ramips: add mt7620-nand driver for NAND flash

This add the mt7620-nand driver and enable nand ubifs for
mt7620 subtarget, closed: #8097, #8402, #8405

Fixes: 3625a730 ("ramips: switch to kernel 5.10")

Signed-off-by: Chen Minqiang <ptpt52@gmail.com>

target/linux/ramips/mt7620/config-5.4

@@ -34,6 +34,11 @@ CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y
 CONFIG_CPU_SUPPORTS_HIGHMEM=y
 CONFIG_CPU_SUPPORTS_MSA=y
 CONFIG_CRYPTO_LIB_POLY1305_RSIZE=2
+CONFIG_CRC16=y
+CONFIG_CRYPTO_ACOMP2=y
+CONFIG_CRYPTO_DEFLATE=y
+CONFIG_CRYPTO_HASH_INFO=y
+CONFIG_CRYPTO_LZO=y
 CONFIG_CRYPTO_RNG2=y
 CONFIG_CSRC_R4K=y
 CONFIG_DEBUG_PINCTRL=y
@@ -87,6 +92,8 @@ CONFIG_IRQ_MIPS_CPU=y
 CONFIG_IRQ_WORK=y
 CONFIG_LIBFDT=y
 CONFIG_LOCK_DEBUGGING_SUPPORT=y
+CONFIG_LZO_COMPRESS=y
+CONFIG_LZO_DECOMPRESS=y
 CONFIG_MARVELL_PHY=y
 CONFIG_MDIO_BUS=y
 CONFIG_MDIO_DEVICE=y
@@ -111,7 +118,9 @@ CONFIG_MODULES_USE_ELF_REL=y
 # CONFIG_MT7621_WDT is not set
 # CONFIG_MTD_CFI_INTELEXT is not set
 CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_NAND_MT7620=y
 CONFIG_MTD_PHYSMAP=y
+# CONFIG_MTD_SERCOMM_PARTS is not set
 CONFIG_MTD_SPI_NOR=y
 CONFIG_MTD_SPI_NOR_USE_4K_SECTORS=y
 CONFIG_MTD_SPI_NOR_USE_4K_SECTORS_LIMIT=16384
@@ -119,8 +128,13 @@ CONFIG_MTD_SPLIT_JIMAGE_FW=y
 CONFIG_MTD_SPLIT_SEAMA_FW=y
 CONFIG_MTD_SPLIT_TPLINK_FW=y
 CONFIG_MTD_SPLIT_UIMAGE_FW=y
+CONFIG_MTD_UBI=y
+CONFIG_MTD_UBI_BEB_LIMIT=20
+CONFIG_MTD_UBI_BLOCK=y
+# CONFIG_MTD_UBI_FASTMAP is not set
+# CONFIG_MTD_UBI_GLUEBI is not set
+CONFIG_MTD_UBI_WL_THRESHOLD=4096
 CONFIG_MTD_VIRT_CONCAT=y
-# CONFIG_MTD_SERCOMM_PARTS is not set
 CONFIG_NEED_DMA_MAP_STATE=y
 CONFIG_NEED_PER_CPU_KM=y
 CONFIG_NET_RALINK_GSW_MT7620=y
@@ -151,6 +165,7 @@ CONFIG_PGTABLE_LEVELS=2
 CONFIG_PHYLIB=y
 CONFIG_PHY_RALINK_USB=y
 CONFIG_PINCTRL=y
+# CONFIG_PINCTRL_AW9523 is not set
 CONFIG_PINCTRL_RT2880=y
 # CONFIG_PINCTRL_SINGLE is not set
 CONFIG_RALINK=y
@@ -161,6 +176,7 @@ CONFIG_RESET_CONTROLLER=y
 CONFIG_SERIAL_8250_RT288X=y
 CONFIG_SERIAL_MCTRL_GPIO=y
 CONFIG_SERIAL_OF_PLATFORM=y
+CONFIG_SGL_ALLOC=y
 CONFIG_SOC_MT7620=y
 # CONFIG_SOC_MT7621 is not set
 # CONFIG_SOC_RT288X is not set
@@ -189,6 +205,14 @@ CONFIG_TICK_CPU_ACCOUNTING=y
 CONFIG_TIMER_OF=y
 CONFIG_TIMER_PROBE=y
 CONFIG_TINY_SRCU=y
+CONFIG_UBIFS_ATIME_SUPPORT=y
+CONFIG_UBIFS_FS=y
+CONFIG_UBIFS_FS_ADVANCED_COMPR=y
+CONFIG_UBIFS_FS_LZO=y
+CONFIG_UBIFS_FS_ZLIB=y
+# CONFIG_UBIFS_FS_ZSTD is not set
 CONFIG_USB_SUPPORT=y
 CONFIG_USE_OF=y
 CONFIG_WATCHDOG_CORE=y
+CONFIG_ZLIB_DEFLATE=y
+CONFIG_ZLIB_INFLATE=y

target/linux/ramips/mt7620/target.mk

@@ -4,7 +4,7 @@
 
 SUBTARGET:=mt7620
 BOARDNAME:=MT7620 based boards
-FEATURES+=usb ramdisk
+FEATURES+=usb nand ramdisk
 CPU_TYPE:=24kc
 
 DEFAULT_PACKAGES += kmod-rt2800-soc wpad-openssl swconfig