[media] media: rc: nuvoton: remove interrupt handling for wakeup

There is a rudimentary ISR for handling interrupts generated by the
wakeup part of the chip. Interrupts however have never been enabled
in the wakeup part.
Also, now that we can set the wakeup sequence via sysfs, there's in
general no need to enable interrupts in the wakeup part.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/rc/nuvoton-cir.c

@@ -480,10 +480,8 @@ static void nvt_cir_wake_ldev_init(struct nvt_dev *nvt)
 
 	nvt_set_ioaddr(nvt, &nvt->cir_wake_addr);
 
-	nvt_cr_write(nvt, nvt->cir_wake_irq, CR_CIR_IRQ_RSRC);
-
-	nvt_dbg("CIR Wake initialized, base io port address: 0x%lx, irq: %d",
-		nvt->cir_wake_addr, nvt->cir_wake_irq);
+	nvt_dbg("CIR Wake initialized, base io port address: 0x%lx",
+		nvt->cir_wake_addr);
 }
 
 /* clear out the hardware's cir rx fifo */
@@ -997,51 +995,6 @@ static irqreturn_t nvt_cir_isr(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-/* Interrupt service routine for CIR Wake */
-static irqreturn_t nvt_cir_wake_isr(int irq, void *data)
-{
-	u8 status, iren, val;
-	struct nvt_dev *nvt = data;
-	unsigned long flags;
-
-	nvt_dbg_wake("%s firing", __func__);
-
-	spin_lock_irqsave(&nvt->nvt_lock, flags);
-
-	status = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IRSTS);
-	iren = nvt_cir_wake_reg_read(nvt, CIR_WAKE_IREN);
-
-	/* IRQ may be shared with CIR, therefore check for each
-	 * status bit whether the related interrupt source is enabled
-	 */
-	if (!(status & iren)) {
-		spin_unlock_irqrestore(&nvt->nvt_lock, flags);
-		return IRQ_NONE;
-	}
-
-	if (status & CIR_WAKE_IRSTS_IR_PENDING)
-		nvt_clear_cir_wake_fifo(nvt);
-
-	nvt_cir_wake_reg_write(nvt, status, CIR_WAKE_IRSTS);
-	nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IRSTS);
-
-	if ((status & CIR_WAKE_IRSTS_PE) &&
-	    (nvt->wake_state == ST_WAKE_START)) {
-		while (nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY_IDX)) {
-			val = nvt_cir_wake_reg_read(nvt, CIR_WAKE_RD_FIFO_ONLY);
-			nvt_dbg("setting wake up key: 0x%x", val);
-		}
-
-		nvt_cir_wake_reg_write(nvt, 0, CIR_WAKE_IREN);
-		nvt->wake_state = ST_WAKE_FINISH;
-	}
-
-	spin_unlock_irqrestore(&nvt->nvt_lock, flags);
-
-	nvt_dbg_wake("%s done", __func__);
-	return IRQ_HANDLED;
-}
-
 static void nvt_disable_cir(struct nvt_dev *nvt)
 {
 	unsigned long flags;
@@ -1145,8 +1098,6 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
 	nvt->cir_irq  = pnp_irq(pdev, 0);
 
 	nvt->cir_wake_addr = pnp_port_start(pdev, 1);
-	/* irq is always shared between cir and cir wake */
-	nvt->cir_wake_irq  = nvt->cir_irq;
 
 	nvt->cr_efir = CR_EFIR;
 	nvt->cr_efdr = CR_EFDR;
@@ -1222,11 +1173,6 @@ static int nvt_probe(struct pnp_dev *pdev, const struct pnp_device_id *dev_id)
 			    CIR_IOREG_LENGTH, NVT_DRIVER_NAME "-wake"))
 		goto exit_unregister_device;
 
-	if (devm_request_irq(&pdev->dev, nvt->cir_wake_irq,
-			     nvt_cir_wake_isr, IRQF_SHARED,
-			     NVT_DRIVER_NAME "-wake", (void *)nvt))
-		goto exit_unregister_device;
-
 	ret = device_create_file(&rdev->dev, &dev_attr_wakeup_data);
 	if (ret)
 		goto exit_unregister_device;

drivers/media/rc/nuvoton-cir.h

@@ -104,7 +104,6 @@ struct nvt_dev {
 	unsigned long cir_addr;
 	unsigned long cir_wake_addr;
 	int cir_irq;
-	int cir_wake_irq;
 
 	enum nvt_chip_ver chip_ver;
 	/* hardware id */