Re: [PATCH v3 10/15] leds: leds-gpio: Add ACPI probing support

Dmitry Torokhov
2014-10-01T16:30:31Z

On Wed, Oct 01, 2014 at 10:13:04AM +0200, Arnd Bergmann wrote:
> On Wednesday 01 October 2014 04:17:02 Rafael J. Wysocki wrote:
> > Index: linux-pm/drivers/leds/leds-gpio.c
> > ===================================================================
> > --- linux-pm.orig/drivers/leds/leds-gpio.c
> > +++ linux-pm/drivers/leds/leds-gpio.c
> > @@ -231,6 +231,13 @@ static const struct of_device_id of_gpio
> >
> > MODULE_DEVICE_TABLE(of, of_gpio_leds_match);
> >
> > +static const struct acpi_device_id acpi_gpio_leds_match[] = {
> > + { "PRP0001" }, /* Device Tree shoehorned into ACPI */
> > + {},
> > +};
> > +
> > +MODULE_DEVICE_TABLE(acpi, acpi_gpio_leds_match);
> > +
> > static int gpio_led_probe(struct platform_device *pdev)
> > {
> > struct gpio_led_platform_data *pdata = dev_get_platdata(&pdev->dev);
> > @@ -286,6 +293,7 @@ static struct platform_driver gpio_led_d
> > .name = "leds-gpio",
> > .owner = THIS_MODULE,
> > .of_match_table = of_gpio_leds_match,
> > + .acpi_match_table = acpi_gpio_leds_match,
> > },
> > };
>
> Is this something you'd have to do in every driver you want to support
> _PRP based probing? For the ".acpi_match_table =" reference, I think
> you could actually provide a generic acpi_device_id table exported from
> core code that you refer to, so each driver just does
>
> .acpi_match_table = acpi_match_by_of_compatible,

No, I think in absence of drv->acpi_match_table ACPI core should just go and
use drv->of_match_table to do the matching and be done with it.

Thanks.

--
Dmitry