[PATCH v3 1/2] mtd: cfi_flash: use cfi_flash_num_flash_banks only when supported

[Patrick Delaunay]

When CONFIG_SYS_MAX_FLASH_BANKS_DETECT is activated,
CONFIG_SYS_MAX_FLASH_BANKS is replaced by cfi_flash_num_flash_banks,
but this variable is defined in drivers/mtd/cfi_flash.c, which is
compiled only when CONFIG_FLASH_CFI_DRIVER is activated, in U-Boot
or in SPL when CONFIG_SPL_MTD_SUPPORT is activated.

This patch deactivates this feature CONFIG_SYS_MAX_FLASH_BANKS_DETECT
when flash cfi driver is not activated to avoid compilation issue in
the next patch, when CONFIG_SYS_MAX_FLASH_BANKS is used in spi_nor_scan().

Signed-off-by: Patrick Delaunay <patrick.delaunay at foss.st.com>
---
see error in
https://source.denx.de/u-boot/custodians/u-boot-stm/-/pipelines/9138

drivers/mtd/spi/spi-nor-core.o: in function `spi_nor_scan':
drivers/mtd/spi/spi-nor-core.c:3672:
    undefined reference to `cfi_flash_num_flash_banks'

compilation issue for the boards:
- j721e_hs_evm_r5
- j721e_evm_r5j
- j721e_hs_evm_a72
- j721e_evm_a72
- sagem_f at st1704_ram

Changes in v3:
- NEW: solve compilation issue when CONFIG_SYS_MAX_FLASH_BANKS is used

 include/mtd/cfi_flash.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/mtd/cfi_flash.h b/include/mtd/cfi_flash.h
index 4963c89642..a1af6fc200 100644
--- a/include/mtd/cfi_flash.h
+++ b/include/mtd/cfi_flash.h
@@ -157,11 +157,17 @@ struct cfi_pri_hdr {
  * Use CONFIG_SYS_MAX_FLASH_BANKS_DETECT if defined
  */
 #if defined(CONFIG_SYS_MAX_FLASH_BANKS_DETECT)
-#define CONFIG_SYS_MAX_FLASH_BANKS	(cfi_flash_num_flash_banks)
 #define CFI_MAX_FLASH_BANKS	CONFIG_SYS_MAX_FLASH_BANKS_DETECT
+/* map to cfi_flash_num_flash_banks only when supported */
+#if IS_ENABLED(CONFIG_FLASH_CFI_DRIVER) && \
+    (!IS_ENABLED(CONFIG_SPL_BUILD) || IS_ENABLED(CONFIG_SPL_MTD_SUPPORT))
+#define CONFIG_SYS_MAX_FLASH_BANKS	(cfi_flash_num_flash_banks)
 /* board code can update this variable before CFI detection */
 extern int cfi_flash_num_flash_banks;
 #else
+#define CONFIG_SYS_MAX_FLASH_BANKS	CONFIG_SYS_MAX_FLASH_BANKS_DETECT
+#endif
+#else
 #define CFI_MAX_FLASH_BANKS	CONFIG_SYS_MAX_FLASH_BANKS
 #endif
 
-- 
2.25.1