各位好：
我司自己设计了AM335x 的一个开发板， 现在遇到如下几个问题。
1： uboot 里面 可正常识别到emmc
Device: OMAP SD/MMC
Manufacturer ID: 3
OEM: 5344
Name: SC16G
Tran Speed: 50000000
Rd Block Len: 512
SD version 3.0
High Capacity: Yes
Capacity: 14.8 GiB
Bus Width: 4-bit
U-Boot# mmc dev 1
mmc1(part 0) is current device
U-Boot# mmcinfo
Device: OMAP SD/MMC
Manufacturer ID: 11
OEM: 100
Name: 004G6
Tran Speed: 52000000
Rd Block Len: 512
MMC version 4.0
High Capacity: Yes
Capacity: 3.7 GiB
Bus Width: 4-bit
2： 正常启动的时候log
U-Boot 2014.04-rc2 (Sep 05 2014 - 15:34:02)
I2C: ready
DRAM: 256 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
reading env
** Unable to read "env" from mmc0:1 **
Using default environment
i2c_read: error waiting for addr ACK (status=0x116)
PCA9559_reg_read: 0x06 failed
Net: cpsw
Hit any key to stop autoboot: 0
** No partition table - mmc 1 **
There is no valid bmp file at the given address
mmc0 is current device
SD/MMC found on device 0
reading uEnv.txt
100 bytes read in 3 ms (32.2 KiB/s)
Loaded environment from uEnv.txt
Importing environment from mmc ...
reading uImage
3496112 bytes read in 470 ms (7.1 MiB/s)
## Booting kernel from Legacy Image at 82000000 ...
Image Name: Linux-3.2.0
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 3496048 Bytes = 3.3 MiB
Load Address: 80008000
Entry Point: 80008000
Verifying Checksum ... OK
Loading Kernel Image ... OK
Starting kernel ...
Uncompressing Linux... done, booting the kernel.
[ 0.000000] Linux version 3.2.0 (root@ubuntu) (gcc version 4.5.3 20110311 (prerelease) (GCC) ) #53 Wed Mar 7 14:54:04 CST 2018
[ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c53c7d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[ 0.000000] Machine: am335xevm
[ 0.000000] Memory policy: ECC disabled, Data cache writeback
[ 0.000000] AM335X ES2.1 (neon )
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: at arch/arm/mach-omap2/clkt_clksel.c:194 omap2_clksel_recalc+0xd0/0x130()
[ 0.000000] clock: Could not find fieldval 0 for clock dpll_core_m6_ck parent dpll_core_x2_ck
[ 0.000000] Modules linked in:
[ 0.000000] Backtrace:
[ 0.000000] [<c0017d68>] (dump_backtrace+0x0/0x110) from [<c04a0ec4>] (dump_stack+0x18/0x1c)
[ 0.000000] r6:c059f7f4 r5:000000c2 r4:c069fe80 r3:c06c1148
[ 0.000000] [<c04a0eac>] (dump_stack+0x0/0x1c) from [<c003e3e0>] (warn_slowpath_common+0x5c/0x6c)
[ 0.000000] [<c003e384>] (warn_slowpath_common+0x0/0x6c) from [<c003e494>] (warn_slowpath_fmt+0x38/0x40)
[ 0.000000] r8:c093d840 r7:00000001 r6:00000002 r5:c06b2820 r4:00000000
[ 0.000000] r3:00000009
[ 0.000000] [<c003e45c>] (warn_slowpath_fmt+0x0/0x40) from [<c00305bc>] (omap2_clksel_recalc+0xd0/0x130)
[ 0.000000] r3:00000000 r2:c059f9cc
[ 0.000000] [<c00304ec>] (omap2_clksel_recalc+0x0/0x130) from [<c00343e4>] (propagate_rate+0x34/0x54)
[ 0.000000] r7:c06a45cc r6:c06a45cc r5:c06b2720 r4:c06b2820
[ 0.000000] [<c00343b0>] (propagate_rate+0x0/0x54) from [<c00343f0>] (propagate_rate+0x40/0x54)
[ 0.000000] r5:c06b26c4 r4:c06b270c
[ 0.000000] [<c00343b0>] (propagate_rate+0x0/0x54) from [<c00343f0>] (propagate_rate+0x40/0x54)
[ 0.000000] r5:c06b260c r4:c06b26b0
[ 0.000000] [<c00343b0>] (propagate_rate+0x0/0x54) from [<c00343f0>] (propagate_rate+0x40/0x54)
[ 0.000000] r5:c06b24f8 r4:c06b25f8
[ 0.000000] [<c00343b0>] (propagate_rate+0x0/0x54) from [<c0034560>] (recalculate_root_clocks+0x44/0x58)
[ 0.000000] r5:c06c08ac r4:c06b24e4
[ 0.000000] [<c003451c>] (recalculate_root_clocks+0x0/0x58) from [<c064a264>] (am33xx_clk_init+0x98/0xa8)
[ 0.000000] r5:c06b2374 r4:c06b2374
[ 0.000000] [<c064a1cc>] (am33xx_clk_init+0x0/0xa8) from [<c0649f80>] (omap3xxx_clk_init+0xf8/0x344)
[ 0.000000] r5:c0721054 r4:00003517
[ 0.000000] [<c0649e88>] (omap3xxx_clk_init+0x0/0x344) from [<c06447bc>] (am33xx_init_early+0x3c/0x40)
