Clang warns (or errors with CONFIG_WERROR=y):
drivers/opp/of.c:1081:28: error: multiple unsequenced modifications to 'val' [-Werror,-Wunsequenced]
1081 | .freq = be32_to_cpup(val++) * 1000,
| ^
1082 | .u_volt = be32_to_cpup(val++),
| ~~
1 error generated.
There is no sequence point in a designated initializer. Move back to
separate variables for the creation of the values, so that there are
sequence points between each evaluation and increment of val.
Fixes: 75bbc92c09d8 ("OPP: Add dev_pm_opp_add_dynamic() to allow more flexibility")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
We currently get the following warning:
debugfs.c: In function ‘opp_debug_create_one’:
debugfs.c:63:42: warning: ‘%.1d’ directive output may be truncated writing between 1 and 10 bytes into a region of size 2 [-Wformat-truncation=]
snprintf(name, sizeof(name), "icc-path-%.1d", i);
^~~~
debugfs.c:63:32: note: directive argument in the range [0, 2147483647]
snprintf(name, sizeof(name), "icc-path-%.1d", i);
^~~~~~~~~~~~~~~
debugfs.c:63:3: note: ‘snprintf’ output between 11 and 20 bytes into a destination of size 11
snprintf(name, sizeof(name), "icc-path-%.1d", i);
Fix it by increasing size of the `name` array.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
These were previously exposed outside of the OPP core and needed doc
style commenting. They aren't public now and don't need the same.
This fixes warnings generated for builds with `W=1`:
core.c:2105: warning: Function parameter or member 'opp_table' not described in '_opp_set_supported_hw'
core.c:2105: warning: Excess function parameter 'dev' description in '_opp_set_supported_hw'
core.c:2148: warning: Function parameter or member 'opp_table' not described in '_opp_set_prop_name'
core.c:2148: warning: Excess function parameter 'dev' description in '_opp_set_prop_name'
core.c:2189: warning: Function parameter or member 'opp_table' not described in '_opp_set_regulators'
core.c:2189: warning: Excess function parameter 'count' description in '_opp_set_regulators'
core.c:2293: warning: Function parameter or member 'opp_table' not described in '_opp_set_clknames'
core.c:2293: warning: Function parameter or member 'config_clks' not described in '_opp_set_clknames'
core.c:2391: warning: Function parameter or member 'opp_table' not described in '_opp_set_config_regulators_helper'
core.c:2455: warning: Function parameter or member 'opp_table' not described in '_opp_attach_genpd'
core.c:2682: warning: Function parameter or member 'token' not described in 'dev_pm_opp_clear_config'
core.c:2682: warning: Excess function parameter 'opp_table' description in 'dev_pm_opp_clear_config'
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202309091558.x3JJrxFI-lkp@intel.com/
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Add dev_pm_opp_find_level_floor(), as is done for frequency and
bandwidth.
Signed-off-by: Krishna chaitanya chundru <quic_krichai@quicinc.com>
[ Viresh: Updated commit log and rearranged code ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
At this point the level (performance state) for an OPP is currently limited
to be requested for a device that is attached to a PM domain. Moreover,
the device needs to have the so called required-opps assigned to it, which
are based upon OPP tables being described in DT.
To extend the support beyond required-opps and DT, let's enable the level
to be set for all OPPs. More precisely, if the requested OPP has a valid
level let's try to request it through the device's optional PM domain, via
calling dev_pm_domain_set_performance_state().
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[ Viresh: Handle NULL opp in _set_opp_level() ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
To support performance scaling for any kinds of PM domains, let's move away
from using the genpd specific API, dev_pm_genpd_set_performance_state(), to
the common dev_pm_domain_set_performance_state().
No intended functional impact at this point.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Let's extend the dev_pm_opp_data with a level variable, to allow users to
specify a corresponding level (performance state) for a dynamically added
OPP.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The dev_pm_opp_add() API is limited to add dynamic OPPs with a frequency
and a voltage level. To enable more flexibility, let's add a new API,
dev_pm_opp_add_dynamic() that's takes a struct dev_pm_opp_data* instead of
a list of in-parameters.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
If dev_pm_domain_attach_by_name() returns NULL, then 0 will be passed to
PTR_ERR() as reported by the smatch warning below:
drivers/opp/core.c:2456 _opp_attach_genpd() warn: passing zero to 'PTR_ERR'
Fix it by checking for the non-NULL virt_dev pointer before passing it to
PTR_ERR. Otherwise return -ENODEV.
