[PATCHv4 10/26] clk: fix assigned-clocks to pass with deferring provider

[Tero Kristo]

From: Tero Kristo <t-kristo at ti.com>

If a clock provider is not ready for assigning default rates/parents
during its probe, it may return -EPROBE_DEFER directly from xlate.
Handle this special case properly by skipping the entry and adjusting the
return value to pass. The defaults will be handled properly in post probe
phase then.

Signed-off-by: Tero Kristo <t-kristo at ti.com>
Signed-off-by: Tero Kristo <kristo at kernel.org>
---
 drivers/clk/clk-uclass.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index ac2b7ae84e..5ebf7a33cb 100644
--- a/drivers/clk/clk-uclass.c
+++ b/drivers/clk/clk-uclass.c
@@ -240,6 +240,15 @@ static int clk_set_default_parents(struct udevice *dev, int stage)
 
 		ret = clk_get_by_indexed_prop(dev, "assigned-clocks",
 					      index, &clk);
+		/*
+		 * If the clock provider is not ready yet, let it handle
+		 * the re-programming later.
+		 */
+		if (ret == -EPROBE_DEFER) {
+			ret = 0;
+			continue;
+		}
+
 		if (ret) {
 			debug("%s: could not get assigned clock %d for %s\n",
 			      __func__, index, dev_read_name(dev));
@@ -308,6 +317,15 @@ static int clk_set_default_rates(struct udevice *dev, int stage)
 
 		ret = clk_get_by_indexed_prop(dev, "assigned-clocks",
 					      index, &clk);
+		/*
+		 * If the clock provider is not ready yet, let it handle
+		 * the re-programming later.
+		 */
+		if (ret == -EPROBE_DEFER) {
+			ret = 0;
+			continue;
+		}
+
 		if (ret) {
 			debug("%s: could not get assigned clock %d for %s\n",
 			      __func__, index, dev_read_name(dev));
-- 
2.17.1