| Message ID | 20201022155858.20867-4-nsaenzjulienne@suse.de (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
| Series | Raspberry Pi PoE HAT fan support | expand |
On Thu, Oct 22, 2020 at 5:59 PM Nicolas Saenz Julienne <nsaenzjulienne@suse.de> wrote: > > Upon unbinding the device make sure we release RPi's firmware interface. > > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> > --- > drivers/gpio/gpio-raspberrypi-exp.c | 14 +++++++++++++- > 1 file changed, 13 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpio/gpio-raspberrypi-exp.c b/drivers/gpio/gpio-raspberrypi-exp.c > index bb100e0124e6..c008336e1131 100644 > --- a/drivers/gpio/gpio-raspberrypi-exp.c > +++ b/drivers/gpio/gpio-raspberrypi-exp.c > @@ -231,8 +231,19 @@ static int rpi_exp_gpio_probe(struct platform_device *pdev) > rpi_gpio->gc.get = rpi_exp_gpio_get; > rpi_gpio->gc.set = rpi_exp_gpio_set; > rpi_gpio->gc.can_sleep = true; > + platform_set_drvdata(pdev, rpi_gpio); > > - return devm_gpiochip_add_data(dev, &rpi_gpio->gc, rpi_gpio); > + return gpiochip_add_data(&rpi_gpio->gc, rpi_gpio); > +} > + > +static int rpi_exp_gpio_remove(struct platform_device *pdev) > +{ > + struct rpi_exp_gpio *rpi_gpio = platform_get_drvdata(pdev); > + > + gpiochip_remove(&rpi_gpio->gc); > + rpi_firmware_put(rpi_gpio->fw); > + > + return 0; > } > > static const struct of_device_id rpi_exp_gpio_ids[] = { > @@ -247,6 +258,7 @@ static struct platform_driver rpi_exp_gpio_driver = { > .of_match_table = of_match_ptr(rpi_exp_gpio_ids), > }, > .probe = rpi_exp_gpio_probe, > + .remove = rpi_exp_gpio_remove, > }; > module_platform_driver(rpi_exp_gpio_driver); > > -- > 2.28.0 > Why not introduce devm_rpi_firmware_get()? That would allow you to keep the driver elegant without re-adding remove(). Bartosz
On Mon, 2020-10-26 at 15:40 +0100, Bartosz Golaszewski wrote: > On Thu, Oct 22, 2020 at 5:59 PM Nicolas Saenz Julienne > <nsaenzjulienne@suse.de> wrote: > > Upon unbinding the device make sure we release RPi's firmware interface. > > > > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> > > --- > > drivers/gpio/gpio-raspberrypi-exp.c | 14 +++++++++++++- > > 1 file changed, 13 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/gpio/gpio-raspberrypi-exp.c b/drivers/gpio/gpio-raspberrypi-exp.c > > index bb100e0124e6..c008336e1131 100644 > > --- a/drivers/gpio/gpio-raspberrypi-exp.c > > +++ b/drivers/gpio/gpio-raspberrypi-exp.c > > @@ -231,8 +231,19 @@ static int rpi_exp_gpio_probe(struct platform_device *pdev) > > rpi_gpio->gc.get = rpi_exp_gpio_get; > > rpi_gpio->gc.set = rpi_exp_gpio_set; > > rpi_gpio->gc.can_sleep = true; > > + platform_set_drvdata(pdev, rpi_gpio); > > > > - return devm_gpiochip_add_data(dev, &rpi_gpio->gc, rpi_gpio); > > + return gpiochip_add_data(&rpi_gpio->gc, rpi_gpio); > > +} > > + > > +static int rpi_exp_gpio_remove(struct platform_device *pdev) > > +{ > > + struct rpi_exp_gpio *rpi_gpio = platform_get_drvdata(pdev); > > + > > + gpiochip_remove(&rpi_gpio->gc); > > + rpi_firmware_put(rpi_gpio->fw); > > + > > + return 0; > > } > > > > static const struct of_device_id rpi_exp_gpio_ids[] = { > > @@ -247,6 +258,7 @@ static struct platform_driver rpi_exp_gpio_driver = { > > .of_match_table = of_match_ptr(rpi_exp_gpio_ids), > > }, > > .probe = rpi_exp_gpio_probe, > > + .remove = rpi_exp_gpio_remove, > > }; > > module_platform_driver(rpi_exp_gpio_driver); > > > > -- > > 2.28.0 > > > > Why not introduce devm_rpi_firmware_get()? That would allow you to > keep the driver elegant without re-adding remove(). I like the idea, I'll look into it. Thanks, Nicolas
