USB: phy: fsl-usb: remove character device usage

No idea why this driver is using a char device node, statically
allocated, with no dynamic allocation or hook up with devtmpfs, along
with a reserverd major number, for "special" operations, not all of
which ever were implemented.

So just rip it out, as no one must be using it because no modern system
will ever actually create the /dev/ node it needs.

Cc: Felipe Balbi <balbi@kernel.org>
Reviewed-by: Ran Wang <ran.wang_1@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20200702072914.1072878-2-gregkh@linuxfoundation.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/phy/phy-fsl-usb.c

@@ -957,67 +957,6 @@ int usb_otg_start(struct platform_device *pdev)
 	return 0;
 }
 
-/* Char driver interface to control some OTG input */
-
-/*
- * Handle some ioctl command, such as get otg
- * status and set host suspend
- */
-static long fsl_otg_ioctl(struct file *file, unsigned int cmd,
-			  unsigned long arg)
-{
-	u32 retval = 0;
-
-	switch (cmd) {
-	case GET_OTG_STATUS:
-		retval = fsl_otg_dev->host_working;
-		break;
-
-	case SET_A_SUSPEND_REQ:
-		fsl_otg_dev->fsm.a_suspend_req_inf = arg;
-		break;
-
-	case SET_A_BUS_DROP:
-		fsl_otg_dev->fsm.a_bus_drop = arg;
-		break;
-
-	case SET_A_BUS_REQ:
-		fsl_otg_dev->fsm.a_bus_req = arg;
-		break;
-
-	case SET_B_BUS_REQ:
-		fsl_otg_dev->fsm.b_bus_req = arg;
-		break;
-
-	default:
-		break;
-	}
-
-	otg_statemachine(&fsl_otg_dev->fsm);
-
-	return retval;
-}
-
-static int fsl_otg_open(struct inode *inode, struct file *file)
-{
-	return 0;
-}
-
-static int fsl_otg_release(struct inode *inode, struct file *file)
-{
-	return 0;
-}
-
-static const struct file_operations otg_fops = {
-	.owner = THIS_MODULE,
-	.llseek = NULL,
-	.read = NULL,
-	.write = NULL,
-	.unlocked_ioctl = fsl_otg_ioctl,
-	.open = fsl_otg_open,
-	.release = fsl_otg_release,
-};
-
 static int fsl_otg_probe(struct platform_device *pdev)
 {
 	int ret;
@@ -1039,12 +978,6 @@ static int fsl_otg_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = register_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME, &otg_fops);
-	if (ret) {
-		dev_err(&pdev->dev, "unable to register FSL OTG device\n");
-		return ret;
-	}
-
 	return ret;
 }
 
@@ -1061,8 +994,6 @@ static int fsl_otg_remove(struct platform_device *pdev)
 	kfree(fsl_otg_dev->phy.otg);
 	kfree(fsl_otg_dev);
 
-	unregister_chrdev(FSL_OTG_MAJOR, FSL_OTG_NAME);
-
 	if (pdata->exit)
 		pdata->exit(pdev);
 

drivers/usb/phy/phy-fsl-usb.h

@@ -371,21 +371,7 @@ struct fsl_otg_config {
 	u8 otg_port;
 };
 
-/* For SRP and HNP handle */
-#define FSL_OTG_MAJOR		240
 #define FSL_OTG_NAME		"fsl-usb2-otg"
-/* Command to OTG driver ioctl */
-#define OTG_IOCTL_MAGIC		FSL_OTG_MAJOR
-/* if otg work as host, it should return 1, otherwise return 0 */
-#define GET_OTG_STATUS		_IOR(OTG_IOCTL_MAGIC, 1, int)
-#define SET_A_SUSPEND_REQ	_IOW(OTG_IOCTL_MAGIC, 2, int)
-#define SET_A_BUS_DROP		_IOW(OTG_IOCTL_MAGIC, 3, int)
-#define SET_A_BUS_REQ		_IOW(OTG_IOCTL_MAGIC, 4, int)
-#define SET_B_BUS_REQ		_IOW(OTG_IOCTL_MAGIC, 5, int)
-#define GET_A_SUSPEND_REQ	_IOR(OTG_IOCTL_MAGIC, 6, int)
-#define GET_A_BUS_DROP		_IOR(OTG_IOCTL_MAGIC, 7, int)
-#define GET_A_BUS_REQ		_IOR(OTG_IOCTL_MAGIC, 8, int)
-#define GET_B_BUS_REQ		_IOR(OTG_IOCTL_MAGIC, 9, int)
 
 void fsl_otg_add_timer(struct otg_fsm *fsm, void *timer);
 void fsl_otg_del_timer(struct otg_fsm *fsm, void *timer);