大佬们，我用的是荔枝派nano，用tf卡来启动。我的内核是自己参考官方wiki上那个config自己添加了一些内容后编译出来的。但我自己编译的设备树和zImage总是有问题，不是卡在starting kernel就是卡在waiting for root device /dev/mmcblk0p2。
现在就挺想砸电脑的。卡在starting kernel勉勉强强规避过去了这个错误，但是又**卡在mmcblk0p2那里。通过控制变量法交叉替换了设备树和zImage后我把问题定位了在我自己编译的内核上。反反复复编译内核，从昨天晚上3点多到现在，本来不想麻烦辛苦各位的但是小弟实在能力有限，实在不知道我错在了哪里。
我在uboot输了下mmc part，发现分区是正确加载的，但是不知道为什么进入kernel后就会卡在mmcblk0p2那里，求各位大神指点指点！
分享下我的.config和启动log
U-Boot SPL 2018.01-05679-g013ca457fd (May 22 2021 - 16:34:18)
DRAM: 32 MiB
Trying to boot from MMC1
U-Boot 2018.01-05679-g013ca457fd (May 22 2021 - 16:34:18 +0800) Allwinner Techny
CPU: Allwinner F Series (SUNIV)
Model: Lichee Pi Nano
DRAM: 32 MiB
MMC: SUNXI SD/MMC: 0
*** Warning - bad CRC, using default environment
In: serial@1c25000
Out: serial@1c25000
Err: serial@1c25000
Net: No ethernet found.
starting USB...
No controllers found
Hit any key to stop autoboot: 0
switch to partitions #0, OK
mmc0 is current device
Scanning mmc 0:1...
Found U-Boot script /boot.scr
reading /boot.scr
280 bytes read in 14 ms (19.5 KiB/s)
## Executing script at 80c50000
reading suniv-f1c100s-licheepi-nano.dtb
6072 bytes read in 31 ms (190.4 KiB/s)
reading zImage
6142928 bytes read in 316 ms (18.5 MiB/s)
## Flattened Device Tree blob at 80c00000
Booting using the fdt blob at 0x80c00000
Loading Device Tree to 816fb000, end 816ff7b7 ... OK
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 5.8.13myversion (bakamitai@bakamitai-X555LI) (arm-1
[ 0.000000] CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=0005317f
[ 0.000000] CPU: VIVT data cache, VIVT instruction cache
[ 0.000000] OF: fdt: Machine model: Lichee Pi Nano
[ 0.000000] Memory policy: Data cache writeback
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000080000000-0x0000000081ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000080000000-0x0000000081ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000080000000-0x0000000081ffffff]
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 8128
[ 0.000000] Kernel command line: console=tty0 console=ttyS0,115200 panic=5 rw
[ 0.000000] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes, li)
[ 0.000000] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes, line)
[ 0.000000] mem auto-init: stack:off, heap alloc:on, heap free:off
[ 0.000000] Memory: 16744K/32768K available (9216K kernel code, 725K rwdata,)
[ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] ftrace: allocating 30117 entries in 59 pages
[ 0.000000] ftrace: allocated 59 pages with 5 groups
[ 0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[ 0.000000] random: get_random_bytes called from start_kernel+0x374/0x5a0 wi0
[ 0.000048] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 8947s
[ 0.000124] clocksource: timer: mask: 0xffffffff max_cycles: 0xffffffff, maxs
[ 0.000925] Console: colour dummy device 80x30
[ 0.001994] printk: console [tty0] enabled
[ 0.002171] Calibrating delay loop... 203.16 BogoMIPS (lpj=1015808)
[ 0.070340] pid_max: default: 32768 minimum: 301
[ 0.070822] LSM: Security Framework initializing
[ 0.071055] Yama: becoming mindful.
