[PATCH 02/12] clocksource: sh_mtu2: Add clk_prepare/unprepare support

[Laurent Pinchart]

Prepare the clock at probe time, as there is no other appropriate place
in the driver where we're allowed to sleep.

Cc: Daniel Lezcano <daniel.lezcano at linaro.org>
Cc: linux-kernel at vger.kernel.org
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
---
 drivers/clocksource/sh_mtu2.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/clocksource/sh_mtu2.c b/drivers/clocksource/sh_mtu2.c
index 4aac9ee..3cf1283 100644
--- a/drivers/clocksource/sh_mtu2.c
+++ b/drivers/clocksource/sh_mtu2.c
@@ -313,8 +313,20 @@ static int sh_mtu2_setup(struct sh_mtu2_priv *p, struct platform_device *pdev)
 		goto err1;
 	}
 
-	return sh_mtu2_register(p, (char *)dev_name(&p->pdev->dev),
-				cfg->clockevent_rating);
+	ret = clk_prepare(p->clk);
+	if (ret < 0)
+		goto err2;
+
+	ret = sh_mtu2_register(p, (char *)dev_name(&p->pdev->dev),
+			       cfg->clockevent_rating);
+	if (ret < 0)
+		goto err3;
+
+	return 0;
+ err3:
+	clk_unprepare(p->clk);
+ err2:
+	clk_put(p->clk);
  err1:
 	iounmap(p->mapbase);
  err0:
-- 
1.8.1.5