rtc: rtc-s3c: Updates RTC driver for clock enabling support
This Patch updates existing Samsung RTC driver for clock enabling support.
Signed-off-by: Atul Dahiya <atul.dahiya@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Acked-by: Wan ZongShun <mcuos.com@gmail.com>
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 70b68d3..c032a15 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -1,5 +1,8 @@
/* drivers/rtc/rtc-s3c.c
*
+ * Copyright (c) 2010 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com/
+ *
* Copyright (c) 2004,2006 Simtec Electronics
* Ben Dooks, <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
@@ -39,6 +42,7 @@
static struct resource *s3c_rtc_mem;
+static struct clk *rtc_clk;
static void __iomem *s3c_rtc_base;
static int s3c_rtc_alarmno = NO_IRQ;
static int s3c_rtc_tickno = NO_IRQ;
@@ -431,6 +435,10 @@
s3c_rtc_setpie(&dev->dev, 0);
s3c_rtc_setaie(0);
+ clk_disable(rtc_clk);
+ clk_put(rtc_clk);
+ rtc_clk = NULL;
+
iounmap(s3c_rtc_base);
release_resource(s3c_rtc_mem);
kfree(s3c_rtc_mem);
@@ -488,6 +496,16 @@
goto err_nomap;
}
+ rtc_clk = clk_get(&pdev->dev, "rtc");
+ if (IS_ERR(rtc_clk)) {
+ dev_err(&pdev->dev, "failed to find rtc clock source\n");
+ ret = PTR_ERR(rtc_clk);
+ rtc_clk = NULL;
+ goto err_clk;
+ }
+
+ clk_enable(rtc_clk);
+
/* check to see if everything is setup correctly */
s3c_rtc_enable(pdev, 1);
@@ -523,6 +541,10 @@
err_nortc:
s3c_rtc_enable(pdev, 0);
+ clk_disable(rtc_clk);
+ clk_put(rtc_clk);
+
+ err_clk:
iounmap(s3c_rtc_base);
err_nomap: