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[v3,0/3] thermal: qcom: tsens: small fixup for debugfs

Message ID 20221022125657.22530-1-ansuelsmth@gmail.com
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Series thermal: qcom: tsens: small fixup for debugfs | expand

Message

Christian Marangi Oct. 22, 2022, 12:56 p.m. UTC 
This is a small series to fixup some bug in how tsens init debufs.

The first patch just handle situation where tsens fails to register and
debugfs are getting registred anyway. When tsens is tried to reprobe
debugs will print a warning as the directory are already there.

The second patch is a fixup for wrong version when the ancient VER_0 is
used.

The third patch is a rework of debugfs structure moving version in the
tsens istance instead of ignoring any other tsens istance if it will
ever be the case in the future of having multiple tsens instance with
different version. It's just futureproof on it's own and also removed
one additional check.

changes v3:
- remove extra space from patch 1
- split patch 2 to 2 different patch
- patch 3 rework wrong debugfs structure
changes v2:
- Changed sob name to new one.

(the resend was actually v2 but i totally forgot that I sent it as v2 with
the sob name fixed... but everything should be good now...)

Christian Marangi (3):
  thermal: qcom: tsens: init debugfs only with successful probe
  thermal: qcom: tsens: fix wrong version id dbg_version_show
  thermal: qcom: tsens: rework debugfs file structure

 drivers/thermal/qcom/tsens.c | 23 +++++++++--------------
 1 file changed, 9 insertions(+), 14 deletions(-)

Comments

Christian Marangi Oct. 22, 2022, 1:10 p.m. UTC | #1 
On Sat, Oct 22, 2022 at 03:08:46PM +0200, Daniel Lezcano wrote:
> On 22/10/2022 14:56, Christian Marangi wrote:
> > The current tsens debugfs structure is composed by:
> > - a tsens dir in debugfs with a version file
> > - a directory for each tsens istance with sensors file to dump all the
> >    sensors value.
> 
> s/istance/instance/
> 
> The patch looks good to me, no need to resend, I'll fix the typos
>

Thanks for picking this, np for fixing typos.

> > This works on the assumption that we have the same version for each
> > istance but this assumption seems fragile and with more than one tsens
> > istance results in the version file not tracking each of them.
> > 
> > A better approach is to just create a subdirectory for each tsens
> > istance and put there version and sensors debugfs file.
> > 
> > Using this new implementation results in less code since debugfs entry
> > are created only on successful tsens probe.
> > 
> > Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
> > ---
> >   drivers/thermal/qcom/tsens.c | 13 +++----------
> >   1 file changed, 3 insertions(+), 10 deletions(-)
> > 
> > diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
> > index 467585c45d34..fc12d7c07de4 100644
> > --- a/drivers/thermal/qcom/tsens.c
> > +++ b/drivers/thermal/qcom/tsens.c
> > @@ -704,21 +704,14 @@ DEFINE_SHOW_ATTRIBUTE(dbg_sensors);
> >   static void tsens_debug_init(struct platform_device *pdev)
> >   {
> >   	struct tsens_priv *priv = platform_get_drvdata(pdev);
> > -	struct dentry *root, *file;
> > -	root = debugfs_lookup("tsens", NULL);
> > -	if (!root)
> > +	priv->debug_root = debugfs_lookup("tsens", NULL);
> > +	if (!priv->debug_root)
> >   		priv->debug_root = debugfs_create_dir("tsens", NULL);
> > -	else
> > -		priv->debug_root = root;
> > -
> > -	file = debugfs_lookup("version", priv->debug_root);
> > -	if (!file)
> > -		debugfs_create_file("version", 0444, priv->debug_root,
> > -				    pdev, &dbg_version_fops);
> >   	/* A directory for each instance of the TSENS IP */
> >   	priv->debug = debugfs_create_dir(dev_name(&pdev->dev), priv->debug_root);
> > +	debugfs_create_file("version", 0444, priv->debug, pdev, &dbg_version_fops);
> >   	debugfs_create_file("sensors", 0444, priv->debug, pdev, &dbg_sensors_fops);
> >   }
> >   #else
> 
> 
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