<4>[14504.070000] in function i2c_ov9640_init I2C: driver for device ov9640.<4>[14504.070000] in function i2c_ov9640_attach_adapter In function i2c_ov9640_attach_adapter.<4>[14504.080000] in function i2c_ov9640_detect_client <6>In funtion i2c_ov9640_detect_client. address=0X30<4>[14504.090000] in function ov9640_write <6>In funtion ov9640_write addr:39 value:f0return 0 <4>[14504.090000] in function ov9640_write <6>In funtion ov9640_write addr:1e value:0return 0 <4>[14504.100000] in function ov9640_write <6>In funtion ov9640_write addr:6b value:3freturn 0 <4>[14504.100000] in function ov9640_write <6>In funtion ov9640_write addr:36 value:49return 0 <4>[14504.100000] in function ov9640_write <6>In funtion ov9640_write addr:12 value:10return 0 <4>[14506.290000] in function ov9640_read <6>In funtion ov9640_read addr:a,value=96<4>[14506.300000] in function i2c_ov9640_detect_client I2C: Probe ov9640 chip..addr=0x30, REV=10, res=0x96<4>[14508.350000] in function ov9640_read <6>In funtion ov9640_read addr:a,value=96<4>[14508.350000] in function i2c_ov9640_detect_client I2C: Probe ov9640 chip..addr=0x30, REV=10, res=0x96<4>[14508.370000] in function i2c_ov9640_attach_adapter In function i2c_ov9640_attach_adapter.<4>[14508.370000] i2c: error: exhausted retries<4>[14508.380000] i2c: msg_num: 0 msg_idx: -2000 msg_ptr: 0<4>[14508.380000] i2c: ICR: 000007e0 ISR: 00000002<4>[14508.380000] i2c: log: [00000446:000007e0] <4>[14508.390000] in function i2c_ov9640_init I2C: driver for device i2c-ov9640 registed!.