Hello Helge, Cc: += linux-i2c On Sun, Aug 07, 2016 at 08:48:29PM +0200, Helge Wiemann wrote: > I located the battery and removed it for 60 seconds, then booted up my NAS > and performed your commands. My syslog and tracelog are attached. > > I think this made no difference. The date is still incorrect. This didn't help, the bus is still stuck: > [ 2.817881] i2c i2c-0: mv64xxx_i2c_fsm: Ctlr Error -- state: 0x7, status: 0x38, addr: 0x30, flags: 0x1 This translates to: state: MV64XXX_I2C_STATE_WAITING_FOR_SLAVE_DATA status: MV64XXX_I2C_STATUS_MAST_LOST_ARB Not sure this is accurate though. From a quick look the mv64xxx driver doesn't support bus recovery. So unless someone implements this the best bet is probably: - do it by hand, maybe from the bootloader - do it really by hand, by shortcutting ground and SCL up to 9 times until SDA goes high again. Maybe someone from the i2c folks has a better idea. Best regards Uwe
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