On Monday 28 May 2007, Matthew Garrett wrote:
> From: Matthew Garrett <[email protected]>
>
> Intel Macs (and possibly other machines) provide a PNP entry for the
> RTC, but provide no IRQ. As a result the rtc-cmos driver doesn't allow
> wakeup alarms. If the RTC is located at the legacy ioport range, assume
> that it's on IRQ 8 unless the tables say otherwise.
>
> Signed-off-by: Matthew Garrett <[email protected]>
Signed-off-by: David Brownell <[email protected]>
>
> ---
>
> diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
> index 6085261..e24ea82 100644
> --- a/drivers/rtc/rtc-cmos.c
> +++ b/drivers/rtc/rtc-cmos.c
> @@ -641,9 +641,16 @@ cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
> * drivers can't provide shutdown() methods to disable IRQs.
> * Or better yet, fix PNP to allow those methods...
> */
> - return cmos_do_probe(&pnp->dev,
> - &pnp->res.port_resource[0],
> - pnp->res.irq_resource[0].start);
> + if (pnp_port_start(pnp,0) == 0x70 && !pnp_irq_valid(pnp,0))
> + /* Some machines contain a PNP entry for the RTC, but
> + * don't define the IRQ. It should always be safe to
> + * hardcode it in these cases
> + */
> + return cmos_do_probe(&pnp->dev, &pnp->res.port_resource[0], 8);
> + else
> + return cmos_do_probe(&pnp->dev,
> + &pnp->res.port_resource[0],
> + pnp->res.irq_resource[0].start);
> }
>
> static void __exit cmos_pnp_remove(struct pnp_dev *pnp)
>
> --
> Matthew Garrett | [email protected]
>
-
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