[ 0.071861] AppArmor: AppArmor initialized
[ 0.072526] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, line)
[ 0.072673] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes,)
[ 0.075899] CPU: Testing write buffer coherency: ok
[ 0.078589] Setting up static identity map for 0x80100000 - 0x80100058
[ 0.086113] devtmpfs: initialized
[ 0.095328] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, ms
[ 0.095530] futex hash table entries: 256 (order: -1, 3072 bytes, linear)
[ 0.096286] pinctrl core: initialized pinctrl subsystem
[ 0.100993] NET: Registered protocol family 16
[ 0.103094] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.104659] audit: initializing netlink subsys (disabled)
[ 0.107402] cpuidle: using governor ladder
[ 0.107527] cpuidle: using governor menu
[ 0.110383] audit: type=2000 audit(0.100:1): state=initialized audit_enabled1
[ 0.174728] fbcon: Taking over console
[ 0.179510] SCSI subsystem initialized
[ 0.180920] usbcore: registered new interface driver usbfs
[ 0.181250] usbcore: registered new interface driver hub
[ 0.181618] usbcore: registered new device driver usb
[ 0.182425] pps_core: LinuxPPS API ver. 1 registered
[ 0.182527] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giom>
[ 0.182688] PTP clock support registered
[ 0.185563] NetLabel: Initializing
[ 0.185686] NetLabel: domain hash size = 128
[ 0.185741] NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
[ 0.186090] NetLabel: unlabeled traffic allowed by default
[ 0.187373] clocksource: Switched to clocksource timer
[ 0.438765] VFS: Disk quotas dquot_6.6.0
[ 0.439120] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[ 0.440980] AppArmor: AppArmor Filesystem Enabled
[ 0.487226] NET: Registered protocol family 2
[ 0.490474] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096)
[ 0.490710] TCP established hash table entries: 1024 (order: 0, 4096 bytes, )
[ 0.490860] TCP bind hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.490957] TCP: Hash tables configured (established 1024 bind 1024)
[ 0.491405] UDP hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.491553] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes, linear)
[ 0.492519] NET: Registered protocol family 1
[ 0.492750] NET: Registered protocol family 44
[ 0.494215] NetWinder Floating Point Emulator V0.97 (double precision)
[ 0.498526] Initialise system trusted keyrings
[ 0.498760] Key type blacklist registered
[ 0.499535] workingset: timestamp_bits=30 max_order=13 bucket_order=0
[ 0.525288] jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc.
[ 0.527594] fuse: init (API version 7.31)
[ 0.529716] JFS: nTxBlock = 130, nTxLock = 1046
[ 0.532605] integrity: Platform Keyring initialized
[ 0.800934] Key type asymmetric registered
[ 0.801055] Asymmetric key parser 'x509' registered
[ 0.801302] Block layer SCSI generic (bsg) driver version 0.4 loaded (major )
[ 0.802402] io scheduler mq-deadline registered
[ 0.818856] suniv-f1c100s-pinctrl 1c20800.pinctrl: initialized sunXi PIO drir
[ 1.107335] Serial: 8250/16550 driver, 8 ports, IRQ sharing enabled
[ 1.119631] suniv-f1c100s-pinctrl 1c20800.pinctrl: supply vcc-pe not found, r
[ 1.121824] printk: console [ttyS0] disabled
[ 1.142356] 1c25000.serial: ttyS0 at MMIO 0x1c25000 (irq = 21, base_baud = 6A
[ 1.665349] printk: console [ttyS0] enabled
[ 1.708332] loop: module loaded
[ 1.717782] libphy: Fixed MDIO Bus: probed
[ 1.722126] PPP generic driver version 2.4.2
[ 1.728379] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.735079] ehci-platform: EHCI generic platform driver
[ 1.740837] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 1.747161] ohci-platform: OHCI generic platform driver
[ 1.754340] mousedev: PS/2 mouse device common for all mice
[ 1.760407] i2c /dev entries driver
[ 1.765031] sdhci: Secure Digital Host Controller Interface driver
[ 1.771436] sdhci: Copyright(c) Pierre Ossman
[ 1.776612] suniv-f1c100s-pinctrl 1c20800.pinctrl: supply vcc-pf not found, r
[ 1.787075] ledtrig-cpu: registered to indicate activity on CPUs
[ 1.793778] drop_monitor: Initializing network drop monitor service
[ 1.803488] NET: Registered protocol family 10
[ 1.818790] Segment Routing with IPv6
[ 1.822878] NET: Registered protocol family 17
[ 1.828830] Key type dns_resolver registered
[ 1.834691] registered taskstats version 1
[ 1.839222] Loading compiled-in X.509 certificates
[ 1.871287] Loaded X.509 cert 'Build time autogenerated kernel key: 9e1f01fc'
[ 1.882689] Key type ._fscrypt registered
[ 1.886803] Key type .fscrypt registered
[ 1.890981] Key type fscrypt-provisioning registered
[ 1.899994] Key type encrypted registered
[ 1.904152] AppArmor: AppArmor sha1 policy hashing enabled
[ 1.910445] ima: No TPM chip found, activating TPM-bypass!
[ 1.916155] ima: Allocated hash algorithm: sha1
[ 1.921161] ima: No architecture policies found
[ 1.925978] evm: Initialising EVM extended attributes:
[ 1.931310] evm: security.selinux
[ 1.934683] evm: security.SMACK64
[ 1.938107] evm: security.SMACK64EXEC
[ 1.941810] evm: security.SMACK64TRANSMUTE
[ 1.945931] evm: security.SMACK64MMAP
[ 1.949688] evm: security.apparmor
[ 1.953125] evm: security.ima
[ 1.956117] evm: security.capability
[ 1.959777] evm: HMAC attrs: 0x1
[ 1.982114] suniv-f1c100s-pinctrl 1c20800.pinctrl: supply vcc-pf not found, r
[ 1.993437] suniv-f1c100s-pinctrl 1c20800.pinctrl: supply vcc-pf not found, r
[ 2.006761] Waiting for root device /dev/mmcblk0p2...
