Kernel 5.4 RUTX support

common/package/boot/uboot-ipq40xx/src/doc/README.sh7785lcr

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+========================================
+Renesas Technology R0P7785LC0011RL board
+========================================
+
+This board specification:
+=========================
+
+The R0P7785LC0011RL(board config name:sh7785lcr) has the following device:
+
+ - SH7785 (SH-4A)
+ - DDR2-SDRAM 512MB
+ - NOR Flash 64MB
+ - 2D Graphic controller
+ - SATA controller
+ - Ethernet controller
+ - USB host/peripheral controller
+ - SD controller
+ - I2C controller
+ - RTC
+
+This board has 2 physical memory maps. It can be changed with DIP switch(S2-5).
+
+ phys address			| S2-5 = OFF	| S2-5 = ON
+ -------------------------------+---------------+---------------
+ 0x00000000 - 0x03ffffff(CS0)	| NOR Flash	| NOR Flash
+ 0x04000000 - 0x05ffffff(CS1)	| PLD		| PLD
+ 0x06000000 - 0x07ffffff(CS1)	| reserved	| I2C
+ 0x08000000 - 0x0bffffff(CS2)	| USB		| DDR SDRAM
+ 0x0c000000 - 0x0fffffff(CS3)	| SD		| DDR SDRAM
+ 0x10000000 - 0x13ffffff(CS4)	| SM107		| SM107
+ 0x14000000 - 0x17ffffff(CS5)	| I2C		| USB
+ 0x18000000 - 0x1bffffff(CS6)	| reserved	| SD
+ 0x40000000 - 0x5fffffff	| DDR SDRAM	| (cannot use)
+
+
+configuration for This board:
+=============================
+
+You can choose configuration as follows:
+
+ - make sh7785lcr_config
+ - make sh7785lcr_32bit_config
+
+When you use "make sh7785lcr_config", there is build U-Boot for 29-bit
+address mode. This mode can use 128MB DDR-SDRAM.
+
+When you use "make sh7785lcr_32bit_config", there is build U-Boot for 32-bit
+extended address mode. This mode can use 384MB DDR-SDRAM. And if you run
+"pmb" command, this mode can use 512MB DDR-SDRAM.
+
+ * 32-bit extended address mode PMB mapping *
+  a) on start-up
+   virt		| phys		| size		| device
+   -------------+---------------+---------------+---------------
+   0x88000000	| 0x48000000	| 384MB		| DDR-SDRAM (Cacheable)
+   0xa0000000	| 0x00000000	| 64MB		| NOR Flash
+   0xa4000000	| 0x04000000	| 16MB		| PLD
+   0xa6000000	| 0x08000000	| 16MB		| USB
+   0xa8000000	| 0x48000000	| 384MB		| DDR-SDRAM (Non-cacheable)
+
+  b) after "pmb" command
+   virt		| phys		| size		| device
+   -------------+---------------+---------------+---------------
+   0x80000000	| 0x40000000	| 512MB		| DDR-SDRAM (Cacheable)
+   0xa0000000	| 0x40000000	| 512MB		| DDR-SDRAM (Non-cacheable)
+
+
+This board specific command:
+============================
+
+This board has the following its specific command:
+
+ - hwtest
+ - printmac
+ - setmac
+ - pmb (sh7785lcr_32bit_config only)
+
+
+1. hwtest
+
+This is self-check command. This command has the following options:
+
+ - all		: test all hardware
+ - pld		: output PLD version
+ - led		: turn on LEDs
+ - dipsw	: test DIP switch
+ - sm107	: output SM107 version
+ - net		: check RTL8110 ID
+ - sata		: check SiI3512 ID
+ - net		: output PCI slot device ID
+
+i.e)
+=> hwtest led
+turn on LEDs 3, 5, 7, 9
+turn on LEDs 4, 6, 8, 10
+
+=> hwtest net
+Ethernet OK
+
+
+2. printmac
+
+This command outputs MAC address of this board.
+
+i.e)
+=> printmac
+MAC = 00:00:87:**:**:**
+
+
+3. setmac
+
+This command writes MAC address of this board.
+
+i.e)
+=> setmac 00:00:87:**:**:**
+
+
+4. pmb
+
+This command change PMB for DDR-SDRAM all mapping. However you cannot use
+NOR Flash and USB Host on U-Boot when you run this command.
+i.e)
+=> pmb