From: Matthew Garrett Date: Fri, 1 Jun 2007 07:46:51 +0000 (-0700) Subject: RTC: use fallback IRQ if PNP tables don't provide one X-Git-Tag: v2.6.22-rc4~38 X-Git-Url: http://pilppa.org/gitweb/?a=commitdiff_plain;h=6cd8fa87fbf31b2ab77b8aaec497e7f6a3757578;p=linux-2.6-omap-h63xx.git RTC: use fallback IRQ if PNP tables don't provide one 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 Cc: Matthieu CASTET Signed-off-by: David Brownell Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c index 6085261aa2c..e24ea82dc35 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)