Commit Graph

314 Commits

Author SHA1 Message Date
Ulf Hansson
d6caca30a5 OPP: Drop redundant *_opp_attach|detach_genpd()
All users of *_opp_attach|detach_genpd(), have been converted to use
dev|devm_pm_domain_attach|detach_list(), hence let's drop it along with its
corresponding exported functions.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20241002122232.194245-12-ulf.hansson@linaro.org
2024-10-10 14:24:30 +02:00
Ulf Hansson
0880d087c9 OPP: Drop redundant code in _link_required_opps()
Due to that the required-devs for the required OPPs are now always being
assigned, we no longer need the special treatment in _link_required_opps()
for the single PM domain case. Let's therefore drop it.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20241002122232.194245-8-ulf.hansson@linaro.org
2024-10-10 14:15:54 +02:00
Ulf Hansson
0e8158b4a8 OPP: Rework _set_required_devs() to manage a single device per call
At this point there are no consumer drivers that makes use of
_set_required_devs(), hence it should be straightforward to rework the code
to enable it to better integrate with the PM domain attach procedure.

During attach, one device at the time is being hooked up to its
corresponding PM domain. Therefore, let's update the _set_required_devs()
to align to this behaviour, allowing callers to fill out one required_dev
per call. Subsequent changes starts making use of this.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20241002122232.194245-4-ulf.hansson@linaro.org
2024-10-10 14:11:41 +02:00
Dan Carpenter
eb8333673e OPP: fix error code in dev_pm_opp_set_config()
This is an error path so set the error code.  Smatch complains about the
current code:

    drivers/opp/core.c:2660 dev_pm_opp_set_config()
    error: uninitialized symbol 'ret'.

Fixes: e37440e7e2 ("OPP: Call dev_pm_opp_set_opp() for required OPPs")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/3f3660af-4ea0-4a89-b3b7-58de7b16d7a5@stanley.mountain
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2024-10-02 01:27:50 +02:00
Rafael J. Wysocki
0a06811d66 Merge branches 'pm-sleep', 'pm-opp' and 'pm-tools'
Merge updates related to system sleep, operating performance points
(OPP) updates, and PM tooling updates for 6.12-rc1:

 - Remove unused stub for saveable_highmem_page() and remove deprecated
   macros from power management documentation (Andy Shevchenko).

 - Use ysfs_emit() and sysfs_emit_at() in "show" functions in the PM
   sysfs interface (Xueqin Luo).

 - Update the maintainers information for the operating-points-v2-ti-cpu DT
   binding (Dhruva Gole).

 - Drop unnecessary of_match_ptr() from ti-opp-supply (Rob Herring).

 - Update directory handling and installation process in the pm-graph
   Makefile and add .gitignore to ignore sleepgraph.py artifacts to
   pm-graph (Amit Vadhavana, Yo-Jung Lin).

 - Make cpupower display residency value in idle-info (Aboorva
   Devarajan).

 - Add missing powercap_set_enabled() stub function to cpupower (John
   B. Wyatt IV).

 - Add SWIG support to cpupower (John B. Wyatt IV).

* pm-sleep:
  PM: hibernate: Remove unused stub for saveable_highmem_page()
  Documentation: PM: Discourage use of deprecated macros
  PM: sleep: Use sysfs_emit() and sysfs_emit_at() in "show" functions
  PM: hibernate: Use sysfs_emit() and sysfs_emit_at() in "show" functions

* pm-opp:
  dt-bindings: opp: operating-points-v2-ti-cpu: Update maintainers
  opp: ti: Drop unnecessary of_match_ptr()

* pm-tools:
  pm:cpupower: Add error warning when SWIG is not installed
  MAINTAINERS: Add Maintainers for SWIG Python bindings
  pm:cpupower: Include test_raw_pylibcpupower.py
  pm:cpupower: Add SWIG bindings files for libcpupower
  pm:cpupower: Add missing powercap_set_enabled() stub function
  pm-graph: Update directory handling and installation process in Makefile
  pm-graph: Make git ignore sleepgraph.py artifacts
  tools/cpupower: display residency value in idle-info
2024-09-11 19:02:23 +02:00
Rob Herring (Arm)
84e927aa67 opp: ti: Drop unnecessary of_match_ptr()
of_match_ptr() is not necessary as the driver is always enabled for DT.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-09-04 20:43:41 +05:30
Ulf Hansson
9ec87c5957 OPP: Fix support for required OPPs for multiple PM domains
It has turned out that having _set_required_opps() to recursively call
dev_pm_opp_set_opp() to set the required OPPs, doesn't really work as well
as we expected.

