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@xxxxxxx> wrote:
> > Upon unbinding the device make sure we release RPi's firmware interface.
> >
> > Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@xxxxxxx>
> > ---
> > 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
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