[PATCH v6 0/5] DDR/L3 Scaling support on SDM845 and SC7180 SoCs

Sibi Sankar
2020-06-05T21:33:54Z

This patch series aims to extend cpu based scaling support to L3/DDR on
SDM845 and SC7180 SoCs.

Patches [1-2] - Blacklist SDM845 and SC7180 in cpufreq-dt-platdev
Patches [3-5] - Update bw levels based on cpu frequency change

Based on Viresh's opp-next:
https://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm.git/log/?h=opp/linux-next

V6:
* Add global flag to distinguish between voltage update and opp add.
Use the same flag before trying to scale ddr/l3 bw [Viresh]
* Use dev_pm_opp_find_freq_ceil to grab all opps [Viresh]
* Move dev_pm_opp_of_find_icc_paths into probe [Viresh]

V5:
* Pick up R-bs from Amit
* Drop icc tag support/dt changes till the a consensus is achieved
* Use dev_pm_opp_adjust_voltage instead [Viresh]
* Drop dev_pm_opp_get_path_count [Saravana]
* Rework dev_pm_opp_set_bw

V4:
* Migrate to using Georgi's new bindings
* Misc fixups based on Matthias comments
* API fixups based on Bjorn's comments on v2
* Picked up a few R-bs from Matthias

v3:
* Migrated to using Saravana's opp-kBps bindings [1]
* Fixed some misc comments from Rajendra
* Added support for SC7180

v2:
* Incorporated Viresh's comments from:
https://lore.kernel.org/lkml/20190410102429.r6j6brm5kspmqxc3@vireshk-i7/
https://lore.kernel.org/lkml/20190410112516.gnh77jcwawvld6et@vireshk-i7/
* Dropped cpufreq-map passive governor

Sibi Sankar (5):
cpufreq: blacklist SDM845 in cpufreq-dt-platdev
cpufreq: blacklist SC7180 in cpufreq-dt-platdev
OPP: Add and export helper to set bandwidth
cpufreq: qcom: Update the bandwidth levels on frequency change
cpufreq: qcom: Disable fast switch when scaling DDR/L3

drivers/cpufreq/cpufreq-dt-platdev.c | 2 +
drivers/cpufreq/qcom-cpufreq-hw.c | 86 ++++++++++++++++++++++++++--
drivers/opp/core.c | 31 ++++++++++
include/linux/pm_opp.h | 6 ++
4 files changed, 121 insertions(+), 4 deletions(-)

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