[PATCHv3] regulator: pwm-regulator: Make use of the helper function dev_err_probe()

[PATCHv3] regulator: pwm-regulator: Make use of the helper function dev_err_probe()

[Anand Moon]

devm_pwm_get() can return -EPROBE_DEFER if the pwm regulator is not
ready yet. Use dev_err_probe() for pwm regulator resources
to indicate the deferral reason when waiting for the
resource to come up.

Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
V2 - Fix the return message and drop the FIX tag in commit.
V1 - Fix the wrong probe defer for devm_regulator_register.
   - Fix the commit message.
---
 drivers/regulator/pwm-regulator.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c
index 7629476d94ae..9e2784ce8f67 100644
--- a/drivers/regulator/pwm-regulator.c
+++ b/drivers/regulator/pwm-regulator.c
@@ -353,13 +353,8 @@ static int pwm_regulator_probe(struct platform_device *pdev)
 
 	drvdata->pwm = devm_pwm_get(&pdev->dev, NULL);
 	if (IS_ERR(drvdata->pwm)) {
-		ret = PTR_ERR(drvdata->pwm);
-		if (ret == -EPROBE_DEFER)
-			dev_dbg(&pdev->dev,
-				"Failed to get PWM, deferring probe\n");
-		else
-			dev_err(&pdev->dev, "Failed to get PWM: %d\n", ret);
-		return ret;
+		return dev_err_probe(&pdev->dev, PTR_ERR(drvdata->pwm),
+				     "Failed to get PWM\n");
 	}
 
 	if (init_data->constraints.boot_on || init_data->constraints.always_on)
-- 
2.33.0


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Re: [PATCHv3] regulator: pwm-regulator: Make use of the helper function dev_err_probe()

[Martin Blumenstingl]

Hi Anand,

On Tue, Sep 21, 2021 at 11:27 PM Anand Moon <linux.amoon@gmail.com> wrote:
[...]
> @@ -353,13 +353,8 @@ static int pwm_regulator_probe(struct platform_device *pdev)
>
>         drvdata->pwm = devm_pwm_get(&pdev->dev, NULL);
>         if (IS_ERR(drvdata->pwm)) {
> -               ret = PTR_ERR(drvdata->pwm);
> -               if (ret == -EPROBE_DEFER)
> -                       dev_dbg(&pdev->dev,
> -                               "Failed to get PWM, deferring probe\n");
> -               else
> -                       dev_err(&pdev->dev, "Failed to get PWM: %d\n", ret);
> -               return ret;
> +               return dev_err_probe(&pdev->dev, PTR_ERR(drvdata->pwm),
> +                                    "Failed to get PWM\n");
>         }
From functional perspective you're patch is looking good now.
I just noticed that the coding-style in the pwm-regulator driver is
not not use any curly brackets for the if block when there's only one
statement

with the curly brackets removed (and if there are no other changes to
this patch) then you can add my:
Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>


Best regards,
Martin

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Re: [PATCHv3] regulator: pwm-regulator: Make use of the helper function dev_err_probe()

[Anand Moon]

Hi Martin,

On Sat, 25 Sept 2021 at 22:42, Martin Blumenstingl
<martin.blumenstingl@googlemail.com> wrote:
>
> Hi Anand,
>
> On Tue, Sep 21, 2021 at 11:27 PM Anand Moon <linux.amoon@gmail.com> wrote:
> [...]
> > @@ -353,13 +353,8 @@ static int pwm_regulator_probe(struct platform_device *pdev)
> >
> >         drvdata->pwm = devm_pwm_get(&pdev->dev, NULL);
> >         if (IS_ERR(drvdata->pwm)) {
> > -               ret = PTR_ERR(drvdata->pwm);
> > -               if (ret == -EPROBE_DEFER)
> > -                       dev_dbg(&pdev->dev,
> > -                               "Failed to get PWM, deferring probe\n");
> > -               else
> > -                       dev_err(&pdev->dev, "Failed to get PWM: %d\n", ret);
> > -               return ret;
> > +               return dev_err_probe(&pdev->dev, PTR_ERR(drvdata->pwm),
> > +                                    "Failed to get PWM\n");
> >         }
> From functional perspective you're patch is looking good now.
> I just noticed that the coding-style in the pwm-regulator driver is
> not not use any curly brackets for the if block when there's only one
> statement
>
> with the curly brackets removed (and if there are no other changes to
> this patch) then you can add my:
> Acked-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
>
Thanks, I will update the patch in the next version.
>
> Best regards,
> Martin

Thanks
-Anand

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