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tty = open("/dev/ttyO0", O_RDONLY | O_WRONLY);
ioctl(tty, TIOCCONS);
close(tty);

	printk("RTC Access Enable Check\n");
	while(1)
	{	
		rtc_time_out = 0;
		// enable long time press power disable
		if ((readl(REG_RTC_AER) & 0x10000) == 0x0) {
			// set RTC register access enable password
			writel(0xA965, REG_RTC_AER);
			// make sure RTC register read/write enable
			while ((readl(REG_RTC_AER) & 0x10000) == 0x0)
			{
				rtc_time_out++;
				if(rtc_time_out > 0xFFFFFF)
				{
					printk("RTC Access Eanble Fail. AER:0x%X.\n", readl(REG_RTC_AER));
					break;
				}
			}
			rtc_wait_ready();

			if ((readl(REG_RTC_AER) & 0x10000) == 0x10000) 
				break;			
		}
		else
			break;
	}

Initial RTC .Enable Access Fail - Timeout
DRAM Init..1f1f1f1f1f
SD Port 0 Booting - EMMC Fail - No Boot Code Header
NAND CS0 Booting Fail - No Boot Code Header
NAND CS1 Booting Fail - No Boot Code Header
SPI Booting 
     Write - 0xB0000204 = 0xFFFFFFFF
     Write - 0xB0000208 = 0xFFFFFFFF
     Write - 0xB0003008 = 0x0000805A
     Write - 0xB0003028 = 0x2AFF3B4A
     Write - 0xB0003004 = 0x00000021
     Delay 256 us
     Write - 0xB0003004 = 0x00000023
     Write - 0xB0003004 = 0x00000027
     Delay 256 us
     Write - 0xB000301C = 0x00002402
     Delay 256 us
     Write - 0xB0003018 = 0x00000532
     Delay 256 us
     Write - 0xB0003004 = 0x00000027
     Delay 256 us
     Write - 0xB0003004 = 0x0000002B
     Delay 256 us
     Write - 0xB0003004 = 0x0000002B
     Delay 256 us
     Write - 0xB0003018 = 0x00000432
     Delay 256 us
     Write - 0xB000301C = 0x00002782
     Delay 256 us
     Write - 0xB000301C = 0x00002402
     Delay 256 us
     Write - 0xB0003004 = 0x00000020
     Delay 256 us
     Write - 0xB0003054 = 0x00000013
     Delay 4096 us
     Write - 0xB0003054 = 0x0000001E
     Delay 20480 us
     DRAM CMD0
     Delay 4096 us
     DRAM CMD2
     DRAM CMD2
     Write - 0xB0003054 = 0x0000001A
     Delay 8192 us
     Write - 0xB0000208 = 0x00008354
     Write - 0xB0000204 = 0x00E5011F
Success
Execute Address 0x00900000
SPI Loader start (20140710).
Want to set DRAM DIV REG = 0x8
11111.13.Ap3:MPLL REG = 0x1178
DRAM DIV REG = 0x8
Enable HW Power Off
Load Image Load file length 0x400, execute address 0x80905C40
Load file length 0x4A38A0, execute address 0x0
Jump to kernelLinux version 2.6.35.4 (root@nuvoton) (gcc version 4.2.1) #195 PREEMPT Wed Mar 14 19:18:59 CST 2018
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
CPU: VIVT data cache, VIVT instruction cache
Machine: W55FA92
Memory policy: ECC disabled, Data cache writeback
Decoder Instance-0, width = 1280, height = 720
Decoder Instance-0, offset = 0x0, total buf size = 0x77b000
Encoder Instance-0, width = 1280, height = 720
Encoder Instance-0, offset = 0x0, total buf size = 0x42f000
TOTAL_VDE_BUF_SIZE = 0xbaa000, dec_total=0x77b000, enc_total=0x42f000
AVC Buffer Size: 0xbaa000
VIN_DEV1 Buffer Size: 0x238800
CPU type 0x00fad007 is W55FA92
w55fa92_external_clock  = 12.0 MHz
w55fa92_apll_clock      = 432000 KHz
w55fa92_upll_clock      = 240000 KHz
w55fa92_mpll_clock      = 360000 KHz
w55fa92_system_clock    = 240000 KHz
w55fa92_cpu_clock       = 240000 KHz
w55fa92_ahb_clock       = 120000 KHz
w55fa92_apb_clock       = 60000 KHz
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 16256
Kernel command line: root=/dev/ram0 console=ttyS1,115200n8 rdinit=/sbin/init mem=64M vt.global_cursor_default=0
PID hash table entries: 256 (order: -2, 1024 bytes)
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory: 64MB = 64MB total
Memory: 45856k/45856k available, 19680k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xff600000 - 0xffe00000   (   8 MB)
    vmalloc : 0xc4800000 - 0xe0000000   ( 440 MB)
    lowmem  : 0xc0000000 - 0xc4000000   (  64 MB)
    modules : 0xbf000000 - 0xc0000000   (  16 MB)
      .init : 0xc0008000 - 0xc0142000   (1256 kB)
      .text : 0xc0142000 - 0xc0486000   (3344 kB)
      .data : 0xc0486000 - 0xc04a3820   ( 119 kB)
Hierarchical RCU implementation.
        RCU-based detection of stalled CPUs is disabled.
        Verbose stalled-CPUs detection is disabled.
NR_IRQS:47
Console: colour dummy device 80x30
w55fa92_serial_initconsole, w55fa92-uart
w55fa92_serial_init_ports: initialising ports...
w55fa92_serial_init_port: port=c0496654, platdev=c048b748
w55fa92_serial_init_port: c0496654 (hw 0)...
resource c048b6d8 (b8008000..b80080ff)
port: map=b8008000, mem=f8008000, irq=14, clock=12000000
w55fa92_serial_resetport: port=c0496654 (b8008000), cfg=c048c158
w55fa92_serial_init_port: port=c04966f8, platdev=c048b800
w55fa92_serial_init_port: c04966f8 (hw 1)...