Fixes: 4ea9496cbc ("opp: Fix error check in dev_pm_opp_attach_genpd()")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
"opp" pointer is dereferenced before the IS_ERR_OR_NULL() check. Fix it by
removing the dereference to cache opp_table and dereference it directly
where opp_table is used.
This fixes the following smatch warning:
drivers/opp/core.c:232 dev_pm_opp_get_required_pstate() warn: variable
dereferenced before IS_ERR check 'opp' (see line 230)
Fixes: 84cb7ff35f ("OPP: pstate is only valid for genpd OPP tables")
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Now that we support finding indexed frequencies, lets update
_read_freq() to return the right one.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
The indexed version of the API is added for other floor and ceil, add
the same for exact as well for completeness.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
In the case of devices with multiple clocks, drivers need to specify the
frequency index for the OPP framework to get the specific frequency within
the required OPP. So let's introduce the dev_pm_opp_get_freq_indexed() API
accepting the frequency index as an argument.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[ Viresh: Fixed potential access to NULL opp pointer ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
In the case of devices with multiple clocks, drivers need to specify the
clock index for the OPP framework to find the OPP corresponding to the
floor/ceil of the supplied frequency. So let's introduce the two new APIs
accepting the clock index as an argument.
These APIs use the exising _find_key_ceil() helper by supplying the clock
index to it.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
[ Viresh: Rearranged definitions in pm_opp.h ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
fa155f4f83 ("OPP: Use dev_err_probe() when failing to get icc_path")
failed to actually use the error it was trying to log:
smatch warnings:
drivers/opp/of.c:516 dev_pm_opp_of_find_icc_paths() warn: passing zero to 'dev_err_probe'
Make sure to use the right error and pass it along.
Fixes: fa155f4f83 ("OPP: Use dev_err_probe() when failing to get icc_path")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202306262008.guNLgjt6-lkp@intel.com/
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This, in tandem with dynamic debug, can print useful information about
-EPROBE_DEFFER like below, and keeps similar behavior for other errors:
[ 16.561072] cpu cpu0: error -EPROBE_DEFER: dev_pm_opp_of_find_icc_paths: Unable to get path0
[ 16.575777] platform 18591000.cpufreq: deferred probe pending
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
While adding support for "performance states" in the OPP and genpd core,
it was decided to set the `pstate` field via genpd's
pm_genpd_opp_to_performance_state() helper, to allow platforms to set
`pstate` even if they don't have a corresponding `level` field in the DT
OPP tables (More details are present in commit 6e41766a6a ("PM /
Domain: Implement of_genpd_opp_to_performance_state()")).
Revisiting that five years later clearly suggests that it was
over-designed as all current users are eventually using the `level`
value only.
The previous commit already added necessary checks to make sure pstate
is only used for genpd tables. Lets now simplify this a little, and use
`level` directly and remove `pstate` field altogether.
Suggested-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
It is not very clear right now that the `pstate` field is only valid for
genpd OPP tables and not consumer tables. And there is no checking for
the same at various places.
Add checks in place to verify that and make it clear to the reader.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Tested-by: Bjorn Andersson <quic_bjorande@quicinc.com>
This code was added (long back) by commit 009acd196f ("PM / OPP:
Support updating performance state of device's power domain") and at
that time the `opp->pstate` field was used to store the performance
state required by a device's OPP.
Over time that changed and the `->pstate` field is now used only for
genpd devices and consumer devices access that via the required-opps
instead.
Because of all these changes, _opp_table_kref_release() now drops the
constraint only when the genpd's OPP table gets freed and not the
device's. Which is definitely not what we wanted. And dropping the
constraint doesn't have much meaning as the genpd itself is going away.
Moreover, if we want to drop constraints here, then just dropping the
performance constraint alone isn't sufficient as there are other
resource constraints like clk, regulator, etc. too, which must be
handled.
Probably the right thing to do here is to leave this decision to the
consumers, which can call `dev_pm_opp_set_rate(dev, 0)` or similar APIs
to drop all constraints properly. Which many of the consumers already
do.
Remove the special code, which is broken anyway.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
The `opp_table_lock` lock is already used to protect the list elsewhere,
use it while adding or removing entries from it.
Reported-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
When dev_pm_opp_of_find_icc_paths() in _allocate_opp_table() returns
-EPROBE_DEFER, the opp_table is freed again, to wait until all the
interconnect paths are available.
However, if the OPP table is using required-opps then it may already
have been added to the global lazy_opp_tables list. The error path
does not remove the opp_table from the list again.
