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SubjectRe: [thermal-next PATCH 2/2] thermal: qcom: tsens: simplify debugfs init function
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On 4/28/21 2:48 PM, Ansuel Smith wrote:
> On Wed, Apr 28, 2021 at 12:47:30PM -0400, Thara Gopinath wrote:
>> Hi,
>>
>> Please include a cover letter next time describing the patch series.
>>
>
> Yes sorry, I tought that for a small series (2 patch) it wasn't needed.
>
>> On 4/18/21 9:29 PM, Ansuel Smith wrote:
>>> Simplify debugfs init function.
>>> - Drop useless variables
>>> - Add check for existing dev directory.
>>> - Fix wrong version in dbg_version_show (with version 0.0.0, 0.1.0 was
>>> incorrectly reported)
>>>
>>> Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
>>> ---
>>> drivers/thermal/qcom/tsens.c | 16 +++++++---------
>>> 1 file changed, 7 insertions(+), 9 deletions(-)
>>>
>>> diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
>>> index f9d50a67e..b086d1496 100644
>>> --- a/drivers/thermal/qcom/tsens.c
>>> +++ b/drivers/thermal/qcom/tsens.c
>>> @@ -692,7 +692,7 @@ static int dbg_version_show(struct seq_file *s, void *data)
>>> return ret;
>>> seq_printf(s, "%d.%d.%d\n", maj_ver, min_ver, step_ver);
>>> } else {
>>> - seq_puts(s, "0.1.0\n");
>>> + seq_printf(s, "0.%d.0\n", priv->feat->ver_major);
>>> }
>>> return 0;
>>> @@ -704,21 +704,19 @@ 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)
>>> + if (!debugfs_lookup("version", priv->debug_root))
>>> 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);
>>
>> Unconditionally creating priv->debug here is correct. The below if
>> (!priv->debug) will never be true because as per your patch 1, we call
>> tsens_debug_init once per instance of tsens.
>>
>
> You are right, will send a v2 if everything else is good. What do you
> think?

I have not tested this yet. The clean up itself looks okay to me.
My question is have you tried this with 8960 tsens ? That is the only
version of tsens that does not use init_common and hence looks to me
that a debug interface is not created. I don't think this should be a
problem though. So if you can fix the above, it is a go ahead from me.



--
Warm Regards
Thara

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