package/rpi-firmware: only install one firmware file

Since only one firmware is used to boot the Raspberry Pi, there is no
reason to install all of them.

Add an option to select what firmware to install.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/rpi-firmware/Config.in

@@ -7,3 +7,42 @@ config BR2_PACKAGE_RPI_FIRMWARE
 
 	  https://github.com/raspberrypi/firmware
 
+if BR2_PACKAGE_RPI_FIRMWARE
+
+choice
+	bool "Firmware to boot"
+	default BR2_PACKAGE_RPI_FIRMWARE_DEFAULT
+	help
+	  There are three different firmware files:
+	    - the default firmware, that enables standard GPU features;
+	    - the extended firmware, that enables additional GPU features
+	      (eg. more audio/video codecs);
+	    - the cut-down firmware, for emergency situations, with only
+	      features required to boot a Linux kernel.
+
+config BR2_PACKAGE_RPI_FIRMWARE_DEFAULT
+	bool "default"
+	help
+	  The default firmware, that enables standard GPU features.
+
+config BR2_PACKAGE_RPI_FIRMWARE_X
+	bool "extended ('x', more codecs)"
+	help
+	  The extended firmware, that enables additional GPU features
+	  (eg. more audio/video codecs).
+
+config BR2_PACKAGE_RPI_FIRMWARE_CD
+	bool "cut-down ('cd', emergency)"
+	help
+	  The cut-down firmware, for emergency situations, with only
+	  features required to boot a Linux kernel.
+
+endchoice
+
+config BR2_PACKAGE_RPI_FIRMWARE_BOOT
+	string
+	default ""      if BR2_PACKAGE_RPI_FIRMWARE_DEFAULT
+	default "_x"    if BR2_PACKAGE_RPI_FIRMWARE_X
+	default "_cd"   if BR2_PACKAGE_RPI_FIRMWARE_CD
+
+endif # BR2_PACKAGE_RPI_FIRMWARE

package/rpi-firmware/rpi-firmware.mk

@@ -11,12 +11,8 @@ RPI_FIRMWARE_LICENSE_FILES = boot/LICENCE.broadcom
 
 define RPI_FIRMWARE_INSTALL_TARGET_CMDS
 	$(INSTALL) -D -m 0644 $(@D)/boot/bootcode.bin $(BINARIES_DIR)/rpi-firmware/bootcode.bin
-	$(INSTALL) -D -m 0644 $(@D)/boot/start.elf $(BINARIES_DIR)/rpi-firmware/start.elf
-	$(INSTALL) -D -m 0644 $(@D)/boot/start_cd.elf $(BINARIES_DIR)/rpi-firmware/start_cd.elf
-	$(INSTALL) -D -m 0644 $(@D)/boot/start_x.elf $(BINARIES_DIR)/rpi-firmware/start_x.elf
-	$(INSTALL) -D -m 0644 $(@D)/boot/fixup.dat $(BINARIES_DIR)/rpi-firmware/fixup.dat
-	$(INSTALL) -D -m 0644 $(@D)/boot/fixup_cd.dat $(BINARIES_DIR)/rpi-firmware/fixup_cd.dat
-	$(INSTALL) -D -m 0644 $(@D)/boot/fixup_x.dat $(BINARIES_DIR)/rpi-firmware/fixup_x.dat
+	$(INSTALL) -D -m 0644 $(@D)/boot/start$(BR2_PACKAGE_RPI_FIRMWARE_BOOT).elf $(BINARIES_DIR)/rpi-firmware/start.elf
+	$(INSTALL) -D -m 0644 $(@D)/boot/fixup$(BR2_PACKAGE_RPI_FIRMWARE_BOOT).dat $(BINARIES_DIR)/rpi-firmware/fixup.dat
 	$(INSTALL) -D -m 0644 package/rpi-firmware/config.txt $(BINARIES_DIR)/rpi-firmware/config.txt
 	$(INSTALL) -D -m 0644 package/rpi-firmware/cmdline.txt $(BINARIES_DIR)/rpi-firmware/cmdline.txt
 endef