This can cause crashes later when the provider of the required-opps
is added, since we will iterate over OPP tables that have already been
freed. E.g.:
Unable to handle kernel NULL pointer dereference when read
CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.4.0-rc3
PC is at _of_add_opp_table_v2 (include/linux/of.h:949
drivers/opp/of.c:98 drivers/opp/of.c:344 drivers/opp/of.c:404
drivers/opp/of.c:1032) -> lazy_link_required_opp_table()
Fix this by calling _of_clear_opp_table() to remove the opp_table from
the list and clear other allocated resources. While at it, also add the
missing mutex_destroy() calls in the error path.
Cc: stable@vger.kernel.org
Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Fixes: 7eba0c7641 ("opp: Allow lazy-linking of required-opps")
Signed-off-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Otherwise, when enabling a debug build and dynamic debug in the kernel, it
quickly floods the kernel ring buffer and makes debugging of other
subsystems almost impossible, unless manually disabled.
Signed-off-by: Adrián Larumbe <adrian.larumbe@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
- First part of DT header detangling dropping cpu.h from of_device.h
and replacing some includes with forward declarations. A handful of
drivers needed some adjustment to their includes as a result.
- Refactor of_device.h to be used by bus drivers rather than various
device drivers. This moves non-bus related functions out of
of_device.h. The end goal is for of_platform.h and of_device.h to stop
including each other.
- Refactor open coded parsing of "ranges" in some bus drivers to use DT
address parsing functions
- Add some new address parsing functions of_property_read_reg(),
of_range_count(), and of_range_to_resource() in preparation to convert
more open coded parsing of DT addresses to use them.
- Treewide clean-ups to use of_property_read_bool() and
of_property_present() as appropriate. The ones here are the ones
that didn't get picked up elsewhere.
-----BEGIN PGP SIGNATURE-----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=89Zj
-----END PGP SIGNATURE-----
Merge tag 'devicetree-for-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull more devicetree updates from Rob Herring:
- First part of DT header detangling dropping cpu.h from of_device.h
and replacing some includes with forward declarations. A handful of
drivers needed some adjustment to their includes as a result.
- Refactor of_device.h to be used by bus drivers rather than various
device drivers. This moves non-bus related functions out of
of_device.h. The end goal is for of_platform.h and of_device.h to
stop including each other.
- Refactor open coded parsing of "ranges" in some bus drivers to use DT
address parsing functions
- Add some new address parsing functions of_property_read_reg(),
of_range_count(), and of_range_to_resource() in preparation to
convert more open coded parsing of DT addresses to use them.
- Treewide clean-ups to use of_property_read_bool() and
of_property_present() as appropriate. The ones here are the ones that
didn't get picked up elsewhere.
* tag 'devicetree-for-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (34 commits)
bus: tegra-gmi: Replace of_platform.h with explicit includes
hte: Use of_property_present() for testing DT property presence
w1: w1-gpio: Use of_property_read_bool() for boolean properties
virt: fsl: Use of_property_present() for testing DT property presence
soc: fsl: Use of_property_present() for testing DT property presence
sbus: display7seg: Use of_property_read_bool() for boolean properties
sparc: Use of_property_read_bool() for boolean properties
sparc: Use of_property_present() for testing DT property presence
bus: mvebu-mbus: Remove open coded "ranges" parsing
of/address: Add of_property_read_reg() helper
of/address: Add of_range_count() helper
of/address: Add support for 3 address cell bus
of/address: Add of_range_to_resource() helper
of: unittest: Add bus address range parsing tests
of: Drop cpu.h include from of_device.h
OPP: Adjust includes to remove of_device.h
irqchip: loongson-eiointc: Add explicit include for cpuhotplug.h
cpuidle: Adjust includes to remove of_device.h
cpufreq: sun50i: Add explicit include for cpu.h
cpufreq: Adjust includes to remove of_device.h
...
Now that of_cpu_device_node_get() is defined in of.h, of_device.h is just
implicitly including other includes, and is no longer needed. Adjust the
include files with what was implicitly included by of_device.h (cpu.h and
of.h) and drop including of_device.h.
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20230329-dt-cpu-header-cleanups-v1-18-581e2605fe47@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
The required-opps configuration is closely tied to genpd and performance
states at the moment and it is not very obvious that required-opps can
live without genpds. Though we don't support configuring required-opps
for non-genpd cases currently.
This commit aims at separating these parts, where configuring genpds
would be a special case of configuring the required-opps.
Add a specialized callback, set_required_opps(), to the opp table and
set it to different callbacks accordingly.
