[PATCH v2 03/20] rtc: omap: fix interrupt disable at probe

Johan Hovold
2014-10-21T17:37:49Z

Use writel instead of writeb when disabling interrupts at probe as
ALARM2 is not cleared otherwise on some IP-block revisions (e.g.
AM3352).

Note that the driver currently never enables the ALARM2 interrupt.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/rtc/rtc-omap.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 828cb9983cc2..813d475fe7c6 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -427,10 +427,12 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
}
platform_set_drvdata(pdev, rtc);

- /* clear pending irqs, and set 1/second periodic,
- * which we'll use instead of update irqs
+ /*
+ * disable interrupts
+ *
+ * NOTE: ALARM2 is not cleared on AM3352 if rtc_write (writeb) is used
*/
- rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+ rtc_writel(0, OMAP_RTC_INTERRUPTS_REG);

/* enable RTC functional clock */
if (id_entry->driver_data & OMAP_RTC_HAS_32KCLK_EN) {
--
2.0.4