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
--
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Best Regards
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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
Mail：wengfan-f...@cn.fujitsu.com
http://www.fujitsu.com/cn/fnst/
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