2 files changed, 57 insertions, 17 deletions

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index f4c09951b517..699ab9abdc47 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -745,6 +745,38 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
 	return 0;
 }
 
+static int dwc3_clk_enable(struct dwc3 *dwc)
+{
+	int ret;
+
+	ret = clk_prepare_enable(dwc->bus_clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(dwc->ref_clk);
+	if (ret)
+		goto disable_bus_clk;
+
+	ret = clk_prepare_enable(dwc->susp_clk);
+	if (ret)
+		goto disable_ref_clk;
+
+	return 0;
+
+disable_ref_clk:
+	clk_disable_unprepare(dwc->ref_clk);
+disable_bus_clk:
+	clk_disable_unprepare(dwc->bus_clk);
+	return ret;
+}
+
+static void dwc3_clk_disable(struct dwc3 *dwc)
+{
+	clk_disable_unprepare(dwc->susp_clk);
+	clk_disable_unprepare(dwc->ref_clk);
+	clk_disable_unprepare(dwc->bus_clk);
+}
+
 static void dwc3_core_exit(struct dwc3 *dwc)
 {
 	dwc3_event_buffers_cleanup(dwc);
@@ -758,7 +790,7 @@ static void dwc3_core_exit(struct dwc3 *dwc)
 	usb_phy_set_suspend(dwc->usb3_phy, 1);
 	phy_power_off(dwc->usb2_generic_phy);
 	phy_power_off(dwc->usb3_generic_phy);
-	clk_bulk_disable_unprepare(dwc->num_clks, dwc->clks);
+	dwc3_clk_disable(dwc);
 	reset_control_assert(dwc->reset);
 }
 
@@ -1605,25 +1637,31 @@ static int dwc3_probe(struct platform_device *pdev)
 		return PTR_ERR(dwc->reset);
 
 	if (dev->of_node) {
-		ret = devm_clk_bulk_get_all(dev, &dwc->clks);
-		if (ret == -EPROBE_DEFER)
-			return ret;
 		/*
 		 * Clocks are optional, but new DT platforms should support all
 		 * clocks as required by the DT-binding.
 		 */
-		if (ret < 0)
-			dwc->num_clks = 0;
-		else
-			dwc->num_clks = ret;
-
+		dwc->bus_clk = devm_clk_get_optional(dev, "bus_early");
+		if (IS_ERR(dwc->bus_clk))
+			return dev_err_probe(dev, PTR_ERR(dwc->bus_clk),
+					     "could not get bus clock\n");
+
+		dwc->ref_clk = devm_clk_get_optional(dev, "ref");
+		if (IS_ERR(dwc->ref_clk))
+			return dev_err_probe(dev, PTR_ERR(dwc->ref_clk),
+					     "could not get ref clock\n");
+
+		dwc->susp_clk = devm_clk_get_optional(dev, "suspend");
+		if (IS_ERR(dwc->susp_clk))
+			return dev_err_probe(dev, PTR_ERR(dwc->susp_clk),
+					     "could not get suspend clock\n");
 	}
 
 	ret = reset_control_deassert(dwc->reset);
 	if (ret)
 		return ret;
 
-	ret = clk_bulk_prepare_enable(dwc->num_clks, dwc->clks);
+	ret = dwc3_clk_enable(dwc);
 	if (ret)
 		goto assert_reset;
 
@@ -1711,7 +1749,7 @@ err1:
 	pm_runtime_disable(&pdev->dev);
 
 disable_clks:
-	clk_bulk_disable_unprepare(dwc->num_clks, dwc->clks);
+	dwc3_clk_disable(dwc);
 assert_reset:
 	reset_control_assert(dwc->reset);
 
@@ -1755,7 +1793,7 @@ static int dwc3_core_init_for_resume(struct dwc3 *dwc)
 	if (ret)
 		return ret;
 
-	ret = clk_bulk_prepare_enable(dwc->num_clks, dwc->clks);
+	ret = dwc3_clk_enable(dwc);
 	if (ret)
 		goto assert_reset;
 
@@ -1766,7 +1804,7 @@ static int dwc3_core_init_for_resume(struct dwc3 *dwc)
 	return 0;
 
 disable_clks:
-	clk_bulk_disable_unprepare(dwc->num_clks, dwc->clks);
+	dwc3_clk_disable(dwc);
 assert_reset:
 	reset_control_assert(dwc->reset);
 
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index e1cc3f7398fb..45cfa7d9f27a 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -978,8 +978,9 @@ struct dwc3_scratchpad_array {
  * @eps: endpoint array
  * @gadget: device side representation of the peripheral controller
  * @gadget_driver: pointer to the gadget driver
- * @clks: array of clocks
- * @num_clks: number of clocks
+ * @bus_clk: clock for accessing the registers
+ * @ref_clk: reference clock
+ * @susp_clk: clock used when the SS phy is in low power (S3) state
  * @reset: reset control
  * @regs: base address for our registers
  * @regs_size: address space size
@@ -1134,8 +1135,9 @@ struct dwc3 {
 	struct usb_gadget	*gadget;
 	struct usb_gadget_driver *gadget_driver;
 
-	struct clk_bulk_data	*clks;
-	int			num_clks;
+	struct clk		*bus_clk;
+	struct clk		*ref_clk;
+	struct clk		*susp_clk;
 
 	struct reset_control	*reset;