On Mon, Oct 26, 2020 at 3:42 PM Nicolas Saenz Julienne <nsaenzjulienne@suse.de> wrote: > > On Mon, 2020-10-26 at 15:40 +0100, Bartosz Golaszewski wrote: > > On Thu, Oct 22, 2020 at 5:59 PM Nicolas Saenz Julienne > > <nsaenzjulienne@suse.de> wrote: > > > Upon unbinding the device make sure we release RPi's firmware interface. > > > > > > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> > > > --- > > > drivers/gpio/gpio-raspberrypi-exp.c | 14 +++++++++++++- > > > 1 file changed, 13 insertions(+), 1 deletion(-) > > > > > > diff --git a/drivers/gpio/gpio-raspberrypi-exp.c b/drivers/gpio/gpio-raspberrypi-exp.c > > > index bb100e0124e6..c008336e1131 100644 > > > --- a/drivers/gpio/gpio-raspberrypi-exp.c > > > +++ b/drivers/gpio/gpio-raspberrypi-exp.c > > > @@ -231,8 +231,19 @@ static int rpi_exp_gpio_probe(struct platform_device *pdev) > > > rpi_gpio->gc.get = rpi_exp_gpio_get; > > > rpi_gpio->gc.set = rpi_exp_gpio_set; > > > rpi_gpio->gc.can_sleep = true; > > > + platform_set_drvdata(pdev, rpi_gpio); > > > > > > - return devm_gpiochip_add_data(dev, &rpi_gpio->gc, rpi_gpio); > > > + return gpiochip_add_data(&rpi_gpio->gc, rpi_gpio); > > > +} > > > + > > > +static int rpi_exp_gpio_remove(struct platform_device *pdev) > > > +{ > > > + struct rpi_exp_gpio *rpi_gpio = platform_get_drvdata(pdev); > > > + > > > + gpiochip_remove(&rpi_gpio->gc); > > > + rpi_firmware_put(rpi_gpio->fw); > > > + > > > + return 0; > > > } > > > > > > static const struct of_device_id rpi_exp_gpio_ids[] = { > > > @@ -247,6 +258,7 @@ static struct platform_driver rpi_exp_gpio_driver = { > > > .of_match_table = of_match_ptr(rpi_exp_gpio_ids), > > > }, > > > .probe = rpi_exp_gpio_probe, > > > + .remove = rpi_exp_gpio_remove, > > > }; > > > module_platform_driver(rpi_exp_gpio_driver); > > > > > > -- > > > 2.28.0 > > > > > > > Why not introduce devm_rpi_firmware_get()? That would allow you to > > keep the driver elegant without re-adding remove(). > > I like the idea, I'll look into it. > > Thanks, > Nicolas > If you can't do it for some reason, then even using devm_add_action() is fine. Bartosz
diff --git a/drivers/gpio/gpio-raspberrypi-exp.c b/drivers/gpio/gpio-raspberrypi-exp.c index bb100e0124e6..c008336e1131 100644 --- a/drivers/gpio/gpio-raspberrypi-exp.c +++ b/drivers/gpio/gpio-raspberrypi-exp.c @@ -231,8 +231,19 @@ static int rpi_exp_gpio_probe(struct platform_device *pdev) rpi_gpio->gc.get = rpi_exp_gpio_get; rpi_gpio->gc.set = rpi_exp_gpio_set; rpi_gpio->gc.can_sleep = true; + platform_set_drvdata(pdev, rpi_gpio); - return devm_gpiochip_add_data(dev, &rpi_gpio->gc, rpi_gpio); + return gpiochip_add_data(&rpi_gpio->gc, rpi_gpio); +} + +static int rpi_exp_gpio_remove(struct platform_device *pdev) +{ + struct rpi_exp_gpio *rpi_gpio = platform_get_drvdata(pdev); + + gpiochip_remove(&rpi_gpio->gc); + rpi_firmware_put(rpi_gpio->fw); + + return 0; } static const struct of_device_id rpi_exp_gpio_ids[] = { @@ -247,6 +258,7 @@ static struct platform_driver rpi_exp_gpio_driver = { .of_match_table = of_match_ptr(rpi_exp_gpio_ids), }, .probe = rpi_exp_gpio_probe, + .remove = rpi_exp_gpio_remove, }; module_platform_driver(rpi_exp_gpio_driver);
Upon unbinding the device make sure we release RPi's firmware interface. Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de> --- drivers/gpio/gpio-raspberrypi-exp.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)