This shouldn't result in any functional changes for now.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
There is no real need of keeping separate code for single genpd case, it
can be made to work with a simple change.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
It is preferred to use typed property access functions (i.e.
of_property_read_<type> functions) rather than low-level
of_get_property/of_find_property functions for reading properties. As
part of this, convert of_get_property/of_find_property calls to the
recently added of_property_present() helper when we just want to test
for presence of a property and nothing more.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Since commit ff9fb72bc0 ("debugfs: return error values,
not NULL") changed return value of debugfs_rename() in
error cases from %NULL to %ERR_PTR(-ERROR), we should
also check error values instead of NULL.
Fixes: ff9fb72bc0 ("debugfs: return error values, not NULL")
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Now that the SRCU Kconfig option is unconditionally selected, there is
no longer any point in selecting it. Therefore, remove the "select SRCU"
Kconfig statements.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Viresh Kumar <vireshk@kernel.org>
Cc: Nishanth Menon <nm@ti.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: <linux-pm@vger.kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The opp-microwatt property was added with the intention of providing
platforms a way to specify a precise value for the power consumption
of a device at a given OPP to enable better energy-aware scheduling
decisions by informing the kernel of the total static and dynamic
power of a device at a given OPP, removing the reliance on the EM
subsystem's often flawed estimations. This property is parsed by
opp_parse_supplies(), which creates a hard dependency on the
opp-microvolt property.
Some platforms, such as Apple Silicon, do not describe their device's
voltage regulators in the DT as they cannot be controlled by the kernel
and/or rely on opaque firmware algorithms to control their voltage and
current characteristics at runtime. We can, however, experimentally
determine the power consumption of a given device at a given OPP, taking
advantage of opp-microwatt to provide EAS on such devices as was
initially intended.
Allow platforms to specify and consume any subset of opp-microvolt,
opp-microamp, or opp-microwatt without a hard dependency on
opp-microvolt to enable this functionality on such platforms.
Tested-by: James Calligeros <jcalligeros99@gmail.com>
Signed-off-by: James Calligeros <jcalligeros99@gmail.com>
Co-developed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
opp_parse_supplies() has grown into too big of a routine (~190 lines)
and it is not straight-forward to understand it anymore.
Break it into smaller routines and reduce code redundancy a bit by using
the same code to parse properties.
This shouldn't result in any logical changes.
Tested-by: James Calligeros <jcalligeros99@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
We missed parsing the named opp-microwatt-<name> property, fix that.
Tested-by: James Calligeros <jcalligeros99@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
smatch complains that 'ret' may be returned un-initialized.
Explicitly return 0 if we reach the end of the function (should
'opp_table->clk_count' be 0).
Fixes: 8174a3a613 ("OPP: Provide a simple implementation to configure multiple clocks")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
- Make dev_pm_opp_set_regulators() accept NULL terminated list (Viresh
Kumar).
- Add dev_pm_opp_set_config() and friends and migrate other
users/helpers to using them (Viresh Kumar).
- Add support for multiple clocks for a device (Viresh Kumar and
Krzysztof Kozlowski).
- Configure resources before adding OPP table for Venus (Stanimir
Varbanov).
- Keep reference count up for opp->np and opp_table->np while they are
still in use (Liang He).
- Minor cleanups (Viresh Kumar and Yang Li).
-----BEGIN PGP SIGNATURE-----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=NHBQ
-----END PGP SIGNATURE-----
Merge tag 'opp-updates-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
Pull operating performance points (OPP) updates for 5.20-rc1 from Viresh
Kumar:
"- Make dev_pm_opp_set_regulators() accept NULL terminated list (Viresh
Kumar).
- Add dev_pm_opp_set_config() and friends and migrate other
users/helpers to using them (Viresh Kumar).
- Add support for multiple clocks for a device (Viresh Kumar and
Krzysztof Kozlowski).
- Configure resources before adding OPP table for Venus (Stanimir
Varbanov).
- Keep reference count up for opp->np and opp_table->np while they are
still in use (Liang He).
- Minor cleanups (Viresh Kumar and Yang Li)."
