1 files changed, 191 insertions, 175 deletions

diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index d4f6c4dd42c4..7f560937bf7c 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -750,6 +750,168 @@ static irqreturn_t cmos_interrupt(int irq, void *p)
 		return IRQ_NONE;
 }
 
+#ifdef	CONFIG_ACPI
+
+#include <linux/acpi.h>
+
+static u32 rtc_handler(void *context)
+{
+	struct device *dev = context;
+	struct cmos_rtc *cmos = dev_get_drvdata(dev);
+	unsigned char rtc_control = 0;
+	unsigned char rtc_intr;
+	unsigned long flags;
+
+
+	/*
+	 * Always update rtc irq when ACPI is used as RTC Alarm.
+	 * Or else, ACPI SCI is enabled during suspend/resume only,
+	 * update rtc irq in that case.
+	 */
+	if (cmos_use_acpi_alarm())
+		cmos_interrupt(0, (void *)cmos->rtc);
+	else {
+		/* Fix me: can we use cmos_interrupt() here as well? */
+		spin_lock_irqsave(&rtc_lock, flags);
+		if (cmos_rtc.suspend_ctrl)
+			rtc_control = CMOS_READ(RTC_CONTROL);
+		if (rtc_control & RTC_AIE) {
+			cmos_rtc.suspend_ctrl &= ~RTC_AIE;
+			CMOS_WRITE(rtc_control, RTC_CONTROL);
+			rtc_intr = CMOS_READ(RTC_INTR_FLAGS);
+			rtc_update_irq(cmos->rtc, 1, rtc_intr);
+		}
+		spin_unlock_irqrestore(&rtc_lock, flags);
+	}
+
+	pm_wakeup_hard_event(dev);
+	acpi_clear_event(ACPI_EVENT_RTC);
+	acpi_disable_event(ACPI_EVENT_RTC, 0);
+	return ACPI_INTERRUPT_HANDLED;
+}
+
+static void acpi_rtc_event_setup(struct device *dev)
+{
+	if (acpi_disabled)
+		return;
+
+	acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, dev);
+	/*
+	 * After the RTC handler is installed, the Fixed_RTC event should
+	 * be disabled. Only when the RTC alarm is set will it be enabled.
+	 */
+	acpi_clear_event(ACPI_EVENT_RTC);
+	acpi_disable_event(ACPI_EVENT_RTC, 0);
+}
+
+static void acpi_rtc_event_cleanup(void)
+{
+	if (acpi_disabled)
+		return;
+
+	acpi_remove_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler);
+}
+
+static void rtc_wake_on(struct device *dev)
+{
+	acpi_clear_event(ACPI_EVENT_RTC);
+	acpi_enable_event(ACPI_EVENT_RTC, 0);
+}
+
+static void rtc_wake_off(struct device *dev)
+{
+	acpi_disable_event(ACPI_EVENT_RTC, 0);
+}
+
+#ifdef CONFIG_X86
+/* Enable use_acpi_alarm mode for Intel platforms no earlier than 2015 */
+static void use_acpi_alarm_quirks(void)
+{
+	if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
+		return;
+
+	if (!is_hpet_enabled())
+		return;
+
+	if (dmi_get_bios_year() < 2015)
+		return;
+
+	use_acpi_alarm = true;
+}
+#else
+static inline void use_acpi_alarm_quirks(void) { }
+#endif
+
+static void acpi_cmos_wake_setup(struct device *dev)
+{
+	if (acpi_disabled)
+		return;
+
+	use_acpi_alarm_quirks();
+
+	cmos_rtc.wake_on = rtc_wake_on;
+	cmos_rtc.wake_off = rtc_wake_off;
+
+	/* ACPI tables bug workaround. */
+	if (acpi_gbl_FADT.month_alarm && !acpi_gbl_FADT.day_alarm) {
+		dev_dbg(dev, "bogus FADT month_alarm (%d)\n",
+			acpi_gbl_FADT.month_alarm);
+		acpi_gbl_FADT.month_alarm = 0;
+	}
+
+	cmos_rtc.day_alrm = acpi_gbl_FADT.day_alarm;
+	cmos_rtc.mon_alrm = acpi_gbl_FADT.month_alarm;
+	cmos_rtc.century = acpi_gbl_FADT.century;
+
+	if (acpi_gbl_FADT.flags & ACPI_FADT_S4_RTC_WAKE)
+		dev_info(dev, "RTC can wake from S4\n");
+
+	/* RTC always wakes from S1/S2/S3, and often S4/STD */
+	device_init_wakeup(dev, 1);
+}
+
+static void cmos_check_acpi_rtc_status(struct device *dev,
+					      unsigned char *rtc_control)
+{
+	struct cmos_rtc *cmos = dev_get_drvdata(dev);
+	acpi_event_status rtc_status;
+	acpi_status status;
+
+	if (acpi_gbl_FADT.flags & ACPI_FADT_FIXED_RTC)
+		return;
+
+	status = acpi_get_event_status(ACPI_EVENT_RTC, &rtc_status);
+	if (ACPI_FAILURE(status)) {
+		dev_err(dev, "Could not get RTC status\n");
+	} else if (rtc_status & ACPI_EVENT_FLAG_SET) {
+		unsigned char mask;
+		*rtc_control &= ~RTC_AIE;
+		CMOS_WRITE(*rtc_control, RTC_CONTROL);
+		mask = CMOS_READ(RTC_INTR_FLAGS);
+		rtc_update_irq(cmos->rtc, 1, mask);
+	}
+}
+
+#else /* !CONFIG_ACPI */
+
+static inline void acpi_rtc_event_setup(struct device *dev)
+{
+}
+
+static inline void acpi_rtc_event_cleanup(void)
+{
+}
+
+static inline void acpi_cmos_wake_setup(struct device *dev)
+{
+}
+
+static inline void cmos_check_acpi_rtc_status(struct device *dev,
+					      unsigned char *rtc_control)
+{
+}
+#endif /* CONFIG_ACPI */
+
 #ifdef	CONFIG_PNP
 #define	INITSECTION
 