[ 0.000000] r7:c06a45cc r6:c06a45cc r5:c0721054 r4:c066b2ac
[ 0.000000] [<c0644780>] (am33xx_init_early+0x0/0x40) from [<c0640f68>] (setup_arch+0x7e8/0x834)
[ 0.000000] [<c0640780>] (setup_arch+0x0/0x834) from [<c063d590>] (start_kernel+0x88/0x2e0)
[ 0.000000] [<c063d508>] (start_kernel+0x0/0x2e0) from [<80008040>] (0x80008040)
[ 0.000000] r6:c066c6e4 r5:c06a0084 r4:10c53c7d
[ 0.000000] ---[ end trace 1b75b31a2719ed1c ]---
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 65024
[ 0.000000] Kernel command line: console=ttyO0,115200n8 noinitrd root=/dev/mmcblk0p2 rw rootfstype=ext3 rootwait lcdtype=AUO_AT070TN94 consoleblank=0
[ 0.000000] PID hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.000000] Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
[ 0.000000] Memory: 256MB = 256MB total
[ 0.000000] Memory: 252444k/252444k available, 9700k reserved, 0K highmem
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB)
[ 0.000000] vmalloc : 0xd0800000 - 0xff000000 ( 744 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xd0000000 ( 256 MB)
[ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB)
[ 0.000000] .text : 0xc0008000 - 0xc063d000 (6356 kB)
[ 0.000000] .init : 0xc063d000 - 0xc069d000 ( 384 kB)
[ 0.000000] .data : 0xc069e000 - 0xc070b720 ( 438 kB)
[ 0.000000] .bss : 0xc070b744 - 0xc073c078 ( 195 kB)
[ 0.000000] NR_IRQS:396
[ 0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts
[ 0.000000] Total of 128 interrupts on 1 active controller
[ 0.000000] OMAP clockevent source: GPTIMER2 at 24000000 Hz
[ 0.000000] omap_dm_timer_switch_src: Switching to HW default clocksource(sys_clkin_ck) for timer1, this may impact timekeeping in low power state
[ 0.000000] OMAP clocksource: GPTIMER1 at 24000000 Hz
[ 0.000000] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956ms
[ 0.000000] Console: colour dummy device 80x30
[ 0.000367] Calibrating delay loop... 298.59 BogoMIPS (lpj=1492992)
[ 0.063986] pid_max: default: 32768 minimum: 301
[ 0.064259] Security Framework initialized
[ 0.064461] Mount-cache hash table entries: 512
[ 0.065193] CPU: Testing write buffer coherency: ok
[ 0.066627] devtmpfs: initialized
[ 0.093457] omap_hwmod: gfx: failed to hardreset
[ 0.113545] omap_hwmod: pruss: failed to hardreset
[ 0.115708] print_constraints: dummy:
[ 0.116446] NET: Registered protocol family 16
[ 0.120904] OMAP GPIO hardware version 0.1
[ 0.126759] omap_mux_init: Add partition: #1: core, flags: 0
[ 0.130617] omap_i2c.1: alias fck already exists
[ 0.133670] da8xx_lcdc.0: alias fck already exists
[ 0.134389] omap_i2c.2: alias fck already exists
[ 0.137570] d_can.0: alias fck already exists
[ 0.138184] davinci-mcasp.1: alias fck already exists
[ 0.140393] omap2_mcspi.1: alias fck already exists
[ 0.140891] omap2_mcspi.2: alias fck already exists
[ 0.141483] edma.0: alias fck already exists
[ 0.141534] edma.0: alias fck already exists
[ 0.141580] edma.0: alias fck already exists
[ 0.206197] bio: create slab <bio-0> at 0
[ 0.210965] SCSI subsystem initialized
[ 0.215199] usbcore: registered new interface driver usbfs
[ 0.215914] usbcore: registered new interface driver hub
[ 0.216364] usbcore: registered new device driver usb
[ 0.216972] registerd cppi-dma Intr @ IRQ 17
[ 0.217004] Cppi41 Init Done Qmgr-base(d087a000) dma-base(d0878000)
[ 0.217028] Cppi41 Init Done
[ 0.217086] musb-ti81xx musb-ti81xx: musb0, board_mode=0x13, plat_mode=0x3
[ 0.217709] musb-ti81xx musb-ti81xx: musb1, board_mode=0x13, plat_mode=0x1
[ 0.234107] omap_i2c omap_i2c.1: bus 1 rev2.4.0 at 100 kHz
[ 0.235425] tps65217 1-0024: Failed to read revision register: -121
[ 0.235523] tps65217: probe of 1-0024 failed with error -121
[ 0.254089] omap_i2c omap_i2c.2: bus 2 rev2.4.0 at 100 kHz
[ 0.257531] Advanced Linux Sound Architecture Driver Version 1.0.24.
