From 1ed8b5d26c33d5c95845be7d51aae2bf6f1b053c Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Wed, 10 Dec 2014 15:52:36 -0800
Subject: [PATCH] rtc: omap: fix interrupt disable at probe

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>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Benot Cousson <bcousson@baylibre.com>
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Tero Kristo <t-kristo@ti.com>
Cc: Keerthy J <j-keerthy@ti.com>
Tested-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.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) {
-- 
2.20.1