linux-kernel - [PATCH v2 3/6] usb: dwc3: dwc3-omap: Add dwc3_omap_set_utmi

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Date:	Mon, 19 May 2014 14:02:54 +0530
From:	George Cherian <george.cherian@...com>
To:	<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<linux-usb@...r.kernel.org>
CC:	<gregkh@...uxfoundation.org>, <balbi@...com>,
	George Cherian <george.cherian@...com>
Subject: [PATCH v2 3/6] usb: dwc3: dwc3-omap: Add dwc3_omap_set_utmi_mode() function

Move find and set the utmi mode to its own seperate function.
Improve code readability, decrease the dwc3_probe() size.

Signed-off-by: George Cherian <george.cherian@...com>
---
 drivers/usb/dwc3/dwc3-omap.c | 44 +++++++++++++++++++++++++-------------------
 1 file changed, 25 insertions(+), 19 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 0df8adf..2223ab8 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -396,6 +396,30 @@ static void dwc3_omap_map_offset(struct dwc3_omap *omap)
 	}
 }
 
+static void dwc3_omap_set_utmi_mode(struct dwc3_omap *omap)
+{
+	u32			reg;
+	struct device_node	*node = omap->dev->of_node;
+	int			utmi_mode = 0;
+
+	reg = dwc3_omap_read_utmi_status(omap);
+
+	of_property_read_u32(node, "utmi-mode", &utmi_mode);
+
+	switch (utmi_mode) {
+	case DWC3_OMAP_UTMI_MODE_SW:
+		reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
+		break;
+	case DWC3_OMAP_UTMI_MODE_HW:
+		reg &= ~USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
+		break;
+	default:
+		dev_dbg(omap->dev, "UNKNOWN utmi mode %d\n", utmi_mode);
+	}
+
+	dwc3_omap_write_utmi_status(omap, reg);
+}
+
 static int dwc3_omap_probe(struct platform_device *pdev)
 {
 	struct device_node	*node = pdev->dev.of_node;
@@ -409,8 +433,6 @@ static int dwc3_omap_probe(struct platform_device *pdev)
 	int			ret = -ENOMEM;
 	int			irq;
 
-	int			utmi_mode = 0;
-
 	u32			reg;
 
 	void __iomem		*base;
@@ -461,23 +483,7 @@ static int dwc3_omap_probe(struct platform_device *pdev)
 	}
 
 	dwc3_omap_map_offset(omap);
-
-	reg = dwc3_omap_read_utmi_status(omap);
-
-	of_property_read_u32(node, "utmi-mode", &utmi_mode);
-
-	switch (utmi_mode) {
-	case DWC3_OMAP_UTMI_MODE_SW:
-		reg |= USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
-		break;
-	case DWC3_OMAP_UTMI_MODE_HW:
-		reg &= ~USBOTGSS_UTMI_OTG_STATUS_SW_MODE;
-		break;
-	default:
-		dev_dbg(dev, "UNKNOWN utmi mode %d\n", utmi_mode);
-	}
-
-	dwc3_omap_write_utmi_status(omap, reg);
+	dwc3_omap_set_utmi_mode(omap);
 
 	/* check the DMA Status */
 	reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
-- 
1.8.3.1

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