More precisely, at each recursive call to dev_pm_opp_set_opp() we are
changing an OPP for a required_dev that belongs to a required-OPP table.
The problem with this, is that we may have several devices sharing the same
required-OPP table, which leads to an incorrect behaviour in regards to
aggregating the per device votes.

To fix the problem for a required-OPP table belonging to a PM domain, which
is the only existing usecase for now, let's simply replace the call to
dev_pm_opp_set_opp() in _set_required_opps() by a call to _set_opp_level().

Moving forward we may potentially need to add support for other types of
required-OPP tables. In this case, the aggregation needs to be thought of.

Fixes: e37440e7e2 ("OPP: Call dev_pm_opp_set_opp() for required OPPs")
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20240822224547.385095-2-ulf.hansson@linaro.org
2024-08-23 11:57:44 +02:00
Rafael J. Wysocki
a02bed4183 Merge branches 'pm-opp' and 'pm-tools'
Merge OPP (operating performance points) and tooling updates for
6.11-rc1:

 - Fix missing cleanup on error in _opp_attach_genpd() (Viresh Kumar).

 - Introduce an OF helper function to inform if required-opps is used
   and drop a redundant in-parameter to _set_opp_level() (Ulf Hansson).

 - Update pm-graph to v5.12 which includes fixes and major code revamp
   for python3.12 (Todd Brandt).

 - Address several assorted issues in the cpupower utility (Roman
   Storozhenko).

* pm-opp:
  OPP: Introduce an OF helper function to inform if required-opps is used
  OPP: Drop a redundant in-parameter to _set_opp_level()
  OPP: Fix missing cleanup on error in _opp_attach_genpd()

* pm-tools:
  cpupower: fix lib default installation path
  cpupower: Disable direct build of the 'bench' subproject
  cpupower: Change the var type of the 'monitor' subcommand display mode
  cpupower: Remove absent 'v' parameter from monitor man page
  cpupower: Improve cpupower build process description
  cpupower: Add 'help' target to the main Makefile
  cpupower: Replace a dead reference link with working ones
  pm-graph: v5.12, code revamp for python3.12
  pm-graph: v5.12, fixes
2024-07-15 18:55:14 +02:00
Ulf Hansson
e3943f00af OPP: Introduce an OF helper function to inform if required-opps is used
As being shown from a subsequent change to genpd, it's useful to understand
if a device's OF node has an OPP-table described and whether it contains
OPP nodes that makes use of the required-opps DT property.

For this reason, let's introduce an OPP OF helper function called
dev_pm_opp_of_has_required_opp().

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-06-26 11:17:20 +05:30
Ulf Hansson
0d865221c8 OPP: Drop a redundant in-parameter to _set_opp_level()
The in-parameter "opp_table" isn't needed by _set_opp_level(). Let's
therefore drop it.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-06-25 16:57:41 +05:30
Primoz Fiser
3a1ac6b8f6 OPP: ti: Fix ti_opp_supply_probe wrong return values
Function ti_opp_supply_probe() since commit 6baee034cb ("OPP: ti:
Migrate to dev_pm_opp_set_config_regulators()") returns wrong values
when all goes well and hence driver probing eventually fails.

Fixes: 6baee034cb ("OPP: ti: Migrate to dev_pm_opp_set_config_regulators()")
Signed-off-by: Primoz Fiser <primoz.fiser@norik.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-06-11 10:58:48 +05:30
Viresh Kumar
d86a2f0800 OPP: Fix missing cleanup on error in _opp_attach_genpd()
A recent commit updated the code mistakenly to return directly on
errors, without doing the required cleanups. Fix it.

