at91: add support for sama7g5-ek board

Add support for SAMA7G5-EK board.
Hardware:
- SoC: SAMA7G5
- RAM: Aliance Memory AS4C256M16D3LC (4 Gbit DDR3L)
- SD/MMC: 1 standard 4bit SD Card interface
- USB: 1 Micro-AB host/device, 1 Type-A host, 1 Type-C host
- CAN: 2 interfaces
- Ethernet: 10/100 port, 1Gbps port
- Wi-Fi/BT: 1 optional interface
- Audio: 1 SPDIF RX port, 1 SPDIF TX port, 4 digital microphones
- Camera: 1 RPi CSI camera interface
- Debug: 1 J-Link-OB + CDC, 1 JTAG
- LEDs: 1 RGB
- Buttons: 4 push buttons
- Expansions: 1 RPi Expansion connector, 2 mikroBUS connectors
- Power management: 1 power management IC, 1 power consumption
  measurement device

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>

target/linux/at91/base-files/etc/board.d/02_network

@@ -8,7 +8,7 @@ board_config_update
 
 case "$(board_name)" in
 
-atmel,sama5d3-xplained)
+atmel,sama5d3-xplained|microchip,sama7g5ek)
 	ucidef_set_interfaces_lan_wan "eth0" "eth1"
 	;;
 

target/linux/at91/image/sama7.mk

@@ -0,0 +1,57 @@
+
+define Device/default-nand
+  BLOCKSIZE := 128k
+  PAGESIZE := 2048
+  SUBPAGESIZE := 2048
+  MKUBIFS_OPTS := -m $$(PAGESIZE) -e 124KiB -c 2048
+endef
+
+define Build/at91-sdcard
+  $(if $(findstring ext4,$@), \
+  rm -f $@.boot
+  mkfs.fat -C $@.boot $(FAT32_BLOCKS)
+
+  mcopy -i $@.boot \
+	$(KDIR)/$(DEVICE_NAME)-fit-zImage.itb \
+	::$(DEVICE_NAME)-fit.itb
+
+  mcopy -i $@.boot \
+	$(BIN_DIR)/u-boot-$(DEVICE_DTS:at91-%=%)_mmc1/u-boot.bin \
+	::u-boot.bin
+
+  mcopy -i $@.boot \
+	$(BIN_DIR)/at91bootstrap-$(DEVICE_DTS:at91-%=%)sd_uboot/at91bootstrap.bin \
+	::BOOT.bin
+
+  $(CP) uboot-env.txt $@-uboot-env.txt
+  sed -i '2d;3d' $@-uboot-env.txt
+  sed -i '2i board='"$(DEVICE_NAME)"'' $@-uboot-env.txt
+  sed -i '3i board_name='"$(firstword $(SUPPORTED_DEVICES))"'' $@-uboot-env.txt
+
+  mkenvimage -s 0x4000 -o $@-uboot.env $@-uboot-env.txt
+
+  mcopy -i $@.boot $@-uboot.env ::uboot.env
+
+  ./gen_at91_sdcard_img.sh \
+	$@.img \
+	$@.boot \
+	$(KDIR)/root.ext4 \
+	$(AT91_SD_BOOT_PARTSIZE) \
+	$(CONFIG_TARGET_ROOTFS_PARTSIZE)
+
+  gzip -nc9 $@.img > $@
+
+  rm -f $@.img $@.boot $@-uboot.env $@-uboot-env.txt)
+endef
+
+define Device/microchip_sama7g5-ek
+  $(Device/evaluation-dtb)
+  DEVICE_VENDOR := Microchip
+  DEVICE_MODEL := SAMA7G5-EK
+  DEVICE_DTS := at91-sama7g5ek
+  SUPPORTED_DEVICES := microchip,sama7g5ek
+  KERNEL_SIZE := 6144k
+  KERNEL_LOADADDR := 0x62000000
+  $(Device/evaluation-sdimage)
+endef
+TARGET_DEVICES += microchip_sama7g5-ek

target/linux/at91/image/uboot-env.txt

@@ -4,10 +4,11 @@ board_name=atmel,at91sam9x25ek
 bootargs=console=ttyS0,115200 earlyprintk root=/dev/mmcblk0p2 rw rootwait rootfstype=ext4
 bootargsd2=console=ttyS0,115200 earlyprintk root=/dev/mmcblk1p2 rw rootwait rootfstype=ext4
 bootargsxx=console=ttyS0,115200 earlyprintk root=/dev/mmcblk0p2 rw rootwait rootfstype=ext4
-bootcmd=run setbootargs; run fatload_mmc; bootm 0x21000000
+bootcmd=run setloadaddr; run setbootargs; run fatload_mmc; bootm ${loadaddr}
 bootdelay=1
-fatload_mmc=if test ${board_name} = atmel,sama5d2-xplained || test ${board_name} = atmel,sama5d27-som1-ek; then fatload mmc 1:1 0x21000000 ${board}-fit.itb; else fatload mmc 0:1 0x21000000 ${board}-fit.itb; fi
-setbootargs=if test ${board_name} = atmel,sama5d2-xplained || test ${board_name} = atmel,sama5d27-som1-ek; then setenv bootargs ${bootargsd2}; else setenv bootargs ${bootargsxx}; fi
+fatload_mmc=if test ${board_name} = atmel,sama5d2-xplained || test ${board_name} = atmel,sama5d27-som1-ek || test ${board_name} = microchip,sama7g5ek; then fatload mmc 1:1 ${loadaddr} ${board}-fit.itb; else fatload mmc 0:1 ${loadaddr} ${board}-fit.itb; fi
+setbootargs=if test ${board_name} = atmel,sama5d2-xplained || test ${board_name} = atmel,sama5d27-som1-ek || test ${board_name} = microchip,sama7g5ek; then setenv bootargs ${bootargsd2}; else setenv bootargs ${bootargsxx}; fi
+setloadaddr=if test ${board_name} = microchip,sama7g5ek; then setenv loadaddr 0x63000000; else setenv loadaddr 0x21000000; fi
 ethact=gmac0
 stderr=serial
 stdin=serial