[U-Boot] [PATCH v3 28/58] env: fat: Add func to get fat device, partition

[Jagan Teki]

Get a fat device and partition for multiple families
of same SoC type can be difficult to handle with static
CONFIG_ENV_FAT_DEVICE_AND_PART via Kconfig.

So, add a generic weak function to get the device, partition
and give relevant users to define their own logic to setup
fat device and partition.

Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
 env/fat.c     | 9 +++++++--
 include/fat.h | 1 +
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/env/fat.c b/env/fat.c
index 7f74c64dfe..2147cc0326 100644
--- a/env/fat.c
+++ b/env/fat.c
@@ -30,6 +30,11 @@
 # endif
 #endif
 
+__weak char *get_env_fat_dev_part(void)
+{
+	return CONFIG_ENV_FAT_DEVICE_AND_PART;
+}
+
 #ifdef CMD_SAVEENV
 static int env_fat_save(void)
 {
@@ -45,7 +50,7 @@ static int env_fat_save(void)
 		return err;
 
 	part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
-					CONFIG_ENV_FAT_DEVICE_AND_PART,
+					get_env_fat_dev_part(),
 					&dev_desc, &info, 1);
 	if (part < 0)
 		return 1;
@@ -92,7 +97,7 @@ static int env_fat_load(void)
 #endif
 
 	part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
-					CONFIG_ENV_FAT_DEVICE_AND_PART,
+					get_env_fat_dev_part(),
 					&dev_desc, &info, 1);
 	if (part < 0)
 		goto err_env_relocate;
diff --git a/include/fat.h b/include/fat.h
index 09e1423685..0552fa54b5 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -185,6 +185,7 @@ static inline u32 sect_to_clust(fsdata *fsdata, int sect)
 	return (sect - fsdata->data_begin) / fsdata->clust_size;
 }
 
+char *get_env_fat_dev_part(void);
 int file_fat_detectfs(void);
 int fat_exists(const char *filename);
 int fat_size(const char *filename, loff_t *size);
-- 
2.18.0.321.gffc6fa0e3