Fixes: 2a56c462fe ("OPP: Fix required_opp_tables for multiple genpds using same table")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202405180016.4fbn86bm-lkp@intel.com/
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-05-28 11:54:29 +05:30
Rafael J. Wysocki
8bd6d5f1fa OPP Updates for 6.10
- Fix required_opp_tables for multiple genpds using same table (Viresh
   Kumar).
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Merge tag 'opp-updates-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm into pm-opp

Merge OPP updates for v6.10 from Viresh Kumar:

"- Fix required_opp_tables for multiple genpds using same table (Viresh
   Kumar)."

* tag 'opp-updates-6.10' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  OPP: Fix required_opp_tables for multiple genpds using same table
2024-05-17 13:01:24 +02:00
Viresh Kumar
2a56c462fe OPP: Fix required_opp_tables for multiple genpds using same table
The required_opp_tables parsing is not perfect, as the OPP core does the
parsing solely based on the DT node pointers.

The core sets the required_opp_tables entry to the first OPP table in
the "opp_tables" list, that matches with the node pointer.

If the target DT OPP table is used by multiple devices and they all
create separate instances of 'struct opp_table' from it, then it is
possible that the required_opp_tables entry may be set to the incorrect
sibling device.

Unfortunately, there is no clear way to initialize the right values
during the initial parsing and we need to do this at a later point of
time.

Cross check the OPP table again while the genpds are attached and fix
them if required.

Also add a new API for the genpd core to fetch the device pointer for
the genpd.

Cc: Thorsten Leemhuis <regressions@leemhuis.info>
Reported-by: Vladimir Lypak <vladimir.lypak@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=218682
Co-developed-by: Vladimir Lypak <vladimir.lypak@gmail.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2024-05-17 12:22:46 +02:00
Lukasz Luba
e3ac0f367d OPP: OF: Export dev_opp_pm_calc_power() for usage from EM
There are device drivers which can modify voltage values for OPPs. It
could be due to the chip binning and those drivers have specific chip
knowledge about it. This adjustment can happen after Energy Model is
registered, thus EM can have stale data about power.

Export dev_opp_pm_calc_power() which can be used by Energy Model to
calculate new power with the new voltage for OPPs.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Dietmar Eggemann <dietmar.eggemann@arm.com>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2024-04-08 16:05:14 +02:00
Viresh Kumar
28330ceb95 OPP: debugfs: Fix warning around icc_get_name()
If the kernel isn't built with interconnect support, icc_get_name()
returns NULL and we get following warning:

drivers/opp/debugfs.c: In function 'bw_name_read':
drivers/opp/debugfs.c:43:42: error: '%.62s' directive argument is null [-Werror=format-overflow=]
         i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path));

Fix it.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202402141313.81ltVF5g-lkp@intel.com/
Fixes: 0430b1d570 ("opp: Expose bandwidth information via debugfs")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
2024-03-11 10:39:24 +05:30
Viresh Kumar
992e883359 OPP: debugfs: Fix warning with W=1 builds
We currently get the following warning:

debugfs.c:105:54: error: '%d' directive output may be truncated writing between 1 and 11 bytes into a region of size 8 [-Werror=format-truncation=]
                 snprintf(name, sizeof(name), "supply-%d", i);
                                                      ^~
debugfs.c:105:46: note: directive argument in the range [-2147483644, 2147483646]
                 snprintf(name, sizeof(name), "supply-%d", i);
                                              ^~~~~~~~~~~
debugfs.c:105:17: note: 'snprintf' output between 9 and 19 bytes into a destination of size 15
                 snprintf(name, sizeof(name), "supply-%d", i);

Fix this and other potential issues it by allocating larger arrays.
Use the exact string format to allocate the arrays without getting into
these issues again.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202402141313.81ltVF5g-lkp@intel.com/
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
2024-03-11 10:39:24 +05:30
Sibi Sankar
abb3f9717a OPP: Extend dev_pm_opp_data with turbo support
Let's extend the dev_pm_opp_data with a turbo variable, to allow users to
specify if it's a boost frequency for a dynamically added OPP.

