clk: mvebu: armada-xp: maintain clock init order

Init order of CLK_OF_DECLARE'd drivers depends on compile order.
Unfortunately, clk_of_init does not allow drivers to return errors,
e.g. -EPROBE_DEFER if parent clocks have not been registered, yet.

To avoid init order woes for MVEBU clock drivers, we take care of
proper init order ourselves. This patch joins core-clk and gating-clk
init to maintain proper init order.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

diff --git a/drivers/clk/mvebu/armada-xp.c b/drivers/clk/mvebu/armada-xp.c
index 9922c4475aa8b3f7d01c2881c8a757b94f9027af..b3094315a3c0faa89926dcf7442d5034f39b4f15 100644 (file)
--- a/drivers/clk/mvebu/armada-xp.c
+++ b/drivers/clk/mvebu/armada-xp.c
@@ -158,13 +158,6 @@ static const struct coreclk_soc_desc axp_coreclks = {
        .num_ratios = ARRAY_SIZE(axp_coreclk_ratios),
 };
 
-static void __init axp_coreclk_init(struct device_node *np)
-{
-       mvebu_coreclk_setup(np, &axp_coreclks);
-}
-CLK_OF_DECLARE(axp_core_clk, "marvell,armada-xp-core-clock",
-              axp_coreclk_init);
-
 /*
  * Clock Gating Control
  */
@@ -202,9 +195,14 @@ static const struct clk_gating_soc_desc axp_gating_desc[] __initconst = {
        { }
 };
 
-static void __init axp_clk_gating_init(struct device_node *np)
+static void __init axp_clk_init(struct device_node *np)
 {
-       mvebu_clk_gating_setup(np, axp_gating_desc);
+       struct device_node *cgnp =
+               of_find_compatible_node(NULL, NULL, "marvell,armada-xp-gating-clock");
+
+       mvebu_coreclk_setup(np, &axp_coreclks);
+
+       if (cgnp)
+               mvebu_clk_gating_setup(cgnp, axp_gating_desc);
 }
-CLK_OF_DECLARE(axp_clk_gating, "marvell,armada-xp-gating-clock",
-              axp_clk_gating_init);
+CLK_OF_DECLARE(axp_clk, "marvell,armada-xp-core-clock", axp_clk_init);