rendered paste body dmesg |grep ds1307
[ 29.526284] i2c i2c-1: new_device: Instantiated device ds1307 at 0x68
[ 29.714305] rtc-ds1307 1-0068: rtc core: registered ds1307 as rtc0
[ 29.714383] rtc-ds1307 1-0068: 56 bytes nvram
[ 282.155619] i2c i2c-1: Failed to register i2c client ds1307 at 0x68 (-16)
[ 316.423285] i2c i2c-1: Failed to register i2c client ds1307 at 0x68 (-16)
[ 461.151726] i2c i2c-1: Failed to register i2c client ds1307 at 0x68 (-16)
[ 499.156226] i2c i2c-1: Failed to register i2c client ds1307 at 0x68 (-16)
[ 1880.168605] i2c i2c-1: Failed to register i2c client ds1307 at 0x68 (-16)
[ 2251.890336] i2c i2c-1: Failed to register i2c client ds1307 at 0x68 (-16)
[ 2503.427007] i2c i2c-1: Failed to register i2c client ds1307 at 0x68 (-16)
[ 3296.768609] i2c i2c-1: Failed to register i2c client ds1307 at 0x68 (-16)