DAVINCI I2C Warning： timeout waiting for bus ready

hi ,experts:

I am using DM355 with kernel 2.6.10(MVL4.0).

I have connected a tsc2007 to the I2C.

these are my driver code:

static int tsc2007_read (struct tsc2007 *data, u8 cmd)

{

u8 command_byte;

u16 value = 0;

u32 stat = 0;

struct i2c_client *new_client = data->client;

// Command byte to be sent based on the structure data values 

command_byte = cmd;

stat = i2c_master_send (new_client, &command_byte, BYTES_TO_TX);

if (stat != BYTES_TO_TX)

printk ("unable to send %#x command: %s\n",

command_byte, __FUNCTION__);

// Receive 2 bytes of data for 12 bit mode and 1 byte for 8 bit mode 

stat = i2c_master_recv (new_client, (u8 *) & value, BYTES_TO_RX);

if (stat != BYTES_TO_RX)

printk ("unable to receive data: %s\n", __FUNCTION__);

return value;

}

static int tsc2007_write (struct tsc2007 *data, u8 cmd)

{

u8 command_byte;

u32 stat = 0;

struct i2c_client *new_client = data->client;

// Command byte to be sent based on the structure data values 

command_byte = cmd;

stat = i2c_master_send (new_client, &command_byte, BYTES_TO_TX);

if (stat != BYTES_TO_TX)

{

printk ("unable to send %#x command: %s\n",

command_byte, __FUNCTION__);

return -1;

}

return stat;

}

actually it is from TI's driver.

However, when I write to tsc2007,it responses correctly .

But when I read it, there is a error:

DAVINCI I2C Warning： timeout waiting for bus ready

I have googled it, but found none is for kernel2.6.10. How can i fix this bug? or can someone show me where the patch is?

thanks.