On Thu, Apr 16, 2015 at 05:10:16PM +0100, Lorenzo Pieralisi wrote: > This patch is a v2 of a previous posting: > > http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/328192.html > > v1 -> v2: > > - Rebased against 4.0 > - Removed DT affinity probe interface > - Improved and optimized idle states comparison and cpumask creation > - Merged DT idle states vetting code in the ARM CPUidle driver > > This patch aims at enabling the generic CPUidle driver on ARM systems > with heterogeneous idle states. In the CPUidle context the kernel > considers cpus equal (and group them together through a CPUidle driver) > if they share the same set of idle states. > Since the idle states represent the differentiation point when it comes > to creating CPUidle drivers (their states and related cpu logical mask), > the idle states can be used as a means to create logical masks of cpus > for which the CPUidle driver applies. > > This patch sets the maximum number of static CPUidle drivers allowed to > two, since it is hard to foresee systems with more than two sets of CPUs > having different idle states; it is meant to keep allocation simple > while keeping functionality. > > The code carrying out idle states comparison is completely generic > and borrowed from OF unit tests; it overrides the OF API entirely > though to carry out properties (ie phandles list) comparison in the > fastest possible way. If deemed worthwhile it can be moved to generic OF > layer. > > Tested through several dts idle states permutations on Juno board with > CPUidle and related idle states enabled. Are there any comments/opinions on this patch ? Thanks, Lorenzo -- 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
