[PATCH v3 03/12] clk: Unconditionally recursively en-/dis-able clocks

[Sean Anderson <seanga2@gmail.com>]

For clocks not in the CCF, their parents will not have UCLASS_CLK, so we just
enable them as normal. The enable count is local to the struct clk, but this
will never result in the actual en-/dis-able op being called (unless the same
struct clk is enabled twice).

For clocks in the CCF, we always traverse up the tree when enabling. Previously,
CCF clocks without id set would be skipped, stopping the traversal too early.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
---
  Changes for v3:
  - New.

 drivers/clk/clk-uclass.c | 58 +++++++++++++++++-----------------------
 1 file changed, 25 insertions(+), 33 deletions(-)

diff --git a/drivers/clk/clk-uclass.c b/drivers/clk/clk-uclass.c
index 9aa8537004..87d101aab4 100644
--- a/drivers/clk/clk-uclass.c
+++ b/drivers/clk/clk-uclass.c
@@ -490,7 +490,6 @@ int clk_set_parent(struct clk *clk, struct clk *parent)
 int clk_enable(struct clk *clk)
 {
 	const struct clk_ops *ops;
-	struct clk *clkp = NULL;
 	int ret;
 
 	debug("%s(clk=%p)\n", __func__, clk);
@@ -499,32 +498,28 @@ int clk_enable(struct clk *clk)
 	ops = clk_dev_ops(clk->dev);
 
 	if (CONFIG_IS_ENABLED(CLK_CCF)) {
-		/* Take id 0 as a non-valid clk, such as dummy */
-		if (clk->id && !clk_get_by_id(clk->id, &clkp)) {
-			if (clkp->enable_count) {
-				clkp->enable_count++;
-				return 0;
-			}
-			if (clkp->dev->parent &&
-			    device_get_uclass_id(clkp->dev) == UCLASS_CLK) {
-				ret = clk_enable(dev_get_clk_ptr(clkp->dev->parent));
-				if (ret) {
-					printf("Enable %s failed\n",
-					       clkp->dev->parent->name);
-					return ret;
-				}
+		if (clk->enable_count) {
+			clk->enable_count++;
+			return 0;
+		}
+		if (clk->dev->parent &&
+		    device_get_uclass_id(clk->dev->parent) == UCLASS_CLK) {
+			ret = clk_enable(dev_get_clk_ptr(clk->dev->parent));
+			if (ret) {
+				printf("Enable %s failed\n",
+				       clk->dev->parent->name);
+				return ret;
 			}
 		}
 
 		if (ops->enable) {
 			ret = ops->enable(clk);
 			if (ret) {
-				printf("Enable %s failed\n", clk->dev->name);
+				printf("Enable %s failed (error %d)\n", clk->dev->name, ret);
 				return ret;
 			}
 		}
-		if (clkp)
-			clkp->enable_count++;
+		clk->enable_count++;
 	} else {
 		if (!ops->enable)
 			return -ENOSYS;
@@ -550,7 +545,6 @@ int clk_enable_bulk(struct clk_bulk *bulk)
 int clk_disable(struct clk *clk)
 {
 	const struct clk_ops *ops;
-	struct clk *clkp = NULL;
 	int ret;
 
 	debug("%s(clk=%p)\n", __func__, clk);
@@ -559,29 +553,27 @@ int clk_disable(struct clk *clk)
 	ops = clk_dev_ops(clk->dev);
 
 	if (CONFIG_IS_ENABLED(CLK_CCF)) {
-		if (clk->id && !clk_get_by_id(clk->id, &clkp)) {
-			if (clkp->enable_count == 0) {
-				printf("clk %s already disabled\n",
-				       clkp->dev->name);
-				return 0;
-			}
-
-			if (--clkp->enable_count > 0)
-				return 0;
+		if (clk->enable_count == 0) {
+			printf("clk %s already disabled\n",
+			       clk->dev->name);
+			return 0;
 		}
 
+		if (--clk->enable_count > 0)
+			return 0;
+
 		if (ops->disable) {
 			ret = ops->disable(clk);
 			if (ret)
 				return ret;
 		}
 
-		if (clkp && clkp->dev->parent &&
-		    device_get_uclass_id(clkp->dev) == UCLASS_CLK) {
-			ret = clk_disable(dev_get_clk_ptr(clkp->dev->parent));
+		if (clk->dev->parent &&
+		    device_get_uclass_id(clk->dev) == UCLASS_CLK) {
+			ret = clk_disable(dev_get_clk_ptr(clk->dev->parent));
 			if (ret) {
-				printf("Disable %s failed\n",
-				       clkp->dev->parent->name);
+				printf("Disable %s failed (error %d)\n",
+				       clk->dev->parent->name, ret);
 				return ret;
 			}
 		}
-- 
2.25.0