* tag 'opp-updates-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm: (43 commits)
venus: pm_helpers: Fix warning in OPP during probe
OPP: Don't drop opp->np reference while it is still in use
OPP: Don't drop opp_table->np reference while it is still in use
OPP: Remove dev{m}_pm_opp_of_add_table_noclk()
PM / devfreq: tegra30: Register config_clks helper
OPP: Allow config_clks helper for single clk case
OPP: Provide a simple implementation to configure multiple clocks
OPP: Assert clk_count == 1 for single clk helpers
OPP: Add key specific assert() method to key finding helpers
OPP: Compare bandwidths for all paths in _opp_compare_key()
OPP: Allow multiple clocks for a device
dt-bindings: opp: accept array of frequencies
OPP: Make dev_pm_opp_set_opp() independent of frequency
OPP: Reuse _opp_compare_key() in _opp_add_static_v2()
OPP: Remove rate_not_available parameter to _opp_add()
OPP: Use consistent names for OPP table instances
OPP: Use generic key finding helpers for bandwidth key
OPP: Use generic key finding helpers for level key
OPP: Add generic key finding helpers and use them for freq APIs
OPP: Remove dev_pm_opp_find_freq_ceil_by_volt()
...
The struct dev_pm_opp contains a reference of the DT node, opp->np,
throughout its lifetime. We should increase the refcount for the same
from _opp_add_static_v2(), and drop it while removing the OPP finally.
Signed-off-by: Liang He <windhl@126.com>
[ Viresh: Updated subject / commit log, create _of_clear_opp() and drop
reference from it]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The OPP table contains a reference of the DT node, opp_table->np,
throughout its lifetime. We shouldn't drop the refcount for the same
from _of_init_opp_table(), but do that while removing the OPP table
finally.
Signed-off-by: Liang He <windhl@126.com>
[ Viresh: Updated subject / commit log and drop reference from
_of_clear_opp_table() ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The milli-Watts precision causes rounding errors while calculating
efficiency cost for each OPP. This is especially visible in the 'simple'
Energy Model (EM), where the power for each OPP is provided from OPP
framework. This can cause some OPPs to be marked inefficient, while
using micro-Watts precision that might not happen.
Update all EM users which access 'power' field and assume the value is
in milli-Watts.
Solve also an issue with potential overflow in calculation of energy
estimation on 32bit machine. It's needed now since the power value
(thus the 'cost' as well) are higher.
Example calculation which shows the rounding error and impact:
power = 'dyn-power-coeff' * volt_mV * volt_mV * freq_MHz
power_a_uW = (100 * 600mW * 600mW * 500MHz) / 10^6 = 18000
power_a_mW = (100 * 600mW * 600mW * 500MHz) / 10^9 = 18
power_b_uW = (100 * 605mW * 605mW * 600MHz) / 10^6 = 21961
power_b_mW = (100 * 605mW * 605mW * 600MHz) / 10^9 = 21
max_freq = 2000MHz
cost_a_mW = 18 * 2000MHz/500MHz = 72
cost_a_uW = 18000 * 2000MHz/500MHz = 72000
cost_b_mW = 21 * 2000MHz/600MHz = 70 // <- artificially better
cost_b_uW = 21961 * 2000MHz/600MHz = 73203
The 'cost_b_mW' (which is based on old milli-Watts) is misleadingly
better that the 'cost_b_uW' (this patch uses micro-Watts) and such
would have impact on the 'inefficient OPPs' information in the Cpufreq
framework. This patch set removes the rounding issue.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
There is a corner case with Tegra30, where we want to skip clk
configuration via dev_pm_opp_set_opp(), but still want the OPP core to
read the "opp-hz" property so we can find the right OPP via freq finding
helpers.
This is the easiest of the ways to make it work, without any special
hacks in the OPP core. Allow config_clks to be passed for single clk
case.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This provides a simple implementation to configure multiple clocks for a
device.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Many helpers can be safely called only for devices that have a single
clk associated with them. Assert the same for those routines.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The helpers for the clock key, at least, would need to assert that the
helpers are called only for single clock case. Prepare for that by
adding an argument to the key finding helpers.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Replicate the same behavior as "rates" here and compare all values
instead of relying on the first entry alone.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This patch adds support to allow multiple clocks for a device.
The design is pretty much similar to how this is done for regulators,
and platforms can supply their own version of the config_clks() callback
if they have multiple clocks for their device. The core manages the
calls via opp_table->config_clks() eventually.
We have kept both "clk" and "clks" fields in the OPP table structure and
the reason is provided as a comment in _opp_set_clknames(). The same
isn't done for "rates" though and we use rates[0] at most of the places
now.
Co-developed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
dev_pm_opp_set_opp() can be called for any device, it may or may not
have a frequency value associated with it.