[ 0.259209] Bluetooth: Core ver 2.16
[ 0.259583] NET: Registered protocol family 31
[ 0.259613] Bluetooth: HCI device and connection manager initialized
[ 0.259647] Bluetooth: HCI socket layer initialized
[ 0.259672] Bluetooth: L2CAP socket layer initialized
[ 0.259731] Bluetooth: SCO socket layer initialized
[ 0.260928] cfg80211: Calling CRDA to update world regulatory domain
[ 0.263524] Switching to clocksource gp timer
[ 0.304921] musb-hdrc: version 6.0, ?dma?, otg (peripheral+host)
[ 0.305286] musb-hdrc musb-hdrc.0: dma type: dma-cppi41
[ 0.305969] MUSB0 controller's USBSS revision = 4ea20800
[ 0.306039] musb0: Enabled SW babble control
[ 0.307973] musb-hdrc musb-hdrc.0: USB OTG mode controller at d083e000 using DMA, IRQ 18
[ 0.308284] musb-hdrc musb-hdrc.1: dma type: dma-cppi41
[ 0.308910] MUSB1 controller's USBSS revision = 4ea20800
[ 0.308968] musb1: Enabled SW babble control
[ 0.309894] musb-hdrc musb-hdrc.1: MUSB HDRC host driver
[ 0.310069] musb-hdrc musb-hdrc.1: new USB bus registered, assigned bus number 1
[ 0.310334] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ 0.310371] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 0.310404] usb usb1: Product: MUSB HDRC host driver
[ 0.310430] usb usb1: Manufacturer: Linux 3.2.0 musb-hcd
[ 0.310455] usb usb1: SerialNumber: musb-hdrc.1
[ 0.312309] hub 1-0:1.0: USB hub found
[ 0.312369] hub 1-0:1.0: 1 port detected
[ 0.313763] musb-hdrc musb-hdrc.1: USB Host mode controller at d084a800 using DMA, IRQ 19
[ 0.314670] NET: Registered protocol family 2
[ 0.315035] IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.315619] TCP established hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.315996] TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.316221] TCP: Hash tables configured (established 8192 bind 8192)
[ 0.316249] TCP reno registered
[ 0.316277] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.316330] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.316713] NET: Registered protocol family 1
[ 0.317227] RPC: Registered named UNIX socket transport module.
[ 0.317257] RPC: Registered udp transport module.
[ 0.317277] RPC: Registered tcp transport module.
