[U-Boot] [PATCH 2/5] usb: host: dwc2: add support for clk

[Patrick Delaunay]

Add support for clock with driver model.

Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
---

 drivers/usb/host/dwc2.c | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
index 6c46979..5c4c21b 100644
--- a/drivers/usb/host/dwc2.c
+++ b/drivers/usb/host/dwc2.c
@@ -5,13 +5,14 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <dm.h>
 #include <errno.h>
 #include <generic-phy.h>
-#include <usb.h>
 #include <malloc.h>
 #include <memalign.h>
 #include <phys2bus.h>
+#include <usb.h>
 #include <usbroothubdes.h>
 #include <wait_bit.h>
 #include <asm/io.h>
@@ -37,6 +38,7 @@ struct dwc2_priv {
 	struct udevice *vbus_supply;
 #endif
 	struct phy phy;
+	struct clk_bulk clks;
 #else
 	uint8_t *aligned_buffer;
 	uint8_t *status_buffer;
@@ -1371,6 +1373,26 @@ static int dwc2_shutdown_phy(struct udevice *dev)
 	return 0;
 }
 
+static int dwc2_clk_init(struct udevice *dev)
+{
+	struct dwc2_priv *priv = dev_get_priv(dev);
+	int ret;
+
+	ret = clk_get_bulk(dev, &priv->clks);
+	if (ret == -ENOSYS || ret == -ENOENT)
+		return 0;
+	if (ret)
+		return ret;
+
+	ret = clk_enable_bulk(&priv->clks);
+	if (ret) {
+		clk_release_bulk(&priv->clks);
+		return ret;
+	}
+
+	return 0;
+}
+
 static int dwc2_usb_probe(struct udevice *dev)
 {
 	struct dwc2_priv *priv = dev_get_priv(dev);
@@ -1379,6 +1401,10 @@ static int dwc2_usb_probe(struct udevice *dev)
 
 	bus_priv->desc_before_addr = true;
 
+	ret = dwc2_clk_init(dev);
+	if (ret)
+		return ret;
+
 	ret = dwc2_setup_phy(dev);
 	if (ret)
 		return ret;
@@ -1400,6 +1426,7 @@ static int dwc2_usb_remove(struct udevice *dev)
 	dwc2_uninit_common(priv->regs);
 
 	reset_release_bulk(&priv->resets);
+	clk_release_bulk(&priv->clks);
 
 	return 0;
 }
-- 
2.7.4