| Message ID | 1434292172-22129-1-git-send-email-vladimir_zapolskiy@mentor.com |
|---|---|
| State | Not Applicable |
| Headers | show |
Lee, Thierry, On 14.06.2015 17:29, Vladimir Zapolskiy wrote: > Platform PWM backlight data provided by board's device tree should be > complete enough to successfully request a pwm device using pwm_get() > API. This change fixes a bug, when an arbitrary (first found) PWM is > connected to a "pwm-backlight" compatible device, when explicit PWM > device reference is not given. > > Documentation/devicetree/bindings/video/backlight/pwm-backlight.txt > already describes "pwms" as a required property, instead of blind > selection of a potentially wrong PWM reject legacy PWM device > registration request, leave legacy API only for non-dt cases. > > Based on initial implementation done by Dmitry Eremin-Solenikov. > > Reported-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> > Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> > Acked-by: Thierry Reding <thierry.reding@gmail.com> > --- > drivers/video/backlight/pwm_bl.c | 13 +++++++------ > 1 file changed, 7 insertions(+), 6 deletions(-) > > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c > index 57cb9ec..9991cdb 100644 > --- a/drivers/video/backlight/pwm_bl.c > +++ b/drivers/video/backlight/pwm_bl.c > @@ -271,15 +271,16 @@ static int pwm_backlight_probe(struct platform_device *pdev) > } > > pb->pwm = devm_pwm_get(&pdev->dev, NULL); > - if (IS_ERR(pb->pwm)) { > + if (IS_ERR(pb->pwm) && !pdev->dev.of_node) { > dev_err(&pdev->dev, "unable to request PWM, trying legacy API\n"); > pb->legacy = true; > pb->pwm = pwm_request(data->pwm_id, "pwm-backlight"); > - if (IS_ERR(pb->pwm)) { > - dev_err(&pdev->dev, "unable to request legacy PWM\n"); > - ret = PTR_ERR(pb->pwm); > - goto err_alloc; > - } > + } > + > + if (IS_ERR(pb->pwm)) { > + dev_err(&pdev->dev, "unable to request PWM\n"); > + ret = PTR_ERR(pb->pwm); > + goto err_alloc; > } > > dev_dbg(&pdev->dev, "got pwm for backlight\n"); > could you please apply this reviewed and acked change? Thank you in advance. -- With best wishes, Vladimir -- To unsubscribe from this list: send the line "unsubscribe linux-pwm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Sun, 14 Jun 2015, Vladimir Zapolskiy wrote: > Platform PWM backlight data provided by board's device tree should be > complete enough to successfully request a pwm device using pwm_get() > API. This change fixes a bug, when an arbitrary (first found) PWM is > connected to a "pwm-backlight" compatible device, when explicit PWM > device reference is not given. > > Documentation/devicetree/bindings/video/backlight/pwm-backlight.txt > already describes "pwms" as a required property, instead of blind > selection of a potentially wrong PWM reject legacy PWM device > registration request, leave legacy API only for non-dt cases. > > Based on initial implementation done by Dmitry Eremin-Solenikov. > > Reported-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> > Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> > Acked-by: Thierry Reding <thierry.reding@gmail.com> > --- > drivers/video/backlight/pwm_bl.c | 13 +++++++------ > 1 file changed, 7 insertions(+), 6 deletions(-) Applied, thanks. > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c > index 57cb9ec..9991cdb 100644 > --- a/drivers/video/backlight/pwm_bl.c > +++ b/drivers/video/backlight/pwm_bl.c > @@ -271,15 +271,16 @@ static int pwm_backlight_probe(struct platform_device *pdev) > } > > pb->pwm = devm_pwm_get(&pdev->dev, NULL); > - if (IS_ERR(pb->pwm)) { > + if (IS_ERR(pb->pwm) && !pdev->dev.of_node) { > dev_err(&pdev->dev, "unable to request PWM, trying legacy API\n"); > pb->legacy = true; > pb->pwm = pwm_request(data->pwm_id, "pwm-backlight"); > - if (IS_ERR(pb->pwm)) { > - dev_err(&pdev->dev, "unable to request legacy PWM\n"); > - ret = PTR_ERR(pb->pwm); > - goto err_alloc; > - } > + } > + > + if (IS_ERR(pb->pwm)) { > + dev_err(&pdev->dev, "unable to request PWM\n"); > + ret = PTR_ERR(pb->pwm); > + goto err_alloc; > } > > dev_dbg(&pdev->dev, "got pwm for backlight\n");
On Tue, 22 Sep 2015, Lee Jones wrote: > On Sun, 14 Jun 2015, Vladimir Zapolskiy wrote: > > > Platform PWM backlight data provided by board's device tree should be > > complete enough to successfully request a pwm device using pwm_get() > > API. This change fixes a bug, when an arbitrary (first found) PWM is > > connected to a "pwm-backlight" compatible device, when explicit PWM > > device reference is not given. > > > > Documentation/devicetree/bindings/video/backlight/pwm-backlight.txt > > already describes "pwms" as a required property, instead of blind > > selection of a potentially wrong PWM reject legacy PWM device > > registration request, leave legacy API only for non-dt cases. > > > > Based on initial implementation done by Dmitry Eremin-Solenikov. > > > > Reported-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> > > Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com> > > Acked-by: Thierry Reding <thierry.reding@gmail.com> > > --- > > drivers/video/backlight/pwm_bl.c | 13 +++++++------ > > 1 file changed, 7 insertions(+), 6 deletions(-) > > Applied, thanks. Slight change of plan, as the patch does not apply. Please rebase it on top of the backlight tree and resubmit with my Ack. > > diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c > > index 57cb9ec..9991cdb 100644 > > --- a/drivers/video/backlight/pwm_bl.c > > +++ b/drivers/video/backlight/pwm_bl.c > > @@ -271,15 +271,16 @@ static int pwm_backlight_probe(struct platform_device *pdev) > > } > > > > pb->pwm = devm_pwm_get(&pdev->dev, NULL); > > - if (IS_ERR(pb->pwm)) { > > + if (IS_ERR(pb->pwm) && !pdev->dev.of_node) { > > dev_err(&pdev->dev, "unable to request PWM, trying legacy API\n"); > > pb->legacy = true; > > pb->pwm = pwm_request(data->pwm_id, "pwm-backlight"); > > - if (IS_ERR(pb->pwm)) { > > - dev_err(&pdev->dev, "unable to request legacy PWM\n"); > > - ret = PTR_ERR(pb->pwm); > > - goto err_alloc; > > - } > > + } > > + > > + if (IS_ERR(pb->pwm)) { > > + dev_err(&pdev->dev, "unable to request PWM\n"); > > + ret = PTR_ERR(pb->pwm); > > + goto err_alloc; > > } > > > > dev_dbg(&pdev->dev, "got pwm for backlight\n"); >
diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c index 57cb9ec..9991cdb 100644 --- a/drivers/video/backlight/pwm_bl.c +++ b/drivers/video/backlight/pwm_bl.c @@ -271,15 +271,16 @@ static int pwm_backlight_probe(struct platform_device *pdev) } pb->pwm = devm_pwm_get(&pdev->dev, NULL); - if (IS_ERR(pb->pwm)) { + if (IS_ERR(pb->pwm) && !pdev->dev.of_node) { dev_err(&pdev->dev, "unable to request PWM, trying legacy API\n"); pb->legacy = true; pb->pwm = pwm_request(data->pwm_id, "pwm-backlight"); - if (IS_ERR(pb->pwm)) { - dev_err(&pdev->dev, "unable to request legacy PWM\n"); - ret = PTR_ERR(pb->pwm); - goto err_alloc; - } + } + + if (IS_ERR(pb->pwm)) { + dev_err(&pdev->dev, "unable to request PWM\n"); + ret = PTR_ERR(pb->pwm); + goto err_alloc; } dev_dbg(&pdev->dev, "got pwm for backlight\n");