Signed-off-by: Sibi Sankar <quic_sibis@quicinc.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-03-11 10:39:24 +05:30
Viresh Kumar
dcfec12b67 OPP: Rename 'rate_clk_single'
The field's name isn't clear enough. Rename it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-01-05 15:55:41 +05:30
Viresh Kumar
7269c250db OPP: Pass rounded rate to _set_opp()
The OPP core finds the eventual frequency to set with the help of
clk_round_rate() and the same was earlier getting passed to _set_opp()
and that's what would get configured.

The commit 1efae8d2e7 ("OPP: Make dev_pm_opp_set_opp() independent of
frequency") mistakenly changed that. Fix it.

Fixes: 1efae8d2e7 ("OPP: Make dev_pm_opp_set_opp() independent of frequency")
Cc: v5.18+ <stable@vger.kernel.org> # v6.0+
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-01-05 15:53:28 +05:30
Viresh Kumar
0b40dd3bcf OPP: Relocate dev_pm_opp_sync_regulators()
Move this to a more relevant place in the file. No functional changes.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-01-05 15:52:33 +05:30
Viresh Kumar
3b82024c5b OPP: Move dev_pm_opp_icc_bw to internal opp.h
It isn't used by any driver or API, privatize it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2024-01-03 16:21:42 +05:30
Bryan O'Donoghue
ab7a781fd6 OPP: Fix _set_required_opps when opp is NULL
_set_required_opps can be called with opp NULL in _disable_opp_table().

commit e37440e7e2 ("OPP: Call dev_pm_opp_set_opp() for required OPPs")
requires the opp pointer to be non-NULL to function.

[   81.253439] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000048
[   81.438407] Hardware name: Qualcomm Technologies, Inc. Robotics RB5 (DT)
[   81.445296] Workqueue: pm pm_runtime_work
[   81.449446] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[   81.456609] pc : _set_required_opps+0x178/0x28c
[   81.461288] lr : _set_required_opps+0x178/0x28c
[   81.465962] sp : ffff80008078bb00
[   81.469375] x29: ffff80008078bb00 x28: ffffd1cd71bfe308 x27: 0000000000000000
[   81.476730] x26: ffffd1cd70ebc578 x25: ffffd1cd70a08710 x24: 00000000ffffffff
[   81.484083] x23: 00000000ffffffff x22: 0000000000000000 x21: ffff56ff892b3c48
[   81.491435] x20: ffff56f1071c10 x19: 0000000000000000 x18: ffffffffffffffff
[   81.498788] x17: 2030207865646e69 x16: 2030303131207370 x15: 706f5f6465726975
[   81.506141] x14: 7165725f7465735f x13: ffff5700f5c00000 x12: 00000000000008ac
[   81.513495] x11: 00000000000002e4 x10: ffff5700f6700000 x9 : ffff5700f5c00000
[   81.520848] x8 : 00000000fffdffff x7 : ffff5700f6700000 x6 : 80000000fffe0000
[   81.528200] x5 : ffff5700fef40d08 x4 : 0000000000000000 x3 : 0000000000000000
[   81.535551] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff56ff81298f80
[   81.542904] Call trace:
[   81.545437]  _set_required_opps+0x178/0x28c
[   81.549754]  _set_opp+0x3fc/0x5c0
[   81.553181]  dev_pm_opp_set_rate+0x90/0x26c
[   81.557498]  core_power_v4+0x44/0x15c [venus_core]
[   81.562509]  venus_runtime_suspend+0x40/0xd0 [venus_core]
[   81.568135]  pm_generic_runtime_suspend+0x2c/0x44
[   81.572983]  __rpm_callback+0x48/0x1d8
[   81.576852]  rpm_callback+0x6c/0x78
[   81.580453]  rpm_suspend+0x10c/0x570
[   81.584143]  pm_runtime_work+0xc4/0xc8
[   81.588011]  process_one_work+0x138/0x244
[   81.592153]  worker_thread+0x320/0x438
[   81.596021]  kthread+0x110/0x114
[   81.599355]  ret_from_fork+0x10/0x20
[   81.603052] Code: f10000ff fa5410e0 54fffbe1 97f05ae8 (f94026c5)
[   81.609317] ---[ end trace 0000000000000000 ]---

Fix it.

