MLK-18319-2 usb: cdns3: gadget: delete the unless code

Confirmed from CDNS, this code is from bare metal, and not needed
for Linux. Below are their response:

This is alternative deferred interrupt.
This is intended to be used in Bare Metal to not block system in
interrupt.
This was not fully checked in Linux, so we do not recommend to use it
there.

Reviewed-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>

1 files changed, 0 insertions, 38 deletions

diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index 46678a54502c..b0ad5f675407 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -68,9 +68,6 @@ static void cdns_check_ep0_interrupt_proceed(struct usb_ss_dev *usb_ss,
 	int dir);
 static void cdns_check_usb_interrupt_proceed(struct usb_ss_dev *usb_ss,
 	u32 usb_ists);
-#ifdef CDNS_THREADED_IRQ_HANDLING
-static irqreturn_t cdns_irq_handler(int irq, void *_usb_ss);
-#endif
 static int usb_ss_gadget_ep0_enable(struct usb_ep *ep,
 	const struct usb_endpoint_descriptor *desc);
 static int usb_ss_gadget_ep0_disable(struct usb_ep *ep);
@@ -838,10 +835,6 @@ static int cdns_req_ep0_set_configuration(struct usb_ss_dev *usb_ss,
 			&usb_ss->ep_match_list, ep_match_pending_list)
 			cdns_ep_config(usb_ss_ep);
 
-#ifdef CDNS_THREADED_IRQ_HANDLING
-		usb_ss->ep_ien = gadget_readl(usb_ss, &usb_ss->regs->ep_ien)
-			| EP_IEN__EOUTEN0__MASK | EP_IEN__EINEN0__MASK;
-#endif
 		result = cdns_get_setup_ret(usb_ss, ctrl_req);
 
 		if (result != 0)
@@ -1259,31 +1252,6 @@ static void cdns_check_usb_interrupt_proceed(struct usb_ss_dev *usb_ss,
 	gadget_writel(usb_ss, &usb_ss->regs->usb_ists, (1uL << interrupt_bit));
 }
 
-#ifdef CDNS_THREADED_IRQ_HANDLING
-static irqreturn_t cdns_irq_handler(int irq, void *_usb_ss)
-{
-	struct usb_ss_dev *usb_ss = _usb_ss;
-
-	usb_ss->usb_ien = gadget_readl(usb_ss, &usb_ss->regs->usb_ien);
-	usb_ss->ep_ien = gadget_readl(usb_ss, &usb_ss->regs->ep_ien);
-
-	if (!gadget_readl(usb_ss, &usb_ss->regs->usb_ists)
-		&& !gadget_readl(usb_ss, &usb_ss->regs->ep_ists)) {
-		dev_dbg(&usb_ss->dev, "--BUBBLE INTERRUPT 0 !!!\n");
-		if (gadget_readl(usb_ss, &usb_ss->regs->usb_sts) &
-				USB_STS__CFGSTS__MASK)
-			return IRQ_HANDLED;
-		return IRQ_NONE;
-	}
-
-	gadget_writel(usb_ss, &usb_ss->regs->usb_ien, 0);
-	gadget_writel(usb_ss, &usb_ss->regs->ep_ien, 0);
-
-	gadget_readl(usb_ss, &usb_ss->regs->dma_axi_ctrl);
-	return IRQ_WAKE_THREAD;
-}
-#endif
-
 /**
  * cdns_irq_handler - irq line interrupt handler
  * @cdns: cdns3 instance
@@ -1353,12 +1321,6 @@ static irqreturn_t cdns_irq_handler_thread(struct cdns3 *cdns)
 irqend:
 
 	spin_unlock_irqrestore(&usb_ss->lock, flags);
-#ifdef CDNS_THREADED_IRQ_HANDLING
-	local_irq_save(flags);
-	gadget_writel(usb_ss, &usb_ss->regs->usb_ien, usb_ss->usb_ien);
-	gadget_writel(usb_ss, &usb_ss->regs->ep_ien, usb_ss->ep_ien);
-	local_irq_restore(flags);
-#endif
 	return ret;
 }