linux-kernel - Re: [PATCH v2] reset: make shared pulsed reset controls re-triggerable

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Message-ID: <48332a44241f3c06966420277060b6048c1f77d0.camel@pengutronix.de>
Date:   Mon, 16 Nov 2020 17:36:15 +0100
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Jerome Brunet <jbrunet@...libre.com>,
        Amjad Ouled-Ameur <aouledameur@...libre.com>,
        Jim Quinlan <james.quinlan@...adcom.com>
Cc:     linux-kernel@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-usb@...r.kernel.org, Kevin Hilman <khilman@...libre.com>
Subject: Re: [PATCH v2] reset: make shared pulsed reset controls
 re-triggerable

On Fri, 2020-11-13 at 16:13 +0100, Jerome Brunet wrote:
> On Fri 13 Nov 2020 at 16:04, Philipp Zabel <p.zabel@...gutronix.de> wrote:
> 
> > On Fri, 2020-11-13 at 00:00 +0100, Amjad Ouled-Ameur wrote:
> > > The current reset framework API does not allow to release what is done by
> > > reset_control_reset(), IOW decrement triggered_count. Add the new
> > > reset_control_rearm() call to do so.
> > > 
> > > When reset_control_reset() has been called once, the counter
> > > triggered_count, in the reset framework, is incremented i.e the resource
> > > under the reset is in-use and the reset should not be done again.
> > > reset_control_rearm() would be the way to state that the resource is
> > > no longer used and, that from the caller's perspective, the reset can be
> > > fired again if necessary.
> > > 
> > > Signed-off-by: Amjad Ouled-Ameur <aouledameur@...libre.com>
> > > Reported-by: Jerome Brunet <jbrunet@...libre.com>
> > > ---
> > > Change since v1: [0]
> > > * Renamed the new call from reset_control_(array_)resettable to 
> > > reset_control_(array_)rearm
> > > * Open-coded reset_control_array_rearm to check for errors before
> > > decrementing triggered_count because we cannot roll back in case an
> > > error occurs while decrementing one of the rstc.
> > > * Reworded the new call's description.
> > 
> > Thank you, applied to reset/next.
> 
> Hi Philipp,
> 
> Would it be possible to get an immutable branch/tag with this ?
> It would allow to move forward on the USB side, without waiting for the
> next rc1.

Here you go,

The following changes since commit 3650b228f83adda7e5ee532e2b90429c03f7b9ec:

  Linux 5.10-rc1 (2020-10-25 15:14:11 -0700)

are available in the Git repository at:

  git://git.pengutronix.de/git/pza/linux.git reset/shared-retrigger

for you to fetch changes up to 557acb3d2cd9c82de19f944f6cc967a347735385:

  reset: make shared pulsed reset controls re-triggerable (2020-11-16 17:05:28 +0100)

----------------------------------------------------------------
Amjad Ouled-Ameur (1):
      reset: make shared pulsed reset controls re-triggerable

 drivers/reset/core.c  | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/reset.h |  1 +
 2 files changed, 74 insertions(+)

regards
Philipp