAR struct inode *inode);
+static int     eeed_close(FAR struct inode *inode);
+#endif
+
+static ssize_t eeed_read(FAR struct inode *inode, FAR unsigned char *buffer,
+                 size_t start_sector, unsigned int nsectors);
+static ssize_t eeed_write(FAR struct inode *inode,
+                 FAR const unsigned char *buffer, size_t start_sector,
+                 unsigned int nsectors);
+
+static int     eeed_geometry(FAR struct inode *inode,
+                 FAR struct geometry *geometry);
+static int     eeed_ioctl(FAR struct inode *inode, int cmd,
+                 unsigned long arg);
+
+#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
+static int     eeed_unlink(FAR struct inode *inode);
+#endif
+
+/******************************************************************************
+ * Private Data
+ ******************************************************************************/
+
+static const struct block_operations g_bops =
+{
+#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
+  eeed_open,     /* open     */
+  eeed_close,    /* close    */
+#else
+  0,           /* open     */
+  0,           /* close    */
+#endif
+  eeed_read,     /* read     */
+  eeed_write,    /* write    */
+  eeed_geometry, /* geometry */
+  eeed_ioctl,    /* ioctl    */
+#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
+  eeed_unlink    /* unlink   */
+#endif
+};
+
+
+/******************************************************************************
+ * Private Functions
+ ******************************************************************************/
+
+
+static inline void wait_ftfc_ready()
+{
+  while ((getreg8(S32K1XX_FTFC_FSTAT) & FTTC_FSTAT_CCIF) == 0)
+    {
+      /* Busy */
+    }
+}
+
+static uint32_t execute_ftfc_command()
+{
+  uint8_t regval;
+  uint32_t retval = 0;
+
+  /* Clear CCIF to launch command */
+
+  regval = getreg8(S32K1XX_FTFC_FSTAT);
+  regval |= FTTC_FSTAT_CCIF;
+  putreg8(regval, S32K1XX_FTFC_FSTAT);
+
+  wait_ftfc_ready();
+
+  retval = getreg8(S32K1XX_FTFC_FSTAT);
+
+  if (retval & (FTTC_FSTAT_MGSTAT0 | FTTC_FSTAT_FPVIOL |
+                FTTC_FSTAT_ACCERR | FTTC_FSTAT_RDCOLERR))
+    {
+      return retval; /* Error has occured */
+    }
+
+  return retval;
+}
+
+
+/****************************************************************************
+ * Name: eeed_open
+ *
+ * Description: Open the block device
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
+static int eeed_open(FAR struct inode *inode)
+{
+  FAR struct eeed_struct_s *dev;
+
+  DEBUGASSERT(inode && inode->i_private);
+  dev = (FAR struct eeed_struct_s *)inode->i_private;
+
+  /* Increment the open reference count */
+
+  dev->eeed_crefs++;
+  DEBUGASSERT(dev->eeed_crefs > 0);
+
+  finfo("eeed_crefs: %d\n", dev->eeed_crefs);
+  return OK;
+}
+#endif
+
+/****************************************************************************
+ * Name: eeed_close
+ *
+ * Description: close the block device
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
+static int eeed_close(FAR struct inode *inode)
+{
+  FAR struct eeed_struct_s *dev;
+
+  DEBUGASSERT(inode && inode->i_private);
+  dev = (FAR struct eeed_struct_s *)inode->i_private;
+
+  /* Increment the open reference count */
+
+  DEBUGASSERT(dev->eeed_crefs > 0);
+  dev->eeed_crefs--;
+  finfo("eeed_crefs: %d\n", dev->eeed_crefs);
+
+  return OK;
+}
+#endif
+
+/****************************************************************************
+ * Name: eeed_read
+ *
+ * Description:  Read the specified number of sectors
+ *
+ ****************************************************************************/
+
+static ssize_t eeed_read(FAR struct inode *inode, unsigned char *buffer,
+                       size_t start_sector, unsigned int nsectors)
+{
+  FAR struct eeed_struct_s *dev;
+
+  DEBUGASSERT(inode && inode->i_private);
+  dev = (FAR struct eeed_struct_s *)inode->i_private;
+
+  finfo("sector: %d nsectors: %d sectorsize: %d\n",
+        start_sector, dev->eeed_sectsize, nsectors);
+
+  if (start_sector < dev->eeed_nsectors &&
+      start_sector + nsectors <= dev->eeed_nsectors)
+    {
+       finfo("Transfer %d bytes from %p\n",
+             nsectors * dev->eeed_sectsize,
+             &dev->eeed_buffer[start_sector * dev->eeed_sectsize]);
+
+       wait_ftfc_ready();
+       
+       memcpy(buffer,
+             &dev->eeed_buffer[start_sector * dev->eeed_sectsize],
+             nsectors * dev->eeed_sectsize);
+      return nsectors;
+    }
+
+  return -EINVAL;
+}
+
+/****************************************************************************
+ * Name: eeed_write
+ *
