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[硬件交流] eMMC驱动无法正常加载

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eMMC驱动无法正常加载

发表于 2021-1-5 14:10:53      浏览:6473 | 回复:2        打印      只看该作者   [复制链接] 楼主
本帖最后由 jeffwin2018 于 2021-1-5 14:23 编辑

各位,请教个问题,我们基于Firefly 3308开发版自己做了一块板子,唯一区别就是使用了RK816 PMIC (Firefly的板子用的是离散IC)。eMMC硬件跟Firefly相同,软件上eMMC部分也是跟Firefly的配置基本相同,结果eMMC驱动没有正常加载,报如下的错误。量了一下eMMC芯片的供电也没有问题,是3.3V。不知道哪里出现了问题,希望各位高手帮忙解答。感谢!

[    0.629433] dwmmc_rockchip ff490000.dwmmc: No default pinctrl state
[    0.629501] dwmmc_rockchip ff490000.dwmmc: No off pinctrl state
[    0.629631] dwmmc_rockchip ff490000.dwmmc: IDMAC supports 32-bit address mode.
[    0.629685] dwmmc_rockchip ff490000.dwmmc: Using internal DMA controller.
[    0.629708] dwmmc_rockchip ff490000.dwmmc: Version ID is 270a
[    0.629782] dwmmc_rockchip ff490000.dwmmc: DW MMC controller at irq 23,32 bit host data width,256 deep fifo
[    0.629867] dwmmc_rockchip ff490000.dwmmc: No vmmc regulator found
[    0.629884] dwmmc_rockchip ff490000.dwmmc: No vqmmc regulator found
[    0.640555] mmc_host mmc1: Bus speed (slot 0) = 400000Hz (slot req 400000Hz, actual 400000HZ div
                                                                                                    [    0.758522] mmc1: MAN_BKOPS_EN bit is not set
[    0.764386] mmc_host mmc1: Bus speed (slot 0) = 147456000Hz (slot req 150000000Hz, actual 147456000HZ div = 0)
[    0.765279] dwmmc_rockchip ff490000.dwmmc: All phases bad!
[    0.765299] mmc1: tuning execution failed
[    0.765317] mmc1: error -5 whilst initialising MMC card
[    0.777577] mmc_host mmc1: Bus speed (slot 0) = 200000Hz (slot req 200000Hz, actual 200000HZ div = 0)
[    0.838055] mmc1: MAN_BKOPS_EN bit is not set
[    0.845878] mmc_host mmc1: Bus speed (slot 0) = 147456000Hz (slot req 150000000Hz, actual 147456000HZ div = 0)
[    0.846791] dwmmc_rockchip ff490000.dwmmc: All phases bad!
[    0.846813] mmc1: tuning execution failed
[    0.846831] mmc1: error -5 whilst initialising MMC card
[    0.859599] mmc_host mmc1: Bus speed (slot 0) = 100000Hz (slot req 100000Hz, actual 100000HZ div = 0)
[    0.948216] mmc1: MAN_BKOPS_EN bit is not set
[    0.962585] mmc_host mmc1: Bus speed (slot 0) = 147456000Hz (slot req 150000000Hz, actual 147456000HZ div = 0)
[    0.963747] dwmmc_rockchip ff490000.dwmmc: All phases bad!
[    0.963788] mmc1: tuning execution failed
[    0.963823] mmc1: error -5 whilst initialising MMC card


emmc dts 和完整kernel log如下:&emmc {
        bus-width = <8>;
        cap-mmc-highspeed;
        mmc-hs200-1_8v;
        supports-emmc;
        disable-wp;
        non-removable;
        num-slots = <1>;
        status = "disabled";
};

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.4.143 (jeff@jeff-VirtualBox) (gcc version 6.3.1 20170404 (Linaro GCC 6.3-2017.05) )
[    0.000000] Boot CPU: AArch64 Processor [410fd042]
[    0.000000] earlycon: Early serial console at MMIO32 0xff0c0000 (options '')
[    0.000000] bootconsole [uart0] enabled
[    0.000000] Reserved memory: failed to reserve memory for node 'drm-logo@00000000': base 0x0000000000000000, size 0 MiB
[    0.000000] psci: probing for conduit method from DT.
