[PATCH 2/2] usb: dwc2: use clk bulk API for supporting additional clocks

[Sascha Hauer <s.hauer@pengutronix.de>]

This switches to the clk bulk API for the dwc2 driver. With this
additional clocks can be supported.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/usb/dwc2/core.h     |  2 ++
 drivers/usb/dwc2/platform.c | 18 ++++++++----------
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index 7161344c6522..4c9e2c75f3dd 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -1075,6 +1075,8 @@ struct dwc2_hsotg {
 	spinlock_t lock;
 	void *priv;
 	int     irq;
+	struct clk_bulk_data *clocks;
+	int num_clocks;
 	struct clk *clk;
 	struct reset_control *reset;
 	struct reset_control *reset_ecc;
diff --git a/drivers/usb/dwc2/platform.c b/drivers/usb/dwc2/platform.c
index 5f18acac7406..d4a1a26103da 100644
--- a/drivers/usb/dwc2/platform.c
+++ b/drivers/usb/dwc2/platform.c
@@ -143,11 +143,9 @@ static int __dwc2_lowlevel_hw_enable(struct dwc2_hsotg *hsotg)
 	if (ret)
 		return ret;
 
-	if (hsotg->clk) {
-		ret = clk_prepare_enable(hsotg->clk);
-		if (ret)
-			return ret;
-	}
+	ret = clk_bulk_prepare_enable(hsotg->num_clocks, hsotg->clocks);
+	if (ret)
+		return ret;
 
 	if (hsotg->uphy) {
 		ret = usb_phy_init(hsotg->uphy);
@@ -195,8 +193,7 @@ static int __dwc2_lowlevel_hw_disable(struct dwc2_hsotg *hsotg)
 	if (ret)
 		return ret;
 
-	if (hsotg->clk)
-		clk_disable_unprepare(hsotg->clk);
+	clk_bulk_disable_unprepare(hsotg->num_clocks, hsotg->clocks);
 
 	return 0;
 }
@@ -281,11 +278,12 @@ static int dwc2_lowlevel_hw_init(struct dwc2_hsotg *hsotg)
 	hsotg->plat = dev_get_platdata(hsotg->dev);
 
 	/* Clock */
-	hsotg->clk = devm_clk_get_optional(hsotg->dev, "otg");
-	if (IS_ERR(hsotg->clk)) {
+	ret = devm_clk_bulk_get_all(hsotg->dev, &hsotg->clocks);
+	if (ret < 0) {
 		dev_err(hsotg->dev, "cannot get otg clock\n");
-		return PTR_ERR(hsotg->clk);
+		return ret;
 	}
+	hsotg->num_clocks = ret;
 
 	/* Regulators */
 	for (i = 0; i < ARRAY_SIZE(hsotg->supplies); i++)
-- 
2.20.1