[PATCH i2c-next v6] i2c: aspeed: Handle master/slave combined irq events properly

Wolfram Sang wsa at the-dreams.de
Thu Sep 6 11:40:49 PDT 2018


On Thu, Aug 23, 2018 at 03:57:31PM -0700, Jae Hyun Yoo wrote:
> In most of cases, interrupt bits are set one by one but there are
> also a lot of other cases that Aspeed I2C IP sends multiple
> interrupt bits with combining master and slave events using a
> single interrupt call. It happens much more in multi-master
> environment than single-master. For an example, when master is
> waiting for a NORMAL_STOP interrupt in its MASTER_STOP state,
> SLAVE_MATCH and RX_DONE interrupts could come along with the
> NORMAL_STOP in case of an another master immediately sends data
> just after acquiring the bus. In this case, the NORMAL_STOP
> interrupt should be handled by master_irq and the SLAVE_MATCH and
> RX_DONE interrupts should be handled by slave_irq. This commit
> modifies irq hadling logic to handle the master/slave combined
> events properly.
> 
> Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo at linux.intel.com>

Applied to for-next, thanks!

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