[    0.000000] psci: PSCIv1.0 detected in firmware.
[    0.000000] psci: Using standard PSCI v0.2 function IDs
[    0.000000] psci: MIGRATE_INFO_TYPE not supported.
[    0.000000] PERCPU: Embedded 18 pages/cpu @ffffffc01ff55000 s35992 r8192 d29544 u73728
[    0.000000] Detected VIPT I-cache on CPU0
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 128520
[    0.000000] Kernel command line: storagemedia=emmc androidboot.storagemedia=emmc androidboot.mode=normal  androidboot.slot_suffix= androidboot.serialno=c3d9b8674f4b94f6  rootwait earlycon=uart8250,mmio32,0xff0c0000 swiotlb=1 console=ttyFIQ0 root=PARTUUID=614e0000-0000 rootfstype=squashfs snd_aloop.index=7
[    0.000000] PID hash table entries: 2048 (order: 2, 16384 bytes)
[    0.000000] Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
[    0.000000] Inode-cache hash table entries: 32768 (order: 6, 262144 bytes)
[    0.000000] software IO TLB [mem 0x1fe51000-0x1fe91000] (0MB) mapped at [ffffffc01fe51000-ffffffc01fe90fff]
[    0.000000] Memory: 504440K/522240K available (4862K kernel code, 380K rwdata, 1680K rodata, 320K init, 467K bss, 17800K reserved, 0K cma-reserved)
[    0.000000] Virtual kernel memory layout:
[    0.000000]     modules : 0xffffff8000000000 - 0xffffff8008000000   (   128 MB)
[    0.000000]     vmalloc : 0xffffff8008000000 - 0xffffffbdbfff0000   (   246 GB)
[    0.000000]       .init : 0xffffff80086f0000 - 0xffffff8008740000   (   320 KB)
[    0.000000]       .text : 0xffffff8008080000 - 0xffffff8008540000   (  4864 KB)
[    0.000000]     .rodata : 0xffffff8008540000 - 0xffffff80086f0000   (  1728 KB)
[    0.000000]       .data : 0xffffff8008740000 - 0xffffff800879f008   (   381 KB)
[    0.000000]     fixed   : 0xffffffbffe7fd000 - 0xffffffbffec00000   (  4108 KB)
[    0.000000]     PCI I/O : 0xffffffbffee00000 - 0xffffffbfffe00000   (    16 MB)
[    0.000000]     memory  : 0xffffffc000200000 - 0xffffffc020000000   (   510 MB)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
[    0.000000] Preemptible hierarchical RCU implementation.
[    0.000000]  Build-time adjustment of leaf fanout to 64.
[    0.000000] NR_IRQS:64 nr_irqs:64 0
[    0.000000] GIC: Using split EOI/Deactivate mode
[    0.000000] Architected cp15 timer(s) running at 24.00MHz (phys).
[    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x588fe9dc0, max_idle_ns: 440795202592 ns
[    0.000006] sched_clock: 56 bits at 24MHz, resolution 41ns, wraps every 4398046511097ns
[    0.001777] Calibrating delay loop (skipped), value calculated using timer frequency.. 48.00 BogoMIPS (lpj=24000)
[    0.002729] pid_max: default: 32768 minimum: 301
[    0.003296] Mount-cache hash table entries: 1024 (order: 1, 8192 bytes)
[    0.003907] Mountpoint-cache hash table entries: 1024 (order: 1, 8192 bytes)
[    0.005422] sched-energy: CPU device node has no sched-energy-costs
[    0.006040] Invalid sched_group_energy for CPU0
[    0.006458] CPU0: update cpu_capacity 1024
[    0.006883] ASID allocator initialised with 65536 entries
[    0.016620] Detected VIPT I-cache on CPU1
[    0.016678] Invalid sched_group_energy for CPU1
[    0.016683] CPU1: update cpu_capacity 1024
[    0.016687] CPU1: Booted secondary processor [410fd042]
[    0.019637] Detected VIPT I-cache on CPU2
[    0.019675] Invalid sched_group_energy for CPU2
[    0.019679] CPU2: update cpu_capacity 1024
[    0.019683] CPU2: Booted secondary processor [410fd042]
[    0.022685] Detected VIPT I-cache on CPU3
[    0.022720] Invalid sched_group_energy for CPU3
[    0.022725] CPU3: update cpu_capacity 1024
[    0.022729] CPU3: Booted secondary processor [410fd042]
[    0.022798] Brought up 4 CPUs
[    0.028008] SMP: Total of 4 processors activated.