If a frequency value isn't available, we pass 0 to _set_opp(). Make it
optional instead by making _set_opp() accept a pointer instead, as the
frequency value is anyway available in the OPP. This makes
dev_pm_opp_set_opp() and _set_opp() completely independent of any
special key value.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reuse _opp_compare_key() in _opp_add_static_v2() instead of just
comparing frequency while finding suspend frequency. Also add a comment
over _opp_compare_key() explaining its return values.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
commit 32715be4fe ("opp: Fix adding OPP entries in a wrong order if
rate is unavailable") removed the only user of this field, get rid of
rest of it now.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The OPP table is called "opp_table" at most of the places and "table" at
few. Make all of them follow the same naming convention, "opp_table".
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
There are three type of helpers, to find exact, ceil, and floor values,
replicated for multiple key types, freq, level, bw. And all of these
helpers share a lot of boilerplate code.
Add generic key finding helpers to reduce code redundancy.
Also update the freq finder helpers to use the new infrastructure.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This was added few years back, but the code that was supposed to use it
never got merged. Remove the unused helper.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The only user of the custom helper is migrated to use
dev_pm_opp_set_config_regulators() interface. Remove the now unused
custom OPP helper support.
This cleans up _set_opp() and leaves a single code path to be used by
all users.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The OPP core now provides dev_pm_opp_set_config_regulators() interface,
which needs the platforms to just set the OPP voltages instead of both
clk and voltage. The clock is set by the OPP core instead and hence
reduces code redundancy.
Migrate the only user of the custom set_opp() to
dev_pm_opp_set_config_regulators().
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
We already have an API for getting voltage information for a single
regulator, dev_pm_opp_get_voltage(), but there is nothing available for
multiple regulator case.
This patch adds a new API, dev_pm_opp_get_supplies(), to get all
information related to the supplies for an OPP.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
In order to reuse the same code path, i.e. clk_set_rate() from
_set_opp(), migrate _generic_set_opp_regulator() to implement a
config_regulators() interface.
It is renamed to _opp_config_regulator_single() and is set as the
preferred config_regulators() interface whenever we have a single
regulator available.
Note that this also drops code responsible for restoring the
voltage/freq in case of errors. We aren't handling that properly
currently, restoring only some of the resources while leaving others out
(like bandwidth and required OPPs). It is better to drop all of it
instead of partial restoration.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Extend the dev_pm_opp_set_config() interface to allow adding
config_regulators() helpers. This helper will be called to set the
voltages of the regulators from the regular path in _set_opp(), while we
are trying to change the OPP.
This will eventually replace the custom set_opp() helper.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Now that we have a central API to handle all OPP table configurations,
migrate the set-prop-name family of helpers to use the new
infrastructure.
The return type and parameter to the APIs change a bit due to this,
update the current users as well in the same commit in order to avoid
breaking builds.
Acked-by: Samuel Holland <samuel@sholland.org> # sun50i
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Now that we have a central API to handle all OPP table configurations,
migrate the attach-genpd family of helpers to use the new
infrastructure.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Now that we have a central API to handle all OPP table configurations,
migrate the set-opp-helper family of helpers to use the new
infrastructure.
The return type and parameter to the APIs change a bit due to this,
update the current users as well in the same commit in order to avoid
breaking builds.
Remove devm_pm_opp_register_set_opp_helper() as it has no users
currently.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Now that we have a central API to handle all OPP table configurations,
migrate the set-clk-name family of helpers to use the new
infrastructure.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Now that we have a central API to handle all OPP table configurations,
migrate the set-supported-hw family of helpers to use the new
infrastructure.
The return type and parameter to the APIs change a bit due to this,
update the current users as well in the same commit in order to avoid
breaking builds.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Now that we have a central API to handle all OPP table configurations,
migrate the set-regulators family of helpers to use the new
infrastructure.
The return type and parameter to the APIs change a bit due to this,
update the current users as well in the same commit in order to avoid
breaking builds.
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The OPP core already have few configuration specific APIs and it is
getting complex or messy for both the OPP core and its users.
Lets introduce a new set of API which will be used for all kind of
different configurations, and shall eventually be used by all the
existing ones.
The new API, returns a unique token instead of a pointer to the OPP
table, which allows the OPP core to drop the resources selectively later
on.
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Make dev_pm_opp_set_regulators() accept a NULL terminated list of names
instead of making the callers keep the two parameters in sync, which
creates an opportunity for bugs to get in.
