[PATCH] usb: dwc3: of-simple: Convert to bulk clk API

[Robin Murphy]

Now that the bulk API has a "get all of the clocks" helper to match
what this code wants, there's little reason not to switch over.

Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx>
---
 drivers/usb/dwc3/dwc3-of-simple.c | 95 ++++++-------------------------
 1 file changed, 17 insertions(+), 78 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
index 4c2771c5e727..c4da82dd15c7 100644
--- a/drivers/usb/dwc3/dwc3-of-simple.c
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -24,59 +24,13 @@
 
 struct dwc3_of_simple {
 	struct device		*dev;
-	struct clk		**clks;
+	struct clk_bulk_data	*clks;
 	int			num_clocks;
 	struct reset_control	*resets;
 	bool			pulse_resets;
 	bool			need_reset;
 };
 
-static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count)
-{
-	struct device		*dev = simple->dev;
-	struct device_node	*np = dev->of_node;
-	int			i;
-
-	simple->num_clocks = count;
-
-	if (!count)
-		return 0;
-
-	simple->clks = devm_kcalloc(dev, simple->num_clocks,
-			sizeof(struct clk *), GFP_KERNEL);
-	if (!simple->clks)
-		return -ENOMEM;
-
-	for (i = 0; i < simple->num_clocks; i++) {
-		struct clk	*clk;
-		int		ret;
-
-		clk = of_clk_get(np, i);
-		if (IS_ERR(clk)) {
-			while (--i >= 0) {
-				clk_disable_unprepare(simple->clks[i]);
-				clk_put(simple->clks[i]);
-			}
-			return PTR_ERR(clk);
-		}
-
-		ret = clk_prepare_enable(clk);
-		if (ret < 0) {
-			while (--i >= 0) {
-				clk_disable_unprepare(simple->clks[i]);
-				clk_put(simple->clks[i]);
-			}
-			clk_put(clk);
-
-			return ret;
-		}
-
-		simple->clks[i] = clk;
-	}
-
-	return 0;
-}
-
 static int dwc3_of_simple_probe(struct platform_device *pdev)
 {
 	struct dwc3_of_simple	*simple;
@@ -84,7 +38,6 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
 	struct device_node	*np = dev->of_node;
 
 	int			ret;
-	int			i;
 	bool			shared_resets = false;
 
 	simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL);
@@ -124,20 +77,18 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
 			goto err_resetc_put;
 	}
 
-	ret = dwc3_of_simple_clk_init(simple, of_count_phandle_with_args(np,
-						"clocks", "#clock-cells"));
+	ret = clk_bulk_get_all(simple->dev, &simple->clks);
+	if (ret < 0)
+		goto err_resetc_assert;
+
+	simple->num_clocks = ret;
+	ret = clk_bulk_prepare_enable(simple->num_clocks, simple->clks);
 	if (ret)
 		goto err_resetc_assert;
 
 	ret = of_platform_populate(np, NULL, NULL, dev);
-	if (ret) {
-		for (i = 0; i < simple->num_clocks; i++) {
-			clk_disable_unprepare(simple->clks[i]);
-			clk_put(simple->clks[i]);
-		}
-
-		goto err_resetc_assert;
-	}
+	if (ret)
+		goto err_clk_put;
 
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
@@ -145,6 +96,10 @@ static int dwc3_of_simple_probe(struct platform_device *pdev)
 
 	return 0;
 
+err_clk_put:
+	clk_bulk_disable_unprepare(simple->num_clocks, simple->clks);
+	clk_bulk_put_all(simple->num_clocks, simple->clks);
+
 err_resetc_assert:
 	if (!simple->pulse_resets)
 		reset_control_assert(simple->resets);
@@ -158,14 +113,11 @@ static int dwc3_of_simple_remove(struct platform_device *pdev)
 {
 	struct dwc3_of_simple	*simple = platform_get_drvdata(pdev);
 	struct device		*dev = &pdev->dev;
-	int			i;
 
 	of_platform_depopulate(dev);
 
-	for (i = 0; i < simple->num_clocks; i++) {
-		clk_disable_unprepare(simple->clks[i]);
-		clk_put(simple->clks[i]);
-	}
+	clk_bulk_disable_unprepare(simple->num_clocks, simple->clks);
+	clk_bulk_put_all(simple->num_clocks, simple->clks);
 	simple->num_clocks = 0;
 
 	if (!simple->pulse_resets)
@@ -183,10 +135,8 @@ static int dwc3_of_simple_remove(struct platform_device *pdev)
 static int __maybe_unused dwc3_of_simple_runtime_suspend(struct device *dev)
 {
 	struct dwc3_of_simple	*simple = dev_get_drvdata(dev);
-	int			i;
 
-	for (i = 0; i < simple->num_clocks; i++)
-		clk_disable(simple->clks[i]);
+	clk_bulk_disable(simple->num_clocks, simple->clks);
 
 	return 0;
 }
@@ -194,19 +144,8 @@ static int __maybe_unused dwc3_of_simple_runtime_suspend(struct device *dev)
 static int __maybe_unused dwc3_of_simple_runtime_resume(struct device *dev)
 {
 	struct dwc3_of_simple	*simple = dev_get_drvdata(dev);
-	int			ret;
-	int			i;
 
-	for (i = 0; i < simple->num_clocks; i++) {
-		ret = clk_enable(simple->clks[i]);
-		if (ret < 0) {
-			while (--i >= 0)
-				clk_disable(simple->clks[i]);
-			return ret;
-		}
-	}
-
-	return 0;
+	return clk_bulk_enable(simple->num_clocks, simple->clks);
 }
 
 static int __maybe_unused dwc3_of_simple_suspend(struct device *dev)
-- 
2.21.0.dirty