[    0.028447] CPU: All CPU(s) started at EL2
[    0.028951] Invalid sched_group_energy for CPU3
[    0.029373] Invalid sched_group_energy for Cluster3
[    0.029820] Invalid sched_group_energy for CPU2
[    0.030249] Invalid sched_group_energy for Cluster2
[    0.030697] Invalid sched_group_energy for CPU1
[    0.031113] Invalid sched_group_energy for Cluster1
[    0.031571] Invalid sched_group_energy for CPU0
[    0.031987] Invalid sched_group_energy for Cluster0
[    0.033029] devtmpfs: initialized
[    0.051820] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 1911260446275000 ns
[    0.052742] futex hash table entries: 1024 (order: 4, 65536 bytes)
[    0.053754] pinctrl core: initialized pinctrl subsystem
[    0.055318] NET: Registered protocol family 16
[    0.060825] cpuidle: using governor menu
[    0.061218] Registered FIQ tty driver
[    0.061831] vdso: 2 pages (1 code @ ffffff8008546000, 1 data @ ffffff8008744000)
[    0.062541] hw-breakpoint: found 6 breakpoint and 4 watchpoint registers.
[    0.063407] DMA: preallocated 256 KiB pool for atomic allocations
[    0.065696] persistent_ram: found existing invalid buffer, size 1108344864, start 1141121056
[    0.066524] persistent_ram: found existing invalid buffer, size 537945783, start 26295
[    0.067780] console [pstore-1] enabled
[    0.068132] pstore: Registered ramoops as persistent store backend
[    0.068716] ramoops: attached 0xf0000@0x110000, ecc: 0/0
[    0.086309] fiq debugger fiq mode enabled
[[    0.087119] console [ttyFIQ0] enabled
    0.087119] console [ttyFIQ0] enabled
[    0.087794] bootconsole [uart0] disabled
[    0.087794] bootconsole [uart0] disabled
[    0.088440] Registered fiq debugger ttyFIQ0
WARNING: suspend_mode_handler: Not support call: 0x4
[    0.100692] vcc_phy supplying 0uV
[    0.101478] vbus_host supplying 0uV
[    0.101849] vcc_sys supplying 4000000uV
[    0.102313] usbcore: registered new interface driver usbfs
[    0.102418] usbcore: registered new interface driver hub
[    0.102565] usbcore: registered new device driver usb
[    0.103867] Advanced Linux Sound Architecture Driver Initialized.
[    0.104590] Bluetooth: Core ver 2.21
[    0.104659] NET: Registered protocol family 31
[    0.104671] Bluetooth: HCI device and connection manager initialized
[    0.104691] Bluetooth: HCI socket layer initialized
[    0.104707] Bluetooth: L2CAP socket layer initialized
[    0.104743] Bluetooth: SCO socket layer initialized
[    0.105891] rockchip-cpuinfo cpuinfo: Serial         : 50fcc4f0ffd11e12
[    0.106450] clocksource: Switched to clocksource arch_sys_counter
[    0.109006] thermal thermal_zone1: power_allocator: sustainable_power will be estimated
[    0.109344] NET: Registered protocol family 2
[    0.110081] TCP established hash table entries: 4096 (order: 3, 32768 bytes)
[    0.110172] TCP bind hash table entries: 4096 (order: 4, 65536 bytes)
[    0.110269] TCP: Hash tables configured (established 4096 bind 4096)
[    0.110370] UDP hash table entries: 256 (order: 1, 8192 bytes)
[    0.110401] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
[    0.110686] NET: Registered protocol family 1
[    0.111792] hw perfevents: enabled with armv8_cortex_a53 PMU driver, 7 counters available
[    0.123297] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.126457] io scheduler noop registered (default)
