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authorJohan Hovold <jhovold@gmail.com>2013-06-13 01:04:52 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-06-13 03:29:45 +0400
commit558c61e5579a81551c0d6c2deaed1da3c7bf714a (patch)
tree87c85a886f9e9dda5864f45356a3ecdbb3838373 /drivers/rtc/rtc-at91rm9200.c
parente099127169429c19544a8f55dd26937fddd5b1f4 (diff)
downloadlinux-558c61e5579a81551c0d6c2deaed1da3c7bf714a.tar.xz
rtc-at91rm9200: add match-table compile guard
The members of Atmel's at91sam9x5 family (9x5) have a broken RTC interrupt mask register (AT91_RTC_IMR). It does not reflect enabled interrupts but instead always returns zero. The kernel's rtc-at91rm9200 driver handles the RTC for the 9x5 family. Currently when the date/time is set, an interrupt is generated and this driver neglects to handle the interrupt. The kernel complains about the un-handled interrupt and disables it henceforth. This not only breaks the RTC function, but since that interrupt is shared (Atmel's SYS interrupt) then other things break as well (e.g. the debug port no longer accepts characters). Tested on the at91sam9g25. Bug confirmed by Atmel. This patch (of 5): Add missing match-table compile guard. Signed-off-by: Johan Hovold <jhovold@gmail.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Douglas Gilbert <dgilbert@interlog.com> Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Ludovic Desroches <ludovic.desroches@atmel.com> Cc: Robert Nelson <Robert.Nelson@digikey.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc/rtc-at91rm9200.c')
-rw-r--r--drivers/rtc/rtc-at91rm9200.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 0eab77b22340..eeeb73f1fc3b 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -383,11 +383,13 @@ static int at91_rtc_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume);
+#ifdef CONFIG_OF
static const struct of_device_id at91_rtc_dt_ids[] = {
{ .compatible = "atmel,at91rm9200-rtc" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
+#endif
static struct platform_driver at91_rtc_driver = {
.remove = __exit_p(at91_rtc_remove),