diff mbox series

[2/3] usb: renesas_usbhs: Enable support for more than two clks

Message ID 20210630173042.186394-2-aford173@gmail.com
State New
Headers show
Series [1/3] dt-bindings: usb: renesas,usbhs: Support external ref clock | expand

Commit Message

Adam Ford June 30, 2021, 5:30 p.m. UTC
The RZ/G2 boards expect there to be an external clock reference for
USBHS controller, but this could be set by a programmable clock.
For those devices using a programmable clock, there need to be two
additional clocks beyond the internal reference clocks:

rcar-usb2-clock-sel to specify we using an external clock, and
the external reference clock itself.

Make this driver dynamically enable all the clocks assigned to it
instead of only enabling the first one or two clocks.

Signed-off-by: Adam Ford <aford173@gmail.com>
diff mbox series

Patch

diff --git a/drivers/usb/renesas_usbhs/common.c b/drivers/usb/renesas_usbhs/common.c
index 3af91b2b8f76..255e4bd68ed3 100644
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -297,6 +297,8 @@  static bool usbhsc_is_multi_clks(struct usbhs_priv *priv)
 
 static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv)
 {
+	unsigned int i;
+
 	if (!usbhsc_is_multi_clks(priv))
 		return 0;
 
@@ -309,11 +311,13 @@  static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv)
 	 * To backward compatibility with old DT, this driver checks the return
 	 * value if it's -ENOENT or not.
 	 */
-	priv->clks[1] = of_clk_get(dev_of_node(dev), 1);
-	if (PTR_ERR(priv->clks[1]) == -ENOENT)
-		priv->clks[1] = NULL;
-	else if (IS_ERR(priv->clks[1]))
-		return PTR_ERR(priv->clks[1]);
+	for (i = 1; i < ARRAY_SIZE(priv->clks); i++) {
+		priv->clks[1] = of_clk_get(dev->of_node, i);
+		if (PTR_ERR(priv->clks[i]) == -ENOENT)
+			priv->clks[i] = NULL;
+		else if (IS_ERR(priv->clks[i]))
+			return PTR_ERR(priv->clks[i]);
+	}
 
 	return 0;
 }