espressif: mcuboot: get MCUBOOT_BOOT_MAX_ALIGN value from DT

This change affects only MCUboot Zephyr Port for ESP chips or Zephyr
application with MCUboot compatibilty (which builds the bootutil lib).
In these cases, MCUBOOT_BOOT_MAX_ALIGN value must be taken from DT
flash write-block-size if its greater than 8.

Signed-off-by: Almir Okato <[email protected]>

Author: almir-okato

zephyr/port/include/boot/mcuboot_config/mcuboot_config.h

@@ -7,6 +7,8 @@
 #ifndef __MCUBOOT_CONFIG_H__
 #define __MCUBOOT_CONFIG_H__
 
+#include <zephyr/devicetree.h>
+
 /*
  * Signature types
  *
@@ -29,8 +31,13 @@
 #define MCUBOOT_SIGN_ED25519
 #endif
 
-#if defined(CONFIG_SECURE_FLASH_ENC_ENABLED)
-#define MCUBOOT_BOOT_MAX_ALIGN 32
+/* This mcuboot_config.h is used only by Zephyr builds, such as MCUboot
+ * Zephyr Port for ESP chips or a Zephyr application with MCUboot
+ * compatibilty (that builds the bootutil lib).
+ * In these cases, MCUBOOT_BOOT_MAX_ALIGN value must be taken from DT if
+ * the write-block-size is greater than 8 */
+#if DT_PROP(DT_CHOSEN(zephyr_flash), write_block_size) > 8
+#define MCUBOOT_BOOT_MAX_ALIGN DT_PROP(DT_CHOSEN(zephyr_flash), write_block_size)
 #endif
 
 /*