clk: imx: Add imx_obtain_fixed_clock clk_hw based variant

In order to move to clk_hw based API, imx_obtain_fixed_clock_hw
is added. The end goal here is to have all the clk providers use
the clk_hw based API.

Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/clk/imx/clk.c

@@ -74,6 +74,17 @@ struct clk * __init imx_obtain_fixed_clock(
 	return clk;
 }
 
+struct clk_hw * __init imx_obtain_fixed_clock_hw(
+			const char *name, unsigned long rate)
+{
+	struct clk *clk;
+
+	clk = imx_obtain_fixed_clock_from_dt(name);
+	if (IS_ERR(clk))
+		clk = imx_clk_fixed(name, rate);
+	return __clk_get_hw(clk);
+}
+
 struct clk_hw * __init imx_obtain_fixed_clk_hw(struct device_node *np,
 					       const char *name)
 {

drivers/clk/imx/clk.h

@@ -96,6 +96,9 @@ struct clk *clk_register_gate2(struct device *dev, const char *name,
 struct clk * imx_obtain_fixed_clock(
 			const char *name, unsigned long rate);
 
+struct clk_hw *imx_obtain_fixed_clock_hw(
+			const char *name, unsigned long rate);
+
 struct clk_hw *imx_obtain_fixed_clk_hw(struct device_node *np,
 				       const char *name);