Unverified Commit 48b6faae authored by Mark Brown's avatar Mark Brown
Browse files

regulator: new API for voltage reference supplies 

Merge series from David Lechner <dlechner@baylibre.com>:

In the IIO subsystem, we noticed a pattern in many drivers where we need
to get, enable and get the voltage of a supply that provides a reference
voltage. In these cases, we only need the voltage and not a handle to
the regulator. Another common pattern is for chips to have an internal
reference voltage that is used when an external reference is not
available. There are also a few drivers outside of IIO that do the same.

So we would like to propose a new regulator consumer API to handle these
specific cases to avoid repeating the same boilerplate code in multiple
drivers.

As an example of how these functions are used, I have included a few
patches to consumer drivers. But to avoid a giant patch bomb, I have
omitted the iio/adc and iio/dac patches I have prepared from this
series. I will send those separately but these will add 36 more users
of devm_regulator_get_enable_read_voltage() in addition to the 6 here.
In total, this will eliminate nearly 1000 lines of similar code and will
simplify writing and reviewing new drivers in the future.
parents 38bcec0e d72fd522

.mailmap

+9 −2
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ Adam Oldham <oldhamca@gmail.com> 
Adam Radford <aradford@gmail.com>

Adriana Reus <adi.reus@gmail.com> <adriana.reus@intel.com>

Adrian Bunk <bunk@stusta.de>

Ajay Kaher <ajay.kaher@broadcom.com> <akaher@vmware.com>

Akhil P Oommen <quic_akhilpo@quicinc.com> <akhilpo@codeaurora.org>

Alan Cox <alan@lxorguk.ukuu.org.uk>

Alan Cox <root@hraefn.swansea.linux.org.uk>
@@ -36,6 +37,7 @@ Alexei Avshalom Lazar <quic_ailizaro@quicinc.com> <ailizaro@codeaurora.org> 
Alexei Starovoitov <ast@kernel.org> <alexei.starovoitov@gmail.com>

Alexei Starovoitov <ast@kernel.org> <ast@fb.com>

Alexei Starovoitov <ast@kernel.org> <ast@plumgrid.com>

Alexey Makhalov <alexey.amakhalov@broadcom.com> <amakhalov@vmware.com>

Alex Hung <alexhung@gmail.com> <alex.hung@canonical.com>

Alex Shi <alexs@kernel.org> <alex.shi@intel.com>

Alex Shi <alexs@kernel.org> <alex.shi@linaro.org>
@@ -110,6 +112,7 @@ Brendan Higgins <brendan.higgins@linux.dev> <brendanhiggins@google.com> 
Brian Avery <b.avery@hp.com>

Brian King <brking@us.ibm.com>

Brian Silverman <bsilver16384@gmail.com> <brian.silverman@bluerivertech.com>

Bryan Tan <bryan-bt.tan@broadcom.com> <bryantan@vmware.com>

Cai Huoqing <cai.huoqing@linux.dev> <caihuoqing@baidu.com>

Can Guo <quic_cang@quicinc.com> <cang@codeaurora.org>

Carl Huang <quic_cjhuang@quicinc.com> <cjhuang@codeaurora.org>
@@ -340,7 +343,8 @@ Lee Jones <lee@kernel.org> <joneslee@google.com> 
Lee Jones <lee@kernel.org> <lee.jones@canonical.com>

Lee Jones <lee@kernel.org> <lee.jones@linaro.org>

Lee Jones <lee@kernel.org> <lee@ubuntu.com>

Leonard Crestez <leonard.crestez@nxp.com> Leonard Crestez <cdleonard@gmail.com>

Leonard Crestez <cdleonard@gmail.com> <leonard.crestez@nxp.com>

Leonard Crestez <cdleonard@gmail.com> <leonard.crestez@intel.com>

Leonardo Bras <leobras.c@gmail.com> <leonardo@linux.ibm.com>

Leonard Göhrs <l.goehrs@pengutronix.de>

Leonid I Ananiev <leonid.i.ananiev@intel.com>
@@ -497,7 +501,8 @@ Prasad Sodagudi <quic_psodagud@quicinc.com> <psodagud@codeaurora.org> 
Punit Agrawal <punitagrawal@gmail.com> <punit.agrawal@arm.com>