Fixes: e37440e7e2 ("OPP: Call dev_pm_opp_set_opp() for required OPPs")
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
[ Viresh: Implemented the fix differently ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
2023-12-28 10:55:27 +05:30
Viresh Kumar
ba367479c7 OPP: The level field is always of unsigned int type
By mistake, dev_pm_opp_find_level_floor() used the level parameter as
unsigned long instead of unsigned int. Fix it.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2023-12-27 13:27:30 +05:30
Viresh Kumar
19cc8b1819 OPP: Check for invalid OPP in dev_pm_opp_find_level_ceil()
_find_key_ceil() may return an error and that must be checked before
passing the same to dev_pm_opp_put().

Fixes: 41907aa4ae37 ("OPP: Level zero is valid")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2023-11-28 16:03:37 +05:30
Viresh Kumar
925141432f OPP: Don't set OPP recursively for a parent genpd
Like other frameworks (clk, regulator, etc.) genpd core too takes care
of propagation to performance state to parent genpds. The OPP core
shouldn't attempt the same, or it may result in undefined behavior.

Add checks at various places to take care of the same.

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2023-11-28 16:03:25 +05:30
Viresh Kumar
e37440e7e2 OPP: Call dev_pm_opp_set_opp() for required OPPs
Configuring the required OPP was never properly implemented, we just
took an exception for genpds and configured them directly, while leaving
out all other required OPP types.

Now that a standard call to dev_pm_opp_set_opp() takes care of
configuring the opp->level too, the special handling for genpds can be
avoided by simply calling dev_pm_opp_set_opp() for the required OPPs,
which shall eventually configure the corresponding level for genpds.

This also makes it possible for us to configure other type of required
OPPs (no concrete users yet though), via the same path. This is how
other frameworks take care of parent nodes, like clock, regulators, etc,
where we recursively call the same helper.

In order to call dev_pm_opp_set_opp() for the virtual genpd devices,
they must share the OPP table of the genpd. Call _add_opp_dev() for them
to get that done.

This commit also extends the struct dev_pm_opp_config to pass required
devices, for non-genpd cases, which can be used to call
dev_pm_opp_set_opp() for the non-genpd required devices.

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2023-11-28 16:03:19 +05:30
Viresh Kumar
6d366d0e54 OPP: Use _set_opp_level() for single genpd case
There are two genpd (as required-opp) cases that we need to handle,
devices with a single genpd and ones with multiple genpds.

The multiple genpds case is clear, where the OPP core calls
dev_pm_domain_attach_by_name() for them and uses the virtual devices
returned by this helper to call dev_pm_domain_set_performance_state()
later to change the performance state.

The single genpd case however requires special handling as we need to
use the same `dev` structure (instead of a virtual one provided by genpd
core) for setting the performance state via
dev_pm_domain_set_performance_state().

As we move towards more generic code to take care of the required OPPs,
where we will recursively call dev_pm_opp_set_opp() for all the required
OPPs, the above special case becomes a problem.

It doesn't make sense for a device's DT entry to have both "opp-level"
and single "required-opps" entry pointing to a genpd's OPP, as that
would make the OPP core call dev_pm_domain_set_performance_state() for
two different values for the same device structure. And so we can reuse
the 'opp->level" field in such a case and call _set_opp_level() for the
device.

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2023-11-28 16:03:15 +05:30
Viresh Kumar
073d3d2ca7 OPP: Level zero is valid
The level zero can be used by some OPPs to drop performance state vote
for the device. It is perfectly fine to allow the same.

_set_opp_level() considers it as an invalid value currently and returns
early.

In order to support this properly, initialize the level field with
U32_MAX, which denotes unused level field.

Reported-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Stephan Gerhold <stephan.gerhold@kernkonzept.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2023-11-28 16:03:04 +05:30
Rob Herring
4c58e9d85c opp: ti: Use device_get_match_data()
Use preferred device_get_match_data() instead of of_match_device() to
get the driver match data. With this, adjust the includes to explicitly
include the correct headers.

As this driver only does DT based matching, of_match_device() will never
return NULL if we've gotten to probe(). Therefore, the NULL check and
error return for it can be dropped.

Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2023-11-23 11:28:46 +05:30
Viresh Kumar
5ea4911359 OPP: No need to defer probe from _opp_attach_genpd()
When the new interface for attaching genpd's via the OPP core was added,
it was possible for required_opp_count to be zero, but not anymore.

Remove the unused check.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-10-17 11:11:28 +05:30
Viresh Kumar
48b5aaec59 OPP: Remove genpd_virt_dev_lock
All the config operations for OPP tables share common code paths now and
none of the other ones have such protection in place. Either all should
have it or none.

The understanding here is that user won't clear the OPP configs while
still using them and so such a case won't happen. We can always come
back and use a wider lock for all resource types if required.

Also fix the error on failing to allocate memory.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-10-17 11:11:28 +05:30
Viresh Kumar
c2bebf9804 OPP: Reorder code in _opp_set_required_opps_genpd()
Reorder code in _opp_set_required_opps_genpd() to reduce duplicate code.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-10-17 11:11:23 +05:30
Viresh Kumar
96104046d1 OPP: Add _link_required_opps() to avoid code duplication
Factor out _link_required_opps() to remove duplicate code. No functional
change.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-10-16 16:06:09 +05:30
Viresh Kumar
8e6db129eb OPP: Fix formatting of if/else block
Add {} to both if else blocks or none.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
2023-10-16 16:05:51 +05:30
Nathan Chancellor
184ff4f721 OPP: Fix -Wunsequenced in _of_add_opp_table_v1()
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>
2023-10-06 12:49:29 +05:30
Viresh Kumar
3aa8725467 OPP: debugfs: Fix warning with W=1 builds
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>
2023-10-06 12:37:34 +05:30
Viresh Kumar
cca14de569 OPP: Remove doc style comments for internal routines
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>
2023-10-06 12:37:34 +05:30
Krishna chaitanya chundru
a0242c81bb OPP: Add dev_pm_opp_find_level_floor()
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>
2023-10-06 12:37:34 +05:30
Ulf Hansson
0025ff64ff OPP: Extend support for the opp-level beyond required-opps
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>
2023-10-06 12:37:34 +05:30
Ulf Hansson
892c60c6b4 OPP: Switch to use dev_pm_domain_set_performance_state()
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>
2023-10-06 12:37:34 +05:30
Ulf Hansson
3166383da0 OPP: Extend dev_pm_opp_data with a level
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>
2023-10-06 12:37:34 +05:30
Ulf Hansson
248a38d5cc OPP: Add dev_pm_opp_add_dynamic() to allow more flexibility
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>
2023-10-06 12:37:33 +05:30
Viresh Kumar
a5a297918a OPP: Fix argument name in doc comment
The name of the argument is "opp_table" and not "table", fix the
comment.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202308172310.FzcidE4c-lkp@intel.com/
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2023-08-18 10:55:49 +05:30
Manivannan Sadhasivam
d920920f85 OPP: Fix passing 0 to PTR_ERR in _opp_attach_genpd()
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>
2023-07-24 13:31:25 +05:30
Manivannan Sadhasivam
7ddd8deb1c OPP: Fix potential null ptr dereference in dev_pm_opp_get_required_pstate()
"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>
2023-07-24 13:31:17 +05:30
Viresh Kumar
746de82550 OPP: Reuse dev_pm_opp_get_freq_indexed()
Reuse dev_pm_opp_get_freq_indexed() from dev_pm_opp_get_freq().

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
2023-07-24 13:27:12 +05:30
Viresh Kumar
034d6aac21 OPP: Update _read_freq() to return the correct frequency
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>
2023-07-24 13:27:03 +05:30
Viresh Kumar
a5893928bb OPP: Add dev_pm_opp_find_freq_exact_indexed()
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>
2023-07-24 13:22:39 +05:30
Manivannan Sadhasivam
5f756d03e2 OPP: Introduce dev_pm_opp_get_freq_indexed() API
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>
2023-07-24 13:22:39 +05:30