fpga: add new symbol for fpga_loadb

Adding new symbol for the fpga loadb command which is exclusive to
Xilinx. Default value is y for backward compatibility.

Clarify the type of file used for fpga programming commands

Signed-off-by: Ibai Erkiaga <ibai.erkiaga-elorza@amd.com>
Link: https://lore.kernel.org/r/20250121130138.1999916-6-ibai.erkiaga-elorza@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index d59a000..1f9b269 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1178,19 +1178,26 @@
 	help
 	  FPGA support.
 
+config CMD_FPGA_LOADB
+	bool "fpga loadb - load bitstream file"
+	default y
+	depends on CMD_FPGA && FPGA_XILINX
+	help
+	  Supports loading an FPGA device from a bitstream file (.BIT)
+
 config CMD_FPGA_LOADP
 	bool "fpga loadp - load partial bitstream"
 	depends on CMD_FPGA
 	help
-	  Supports loading an FPGA device from a bitstream buffer containing
-	  a partial bitstream.
+	  Supports loading an FPGA device from a bitstream buffer (.BIN)
+	  containing a partial bitstream.
 
 config CMD_FPGA_LOADBP
-	bool "fpga loadbp - load partial bitstream"
+	bool "fpga loadbp - load partial bitstream file"
 	depends on CMD_FPGA && FPGA_XILINX
 	help
-	  Supports loading an FPGA device from a bitstream buffer containing
-	  a partial bitstream.
+	  Supports loading an FPGA device from a bitstream file (.BIT)
+	  containing a partial bitstream.
 
 config CMD_FPGA_LOADFS
 	bool "fpga loadfs - load bitstream from FAT filesystem"
diff --git a/cmd/fpga.c b/cmd/fpga.c
index 75d2f82..212f421 100644
--- a/cmd/fpga.c
+++ b/cmd/fpga.c
@@ -180,6 +180,7 @@
 	return fpga_load(dev, (void *)fpga_data, data_size, BIT_FULL, 0);
 }
 
+#if defined(CONFIG_CMD_FPGA_LOADB)
 static int do_fpga_loadb(struct cmd_tbl *cmdtp, int flag, int argc,
 			 char *const argv[])
 {
@@ -194,7 +195,7 @@
 
 	return fpga_loadbitstream(dev, (void *)fpga_data, data_size, BIT_FULL);
 }
-
+#endif
 #if defined(CONFIG_CMD_FPGA_LOADP)
 static int do_fpga_loadp(struct cmd_tbl *cmdtp, int flag, int argc,
 			 char *const argv[])
@@ -356,7 +357,9 @@
 	U_BOOT_CMD_MKENT(info, 1, 1, do_fpga_info, "", ""),
 	U_BOOT_CMD_MKENT(dump, 3, 1, do_fpga_dump, "", ""),
 	U_BOOT_CMD_MKENT(load, 3, 1, do_fpga_load, "", ""),
+#if defined(CONFIG_CMD_FPGA_LOADB)
 	U_BOOT_CMD_MKENT(loadb, 3, 1, do_fpga_loadb, "", ""),
+#endif
 #if defined(CONFIG_CMD_FPGA_LOADP)
 	U_BOOT_CMD_MKENT(loadp, 3, 1, do_fpga_loadp, "", ""),
 #endif
@@ -412,8 +415,9 @@
 	 "info   [dev]                  List known device information\n"
 	 "fpga dump   <dev> <address> <size> Load device to memory buffer\n"
 	 "fpga load   <dev> <address> <size> Load device from memory buffer\n"
+#if defined(CONFIG_CMD_FPGA_LOADP)
 	 "fpga loadb  <dev> <address> <size> Load device from bitstream buffer\n"
-	 "            (Xilinx only)\n"
+#endif
 #if defined(CONFIG_CMD_FPGA_LOADP)
 	 "fpga loadp  <dev> <address> <size> Load device from memory buffer\n"
 	 "            with partial bitstream\n"