Qais Yousef <qyousef@layalina.io> <qais.yousef@imgtec.com>

Qais Yousef <qyousef@layalina.io> <qais.yousef@arm.com>

Quentin Monnet <quentin@isovalent.com> <quentin.monnet@netronome.com>

Quentin Monnet <qmo@kernel.org> <quentin.monnet@netronome.com>

Quentin Monnet <qmo@kernel.org> <quentin@isovalent.com>

Quentin Perret <qperret@qperret.net> <quentin.perret@arm.com>

Rafael J. Wysocki <rjw@rjwysocki.net> <rjw@sisk.pl>

Rajeev Nandan <quic_rajeevny@quicinc.com> <rajeevny@codeaurora.org>
@@ -527,6 +532,7 @@ Rocky Liao <quic_rjliao@quicinc.com> <rjliao@codeaurora.org> 
Roman Gushchin <roman.gushchin@linux.dev> <guro@fb.com>

Roman Gushchin <roman.gushchin@linux.dev> <guroan@gmail.com>

Roman Gushchin <roman.gushchin@linux.dev> <klamm@yandex-team.ru>

Ronak Doshi <ronak.doshi@broadcom.com> <doshir@vmware.com>

Muchun Song <muchun.song@linux.dev> <songmuchun@bytedance.com>

Muchun Song <muchun.song@linux.dev> <smuchun@gmail.com>

Ross Zwisler <zwisler@kernel.org> <ross.zwisler@linux.intel.com>
@@ -649,6 +655,7 @@ Viresh Kumar <vireshk@kernel.org> <viresh.kumar@st.com> 
Viresh Kumar <vireshk@kernel.org> <viresh.linux@gmail.com>

Viresh Kumar <viresh.kumar@linaro.org> <viresh.kumar@linaro.org>

Viresh Kumar <viresh.kumar@linaro.org> <viresh.kumar@linaro.com>

Vishnu Dasa <vishnu.dasa@broadcom.com> <vdasa@vmware.com>

Vivek Aknurwar <quic_viveka@quicinc.com> <viveka@codeaurora.org>

Vivien Didelot <vivien.didelot@gmail.com> <vivien.didelot@savoirfairelinux.com>

Vlad Dogaru <ddvlad@gmail.com> <vlad.dogaru@intel.com>

Documentation/admin-guide/kernel-parameters.txt

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@@ -6599,7 +6599,7 @@ 
			To turn off having tracepoints sent to printk,

			 echo 0 > /proc/sys/kernel/tracepoint_printk

			Note, echoing 1 into this file without the

			tracepoint_printk kernel cmdline option has no effect.

			tp_printk kernel cmdline option has no effect.



			The tp_printk_stop_on_boot (see below) can also be used

			to stop the printing of events to console at

Documentation/admin-guide/mm/zswap.rst

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@@ -155,7 +155,7 @@ Setting this parameter to 100 will disable the hysteresis. 


Some users cannot tolerate the swapping that comes with zswap store failures

and zswap writebacks. Swapping can be disabled entirely (without disabling

zswap itself) on a cgroup-basis as follows:

zswap itself) on a cgroup-basis as follows::



	echo 0 > /sys/fs/cgroup/<cgroup-name>/memory.zswap.writeback
@@ -166,7 +166,7 @@ writeback (because the same pages might be rejected again and again). 
When there is a sizable amount of cold memory residing in the zswap pool, it

can be advantageous to proactively write these cold pages to swap and reclaim

the memory for other use cases. By default, the zswap shrinker is disabled.

User can enable it as follows:

User can enable it as follows::



  echo Y > /sys/module/zswap/parameters/shrinker_enabled

Documentation/arch/x86/resctrl.rst

+1 −1
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@@ -574,7 +574,7 @@ Memory b/w domain is L3 cache. 
	MB:<cache_id0>=bandwidth0;<cache_id1>=bandwidth1;...



Memory bandwidth Allocation specified in MiBps

---------------------------------------------

----------------------------------------------



Memory bandwidth domain is L3 cache.

::

Documentation/dev-tools/testing-overview.rst

+2 −0
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@@ -104,6 +104,8 @@ Some of these tools are listed below: 
  KASAN and can be used in production. See Documentation/dev-tools/kfence.rst

* lockdep is a locking correctness validator. See

  Documentation/locking/lockdep-design.rst

* Runtime Verification (RV) supports checking specific behaviours for a given

  subsystem. See Documentation/trace/rv/runtime-verification.rst

* There are several other pieces of debug instrumentation in the kernel, many

  of which can be found in lib/Kconfig.debug