clocksource: sh_mtu2: Add clk_prepare/unprepare support
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@linaro.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/drivers/clocksource/sh_mtu2.c b/drivers/clocksource/sh_mtu2.c
index e6cfb32..3cf1283 100644
--- a/drivers/clocksource/sh_mtu2.c
+++ b/drivers/clocksource/sh_mtu2.c
@@ -313,13 +313,18 @@
goto err1;
}
- ret = sh_mtu2_register(p, (char *)dev_name(&p->pdev->dev),
- cfg->clockevent_rating);
+ ret = clk_prepare(p->clk);
if (ret < 0)
goto err2;
- return 0;
+ 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: