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Re: [Qemu-devel] Fwd: Re: [PATCH v4 2/2] Add AT24Cxx I2C EEPROM device m


From: Weng Fan
Subject: Re: [Qemu-devel] Fwd: Re: [PATCH v4 2/2] Add AT24Cxx I2C EEPROM device model
Date: Sat, 18 May 2013 11:01:03 +0800
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2.28) Gecko/20120306 Thunderbird/3.1.20

Thank you for you help.
I can use the at24 device.
And i can see the device in monitor model:
info qtree
 type i2c-bus
      dev: at24, id ""
        drive = eeprom
        logical_block_size = 512
        physical_block_size = 512
        min_io_size = 0
        opt_io_size = 0
        bootindex = -1
        discard_granularity = 0
        device = 0
        size = 65536
        address = 80
But I have another question.

How can i test the eeprom device at24?

My qemu command:
qemu-system-arm -drive file=test.img,if=none,id=eeprom -device at24,address=0x4c,drive=eeprom -M versatilepb -nographic -kernel zImage -initrd initrd.img -append "root=linuxrc console=ttyAMA0,115200"

The kernel has compiled at24.c driver.

In virtual os,i can't see the device at24.
If i want write/read date in at24 device,what should i do?

I'm waiting for you help,thank you.


于 2013-5-16 0:10, Jan Kiszka 写道:
On 2013-05-15 08:20, Weng Fan wrote:
Hi.
I want to use this patch for qemu-system-arm.
But an error occurred during initialization of the i2c device.

The error message is :

qemu-system-arm: drive property not set
qemu-system-arm: Initialization of device at24 failed

The command is:
qemu-system-arm -M versatilepb -nographic -kernel zImage -initrd
initrd.img -append "root=linuxrc console=ttyAMA0,115200"

You command line is incomplete, no mentioning of the -drive at24. The
intended usage is:

-drive file=/path/to/image,if=none,id=eeprom -device at24,drive=eeprom

You can also specify the desired at24xxx type explicitly, e.g. at24c256
for the 256K model. Otherwise the type is derived from the image size.

Jan


--
--------------
Best Regards
--------------------------------------------------
Weng Fan
Development Dept.I
Nanjing Fujitsu Nanda Software Tech. Co., Ltd.(FNST)
No. 6 Wenzhu Road, Nanjing, 210012, China
TEL:+86+25-86630566-8222
address@hidden
http://www.fujitsu.com/cn/fnst/
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