On 03/03, Tomasz Figa wrote: > On a number of platforms, devices are part of controllable power > domains, which need to be enabled before such devices can be accessed > and may be powered down when the device is idle to save some power. > This means that on systems that support power domain control using > generic power domains subsystem, it is necessary to add device to its > power domain before binding a driver to it and remove it from its power > domain after its driver is unbound to make sure that an unused device > does not affect power domain state. > > Since this is not limited to particular busses and specific > archs/platforms, it is more convenient to do the above directly in > driver core, just as done with pinctrl default configuration. This patch > adds necessary code to really_probe() and __device_release_driver() to > achieve this and maintain consistent stack-like ordering of operations > happening when binding and unbinding a driver. > > Signed-off-by: Tomasz Figa <tomasz.figa@xxxxxxxxx> Reviewed-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx> -- Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