[ 3.747393] random: fast init done离线
[ 2.006761] Waiting for root device /dev/mmcblk0p2...
看你日志，都没有生成mmc分区呢
确实啊，但是设备树没问题，我明明配置了mmc在menuconfig里边。很想不通
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请贴出 .config 和 suniv-f1c100s-licheepi-nano.dts
好的
// SPDX-License-Identifier: (GPL-2.0+ OR X11)
/*
* Copyright 2018 Icenowy Zheng <icenowy@aosc.io>
*/
/dts-v1/;
#include "suniv-f1c100s.dtsi"
#include <dt-bindings/gpio/gpio.h>
/ {
model = "Lichee Pi Nano";
compatible = "licheepi,licheepi-nano", "allwinner,suniv-f1c100s";
aliases {
serial0 = &uart0;
};
chosen {
stdout-path = "serial0:115200n8";
};
reg_vcc3v3: vcc3v3 {
compatible = "regulator-fixed";
regulator-name = "vcc3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
};
};
&uart0 {
pinctrl-names = "default";
pinctrl-0 = <&uart0_pe_pins>;
status = "okay";
};
&mmc0 {
vmmc-supply = <®_vcc3v3>;
bus-width = <4>;
broken-cd;
status = "okay";
};dts没有问题，我已经排查过了，问题定位在我编译内核的时候可能有几个关于驱动的选项没配置好
.config被我刚刚删掉了 因为这是个痛苦的回忆...抱歉，我自己再重新配一个新的.config，如果有问题就继续提问，解决了我就发帖填坑吧
谢谢关心！
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@mmcblk0p2
大哥 我还是有问题啊。
我又在内核里边配置了一份，但是很离谱
我在uboot里边mmc part，我的设备真真实实是存在的
=> mmc part
Partition Map for MMC device 0 -- Partition Type: DOS
Part Start Sector Num Sectors UUID Type
1 2048 131072 3347b09d-01 06
2 133120 124602368 3347b09d-02 83但是很曹丹的是，到了内核，又开始了喜闻乐见的waiting for root device
Waiting for root device /dev/mmcblk0p2离线
这里上传一下我的config文件，辛苦各位大哥帮忙检查下
config_20210707-1748.txt
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@mmcblk0p2
你到本站右上角搜一下其他启动日志，一定要出现mmc分区才行的。
我弄到了一个正常的启动日志
[ 1.072757] suniv-f1c100s-pinctrl 1c20800.pinctrl: supply vcc-pf not found, using dummy regulr
[ 1.109572] sunxi-mmc 1c0f000.mmc: initialized, max. request size: 16384 KB
[ 1.220243] Waiting for root device /dev/mmcblk0p2...
[ 1.250442] mmc0: host does not support reading read-only switch, assuming write-enable
[ 1.264089] mmc0: new high speed SDXC card at address aaaa
[ 1.271528] mmcblk0: mmc0:aaaa SC64G 59.5 GiB
[ 1.283130] mmcblk0: p1 p2真是羡慕别人为啥不会碰到这个错误啊，嗟乎
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换张卡试一试?
我也想试，但我手上就这一张卡，
而且我估计卡没问题，因为uboot读得出来
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换张卡试一试?
大哥 我发现好像根本没有加载mmc的驱动
因为我翻了mmc的驱动代码，发现我的启动根本没有输出
不知道为什么，但我实在把mmc编译进去了并且设备树配置正确了啊
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大哥们，我已经破案了，是我自己内核编译选项没配置好。
我在设备树里是这样描述mmc设备的
&mmc0 {
vmmc-supply = <®_vcc3v3>;
bus-width = <4>;
broken-cd;
status = "okay";
};后来我发现reg_vcc3v3这个设备需要vcc3v3，但是vcc3v3并没有在我的设备树中体现。于是我就删掉了
vmmc-supply = <®_vcc3v3>;
后来我发现平时一声不吭的sunxi-mmc终于闪出来™报错了，我才知道问题出在这么一个不起眼的vmmc-supply上
后来发现原来我是在内核里边没有配置
Voltage and Current Regulator Support而我们应该将
Fixed voltage regulator support按Y编译进内核。linux默认是把这个编译成模块的。
真是天坑啊
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还有这种操作.gif
最后，恭喜楼主成功出坑!
谢谢大哥关心啊
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@mmcblk0p2
我配置了fixed voltage regulator support 还是卡在wait root service,,,
肯定还是有问题，别自己折腾了，赶紧去用官方给的东西
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