[ 0.317299] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.317731] NetWinder Floating Point Emulator V0.97 (double precision)
[ 0.318118] omap-gpmc omap-gpmc: GPMC revision 6.0
[ 0.337538] VFS: Disk quotas dquot_6.5.2
[ 0.337676] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[ 0.338840] msgmni has been set to 493
[ 0.345480] alg: No test for stdrng (krng)
[ 0.345631] io scheduler noop registered
[ 0.345656] io scheduler deadline registered
[ 0.345836] io scheduler cfq registered (default)
[ 0.348868] fb_probe-1551
[ 0.348899] fb_probe-1557: lcdc_info is 3
[ 0.348930] da8xx_lcdc da8xx_lcdc.0: GLCD: Found NHD-5.0-ATXI#-T-1 panel
[ 0.348966] lcd_init-925: this is frame buffer's init
[ 0.350012] lcdc configuration:
[ 0.350023] panel->width=800 panel->height=480 bpp=16
[ 0.368630] Console: switching to colour frame buffer device 100x30
[ 0.382329] omap_uart.0: ttyO0 at MMIO 0x44e09000 (irq = 72) is a OMAP UART0
[ 1.328265] console [ttyO0] enabled
[ 1.333420] omap_uart.1: ttyO1 at MMIO 0x48022000 (irq = 73) is a OMAP UART1
[ 1.342037] omap_uart.2: ttyO2 at MMIO 0x48024000 (irq = 74) is a OMAP UART2
[ 1.350535] omap_uart.3: ttyO3 at MMIO 0x481a6000 (irq = 44) is a OMAP UART3
[ 1.359037] omap_uart.4: ttyO4 at MMIO 0x481a8000 (irq = 45) is a OMAP UART4
[ 1.367550] omap_uart.5: ttyO5 at MMIO 0x481aa000 (irq = 46) is a OMAP UART5
[ 1.399189] brd: module loaded
[ 1.414443] loop: module loaded
[ 1.418619] i2c-core: driver [tsl2550] using legacy suspend method
[ 1.425247] i2c-core: driver [tsl2550] using legacy resume method
[ 1.432470] at24 1-0050: 32768 byte 24c256 EEPROM, writable, 1 bytes/write
[ 1.446640] mtdoops: mtd device (mtddev=name/number) must be supplied
[ 1.454718] omap2-nand driver initializing
[ 1.459222] info->phys_base 8000000
[ 1.463040] No NAND device found
[ 1.466895] OneNAND driver initializing
[ 1.523686] davinci_mdio davinci_mdio.0: davinci mdio revision 1.6
[ 1.530291] davinci_mdio davinci_mdio.0: detected phy mask ffffffef
[ 1.538325] davinci_mdio.0: probed
[ 1.541964] davinci_mdio davinci_mdio.0: phy[4]: device 0:04, driver unknown
[ 1.549838] PPP generic driver version 2.4.2
[ 1.555353] PPP BSD Compression module registered
[ 1.560370] PPP Deflate Compression module registered
[ 1.566196] usbcore: registered new interface driver zd1201
[ 1.572575] usbcore: registered new interface driver cdc_ether
[ 1.579174] usbcore: registered new interface driver cdc_eem
[ 1.585566] usbcore: registered new interface driver dm9601
[ 1.591578] cdc_ncm: 04-Aug-2011
[ 1.595393] usbcore: registered new interface driver cdc_ncm
[ 1.601392] Initializing USB Mass Storage driver...
[ 1.607109] usbcore: registered new interface driver usb-storage
[ 1.613492] USB Mass Storage support registered.
[ 1.619229] usbcore: registered new interface driver usbserial
[ 1.625781] USB Serial support registered for generic
[ 1.631520] usbcore: registered new interface driver usbserial_generic
[ 1.638504] usbserial: USB Serial Driver core
[ 1.643428] USB Serial support registered for GSM modem (1-port)
[ 1.650532] usbcore: registered new interface driver option
[ 1.656497] option: v0.7.2:USB Driver for GSM modems
[ 1.662093] USB Serial support registered for Vizzini USB serial port
[ 1.669340] usbcore: registered new interface driver vizzini
[ 1.675388] USB Driver for Vizzini USB serial port: v.1.1
[ 1.682554] dummy_hcd dummy_hcd: USB Host+Gadget Emulator, driver 02 May 2005
[ 1.690208] dummy_hcd dummy_hcd: Dummy host controller
[ 1.695757] dummy_hcd dummy_hcd: new USB bus registered, assigned bus number 2
[ 1.703733] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
[ 1.710963] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ 1.718675] usb usb2: Product: Dummy host controller
[ 1.724000] usb usb2: Manufacturer: Linux 3.2.0 dummy_hcd
[ 1.729740] usb usb2: SerialNumber: dummy_hcd
[ 1.736338] hub 2-0:1.0: USB hub found
[ 1.740364] hub 2-0:1.0: 1 port detected
[ 1.748379] mousedev: PS/2 mouse device common for all mice
[ 1.755467] <<-GTP-INFO->> GTP driver installing...
