Re: [PATCH 1/2] i2c-designware: always clear interrupts before enabling them

2013-05-17 Thread Wolfram Sang
On Mon, May 13, 2013 at 01:54:30PM +0300, Mika Westerberg wrote: > If the I2C bus is put to a low power state by an ACPI method it might pull > the SDA line low (as its power is removed). Once the bus is put to full > power state again, the SDA line is pulled back to high. This transition > looks l

[PATCH 1/2] i2c-designware: always clear interrupts before enabling them

2013-05-13 Thread Mika Westerberg
If the I2C bus is put to a low power state by an ACPI method it might pull the SDA line low (as its power is removed). Once the bus is put to full power state again, the SDA line is pulled back to high. This transition looks like a STOP condition from the controller point-of-view which sets STOP de