mailbox: stm32-ipcc: Update wakeup management

The wakeup specific IRQ management is no more needed to wake up the
stm32 platform. A relationship has been established between the EXTI and
the RX IRQ, just need to declare the EXTI interrupt instead of the
IPCC RX IRQ.

Signed-off-by: Alexandre Torgue <[e-mail]>
Signed-off-by: Fabien Dessenne <[e-mail]>
Signed-off-by: Jassi Brar <[e-mail]>

drivers/mailbox/stm32-ipcc.c

···
 	struct clk *clk;
 	spinlock_t lock; /* protect access to IPCC registers */
 	int irqs[IPCC_IRQ_NUM];
-	int wkp;
 	u32 proc_id;
 	u32 n_chans;
 	u32 xcr;
···
 
 	/* wakeup */
 	if (of_property_read_bool(np, "wakeup-source")) {
-		ipcc->wkp = platform_get_irq_byname(pdev, "wakeup");
-		if (ipcc->wkp < 0) {
-			if (ipcc->wkp != -EPROBE_DEFER)
-				dev_err(dev, "could not get wakeup IRQ\n");
-			ret = ipcc->wkp;
-			goto err_clk;
-		}
-
 		device_set_wakeup_capable(dev, true);
-		ret = dev_pm_set_dedicated_wake_irq(dev, ipcc->wkp);
+
+		ret = dev_pm_set_wake_irq(dev, ipcc->irqs[IPCC_IRQ_RX]);
 		if (ret) {
 			dev_err(dev, "Failed to set wake up irq\n");
 			goto err_init_wkp;
···
 	return 0;
 
 err_irq_wkp:
-	if (ipcc->wkp)
+	if (of_property_read_bool(np, "wakeup-source"))
 		dev_pm_clear_wake_irq(dev);
 err_init_wkp:
-	device_init_wakeup(dev, false);
+	device_set_wakeup_capable(dev, false);
 err_clk:
 	clk_disable_unprepare(ipcc->clk);
 	return ret;
···
 
 static int stm32_ipcc_remove(struct platform_device *pdev)
 {
-	struct stm32_ipcc *ipcc = platform_get_drvdata(pdev);
+	struct device *dev = &pdev->dev;
 
-	if (ipcc->wkp)
+	if (of_property_read_bool(dev->of_node, "wakeup-source"))
 		dev_pm_clear_wake_irq(&pdev->dev);
 
-	device_init_wakeup(&pdev->dev, false);
+	device_set_wakeup_capable(dev, false);
 
 	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
-static void stm32_ipcc_set_irq_wake(struct device *dev, bool enable)
-{
-	struct stm32_ipcc *ipcc = dev_get_drvdata(dev);
-	unsigned int i;
-
-	if (device_may_wakeup(dev))
-		for (i = 0; i < IPCC_IRQ_NUM; i++)
-			irq_set_irq_wake(ipcc->irqs[i], enable);
-}
-
 static int stm32_ipcc_suspend(struct device *dev)
 {
 	struct stm32_ipcc *ipcc = dev_get_drvdata(dev);
···
 	ipcc->xmr = readl_relaxed(ipcc->reg_proc + IPCC_XMR);
 	ipcc->xcr = readl_relaxed(ipcc->reg_proc + IPCC_XCR);
 
-	stm32_ipcc_set_irq_wake(dev, true);
-
 	return 0;
 }
 
 static int stm32_ipcc_resume(struct device *dev)
 {
 	struct stm32_ipcc *ipcc = dev_get_drvdata(dev);
-
-	stm32_ipcc_set_irq_wake(dev, false);
 
 	writel_relaxed(ipcc->xmr, ipcc->reg_proc + IPCC_XMR);
 	writel_relaxed(ipcc->xcr, ipcc->reg_proc + IPCC_XCR);