no tuning point found

单板报no tuning point found错误，在这之前会卡上2~3分钟。

uboot命令执行mmc info正常，

执行mmc dev会报同样的错误

Hobot# mmc info

Device: sdhc@0x48030000

Manufacturer ID: 15

OEM: 100

Name: CJUD4

Serial: 0xc57353c4

Bus Speed: 200000000

Mode : HS200 (200MHz)

Rd Block Len: 512

MMC version 5.1

High Capacity: Yes

Capacity: 59.6 GiB(124993536 sectors)

Bus Width: 4-bit

Erase Group Size: 512 KiB

HC WP Group Size: 8 MiB

User Capacity: 59.6 GiB WRREL

Boot Capacity: 31.9 MiB ENH

RPMB Capacity: 4 MiB ENH

Hobot# mmc list

sdhc@0x48030000: 0 (eMMC)

sdhc@0x48040000: 1

Hobot# mmc

mmc - MMC sub system

Usage:

mmc info - display info of the current MMC device

mmc read addr blk# cnt

mmc write addr blk# cnt

mmc erase blk# cnt

mmc rescan

mmc part - lists available partition on current mmc device

mmc dev [dev] [part] - show or set current mmc device [partition]

mmc list - lists available devices

mmc hwpartition [args...] - does hardware partitioning

arguments (sizes in 512-byte blocks):

[user [enh start cnt] [wrrel {on|off}]] - sets user data area attributes

[gp1|gp2|gp3|gp4 cnt [enh] [wrrel {on|off}]] - general purpose partition

[check|set|complete] - mode, complete set partitioning completed

WARNING: Partitioning is a write-once setting once it is set to complete.

Power cycling is required to initialize partitions after set to complete.

mmc setdsr <value> - set DSR register value

Hobot# mmc dev

no tuning point found

switch to partitions #0, OK

mmc0(part 0) is current device