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authorKeerthy <j-keerthy@ti.com>2015-08-18 15:11:15 +0530
committerAlexandre Belloni <alexandre.belloni@free-electrons.com>2015-09-05 19:37:20 +0200
commit532409aa1ba8b69d5a3dea159d4b1bd9adbd7a46 (patch)
tree490e74374ac5471ef1a93c265d4b9f7dd0d8e9b9 /drivers/rtc
parentfff51e771eafc3b4fa6daf1372fd4a4023bb402b (diff)
rtc: omap: Add internal clock enabling support
The rtc can be clocked by an internal 32K clock. Adding the support to enable the same. Signed-off-by: Keerthy <j-keerthy@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-omap.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 8b6355ffaff9..f31c0127dae0 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -25,6 +25,7 @@
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/io.h>
+#include <linux/clk.h>
/*
* The OMAP RTC is a year/month/day/hours/minutes/seconds BCD clock
@@ -132,6 +133,7 @@ struct omap_rtc_device_type {
struct omap_rtc {
struct rtc_device *rtc;
void __iomem *base;
+ struct clk *clk;
int irq_alarm;
int irq_timer;
u8 interrupts_reg;
@@ -553,6 +555,11 @@ static int omap_rtc_probe(struct platform_device *pdev)
if (rtc->irq_alarm <= 0)
return -ENOENT;
+ rtc->clk = devm_clk_get(&pdev->dev, "int-clk");
+
+ if (!IS_ERR(rtc->clk))
+ clk_prepare_enable(rtc->clk);
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
rtc->base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(rtc->base))
@@ -681,6 +688,9 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, 0);
+ if (!IS_ERR(rtc->clk))
+ clk_disable_unprepare(rtc->clk);
+
rtc->type->unlock(rtc);
/* leave rtc running, but disable irqs */
rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0);