linux.git/drivers/opp/core.c, branch v5.9-rc2

opp: Enable resources again if they were disabled earlier

2020-08-20T06:00:22+00:00

dev_pm_opp_set_rate() can now be called with freq = 0 in order
to either drop performance or bandwidth votes or to disable
regulators on platforms which support them.

In such cases, a subsequent call to dev_pm_opp_set_rate() with
the same frequency ends up returning early because 'old_freq == freq'

Instead make it fall through and put back the dropped performance
and bandwidth votes and/or enable back the regulators.

Cc: v5.3+  # v5.3+
Fixes: cd7ea582866f ("opp: Make dev_pm_opp_set_rate() handle freq = 0 to drop performance votes")
Reported-by: Sajida Bhanu 
Reviewed-by: Sibi Sankar 
Reported-by: Matthias Kaehlcke 
Tested-by: Matthias Kaehlcke 
Reviewed-by: Stephen Boyd 
Signed-off-by: Rajendra Nayak 
[ Viresh: Don't skip clk_set_rate() and massaged changelog ]
Signed-off-by: Viresh Kumar

opp: Put opp table in dev_pm_opp_set_rate() if _set_opp_bw() fails

2020-08-17T05:07:10+00:00

We get the opp_table pointer at the top of the function and so we should
put the pointer at the end of the function like all other exit paths
from this function do.

Cc: v5.8+  # v5.8+
Fixes: b00e667a6d8b ("opp: Remove bandwidth votes when target_freq is zero")
Reviewed-by: Rajendra Nayak 
Signed-off-by: Stephen Boyd 
[ Viresh: Split the patch into two ]
Signed-off-by: Viresh Kumar

opp: Put opp table in dev_pm_opp_set_rate() for empty tables

2020-08-17T05:07:10+00:00

We get the opp_table pointer at the top of the function and so we should
put the pointer at the end of the function like all other exit paths
from this function do.

Cc: v5.7+  # v5.7+
Fixes: aca48b61f963 ("opp: Manage empty OPP tables with clk handle")
Reviewed-by: Rajendra Nayak 
Signed-off-by: Stephen Boyd 
[ Viresh: Split the patch into two ]
Signed-off-by: Viresh Kumar

Merge branch 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm

2020-08-04T10:44:53+00:00

Pull ARM cpufreq driver changes for v5.9-rc1 from Viresh Kumar:

"Here are the details:

- Adaptive voltage scaling (AVS) support and minor cleanups for
  brcmstb driver (Florian Fainelli and Markus Mayer).

- A new tegra driver and cleanup for the existing one (Sumit Gupta and
  Jon Hunter).

- Bandwidth level support for Qcom driver along with OPP changes (Sibi
  Sankar).

- Cleanups to sti, cpufreq-dt, ap806, CPPC drivers (Viresh Kumar, Lee
  Jones, Ivan Kokshaysky, Sven Auhagen, and Xin Hao).

- Make schedutil default governor for ARM (Valentin Schneider).

- Fix dependency issues for imx (Walter Lozano).

- Cleanup around cached_resolved_idx in cpufreq core (Viresh Kumar)."

* 'cpufreq/arm/linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  cpufreq: make schedutil the default for arm and arm64
  cpufreq: cached_resolved_idx can not be negative
  cpufreq: Add Tegra194 cpufreq driver
  dt-bindings: arm: Add NVIDIA Tegra194 CPU Complex binding
  cpufreq: imx: Select NVMEM_IMX_OCOTP
  cpufreq: sti-cpufreq: Fix some formatting and misspelling issues
  cpufreq: tegra186: Simplify probe return path
  cpufreq: CPPC: Reuse caps variable in few routines
  cpufreq: ap806: fix cpufreq driver needs ap cpu clk
  cpufreq: cppc: Reorder code and remove apply_hisi_workaround variable
  cpufreq: dt: fix oops on armada37xx
  cpufreq: brcmstb-avs-cpufreq: send S2_ENTER / S2_EXIT commands to AVS
  cpufreq: brcmstb-avs-cpufreq: Support polling AVS firmware
  cpufreq: brcmstb-avs-cpufreq: more flexible interface for __issue_avs_command()
  cpufreq: qcom: Disable fast switch when scaling DDR/L3
  cpufreq: qcom: Update the bandwidth levels on frequency change
  OPP: Add and export helper to set bandwidth
  cpufreq: blacklist SC7180 in cpufreq-dt-platdev
  cpufreq: blacklist SDM845 in cpufreq-dt-platdev

OPP: Add and export helper to set bandwidth

2020-07-30T05:12:15+00:00

Add and export 'dev_pm_opp_set_bw' to set the bandwidth
levels associated with an OPP.

Signed-off-by: Sibi Sankar 
Signed-off-by: Viresh Kumar

opp: Allow disabled OPPs in dev_pm_opp_get_freq()

2020-07-24T02:35:54+00:00

Allow dev_pm_opp_get_freq() to work for disabled OPPs.

Signed-off-by: Andrew-sh.Cheng 
[ Viresh: Massaged commit log ]
Signed-off-by: Viresh Kumar

opp: core: Add missing export for dev_pm_opp_adjust_voltage

2020-07-24T02:35:53+00:00

Export dev_pm_opp_adjust_voltage() as it may be used by modules later
on.

Signed-off-by: Valdis Kletnieks 
[ Viresh: Rewrote commit log ]
Signed-off-by: Viresh Kumar

opp: Remove bandwidth votes when target_freq is zero

2020-05-29T04:45:12+00:00

We already drop several votes when target_freq is set to zero, drop
bandwidth votes as well.

Reported-by: Sibi Sankar 
Reviewed-by: Georgi Djakov 
Tested-by: Georgi Djakov 
Reviewed-by: Sibi Sankar 
Tested-by: Sibi Sankar 
Signed-off-by: Viresh Kumar

opp: core: add regulators enable and disable

2020-05-29T04:45:12+00:00

Add enable regulators to dev_pm_opp_set_regulators() and disable
regulators to dev_pm_opp_put_regulators(). Even if bootloader
leaves regulators enabled, they should be enabled in kernel in
order to increase the reference count.

Tested-by: Marek Szyprowski 
Acked-by: Clément Péron 
Tested-by: Clément Péron 
Signed-off-by: Kamil Konieczny 
[ Viresh: Enable the regulator only after it is programmed and add a
	  flag to track its status. ]
Signed-off-by: Viresh Kumar

opp: Reorder the code for !target_freq case

2020-05-29T04:45:12+00:00

Reorder the code a bit to make it more readable. Add additional comment
as well.

Tested-by: Marek Szyprowski 
Acked-by: Clément Péron 
Tested-by: Clément Péron 
Signed-off-by: Viresh Kumar