+ * Description: Write the specified number of sectors
+ *
+ ****************************************************************************/
+
+static ssize_t eeed_write(FAR struct inode *inode, const unsigned char *buffer,
+                        size_t start_sector, unsigned int nsectors)
+{
+  struct eeed_struct_s *dev;
+
+  DEBUGASSERT(inode && inode->i_private);
+  dev = (struct eeed_struct_s *)inode->i_private;
+
+  finfo("sector: %d nsectors: %d sectorsize: %d\n",
+        start_sector, dev->eeed_sectsize, nsectors);
+
+  if (start_sector < dev->eeed_nsectors &&
+           start_sector + nsectors <= dev->eeed_nsectors)
+    {
+      finfo("Transfer %d bytes to %p\n",
+             nsectors * dev->eeed_sectsize,
+             &dev->eeed_buffer[start_sector * dev->eeed_sectsize]);
+
+      FAR uint32_t *dest = (FAR uint32_t*)&dev->eeed_buffer
+                           [start_sector * dev->eeed_sectsize];
+      uint32_t *src = (uint32_t*)buffer;
+      
+      for(int i = 0; i < nsectors; i++){
+        wait_ftfc_ready();
+        *dest = *src;
+        dest++;
+        src++;
+      }
+      return nsectors;
+    }
+
+  return -EFBIG;
+}
+
+/****************************************************************************
+ * Name: eeed_geometry
+ *
+ * Description: Return device geometry
+ *
+ ****************************************************************************/
+
+static int eeed_geometry(FAR struct inode *inode, struct geometry *geometry)
+{
+  struct eeed_struct_s *dev;
+
+  finfo("Entry\n");
+
+  DEBUGASSERT(inode);
+  if (geometry)
+    {
+      dev = (struct eeed_struct_s *)inode->i_private;
+      geometry->geo_available     = true;
+      geometry->geo_mediachanged  = false;
+      geometry->geo_writeenabled  = true;
+      geometry->geo_nsectors      = dev->eeed_nsectors;
+      geometry->geo_sectorsize    = dev->eeed_sectsize;
+
+      finfo("available: true mediachanged: false writeenabled: %s\n",
+            geometry->geo_writeenabled ? "true" : "false");
+      finfo("nsectors: %d sectorsize: %d\n",
+            geometry->geo_nsectors, geometry->geo_sectorsize);
+
+      return OK;
+    }
+
+  return -EINVAL;
+}
+
+/****************************************************************************
+ * Name: eeed_ioctl
+ *
+ * Description:
+ *   Return device geometry
+ *
+ ****************************************************************************/
+
+static int eeed_ioctl(FAR struct inode *inode, int cmd, unsigned long arg)
+{
+  FAR struct eeed_struct_s *dev;
+  FAR void **ppv = (void**)((uintptr_t)arg);
+
+  finfo("Entry\n");
+
+  /* Only one ioctl command is supported */
+
+  DEBUGASSERT(inode && inode->i_private);
+  if (cmd == BIOC_XIPBASE && ppv)
+    {
+      dev  = (FAR struct eeed_struct_s *)inode->i_private;
+      *ppv = (FAR void *)dev->eeed_buffer;
+
+      finfo("ppv: %p\n", *ppv);
+      return OK;
+    }
+
+  return -ENOTTY;
+}
+
+/****************************************************************************
+ * Name: eeed_unlink
+ *
+ * Description:
+ *   The block driver has been unlinked.
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
+static int eeed_unlink(FAR struct inode *inode)
+{
+  FAR struct eeed_struct_s *dev;
+
+  DEBUGASSERT(inode && inode->i_private);
+  dev = (FAR struct eeed_struct_s *)inode->i_private;
+
+
+  /* And free the block driver itself */
+
+  kmm_free(dev);
+
+  return OK;
+}
+#endif
+
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: s32k1xx_eeeprom_register
+ *
+ * Description:
+ *   Non-standard function to register a eeeprom
+ *
+ * Input Parameters:
+ *   minor:         Selects suffix of device named /dev/eeepromN, N={1,2,3...}
+ *   size:          The size of eeprom in bytes
+ *
+ * Returned Value:
+ *   Zero on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+int s32k1xx_eeeprom_register(int minor, uint32_t size)
+{
+  struct eeed_struct_s *dev;
+  char devname[16];
+  int ret = -ENOMEM;
+
+  /* Allocate a eeeprom device structure */
+
+  dev = (struct eeed_struct_s *)kmm_zalloc(sizeof(struct eeed_struct_s));
+  if (dev)
+    {
+      /* Initialize the eeeprom device structure */
+
+      dev->eeed_nsectors     = size / 4;     /* Number of sectors on device */
+      dev->eeed_sectsize     = 4;            /* The size of one sector */
+      dev->eeed_buffer       = (FAR uint8_t *)S32K1XX_FTFC_EEEPROM_BASE;  
+                                             /* FlexRAM buffer location */
+      /* Create a eeeprom device name */
+
+      snprintf(devname, 16, "/dev/eeeprom%d", minor);
+
+      /* Inode private data is a reference to the eeeprom device structure */
