From: Al Cooper <alcooperx@gmail.com>
Date: Wed, 19 Jul 2017 19:11:42 +0000 (-0400)
Subject: usb: bdc: Add clock enable for new chips with a separate BDC clock
X-Git-Tag: v4.14-rc1~150^2~31^2~14
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=c87dca047849b0fd75c48a7e0375afb93047446c;p=linux.git

usb: bdc: Add clock enable for new chips with a separate BDC clock

Newer SoC's have added a BDC clock to the Device Tree, so get
and enable it.

Signed-off-by: Al Cooper <alcooperx@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
---

diff --git a/drivers/usb/gadget/udc/bdc/bdc_core.c b/drivers/usb/gadget/udc/bdc/bdc_core.c
index e9bd8d4abca0..dda7b438ada8 100644
--- a/drivers/usb/gadget/udc/bdc/bdc_core.c
+++ b/drivers/usb/gadget/udc/bdc/bdc_core.c
@@ -27,6 +27,7 @@
 #include <linux/moduleparam.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/gadget.h>
+#include <linux/clk.h>
 
 #include "bdc.h"
 #include "bdc_dbg.h"
@@ -452,8 +453,22 @@ static int bdc_probe(struct platform_device *pdev)
 	int irq;
 	u32 temp;
 	struct device *dev = &pdev->dev;
+	struct clk *clk;
 
 	dev_dbg(dev, "%s()\n", __func__);
+
+	clk = devm_clk_get(dev, "sw_usbd");
+	if (IS_ERR(clk)) {
+		dev_info(dev, "Clock not found in Device Tree\n");
+		clk = NULL;
+	}
+
+	ret = clk_prepare_enable(clk);
+	if (ret) {
+		dev_err(dev, "could not enable clock\n");
+		return ret;
+	}
+
 	bdc = devm_kzalloc(dev, sizeof(*bdc), GFP_KERNEL);
 	if (!bdc)
 		return -ENOMEM;