usb: chipidea: udc: Help out kerneldoc headers that have tried, demote the others

Help with adding the odd description where they have been omitted or
where the format isn't quite right.  Demote all function headers which
are lacking any attempt of describing their arguments.

Fixes the following W=1 kernel build warning(s):

 drivers/usb/chipidea/udc.c:645: warning: Function parameter or member 'hwreq' not described in '_hardware_dequeue'
 drivers/usb/chipidea/udc.c:645: warning: Excess function parameter 'gadget' description in '_hardware_dequeue'
 drivers/usb/chipidea/udc.c:1326: warning: Function parameter or member 'ep' not described in 'ep_enable'
 drivers/usb/chipidea/udc.c:1326: warning: Function parameter or member 'desc' not described in 'ep_enable'
 drivers/usb/chipidea/udc.c:1393: warning: Function parameter or member 'ep' not described in 'ep_disable'
 drivers/usb/chipidea/udc.c:1433: warning: Function parameter or member 'ep' not described in 'ep_alloc_request'
 drivers/usb/chipidea/udc.c:1433: warning: Function parameter or member 'gfp_flags' not described in 'ep_alloc_request'
 drivers/usb/chipidea/udc.c:1454: warning: Function parameter or member 'ep' not described in 'ep_free_request'
 drivers/usb/chipidea/udc.c:1454: warning: Function parameter or member 'req' not described in 'ep_free_request'
 drivers/usb/chipidea/udc.c:1488: warning: Function parameter or member 'ep' not described in 'ep_queue'
 drivers/usb/chipidea/udc.c:1488: warning: Function parameter or member 'req' not described in 'ep_queue'
 drivers/usb/chipidea/udc.c:1488: warning: Function parameter or member 'gfp_flags' not described in 'ep_queue'
 drivers/usb/chipidea/udc.c:1512: warning: Function parameter or member 'ep' not described in 'ep_dequeue'
 drivers/usb/chipidea/udc.c:1512: warning: Function parameter or member 'req' not described in 'ep_dequeue'
 drivers/usb/chipidea/udc.c:1556: warning: Function parameter or member 'ep' not described in 'ep_set_halt'
 drivers/usb/chipidea/udc.c:1556: warning: Function parameter or member 'value' not described in 'ep_set_halt'
 drivers/usb/chipidea/udc.c:1566: warning: Function parameter or member 'ep' not described in 'ep_set_wedge'
 drivers/usb/chipidea/udc.c:1586: warning: Function parameter or member 'ep' not described in 'ep_fifo_flush'
 drivers/usb/chipidea/udc.c:1610: warning: cannot understand function prototype: 'const struct usb_ep_ops usb_ep_ops = '
 drivers/usb/chipidea/udc.c:1629: warning: Function parameter or member '_gadget' not described in 'ci_hdrc_gadget_connect'
 drivers/usb/chipidea/udc.c:1629: warning: Function parameter or member 'is_active' not described in 'ci_hdrc_gadget_connect'
 drivers/usb/chipidea/udc.c:1780: warning: cannot understand function prototype: 'const struct usb_gadget_ops usb_gadget_ops = '
 drivers/usb/chipidea/udc.c:1931: warning: Function parameter or member 'gadget' not described in 'ci_udc_stop'
 drivers/usb/chipidea/udc.c:1965: warning: Function parameter or member 'ci' not described in 'udc_irq'
 drivers/usb/chipidea/udc.c:2095: warning: Function parameter or member 'ci' not described in 'ci_hdrc_gadget_destroy'
 drivers/usb/chipidea/udc.c:2144: warning: Function parameter or member 'ci' not described in 'ci_hdrc_gadget_init'

Cc: Peter Chen <Peter.Chen@nxp.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20200703174148.2749969-13-lee.jones@linaro.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/udc.c

@@ -647,7 +647,7 @@ static int reprime_dtd(struct ci_hdrc *ci, struct ci_hw_ep *hwep,
 /**
  * _hardware_dequeue: handles a request at hardware level
  * @gadget: gadget
- * @hwep:   endpoint
+ * @hwreq:  request
  *
  * This function returns an error code
  */
@@ -1326,7 +1326,7 @@ __acquires(ci->lock)
 /******************************************************************************
  * ENDPT block
  *****************************************************************************/
-/**
+/*
  * ep_enable: configure endpoint, making it usable
  *
  * Check usb_ep_enable() at "usb_gadget.h" for details
@@ -1394,7 +1394,7 @@ static int ep_enable(struct usb_ep *ep,
 	return retval;
 }
 
