[PATCH 2/2] mtd: bootdev: Add Kconfig option for defining script parameters

[Wadim Egorov]

Introduce USE_SPI_FLASH_SCRIPT Kconfig option to enable setting default
environment values for loading boot scripts from SPI flash. When enabled,
SPI_FLASH_SCRIPT_OFFSET and SPI_FLASH_SCRIPT_SIZE define the default
script_offset_f and script_size_f variables.

Signed-off-by: Wadim Egorov <w.egorov at phytec.de>
---
 drivers/mtd/spi/Kconfig | 26 ++++++++++++++++++++++++++
 include/env_default.h   |  4 ++++
 2 files changed, 30 insertions(+)

diff --git a/drivers/mtd/spi/Kconfig b/drivers/mtd/spi/Kconfig
index ca60a425ba3..fc154ec89d7 100644
--- a/drivers/mtd/spi/Kconfig
+++ b/drivers/mtd/spi/Kconfig
@@ -89,6 +89,32 @@ config BOOTDEV_SPI_FLASH
 
 	  If unsure, say N
 
+config USE_SPI_FLASH_SCRIPT
+	bool "Enable default SPI flash script parameters"
+	depends on BOOTDEV_SPI_FLASH
+	help
+	  Enable this option to provide default values for SPI flash script loading.
+	  These values will be assigned to the 'script_offset_f' and 'script_size_f'
+	  environment variables at boot time if not already defined in the environment.
+
+	  If unsure, say N.
+
+config SPI_FLASH_SCRIPT_OFFSET
+	hex "Offset for SPI flash script (script_offset_f)"
+	depends on USE_SPI_FLASH_SCRIPT
+	help
+	  This option sets the default value for the 'script_offset_f' environment
+	  variable. It specifies the offset (in bytes) in SPI flash from which
+	  the boot script should be loaded.
+
+config SPI_FLASH_SCRIPT_SIZE
+	hex "Size of SPI flash script (script_size_f)"
+	depends on USE_SPI_FLASH_SCRIPT
+	help
+	  This option sets the default value for the 'script_size_f' environment
+	  variable. It specifies the number of bytes to read from SPI flash to
+	  load the boot script.
+
 config SPI_FLASH_SFDP_SUPPORT
 	bool "SFDP table parsing support for SPI NOR flashes"
 	depends on !SPI_FLASH_BAR
diff --git a/include/env_default.h b/include/env_default.h
index c72cf123004..9f2f222519d 100644
--- a/include/env_default.h
+++ b/include/env_default.h
@@ -127,6 +127,10 @@ const char default_environment[] = {
 #ifdef CONFIG_BOOTSCRIPT_DHCP
 	"boot_script_dhcp="	CONFIG_BOOTSCRIPT_DHCP	"\0"
 #endif
+#ifdef USE_SPI_FLASH_SCRIPT
+	"script_offset_f="	__stringify(CONFIG_SPI_FLASH_SCRIPT_OFFSET)"\0"
+	"script_size_f="	__stringify(CONFIG_SPI_FLASH_SCRIPT_SIZE)"\0"
+#endif
 #ifdef CONFIG_EXTRA_ENV_TEXT
 	/* This is created in the Makefile */
 	CONFIG_EXTRA_ENV_TEXT
-- 
2.34.1