[RFC v3 00/10] DDR/L3 Scaling support on SDM845 and SC7180 SoCs

From: Sibi Sankar <sibis@codeaurora.org>
To: viresh.kumar@linaro.org, sboyd@kernel.org,
	georgi.djakov@linaro.org, saravanak@google.com
Cc: nm@ti.com, bjorn.andersson@linaro.org, agross@kernel.org,
	david.brown@linaro.org, robh+dt@kernel.org, mark.rutland@arm.com,
	rjw@rjwysocki.net, linux-arm-msm@vger.kernel.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-pm@vger.kernel.org, dianders@chromium.org,
	mka@chromium.org, vincent.guittot@linaro.org,
	amit.kucheria@linaro.org, ulf.hansson@linaro.org,
	Sibi Sankar <sibis@codeaurora.org>
Subject: [RFC v3 00/10] DDR/L3 Scaling support on SDM845 and SC7180 SoCs
Date: Tue, 28 Jan 2020 01:33:40 +0530	[thread overview]
Message-ID: <20200127200350.24465-1-sibis@codeaurora.org> (raw)

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

Patches [1-3] - Blacklist SDM845 and SC7180 in cpufreq-dt-platdev
Patches [5-7] - Hack in a way to add/remove multiple opp tables to
                a single device. I am yet to fix the debugfs to
		support multiple opp_tables per device but wanted to
		send what was working upstream to get an idea if multiple
		opp tables per device is a feature that will be useful
		upstream.
Patches [9-10] - Add the cpu/cpu-ddr/cpu-l3 opp tables for SDM845
                 and SC7180 SoCs.

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

Git-branch: https://github.com/QuinAsura/linux/tree/lnext-012420

Some alternate ways of hosting the opp-tables:
https://github.com/QuinAsura/linux/commit/50b92bfaadc8f9a0d1e12249646e018bd6d1a9d3
https://github.com/QuinAsura/linux/commit/3d23d1eefd16ae6d9e3ef91e93e78749d8844e98
Viresh didn't really like ^^ bindings and they dont really scale well. Just
including them here for completeness.

Depends on the following series:
[1] https://patchwork.kernel.org/cover/11277199/
[2] https://patchwork.kernel.org/cover/11055499/ 
[3] https://patchwork.kernel.org/cover/11326381/

Sibi Sankar (10):
  arm64: dts: qcom: sdm845: Add SoC compatible to MTP
  cpufreq: blacklist SDM845 in cpufreq-dt-platdev
  cpufreq: blacklist SC7180 in cpufreq-dt-platdev
  OPP: Add and export helper to update voltage
  opp: of: export _opp_of_get_opp_desc_node
  opp: Allow multiple opp_tables to be mapped to a single device
  opp: Remove multiple attached opp tables from a device
  cpufreq: qcom: Update the bandwidth levels on frequency change
  arm64: dts: qcom: sdm845: Add cpu OPP tables
  arm64: dts: qcom: sc7180: Add cpu OPP tables

 arch/arm64/boot/dts/qcom/sc7180.dtsi    | 287 +++++++++++++++
 arch/arm64/boot/dts/qcom/sdm845-mtp.dts |   2 +-
 arch/arm64/boot/dts/qcom/sdm845.dtsi    | 453 ++++++++++++++++++++++++
 drivers/cpufreq/cpufreq-dt-platdev.c    |   2 +
 drivers/cpufreq/qcom-cpufreq-hw.c       | 246 +++++++++++--
 drivers/opp/core.c                      | 111 +++++-
 drivers/opp/of.c                        |   3 +-
 drivers/opp/opp.h                       |   2 +
 include/linux/pm_opp.h                  |  10 +
 9 files changed, 1083 insertions(+), 33 deletions(-)

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