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Steven Price <steven.price@arm.com> # panfrost
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Track if the clock name is configured by the platform or not. This is a
preparatory change and will be used by later commits. This also makes
the behavior of the clkname API similar to other ones, which allow
repeated calls to the same API for each CPU.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Make @freq to @bw in dev_pm_opp_find_bw_ceil() and
dev_pm_opp_find_bw_floor() kernel-doc comment to
remove warnings found by running scripts/kernel-doc,
which is caused by using 'make W=1'.
drivers/opp/core.c:753: warning: Function parameter or member 'bw' not
described in 'dev_pm_opp_find_bw_ceil'
drivers/opp/core.c:753: warning: Excess function parameter 'freq'
description in 'dev_pm_opp_find_bw_ceil'
drivers/opp/core.c:812: warning: Function parameter or member 'bw' not
described in 'dev_pm_opp_find_bw_floor'
drivers/opp/core.c:812: warning: Excess function parameter 'freq'
description in 'dev_pm_opp_find_bw_floor'
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
dev_pm_domain_attach_by_name() may return NULL in some cases,
so IS_ERR() doesn't meet the requirements. Thus fix it.
Fixes: 6319aee10e ("opp: Attach genpds to devices from within OPP core")
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
[ Viresh: Replace ENODATA with ENODEV ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
- Minor update to dt-binding for Qcom's opp-v2-kryo-cpu (Yassine Oudjana).
- Use list iterator only inside the list_for_each_entry loop (Xiaomeng
Tong, and Jakob Koschel).
- New APIs related to finding OPP based on interconnect bandwidth
(Krzysztof Kozlowski).
- Fix the missing of_node_put() in _bandwidth_supported() (Dan Carpenter).
- Cleanups (Krzysztof Kozlowski, and Viresh Kumar).
-----BEGIN PGP SIGNATURE-----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=tNiB
-----END PGP SIGNATURE-----
Merge tag 'opp-updates-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
Pull OPP (Operating Performance Points) updates for 5.19-rc1 from Viresh
Kumar:
- Minor update to dt-binding for Qcom's opp-v2-kryo-cpu (Yassine
Oudjana).
- Use list iterator only inside the list_for_each_entry loop (Xiaomeng
Tong, and Jakob Koschel).
- New APIs related to finding OPP based on interconnect bandwidth
(Krzysztof Kozlowski).
- Fix the missing of_node_put() in _bandwidth_supported() (Dan
Carpenter).
- Cleanups (Krzysztof Kozlowski, and Viresh Kumar).
* tag 'opp-updates-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
opp: Reorder definition of ceil/floor helpers
opp: Add apis to retrieve opps with interconnect bandwidth
dt-bindings: opp: opp-v2-kryo-cpu: Remove SMEM
opp: use list iterator only inside the loop
opp: replace usage of found with dedicated list iterator variable
PM: opp: simplify with dev_err_probe()
OPP: call of_node_put() on error path in _bandwidth_supported()
Reorder the helpers to keep all freq specific ones, followed by level
and bw.
No functional change.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Add dev_pm_opp_find_bw_ceil and dev_pm_opp_find_bw_floor to retrieve opps
based on interconnect associated with the opp and bandwidth. The index
variable is the index of the interconnect as specified in the opp table
in Devicetree.
Co-developed-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The .active_power() callback passes the device pointer when it's called.
Aligned with a convetion present in other subsystems and pass the 'dev'
as a first argument. It looks more cleaner.
Adjust all affected drivers which implement that API callback.
Suggested-by: Ionela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Ionela Voinescu <ionela.voinescu@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.
To *never* use the list iterator variable after the loop it was
concluded to use a separate dedicated pointer variable [1].
In this case, use a new variable 'iter' as the list iterator, while
use the old variable 'new_dev' as a dedicated pointer to point to the
found entry. And BUG_ON(!new_dev);.
[1]: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/
Signed-off-by: Xiaomeng Tong <xiam0nd.tong@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
To move the list iterator variable into the list_for_each_entry_*()
macro in the future it should be avoided to use the list iterator
variable after the loop body.
To *never* use the list iterator variable after the loop it was
concluded to use a separate iterator variable instead of a
found boolean [1].
This removes the need to use a found variable and simply checking if
the variable was set, can determine if the break/goto was hit.
Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/
Signed-off-by: Jakob Koschel <jakobkoschel@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Common pattern of handling deferred probe can be simplified with
dev_err_probe(). Less code and the error value gets printed.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This code does not call of_node_put(opp_np) if of_get_next_available_child()
returns NULL. But it should.
Fixes: 45679f9b50 ("opp: Don't parse icc paths unnecessarily")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The Energy Model (EM) can be created based on DT entry:
'dynamic-power-coefficient'. It's a 'simple' EM which is limited to the
dynamic power. It has to fit into the math formula which requires also
information about voltage. Some of the platforms don't expose voltage
information, thus it's not possible to use EM registration using DT.
