linux-dev - Linux kernel development work

Age	Commit message (Collapse)	Author	Files	Lines
2020-08-21	cpufreq: replace cpu_logical_map() with read_cpuid_mpir()	Sumit Gupta	1	-3/+7
	Commit eaecca9e7710 ("arm64: Fix __cpu_logical_map undefined issue") fixes the issue with building tegra194 cpufreq driver as module. But the fix might cause problem while supporting physical CPU hotplug[1]. This patch fixes the original problem by avoiding use of cpu_logical_map(). Instead calling read_cpuid_mpidr() to get MPIDR on target CPU. [1] https://lore.kernel.org/linux-arm-kernel/20200724131059.GB6521@bogus/ Fixes: df320f89359c ("cpufreq: Add Tegra194 cpufreq driver") Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Sumit Gupta <sumitg@nvidia.com> Acked-by: Viresh Kumar <viresh.kumar@linaro.org> [ rjw: Subject & changelog edits ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-07-30	cpufreq: Add Tegra194 cpufreq driver	Sumit Gupta	1	-0/+390
	Add support for CPU frequency scaling on Tegra194. The frequency of each core can be adjusted by writing a clock divisor value to a MSR on the core. The range of valid divisors is queried from the BPMP. Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> Signed-off-by: Sumit Gupta <sumitg@nvidia.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>