[    0.127676] phy phy-ff008000.syscon:usb2-phy@100.0: Failed to get VBUS supply regulator
[    0.131906] dma-pl330 ff2c0000.dma-controller: Loaded driver for PL330 DMAC-241330
[    0.131953] dma-pl330 ff2c0000.dma-controller:       DBUFF-32x8bytes Num_Chans-6 Num_Peri-12 Num_Events-12
[    0.134426] dma-pl330 ff2d0000.dma-controller: Loaded driver for PL330 DMAC-241330
[    0.134498] dma-pl330 ff2d0000.dma-controller:       DBUFF-128x8bytes Num_Chans-8 Num_Peri-20 Num_Events-16
[    0.134879] rockchip-pvtm ff000000.grf:pmu-pvtm: failed to get rst 0 pmu
[    0.135038] rockchip-pvtm ff00c000.syscon:pvtm: failed to get rst 0 core
[    0.135862] Serial: 8250/16550 driver, 5 ports, IRQ sharing disabled
[    0.138302] ff0e0000.serial: ttyS4 at MMIO 0xff0e0000 (irq = 12, base_baud = 5078125) is a 16550A
[    0.140200] [drm] Initialized drm 1.1.0 20060810
[    0.140394] random: nonblocking pool is initialized
[    0.142421] Unable to detect cache hierarchy for CPU 0
[    0.142976] Rockchip WiFi SYS interface (V1.00) ...
[    0.143368] ff400000.usb supply vusb_d not found, using dummy regulator
[    0.143490] ff400000.usb supply vusb_a not found, using dummy regulator
[    0.256521] dwc2 ff400000.usb: EPs: 10, dedicated fifos, 972 entries in SPRAM
[    0.257068] dwc2 ff400000.usb: DWC OTG Controller
[    0.257121] dwc2 ff400000.usb: new USB bus registered, assigned bus number 1
[    0.257170] dwc2 ff400000.usb: irq 19, io mem 0xff400000
[    0.258192] hub 1-0:1.0: USB hub found
[    0.258247] hub 1-0:1.0: 1 port detected
[    0.481943] phy phy-ff008000.syscon:usb2-phy@100.0: charger = USB_SDP_CHARGER
[    0.482142] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    0.482171] ehci-platform: EHCI generic platform driver
[    0.486029] ehci-platform ff440000.usb: EHCI Host Controller
[    0.486086] ehci-platform ff440000.usb: new USB bus registered, assigned bus number 2
[    0.486251] ehci-platform ff440000.usb: irq 20, io mem 0xff440000
[    0.491485] ehci-platform ff440000.usb: USB 2.0 started, EHCI 1.00
[    0.492434] hub 2-0:1.0: USB hub found
[    0.492529] hub 2-0:1.0: 1 port detected
[    0.493105] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    0.493203] ohci-platform: OHCI generic platform driver
[    0.493652] ohci-platform ff450000.usb: Generic Platform OHCI controller
[    0.493704] ohci-platform ff450000.usb: new USB bus registered, assigned bus number 3
[    0.493853] ohci-platform ff450000.usb: irq 21, io mem 0xff450000
[    0.549367] hub 3-0:1.0: USB hub found
[    0.549425] hub 3-0:1.0: 1 port detected
[    0.550721] i2c /dev entries driver
[    0.552526] rk808 0-001a: Pmic Chip id: 0x8160
[    0.552927] rk808 0-001a: source: on=0x40, off=0x00
[    0.558037] rk808-regulator rk808-regulator: there is no dvs0 gpio
[    0.558146] rk808-regulator rk808-regulator: there is no dvs1 gpio
[    0.558400] DCDC_REG1: supplied by vcc_sys
[    0.559976] DCDC_REG2: supplied by vcc_sys
[    0.561416] DCDC_REG3: supplied by vcc_sys
[    0.562700] DCDC_REG4: supplied by vcc_sys
[    0.563854] LDO_REG1: supplied by vcc_io
[    0.565491] LDO_REG2: supplied by vcc_io
[    0.567132] LDO_REG3: supplied by vcc_io
[    0.568936] LDO_REG4: supplied by vcc_sys
[    0.569283] ldo4: Bringing 3300000uV into 1800000-1800000uV
[    0.570068] LDO_REG5: supplied by vcc_sys
[    0.571308] LDO_REG6: supplied by vcc_sys
[    0.572861] rk816-battery rk816-battery: fb_temperature missing!
