rtc: cmos: Call rtc_wake_setup() from cmos_do_probe()

To reduce code duplication, move the invocation of rtc_wake_setup()
into cmos_do_probe() and simplify the callers of the latter.

No intentional functional impact.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/2143522.irdbgypaU6@kreacherSigned-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-cmos.c

@@ -744,6 +744,7 @@ static irqreturn_t cmos_interrupt(int irq, void *p)
 		return IRQ_NONE;
 }
 
+static inline void rtc_wake_setup(struct device *dev);
 static void cmos_wake_setup(struct device *dev);
 
 #ifdef	CONFIG_PNP
@@ -938,6 +939,13 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
 	nvmem_cfg.size = address_space - NVRAM_OFFSET;
 	devm_rtc_nvmem_register(cmos_rtc.rtc, &nvmem_cfg);
 
+	/*
+	 * Everything has gone well so far, so by default register a handler for
+	 * the ACPI RTC fixed event.
+	 */
+	if (!info)
+		rtc_wake_setup(dev);
+
 	dev_info(dev, "%s%s, %d bytes nvram%s\n",
 		 !is_valid_irq(rtc_irq) ? "no alarms" :
 		 cmos_rtc.mon_alrm ? "alarms up to one year" :
@@ -1357,7 +1365,7 @@ static void rtc_wake_setup(struct device *dev)
 
 static int cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
 {
-	int irq, ret;
+	int irq;
 
 	if (pnp_port_start(pnp, 0) == 0x70 && !pnp_irq_valid(pnp, 0)) {
 		irq = 0;
@@ -1373,13 +1381,7 @@ static int cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
 		irq = pnp_irq(pnp, 0);
 	}
 
-	ret = cmos_do_probe(&pnp->dev, pnp_get_resource(pnp, IORESOURCE_IO, 0), irq);
-	if (ret)
-		return ret;
-
-	rtc_wake_setup(&pnp->dev);
-
-	return 0;
+	return cmos_do_probe(&pnp->dev, pnp_get_resource(pnp, IORESOURCE_IO, 0), irq);
 }
 
 static void cmos_pnp_remove(struct pnp_dev *pnp)
@@ -1463,7 +1465,7 @@ static inline void cmos_of_init(struct platform_device *pdev) {}
 static int __init cmos_platform_probe(struct platform_device *pdev)
 {
 	struct resource *resource;
-	int irq, ret;
+	int irq;
 
 	cmos_of_init(pdev);
 
@@ -1475,13 +1477,7 @@ static int __init cmos_platform_probe(struct platform_device *pdev)
 	if (irq < 0)
 		irq = -1;
 
-	ret = cmos_do_probe(&pdev->dev, resource, irq);
-	if (ret)
-		return ret;
-
-	rtc_wake_setup(&pdev->dev);
-
-	return 0;
+	return cmos_do_probe(&pdev->dev, resource, irq);
 }
 
 static int cmos_platform_remove(struct platform_device *pdev)