This patch aims to fix it. It introduces new implementation of the EM
registration callback. The new mechanism relies on the new OPP feature
allowing to get power (which is coming from "opp-microwatt" DT property)
expressed in micro-Watts.
The patch also opens new opportunity to better support platforms, which
have a decent static power. It allows to register the EM based on real
power measurements which models total power (static + dynamic), so better
reflects real HW.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Add new property to the OPP: power value. The OPP entry in the DT can have
"opp-microwatt". Add the needed code to handle this new property in the
existing infrastructure.
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
It is difficult to find which OPPs are active at the moment, specially
if there are multiple OPPs with same frequency available in the device
tree (controlled by supported hardware feature).
Expose name of the DT node to find out the exact OPP.
While at it, also expose level field.
Reported-by: Leo Yan <leo.yan@linaro.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Fix sparse warning:
drivers/opp/of.c:924 _opp_add_static_v2() warn: passing zero to 'ERR_PTR'
For duplicate OPPs 'ret' be set to zero.
Fixes: deac8703da ("PM / OPP: _of_add_opp_table_v2(): increment count only if OPP is added")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Elements of the 'names' array are not changed by the code, constify them
for consistency.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The 'required-opps' property is optional. So of_count_phandle_with_args()
can return -ENOENT when queried for required-opps. Handle this case.
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
* pm-pci:
PCI: PM: Enable PME if it can be signaled from D3cold
PCI: PM: Avoid forcing PCI_D0 for wakeup reasons inconsistently
PCI: Use pci_update_current_state() in pci_enable_device_flags()
* pm-sleep:
PM: sleep: unmark 'state' functions as kernel-doc
PM: sleep: check RTC features instead of ops in suspend_test
PM: sleep: s2idle: Replace deprecated CPU-hotplug functions
* pm-domains:
PM: domains: Fix domain attach for CONFIG_PM_OPP=n
arm64: dts: sc7180: Add required-opps for i2c
PM: domains: Add support for 'required-opps' to set default perf state
opp: Don't print an error if required-opps is missing
* powercap:
powercap: Add Power Limit4 support for Alder Lake SoC
powercap: intel_rapl: Replace deprecated CPU-hotplug functions
Commit 4fa82a87ba ("opp: Allow required-opps to be used for non genpd
use cases") dereferences the pointers in required_opp_tables but these
might be set to an ERR_PTR if the list still has lazy links pending,
resulting in segfaults. Prior to this patch IS_ERR was also checked on
required_opp_tables[i] before reading ->is_genpd inside
_opp_table_alloc_required_tables, which is at the same time the
predicate to add this table to the lazy list. This segfault is solved
by reordering the checks to bail on lazy pending tables before reading
->is_genpd.
Fixes: 4fa82a87ba ("opp: Allow required-opps to be used for non genpd use cases")
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
The 'required-opps' property is considered optional, hence remove
the pr_err() in of_parse_required_opp() when we find the property is
missing.
While at it, also fix the return value of
of_get_required_opp_performance_state() when of_parse_required_opp()
fails, return a -ENODEV instead of the -EINVAL.
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
The current_opp is released only when whole OPP table is released,
otherwise it's only marked as removed by dev_pm_opp_remove_table().
Functions like dev_pm_opp_put_clkname() and dev_pm_opp_put_supported_hw()
are checking whether OPP table is empty and it's not if current_opp is
set since it holds the refcount of OPP, this produces a noisy warning
from these functions about busy OPP table. Remove the checks to fix it.
Cc: stable@vger.kernel.org
Fixes: 81c4d8a3c4 ("opp: Keep track of currently programmed OPP")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This WARN can be triggered per-core and the stack trace is not useful.
Replace it with plain dev_err(). Fix a comment while at it.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Don't limit required_opp_table to genpd only. One possible use case is
cpufreq based devfreq governor, which can use required-opps property to
derive devfreq from cpufreq.
Though the OPP core still doesn't support non-genpd required-opps in
_set_required_opps().
Suggested-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
[ Viresh: Update _set_required_opps() to check for genpd ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Using list_del_init() instead of list_del() + INIT_LIST_HEAD()
to simpify the code.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Make devm_pm_opp_attach_genpd() to return error code instead of
opp_table pointer in order to have return type consistent with the
other resource-managed OPP helpers.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Make devm_pm_opp_register_set_opp_helper() to return error code instead
of opp_table pointer in order to have return type consistent with the
other resource-managed OPP helpers.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