-/**
+/*
  * ep_disable: endpoint is no longer usable
  *
  * Check usb_ep_disable() at "usb_gadget.h" for details
@@ -1434,7 +1434,7 @@ static int ep_disable(struct usb_ep *ep)
 	return retval;
 }
 
-/**
+/*
  * ep_alloc_request: allocate a request object to use with this endpoint
  *
  * Check usb_ep_alloc_request() at "usb_gadget.h" for details
@@ -1455,7 +1455,7 @@ static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
 	return (hwreq == NULL) ? NULL : &hwreq->req;
 }
 
-/**
+/*
  * ep_free_request: frees a request object
  *
  * Check usb_ep_free_request() at "usb_gadget.h" for details
@@ -1488,7 +1488,7 @@ static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
 	spin_unlock_irqrestore(hwep->lock, flags);
 }
 
-/**
+/*
  * ep_queue: queues (submits) an I/O request to an endpoint
  *
  * Check usb_ep_queue()* at usb_gadget.h" for details
@@ -1513,7 +1513,7 @@ static int ep_queue(struct usb_ep *ep, struct usb_request *req,
 	return retval;
 }
 
-/**
+/*
  * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
  *
  * Check usb_ep_dequeue() at "usb_gadget.h" for details
@@ -1557,7 +1557,7 @@ static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
 	return 0;
 }
 
-/**
+/*
  * ep_set_halt: sets the endpoint halt feature
  *
  * Check usb_ep_set_halt() at "usb_gadget.h" for details
@@ -1567,7 +1567,7 @@ static int ep_set_halt(struct usb_ep *ep, int value)
 	return _ep_set_halt(ep, value, true);
 }
 
-/**
+/*
  * ep_set_wedge: sets the halt feature and ignores clear requests
  *
  * Check usb_ep_set_wedge() at "usb_gadget.h" for details
@@ -1587,7 +1587,7 @@ static int ep_set_wedge(struct usb_ep *ep)
 	return usb_ep_set_halt(ep);
 }
 
-/**
+/*
  * ep_fifo_flush: flushes contents of a fifo
  *
  * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
@@ -1613,7 +1613,7 @@ static void ep_fifo_flush(struct usb_ep *ep)
 	spin_unlock_irqrestore(hwep->lock, flags);
 }
 
-/**
+/*
  * Endpoint-specific part of the API to the USB controller hardware
  * Check "usb_gadget.h" for details
  */
@@ -1632,7 +1632,7 @@ static const struct usb_ep_ops usb_ep_ops = {
 /******************************************************************************
  * GADGET block
  *****************************************************************************/
-/**
+/*
  * ci_hdrc_gadget_connect: caller makes sure gadget driver is binded
  */
 static void ci_hdrc_gadget_connect(struct usb_gadget *_gadget, int is_active)
@@ -1782,7 +1782,7 @@ static struct usb_ep *ci_udc_match_ep(struct usb_gadget *gadget,
 	return NULL;
 }
 
-/**
+/*
  * Device operations part of the API to the USB controller hardware,
  * which don't involve endpoints (or i/o)
  * Check  "usb_gadget.h" for details
@@ -1934,7 +1934,7 @@ static void ci_udc_stop_for_otg_fsm(struct ci_hdrc *ci)
 	mutex_unlock(&ci->fsm.lock);
 }
 
-/**
+/*
  * ci_udc_stop: unregister a gadget driver
  */
 static int ci_udc_stop(struct usb_gadget *gadget)
@@ -1965,7 +1965,7 @@ static int ci_udc_stop(struct usb_gadget *gadget)
 /******************************************************************************
  * BUS block
  *****************************************************************************/
-/**
+/*
  * udc_irq: ci interrupt handler
  *
  * This function returns IRQ_HANDLED if the IRQ has been handled
@@ -2096,7 +2096,7 @@ static int udc_start(struct ci_hdrc *ci)
 	return retval;
 }
 
-/**
+/*
  * ci_hdrc_gadget_destroy: parent remove must call this to remove UDC
  *
  * No interrupts active, the IRQ has been released
@@ -2146,7 +2146,7 @@ static void udc_id_switch_for_host(struct ci_hdrc *ci)
 
 /**
  * ci_hdrc_gadget_init - initialize device related bits
- * ci: the controller
+ * @ci: the controller
  *
  * This function initializes the gadget, if the device is "device capable".
  */