devicetree.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Chunyan Zhang <zhang.chunyan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
To: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Ulf Hansson <ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>,
	Chunyan Zhang
	<zhang.lyra-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: [PATCH v3 0/5] Add regulator suspend and resume support
Date: Fri, 12 Jan 2018 18:18:20 +0800	[thread overview]
Message-ID: <1515752305-15907-1-git-send-email-zhang.chunyan@linaro.org> (raw)

Some systems need to set regulators to specific states when they enter low
power modes, especially around CPUs.

Currently the regulator driver, for suspend and resume features, provides
two functions which are exported for being called directly by any modules
or subsystems when they thought the regulator should be entering into
suspend states.

This patchset adds hooks to PM suspend core and provides suspend/resume
callback functions to regulator device, for those who can be switched
off or set low voltage in suspend states only need to implement the
callback functions in the driver, and set the right configurations for
suspend states via device tree and the APIs which regulator core
driver provides.

Those drivers who use the old interfaces - i.e. regulator_suspend_prepare()
and regulator_suspend_finish() should stop using that, since we leave these
two functions empty and plan to remove them one day in the future.

Any comments would be greatly appreciated.

Thanks,
Chunyan

Changes from V1: (https://lkml.org/lkml/2017/12/21/9)
* Rephrased the commit message of patch 0001;
* Declared the property 'regulator-suspend-microvolt' deperated and documented
  the way recommended;
* Revised of_regulator.c, use suspend_state::min_uV as default suspend
  voltage if the property 'regulator-suspend-microvolt' is not used.

Changes from V2: (https://lkml.org/lkml/2018/1/4/75)
* Correct the typo;
* Removed redundant comments;
* Export regulator_suspend_enable/disable(), on't call these two functions in
  regulator_set_suspend_voltage() instead;
* Checking if rstate->min_uV == rstate->max_uV instead of checking the flag.

Chunyan Zhang (5):
  bindings: regulator: added support for suspend states
  regulator: make regulator voltage be an array to support more states
  drivers: regulator: leave one item to record whether regulator is
    enabled
  drivers: regulator: empty the old suspend functions
  regulator: add PM suspend and resume hooks

 .../devicetree/bindings/regulator/regulator.txt    |  15 +-
 drivers/regulator/core.c                           | 336 ++++++++++++++-------
 drivers/regulator/internal.h                       |  18 +-
 drivers/regulator/of_regulator.c                   |  20 +-
 include/linux/regulator/driver.h                   |   2 +
 include/linux/regulator/machine.h                  |  37 ++-
 6 files changed, 302 insertions(+), 126 deletions(-)

-- 
2.7.4

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

             reply	other threads:[~2018-01-12 10:18 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-12 10:18 Chunyan Zhang [this message]
2018-01-12 10:18 ` [PATCH v3 1/5] bindings: regulator: added support for suspend states Chunyan Zhang
2018-01-19 22:11   ` Rob Herring
2018-01-22  2:16     ` Chunyan Zhang
     [not found]   ` <1515752305-15907-2-git-send-email-zhang.chunyan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2018-01-22  7:59     ` [PATCH V4 " Chunyan Zhang
2018-01-22 19:50       ` Rob Herring
2018-01-23 11:28         ` Mark Brown
     [not found]       ` <1516607961-379-1-git-send-email-zhang.chunyan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2018-01-26 15:26         ` Applied "regulator: added support for suspend states" to the regulator tree Mark Brown
2018-01-12 10:18 ` [PATCH v3 2/5] regulator: make regulator voltage be an array to support more states Chunyan Zhang
2018-01-12 10:18 ` [PATCH v3 3/5] drivers: regulator: leave one item to record whether regulator is enabled Chunyan Zhang
2018-01-26 15:26   ` Applied "regulator: leave one item to record whether regulator is enabled" to the regulator tree Mark Brown
     [not found] ` <1515752305-15907-1-git-send-email-zhang.chunyan-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2018-01-12 10:18   ` [PATCH v3 4/5] drivers: regulator: empty the old suspend functions Chunyan Zhang
2018-01-12 10:18 ` [PATCH v3 5/5] regulator: add PM suspend and resume hooks Chunyan Zhang
2018-01-12 10:23 ` [PATCH v3 0/5] Add regulator suspend and resume support Chunyan Zhang

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1515752305-15907-1-git-send-email-zhang.chunyan@linaro.org \
    --to=zhang.chunyan-qsej5fyqhm4dnm+yrofe0a@public.gmane.org \
    --cc=arnd-r2nGTMty4D4@public.gmane.org \
    --cc=broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
    --cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
    --cc=robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \
    --cc=ulf.hansson-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org \
    --cc=zhang.lyra-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \
    --subject='Re: [PATCH v3 0/5] Add regulator suspend and resume support' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).