[    0.572901] rk816-battery rk816-battery: energy_mode missing!
[    0.572929] rk816-bat: not support dc
[    0.573523] thermal thermal_zone2: power_allocator: sustainable_power will be estimated
[    0.577999] rk816-bat: save fcc: 2750
[    0.578815] rk816-bat: first on: dsoc=30, rsoc=30 cap=814, fcc=2750, ov=3747
[    0.584665] rk816-bat: receive extcon notifier event: OTG OFF...
[    0.584689] rk816-bat: otg5v is off yet, ignore..
[    0.584707] rk816-bat: receive extcon notifier event: USB...
[    0.584734] rk816-bat: register extcon evt notifier
[    0.585264] rk816-bat: set charger type: USB, current: input=450, chrg=1800
[    0.586212] rk816-bat: set charger type: NONE DC, current: input=450, chrg=1800
[    0.589104] rk816-bat: driver version 1.2
[    0.591411] input: rk8xx_pwrkey as /devices/platform/ff040000.i2c/i2c-0/0-001a/input/input0
[    0.594998] rk808-rtc rk808-rtc: rtc core: registered rk808-rtc as rtc0
[    0.595612] rk3x-i2c ff040000.i2c: Initialized RK3xxx I2C bus at ffffff8008866000
[    0.599293] rk_tsadcv2_temp_to_code: Invalid conversion table: code=4095, temperature=2147483647
[    0.599597] rockchip-thermal ff1f0000.tsadc: tsadc is probed successfully!
[    0.600075] Bluetooth: HCI UART driver ver 2.3
[    0.600100] Bluetooth: HCI UART protocol H4 registered
[    0.600111] Bluetooth: HCI UART protocol LL registered
[    0.600388] cpu cpu0: leakage=19
[    0.600715] cpu cpu0: Failed to get pvtm
[    0.602254] cpu cpu0: l=0 h=55000 hyst=5000 l_limit=1200000000 h_limit=1008000000
[    0.604204] Synopsys Designware Multimedia Card Interface Driver
[    0.605352] dwmmc_rockchip ff480000.dwmmc: No default pinctrl state
[    0.605393] dwmmc_rockchip ff480000.dwmmc: No off pinctrl state
[    0.605415] dwmmc_rockchip ff480000.dwmmc: num-slots property not found, assuming 1 slot is available
[    0.605597] dwmmc_rockchip ff480000.dwmmc: IDMAC supports 32-bit address mode.
[    0.605649] dwmmc_rockchip ff480000.dwmmc: Using internal DMA controller.
[    0.605677] dwmmc_rockchip ff480000.dwmmc: Version ID is 270a
[    0.605759] dwmmc_rockchip ff480000.dwmmc: DW MMC controller at irq 22,32 bit host data width,256 deep fifo
[    0.617555] mmc_host mmc0: Bus speed (slot 0) = 400000Hz (slot req 400000Hz, actual 400000HZ div = 0)
[    0.628613] vcc_1v8: voltage operation not allowed
[    0.628636] vcc_1v8: voltage operation not allowed
[    0.628647] set vqmmc to 3.3v, ret=-1
[    0.629196] dwmmc_rockchip ff480000.dwmmc: 1 slots initialized
[    0.629433] dwmmc_rockchip ff490000.dwmmc: No default pinctrl state
[    0.629501] dwmmc_rockchip ff490000.dwmmc: No off pinctrl state
[    0.629631] dwmmc_rockchip ff490000.dwmmc: IDMAC supports 32-bit address mode.
[    0.629685] dwmmc_rockchip ff490000.dwmmc: Using internal DMA controller.
