0003294: Bus toggle doesn't work correctly if it is lock up

ID	Project	Category	View Status	Date Submitted	Last Update

0003294	FSiMX6	NI2C	public	2017-08-31 19:48	2017-09-06 08:28

Reporter	derksen	Assigned To
Priority	normal	Severity	minor	Reproducibility	always
Status	resolved	Resolution	fixed
Product Version	V2.40
Target Version	V2.50	Fixed in Version	V2.50

Summary	0003294: Bus toggle doesn't work correctly if it is lock up
Description	If i2c lines check is activated bus toggle doesn't work correctly.
Additional Information	Problem description: https://community.nxp.com/thread/316813 From I2C Spec. http://www.nxp.com/docs/en/user-guide/UM10204.pdf 3.1.16 Bus clear In the unlikely event where the clock (SCL) is stuck LOW, the preferential procedure is to reset the bus using the HW reset signal if your I2C devices have HW reset inputs. If the I2C devices do not have HW reset inputs, cycle power to the devices to activate the mandatory internal Power-On Reset (POR) circuit. If the data line (SDA) is stuck LOW, the master should send nine clock pulses. The device that held the bus LOW should release it sometime within those nine clocks. If not, then use the HW reset or cycle power to clear the bus. Resolution: http://elixir.free-electrons.com/linux/latest/source/drivers/i2c/i2c-core.c#L848

Forum Link
Found Driver Version	V1.0
Fixed Driver Version	V1.1