我正在尝试从Glomation为GESBC-9G20w编译内核。该板围绕AT91SAM9G20构建。我的问题是我无法使用内核检测到SD卡。他们提供的演示内核有效，所以我知道硬件很好，但我需要更新的内核版本。
我可以提供更多信息，但我尝试只为初学者提供重要的东西。
我正在使用https://github.com/linux4sam/linux-at91
中的内核源代码内核配置选项...
#
# AT91SAM9G20 Board Type
#
CONFIG_MACH_AT91SAM9G20EK=y
CONFIG_MACH_AT91SAM9G20EK_2MMC=y
CONFIG_MACH_CPU9G20=y
CONFIG_MACH_ACMENETUSFOXG20=y
CONFIG_MACH_PORTUXG20=y
CONFIG_MACH_STAMP9G20=y
CONFIG_MACH_PCONTROL_G20=y
CONFIG_MACH_GSIA18S=y
CONFIG_MACH_SNAPPER_9260=y
CONFIG_MMC=y
# CONFIG_MMC_DEBUG is not set
# CONFIG_MMC_UNSAFE_RESUME is not set
# CONFIG_MMC_CLKGATE is not set
#
# MMC/SD/SDIO Card Drivers
#
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_MINORS=8
CONFIG_MMC_BLOCK_BOUNCE=y
# CONFIG_SDIO_UART is not set
# CONFIG_MMC_TEST is not set
#
# MMC/SD/SDIO Host Controller Drivers
#
# CONFIG_MMC_SDHCI is not set
# CONFIG_MMC_SDHCI_PXAV3 is not set
# CONFIG_MMC_SDHCI_PXAV2 is not set
# CONFIG_MMC_AT91 is not set
CONFIG_MMC_ATMELMCI=y
# CONFIG_MMC_SPI is not set
# CONFIG_MMC_DW is not set
# CONFIG_MMC_VUB300 is not set
# CONFIG_MMC_USHC is not set
# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y
启动日志...
NET: Registered protocol family 17
input: gpio-keys as /devices/platform/gpio-keys/input/input0
rtc-at91sam9 rtc-at91sam9.0: setting system clock to 1970-01-01 00:16:52 UTC (1012)
atmel_mci atmel_mci: version: 0x210
atmel_mci atmel_mci: no DMA channel available
atmel_mci atmel_mci: using PDC
atmel_mci atmel_mci: Atmel MCI controller at 0xfffa8000 irq 25, 2 slots
ALSA device list:
No soundcards found.
Waiting 5sec before mounting root device...
usb 1-1: new full-speed USB device number 2 using at91_ohci
usb 1-2: new full-speed USB device number 3 using at91_ohci
usb-storage 1-2:1.0: USB Mass Storage device detected
scsi0 : usb-storage 1-2:1.0
scsi 0:0:0:0: Direct-Access 2.0 2.0 5.00 PQ: 0 ANSI: 2
sd 0:0:0:0: [sda] 7968768 512-byte logical blocks: (4.08 GB/3.79 GiB)
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 0b 00 00 08
sd 0:0:0:0: [sda] No Caching mode page present
sd 0:0:0:0: [sda] Assuming drive cache: write through
sd 0:0:0:0: [sda] No Caching mode page present
sd 0:0:0:0: [sda] Assuming drive cache: write through
sda: sda1
sd 0:0:0:0: [sda] No Caching mode page present
sd 0:0:0:0: [sda] Assuming drive cache: write through
sd 0:0:0:0: [sda] Attached SCSI removable disk
EXT4-fs (sda1): mounting ext3 file system using the ext4 subsystem
EXT4-fs (sda1): warning: mounting unchecked fs, running e2fsck is recommended
EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null)
VFS: Mounted root (ext3 filesystem) on device 8:1.
devtmpfs: mounted
Freeing unused kernel memory: 152K (c03ee000 - c0414000)
...但是当我查看/ dev时，没有mmcblk设备。
有什么想法吗？ 谢谢！