resource c048b710 (b8008100..b80081ff)
port: map=b8008100, mem=f8008100, irq=30, clock=12000000
w55fa92_serial_resetport: port=c04966f8 (b8008100), cfg=c048c174
w55fa92_serial_console_setup: port=c04966f8 (1)
w55fa92_serial_console_setup: baud 115200
baud=115200, quot=102
w-config: 8bits/char
console [ttyS1] enabled
w55fa92_avc_alloc_mem : Kernel allocate phy buf addr =0x4c7000, vir_addr = 0xc04c7000
ENCODER_TOTAL_SIZE = 0x42f000, DECODER_TOTAL_SIZE = 0x77b000
w55fa92_avc_alloc_mem,_ENCODER_BUF_START = 0x4c7000,  _DECODER_BUF_START = 0x8f6000,
Calibrating delay loop... 119.19 BogoMIPS (lpj=595968)
pid_max: default: 32768 minimum: 301
Mount-cache hash table entries: 512
CPU: Testing write buffer coherency: ok
devtmpfs: initialized
NET: Registered protocol family 16
bio: create slab <bio-0> at 0
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
Advanced Linux Sound Architecture Driver Version 1.0.23.
cfg80211: Calling CRDA to update world regulatory domain
Switching to clocksource w55fa92-timer1
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 2048 (order: 2, 16384 bytes)
TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
TCP: Hash tables configured (established 2048 bind 2048)
TCP reno registered
UDP hash table entries: 256 (order: 0, 4096 bytes)
UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
NET: Registered protocol family 1
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
register clock device
w55fa92_edma_init
ROMFS MTD (C) 2007 Red Hat, Inc.
msgmni has been set to 89
io scheduler noop registered (default)
---w55fa92fb_init ----w55fa92 frame buffer init 
###########w55fa92 frame buffer probe############
1*** fbi->fb->fix.smem_len = 0x70800
check_var(var=c3c9b020, info=c3c9b000)
w55fa92fb_set_par !!! ================= 
var->width = 0x140 !!!
var->bits_per_pixel = 0x10 !!!
w55fa92fb_set_par !!! ================= 
var->width = 0x140 !!!
var->bits_per_pixel = 0x10 !!!
Console: switching to colour frame buffer device 40x30
w55fa92 LCD driver has been installed successfully
paq 1=0x33cc55aa
w55fa92_gpio_configure()-1,13
w55fa92_gpio_configure()-1,14
paq 2:0xffffffff
w55fa92 paq5406_module initialized successfully!
w55fa92 SysMgr driver has been initialized successfully!
fa92 vpe register char device Successful!
w55fa92 VPE driver has been initialized successfully!
W55FA92 uart driver has been initialized successfully!
w55fa92_serial_init(c04965e4,c0496630)
w55fa92_serial_probe(c048b748, c0496630) 0
w55fa92_serial_probe: initialising port c0496640...
w55fa92_serial_init_port: port=c0496654, platdev=c048b748
w55fa92_serial_probe: adding port
w55fa92-uart0: ttyS0 at MMIO 0xb8008000 (irq = 14) is a W55FA92
w55fa92_serial_probe(c048b800, c0496630) 1
w55fa92_serial_probe: initialising port c04966e4...
w55fa92_serial_init_port: port=c04966f8, platdev=c048b800
w55fa92_serial_probe: adding port
w55fa92-uart1: ttyS1 at MMIO 0xb8008100 (irq = 30) is a W55FA92
brd: module loaded
loop: module loaded
w55fa92_avc_init
fa92 AVC Decoder Supported
FAVC Decoder IRQ mode(33)v1.0
fa92 AVC Encoder Supported
FAVC Encoder IRQ mode(34)v1.0
H264 Driver Version v1.0
### W55FA92 ether driver v0.1 has been initialized successfully!
rtl8150: v0.6.2 (2004/08/27):rtl8150 based usb-ethernet driver
usbcore: registered new interface driver rtl8150
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
USBH2.0 Clock source is UPLL, divider is 5
Over-current is Disabled - REG_OpModEn = 0x00000000
w55fa92-ehci w55fa92-ehci: Nuvoton w55fa92 EHCI Host Controller
w55fa92-ehci w55fa92-ehci: new USB bus registered, assigned bus number 1
w55fa92-ehci w55fa92-ehci: irq 21, io mem 0xb100b000
w55fa92-ehci w55fa92-ehci: USB 2.0 started, EHCI 0.95
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 1 port detected
USB device plug in
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
ohci_hcd_w55fa92_drv_probe
usb_hcd_w55fa92_probe
w55fa92-ohci w55fa92-ohci: Nuvoton W55FA92 OHCI Host Controller
w55fa92-ohci w55fa92-ohci: new USB bus registered, assigned bus number 2
w55fa92-ohci w55fa92-ohci: irq 22, io mem 0xb1005000
ohci_w55fa92_start
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
USB device plug in
Initializing USB Mass Storage driver...
usbcore: registered new interface driver usb-storage
USB Mass Storage support registered.
w55fa92_udc_probe 20140401
w55fa92-rtc w55fa92-rtc: rtc core: registered w55fa92-rtc as rtc0
<USBD - USBD plug>
Check RTC Level Shift Status
-> Level Shift is enabled!
RTC Access Enable Check
RTC Access Eanble Fail. AER:0xA965.
RTC Access Eanble Fail. AER:0xA965.
RTC Access Eanble Fail. AER:0xA965.
RTC Access Eanble Fail. AER:0xA965.