+
+      ret = register_blockdriver(devname, &g_bops, 0, dev);
+      if (ret < 0)
+        {
+          ferr("register_blockdriver failed: %d\n", -ret);
+          kmm_free(dev);
+        }
+    }
+
+  return ret;
+}
+
+/****************************************************************************
+ * Name: s32k1xx_eeeprom_init
+ *
+ * Description:
+ *   Init FTFC flash controller to run in Enhanced EEPROM mode
+ *
+ *
+ ****************************************************************************/
+
+void s32k1xx_eeeprom_init()
+{
+  uint32_t regval;
+  
+  regval = getreg32(S32K1XX_SIM_FCFG1);
+  
+  /* If the FlexNVM memory has not been partitioned */ 
+  if(((regval & SIM_FCFG1_DEPART_MASK) >> SIM_FCFG1_DEPART_SHIFT) == 0xF)
+    {    
+      /* Setup D-flash partitioning for use with EEEPROM */
+
+      putreg8(S32K1XX_FTFC_PROGRAM_PARTITION, S32K1XX_FTFC_FCCOB0); /* Command */
+
+      putreg8(0x0, S32K1XX_FTFC_FCCOB1); /* CSEc key size */
+      putreg8(0x0, S32K1XX_FTFC_FCCOB2); /* uSFE */
+      putreg8(0x0, S32K1XX_FTFC_FCCOB3); /* Load FlexRAM EEE */
+      putreg8(0x2, S32K1XX_FTFC_FCCOB4); /* EEE Partition code (4KB) */
+      putreg8(0x8, S32K1XX_FTFC_FCCOB5); /* DE  Partition code (64KB FlexNVM as 
+                                                                EEEPROM backup */
+
+      execute_ftfc_command();
+    }
+
+  /* Enable FlexRAM for use with EEPROM */
+
+  putreg8(S32K1XX_FTFC_SET_FLEXRAM_FUNCTION, S32K1XX_FTFC_FCCOB0); /* Command */
+
+  putreg8(0x0, S32K1XX_FTFC_FCCOB1); /* FlexRAM used for EEEPROM */
+
+  execute_ftfc_command();
+  
+  /* Wait for Emulated EEPROM to be ready */
+  while ((getreg8(S32K1XX_FTFC_FCNFG) & FTTC_FCNFG_EEERDY) == 0)
+  {
+    /* Busy */
+  }
+  
+}
diff --git a/arch/arm/src/s32k1xx/s32k1xx_eeeprom.h b/arch/arm/src/s32k1xx/s32k1xx_eeeprom.h
new file mode 100644
index 0000000..6ff81de
--- /dev/null
+++ b/arch/arm/src/s32k1xx/s32k1xx_eeeprom.h
@@ -0,0 +1,89 @@
+/******************************************************************************
+ * arch/arm/src/s32k1xx/s32k1xx_eeeprom.h
+ *
+ *   Copyright (C) 2019 Gregory Nutt. All rights reserved.
+ *   Author:  Gregory Nutt <gn...@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************/
+
+#ifndef __ARCH_ARM_SRC_S32K1XX_EEEPROM_H
+#define __ARCH_ARM_SRC_S32K1XX_EEEPROM_H
+
+/******************************************************************************
+ * Included Files
+ ******************************************************************************/
+
+#include <nuttx/config.h>
+#include <nuttx/compiler.h>
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "up_internal.h"
+#include "s32k1xx_config.h"
+
+/******************************************************************************
+ * Pre-processor Definitions
+ ******************************************************************************/
+
+
+/******************************************************************************
+ * Public Function Prototypes
+ ******************************************************************************/
+
+/****************************************************************************
+ * Name: s32k1xx_eeeprom_init
+ *
+ * Description:
+ *   Init FTFC flash controller to run in Enhanced EEPROM mode
+ *
+ *
+ ****************************************************************************/
+
+void s32k1xx_eeeprom_init(void);
+
+/****************************************************************************
+ * Name: s32k1xx_eeeprom_register
+ *
+ * Description:
+ *   Non-standard function to register a eeeprom
+ *
+ * Input Parameters:
+ *   minor:         Selects suffix of device named /dev/eeepromN, N={1,2,3...}
+ *   size:          The size of eeprom in bytes
+ *
+ * Returned Value:
+ *   Zero on success; a negated errno value on failure.
+ *
+ ****************************************************************************/
+
+int s32k1xx_eeeprom_register(int minor, uint32_t size);
+#endif /* __ARCH_ARM_SRC_S32K1XX_EEEPROM_H */
diff --git a/arch/arm/src/s32k1xx/s32k1xx_start.c b/arch/arm/src/s32k1xx/s32k1xx_start.c
index 430d52d..3ad3620 100644
--- a/arch/arm/src/s32k1xx/s32k1xx_start.c
+++ b/arch/arm/src/s32k1xx/s32k1xx_start.c
@@ -361,6 +361,10 @@ void __start(void)
   s32k1xx_progmem_init();
 #endif
 
+#ifdef CONFIG_S32K1XX_EEEPROM
+  s32k1xx_eeeprom_init();
+#endif
+
   /* For the case of the separate user-/kernel-space build, perform whatever
    * platform specific initialization of the user memory is required.
    * Normally this just means initializing the user space .data and .bss