On Fri, Sep 13, 2013 at 09:14:20AM +0800, Aaron Lu wrote: > On 09/13/2013 06:06 AM, Sylwester Nawrocki wrote: > > So there is currently no way to avoid this behaviour, i.e. to have the > > adapter > > not activated before any of its client devices is probed, but only later on, > > after explicit call to pm_runtime_get*(&client->dev) in the client driver ? > The above pm_runtime_get_sync is used to make sure when the client I2C > device is going to be probed, its host adapter device is turned on(or we > will fail the probe). It doesn't affect the adapter's status before the > probe of I2C client device. The expecation is that if the adaptor needs to do anything to transfer it'll do that when asked to transfer - that way it can sit in a low power state when the bus is idle.
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