linux-kernel - [PATCH v6 13/22] mfd: omap-usb-host: override number of ports from platform data

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Message-ID: <1358347433-329-14-git-send-email-rogerq@ti.com>
Date:	Wed, 16 Jan 2013 16:43:44 +0200
From:	Roger Quadros <rogerq@...com>
To:	<balbi@...com>, <sameo@...ux.intel.com>, <tony@...mide.com>
CC:	<kishon@...com>, <sshtylyov@...sta.com>, <bjorn@...k.no>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>, <rogerq@...com>
Subject: [PATCH v6 13/22] mfd: omap-usb-host: override number of ports from platform data

Both OMAP4 and 5 exhibit the same revision ID in the REVISION register
but they have different number of ports i.e. 2 and 3 respectively.
So we can't rely on REVISION register for number of ports on OMAP5
and depend on platform data (or device tree) instead.

Signed-off-by: Roger Quadros <rogerq@...com>
---
 drivers/mfd/omap-usb-host.c            |   34 +++++++++++++++++++------------
 include/linux/platform_data/usb-omap.h |    1 +
 2 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 0ab6801..65d2ab4 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -493,19 +493,27 @@ static int usbhs_omap_probe(struct platform_device *pdev)
 	 */
 	pm_runtime_put_sync(dev);
 
-	switch (omap->usbhs_rev) {
-	case OMAP_USBHS_REV1:
-		omap->nports = 3;
-		break;
-	case OMAP_USBHS_REV2:
-		omap->nports = 2;
-		break;
-	default:
-		omap->nports = OMAP3_HS_USB_PORTS;
-		dev_dbg(dev,
-		  "USB HOST Rev : 0x%d not recognized, assuming %d ports\n",
-		   omap->usbhs_rev, omap->nports);
-		break;
+	/*
+	 * If platform data contains nports then use that
+	 * else make out number of ports from USBHS revision
+	 */
+	if (pdata->nports) {
+		omap->nports = pdata->nports;
+	} else {
+		switch (omap->usbhs_rev) {
+		case OMAP_USBHS_REV1:
+			omap->nports = 3;
+			break;
+		case OMAP_USBHS_REV2:
+			omap->nports = 2;
+			break;
+		default:
+			omap->nports = OMAP3_HS_USB_PORTS;
+			dev_dbg(dev,
+			 "USB HOST Rev:0x%d not recognized, assuming %d ports\n",
+			 omap->usbhs_rev, omap->nports);
+			break;
+		}
 	}
 
 	for (i = 0; i < omap->nports; i++)
diff --git a/include/linux/platform_data/usb-omap.h b/include/linux/platform_data/usb-omap.h
index 04c7537..925a4a7 100644
--- a/include/linux/platform_data/usb-omap.h
+++ b/include/linux/platform_data/usb-omap.h
@@ -39,6 +39,7 @@ enum usbhs_omap_port_mode {
 };
 
 struct usbhs_omap_platform_data {
+	int				nports;
 	enum usbhs_omap_port_mode	port_mode[OMAP3_HS_USB_PORTS];
 	int				reset_gpio_port[OMAP3_HS_USB_PORTS];
 	struct regulator		*regulator[OMAP3_HS_USB_PORTS];
-- 
1.7.4.1

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