3 commits

Author	SHA1	Message	Date
Sumit Gupta	68b9cd7270	cpufreq: tegra194: get consistent cpuinfo_cur_freq ... Frequency returned by 'cpuinfo_cur_freq' using counters is not fixed and keeps changing slightly. This change returns a consistent value from freq_table. If the reconstructed frequency has acceptable delta from the last written value, then return the frequency corresponding to the last written ndiv value from freq_table. Otherwise, print a warning and return the reconstructed freq. Signed-off-by: Sumit Gupta <sumitg@nvidia.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>	2020-12-07 13:02:37 +05:30
Sumit Gupta	93d0c1ab23	cpufreq: replace cpu_logical_map() with read_cpuid_mpir() ... Commit eaecca9e77 ("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: df320f8935 ("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>	2020-08-21 20:17:01 +02:00
Sumit Gupta	df320f8935	cpufreq: Add Tegra194 cpufreq driver ... 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>	2020-07-30 10:57:51 +05:30