[ 1.761376] [wds tsc probe]x.min=140,x.max=3946,y.min=319,y.max=3865,x.inverted=0,y.inverted=1
[ 1.771488] input: ti-tsc as /devices/platform/omap/ti_tscadc/tsc/input/input0
[ 1.780157] Backtrace:
[ 1.782859] [<c0017d68>] (dump_backtrace+0x0/0x110) from [<c04a0ec4>] (dump_stack+0x18/0x1c)
[ 1.791854] r6:cf01c000 r5:c069c208 r4:c070b780 r3:00000000
[ 1.797970] [<c04a0eac>] (dump_stack+0x0/0x1c) from [<c065f7c4>] (ft5x0x_ts_init+0x10/0x24)
[ 1.806873] [<c065f7b4>] (ft5x0x_ts_init+0x0/0x24) from [<c000876c>] (do_one_initcall+0x3c/0x180)
[ 1.816348] [<c0008730>] (do_one_initcall+0x0/0x180) from [<c063d884>] (kernel_init+0x9c/0x130)
[ 1.825642] [<c063d7e8>] (kernel_init+0x0/0x130) from [<c0041598>] (do_exit+0x0/0x67c)
[ 1.834057] r5:c063d7e8 r4:00000000
[ 1.838629] rtc-ds1307: probe of 1-0068 failed with error -5
[ 1.845303] forlinx rx8010_probe
[ 1.848972] rtc-rx8010 1-0032: Unable to write register #23
[ 1.854924] i2c i2c-1: probing for rx8010 failed
[ 1.859853] rtc-rx8010: probe of 1-0032 failed with error -121
[ 1.866419] i2c /dev entries driver
[ 1.871684] Linux video capture interface: v2.00
[ 1.877386] usbcore: registered new interface driver uvcvideo
[ 1.883483] USB Video Class driver (1.1.1)
[ 1.889213] OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec
[ 1.896024] Bluetooth: Broadcom Blutonium firmware driver ver 1.2
[ 1.902905] usbcore: registered new interface driver bcm203x
[ 1.908953] Bluetooth: Generic Bluetooth USB driver ver 0.6
[ 1.915295] usbcore: registered new interface driver btusb
[ 1.921290] _regulator_get: deviceless supply vdd_mpu not found, using dummy regulator
[ 1.930624] cpuidle: using governor ladder
[ 1.936134] cpuidle: using governor menu
[ 1.949465] usbcore: registered new interface driver usbhid
[ 1.955449] usbhid: USB HID core driver
[ 1.960973] tiadc tiadc: attached adc driver
[ 1.970708] tlv320aic3x-codec 2-001b: asoc: failed to probe CODEC tlv320aic3x-codec.2-001b: -121
[ 1.980178] asoc: failed to instantiate card AM335X EVM: -121
[ 1.986367] ALSA device list:
[ 1.989527] No soundcards found.
[ 1.993134] oprofile: hardware counters not available
[ 1.998514] oprofile: using timer interrupt.
[ 2.003089] nf_conntrack version 0.5.0 (3944 buckets, 15776 max)
[ 2.010459] ip_tables: (C) 2000-2006 Netfilter Core Team
[ 2.016387] TCP cubic registered
[ 2.019835] NET: Registered protocol family 17
[ 2.024613] can: controller area network core (rev 20090105 abi 8)
[ 2.031347] NET: Registered protocol family 29
[ 2.036108] can: raw protocol (rev 20090105)
[ 2.040638] can: broadcast manager protocol (rev 20090105 t)
[ 2.047213] Bluetooth: RFCOMM TTY layer initialized
[ 2.052435] Bluetooth: RFCOMM socket layer initialized
[ 2.057932] Bluetooth: RFCOMM ver 1.11
[ 2.061917] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[ 2.067580] Bluetooth: BNEP filters: protocol multicast
[ 2.073124] Bluetooth: HIDP (Human Interface Emulation) ver 1.2
[ 2.080252] Registering the dns_resolver key type
[ 2.085442] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
[ 2.093639] ThumbEE CPU extension supported.
[ 2.098303] mux: Failed to setup hwmod io irq -22
[ 2.104691] Power Management for AM33XX family
[ 2.109792] Trying to load am335x-pm-firmware.bin (60 secs timeout)
[ 2.116737] Copied the M3 firmware to UMEM
[ 2.121241] Cortex M3 Firmware Version = 0x181
[ 2.136222] clock: disabling unused clocks to save power
[ 2.145812] Detected MACID=ec:11:27:cf:69:89
[ 2.152535] cpsw: Detected MACID = ec:11:27:cf:69:8b
[ 2.162108] input: gpio-keys as /devices/platform/gpio-keys/input/input1
[ 2.170745] drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
[ 2.178220] Waiting for root device /dev/mmcblk0p2...
描述： 4G emmc DRAM: 256M
