/dev does not have the devices I have configured with initramfs as my root file system

[Allan Wang <aiyuanwang@yahoo.com>]

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Hello, All,

Happy New Year to everyone! 
I am running ppc440epx board which is similar Sequoia board. I have configured a I2C RTC device. From the console debug message, it is working, but I do not see /dev/rtc0 file. My kernel version is 2.6.30.4. I use initramfs as my root file system. Here is my initramfs.txt:
dir /dev 755 0 0
dir /bin 755 1000 1000
dir /proc 755 0 0
slink /bin/sh busybox 777 0 0
file /bin/busybox /home/awang/proj/linux-2.6.30.4/usr/busybox 755 0 0
dir /sys 755 0 0
dir /usr 755 0 0
dir /usr/bin 755 0 0
dir /usr/sbin 755 0 0
dir /sbin 755 0 0
dir /mnt 755 0 0
dir /etc 755 0 0
dir /var 755 0 0
file /init /home/awang/proj/linux-2.6.30.4/usr/init.sh 755 0 0

Here is my init.sh:

#!/bin/sh

/bin/busybox echo " "
/bin/busybox echo "Hello, I am alive!!!!"
busybox mkdir /mnt/flash
busybox mount -t proc /proc /proc
busybox mount -t sysfs none /sys
busybox mount -t jffs2 mtd2 /mnt/flash

busybox sleep  2
/bin/busybox --install -s
#start a shell
ifconfig eth0 192.168.0.201
/bin/sh


Here is my configurations:

RTC kernel configuration:

CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
CONFIG_RTC_DEBUG=y

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y

dts configuration:

 IIC0: i2c@ef600700 {
                                #address-cells = <1>;
                                #size-cells = <0>;
                                compatible = "ibm,iic-440epx", "ibm,iic";
                                reg = <0xef600700 0x00000014>;
                                interrupt-parent = <&UIC0>;
                                interrupts = <0x2 0x4>;
                                rtc@68 {
                                        compatible = "stm,m41t80";
                                        reg = <0x68>;
                                };
                                eeprom0@50 {
                                        compatible = "eeprom";
                                        reg = <0x50>;
                                };
                                eeprom1@54 {
                                        compatible = "eeprom";
                                        reg = <0x54>;
                                };
                        };

The debug messages:

i2c /dev entries driver
rtc-m41t80 1-0068: chip found, driver version 0.05
rtc-m41t80 1-0068: rtc core: registered m41t80 as rtc0
ibm-iic 1ef600700.i2c: using standard (100 kHz) mode
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
TIPC: Activated (version 1.6.4 compiled Jan  3 2010 12:21:35)
NET: Registered protocol family 30
TIPC: Started in single node mode
rtc-m41t80 1-0068: setting system clock to 2010-01-03 19:43:06 UTC (1262547786)

I have struggled for a few days. Thank you very much.

Allan


      

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