[    0.629708] dwmmc_rockchip ff490000.dwmmc: Version ID is 270a
[    0.629782] dwmmc_rockchip ff490000.dwmmc: DW MMC controller at irq 23,32 bit host data width,256 deep fifo
[    0.629867] dwmmc_rockchip ff490000.dwmmc: No vmmc regulator found
[    0.629884] dwmmc_rockchip ff490000.dwmmc: No vqmmc regulator found
[    0.640555] mmc_host mmc1: Bus speed (slot 0) = 400000Hz (slot req 400000Hz, actual 400000HZ div
                                                                                                    [    0.758522] mmc1: MAN_BKOPS_EN bit is not set
[    0.764386] mmc_host mmc1: Bus speed (slot 0) = 147456000Hz (slot req 150000000Hz, actual 147456000HZ div = 0)
[    0.765279] dwmmc_rockchip ff490000.dwmmc: All phases bad!
[    0.765299] mmc1: tuning execution failed
[    0.765317] mmc1: error -5 whilst initialising MMC card
[    0.777577] mmc_host mmc1: Bus speed (slot 0) = 200000Hz (slot req 200000Hz, actual 200000HZ div = 0)
[    0.838055] mmc1: MAN_BKOPS_EN bit is not set
[    0.845878] mmc_host mmc1: Bus speed (slot 0) = 147456000Hz (slot req 150000000Hz, actual 147456000HZ div = 0)
[    0.846791] dwmmc_rockchip ff490000.dwmmc: All phases bad!
[    0.846813] mmc1: tuning execution failed
[    0.846831] mmc1: error -5 whilst initialising MMC card
[    0.859599] mmc_host mmc1: Bus speed (slot 0) = 100000Hz (slot req 100000Hz, actual 100000HZ div = 0)
[    0.948216] mmc1: MAN_BKOPS_EN bit is not set
[    0.962585] mmc_host mmc1: Bus speed (slot 0) = 147456000Hz (slot req 150000000Hz, actual 147456000HZ div = 0)
[    0.963747] dwmmc_rockchip ff490000.dwmmc: All phases bad!
[    0.963788] mmc1: tuning execution failed
[    0.963823] mmc1: error -5 whilst initialising MMC card
[    2.182454] dwmmc_rockchip ff4a0000.dwmmc: Busy; trying anyway
[    2.182490] mmc_host mmc2: Timeout sending command (cmd 0x202000 arg 0x0 status 0x0)
[    2.195559] mmc_host mmc2: Bus speed (slot 0) = 300000Hz (slot req 300000Hz, actual 300000HZ div = 0)
[    3.702502] vendor storage:20160801 ret = -1
[    3.713452] dwmmc_rockchip ff4a0000.dwmmc: Busy; trying anyway
[    3.713480] mmc_host mmc2: Timeout sending command (cmd 0x202000 arg 0x0 status 0x0)
[    3.726572] mmc_host mmc2: Bus speed (slot 0) = 200000Hz (slot req 200000Hz, actual 200000HZ div = 0)
[    5.246456] dwmmc_rockchip ff4a0000.dwmmc: Busy; trying anyway
[    5.246491] mmc_host mmc2: Timeout sending command (cmd 0x202000 arg 0x0 status 0x0)
[    5.259577] mmc_host mmc2: Bus speed (slot 0) = 100000Hz (slot req 100000Hz, actual 100000HZ div = 0)
[    5.596271] rk816-bat: changed: dsoc=30, rsoc=30, v=4639, ov=3747 c=0, cap=814, f=2750, st=cc cv, hotdie=0
[    5.596335] rk816-bat: dl=30, rl=30, v=3238, halt=0, halt_n=0, max=0, init=0, sw=0, calib=0, below0=0, force=0
[    5.720606] ret 1024
[    5.722133] ALSA device list:
[    5.722190]   #7: Loopback 1
[    5.722700] Waiting for root device PARTUUID=614e0000-0000...
[    6.783459] dwmmc_rockchip ff4a0000.dwmmc: Busy; trying anyway
[    6.783492] mmc_host mmc2: Timeout sending command (cmd 0x202000 arg 0x0 status 0x0)


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发表于 2021-1-6 01:30:39        只看该作者  沙发
已经搞定,原因是dts里面eMMC的配置写成1.8V了。
mmc-hs200-1_8v; ->mmc-hs200-3_3v;就可以了。:)
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发表于 2021-6-28 11:37:31        只看该作者  板凳
你好,请问更好emmc后,除了电压外,还需要修改什么吗?我这换了个emmc后,找不到rootfs
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