clk: initially enable critical clocks

Critical clocks have to be enabled initially. We have to do this not
only to enable the clock itself, but also to make sure its parents
stay enabled and also to correctly enable the new parents during
reparenting of the clock.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index ea3304bc7c..05bc21a6d4 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -282,6 +282,9 @@ int clk_register(struct clk *clk)
 
 	list_add_tail(&clk->list, &clks);
 
+	if (clk->flags & CLK_IS_CRITICAL)
+		clk_enable(clk);
+
 	return 0;
 }