clk: sunxi: Use CLK_IS_CRITICAL flag for critical clks

We'd like to privatize __clk_get(), but the sunxi clk driver is
calling this function to keep a reference held on the clk and
call clk_prepare_enable() on it. We support this design in the
clk core now with the CLK_IS_CRITICAL flag, so let's just use
that instead.

Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

drivers/clk/sunxi/clk-factors.c

@@ -176,10 +176,10 @@ static const struct clk_ops clk_factors_ops = {
 	.set_rate = clk_factors_set_rate,
 };
 
-struct clk *sunxi_factors_register(struct device_node *node,
-				   const struct factors_data *data,
-				   spinlock_t *lock,
-				   void __iomem *reg)
+static struct clk *__sunxi_factors_register(struct device_node *node,
+					    const struct factors_data *data,
+					    spinlock_t *lock, void __iomem *reg,
+					    unsigned long flags)
 {
 	struct clk *clk;
 	struct clk_factors *factors;
@@ -249,7 +249,7 @@ struct clk *sunxi_factors_register(struct device_node *node,
 			parents, i,
 			mux_hw, &clk_mux_ops,
 			&factors->hw, &clk_factors_ops,
-			gate_hw, &clk_gate_ops, 0);
+			gate_hw, &clk_gate_ops, CLK_IS_CRITICAL);
 	if (IS_ERR(clk))
 		goto err_register;
 
@@ -272,6 +272,22 @@ err_factors:
 	return NULL;
 }
 
+struct clk *sunxi_factors_register(struct device_node *node,
+				   const struct factors_data *data,
+				   spinlock_t *lock,
+				   void __iomem *reg)
+{
+	return __sunxi_factors_register(node, data, lock, reg, 0);
+}
+
+struct clk *sunxi_factors_register_critical(struct device_node *node,
+					    const struct factors_data *data,
+					    spinlock_t *lock,
+					    void __iomem *reg)
+{
+	return __sunxi_factors_register(node, data, lock, reg, CLK_IS_CRITICAL);
+}
+
 void sunxi_factors_unregister(struct device_node *node, struct clk *clk)
 {
 	struct clk_hw *hw = __clk_get_hw(clk);