@@ -833,19 +995,27 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
 		if (info->address_space)
 			address_space = info->address_space;
 
-		if (info->rtc_day_alarm && info->rtc_day_alarm < 128)
-			cmos_rtc.day_alrm = info->rtc_day_alarm;
-		if (info->rtc_mon_alarm && info->rtc_mon_alarm < 128)
-			cmos_rtc.mon_alrm = info->rtc_mon_alarm;
-		if (info->rtc_century && info->rtc_century < 128)
-			cmos_rtc.century = info->rtc_century;
+		cmos_rtc.day_alrm = info->rtc_day_alarm;
+		cmos_rtc.mon_alrm = info->rtc_mon_alarm;
+		cmos_rtc.century = info->rtc_century;
 
 		if (info->wake_on && info->wake_off) {
 			cmos_rtc.wake_on = info->wake_on;
 			cmos_rtc.wake_off = info->wake_off;
 		}
+	} else {
+		acpi_cmos_wake_setup(dev);
 	}
 
+	if (cmos_rtc.day_alrm >= 128)
+		cmos_rtc.day_alrm = 0;
+
+	if (cmos_rtc.mon_alrm >= 128)
+		cmos_rtc.mon_alrm = 0;
+
+	if (cmos_rtc.century >= 128)
+		cmos_rtc.century = 0;
+
 	cmos_rtc.dev = dev;
 	dev_set_drvdata(dev, &cmos_rtc);
 
@@ -933,6 +1103,13 @@ cmos_do_probe(struct device *dev, struct resource *ports, int rtc_irq)
 	if (rtc_nvmem_register(cmos_rtc.rtc, &nvmem_cfg))
 		dev_err(dev, "nvmem registration failed\n");
 
+	/*
+	 * Everything has gone well so far, so by default register a handler for
+	 * the ACPI RTC fixed event.
+	 */
+	if (!info)
+		acpi_rtc_event_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" :
@@ -978,6 +1155,9 @@ static void cmos_do_remove(struct device *dev)
 			hpet_unregister_irq_handler(cmos_interrupt);
 	}
 
+	if (!dev_get_platdata(dev))
+		acpi_rtc_event_cleanup();
+
 	cmos->rtc = NULL;
 
 	ports = cmos->iomem;
@@ -1127,9 +1307,6 @@ static void cmos_check_wkalrm(struct device *dev)
 	}
 }
 
-static void cmos_check_acpi_rtc_status(struct device *dev,
-				       unsigned char *rtc_control);
-
 static int __maybe_unused cmos_resume(struct device *dev)
 {
 	struct cmos_rtc	*cmos = dev_get_drvdata(dev);
@@ -1196,174 +1373,16 @@ static SIMPLE_DEV_PM_OPS(cmos_pm_ops, cmos_suspend, cmos_resume);
  * predate even PNPBIOS should set up platform_bus devices.
  */
 
-#ifdef	CONFIG_ACPI
-
-#include <linux/acpi.h>
-
-static u32 rtc_handler(void *context)
-{
-	struct device *dev = context;
-	struct cmos_rtc *cmos = dev_get_drvdata(dev);
-	unsigned char rtc_control = 0;
-	unsigned char rtc_intr;
-	unsigned long flags;
-
-
-	/*
-	 * Always update rtc irq when ACPI is used as RTC Alarm.
-	 * Or else, ACPI SCI is enabled during suspend/resume only,
-	 * update rtc irq in that case.
-	 */
-	if (cmos_use_acpi_alarm())
-		cmos_interrupt(0, (void *)cmos->rtc);
-	else {
-		/* Fix me: can we use cmos_interrupt() here as well? */
-		spin_lock_irqsave(&rtc_lock, flags);
-		if (cmos_rtc.suspend_ctrl)
-			rtc_control = CMOS_READ(RTC_CONTROL);
-		if (rtc_control & RTC_AIE) {
-			cmos_rtc.suspend_ctrl &= ~RTC_AIE;
-			CMOS_WRITE(rtc_control, RTC_CONTROL);
-			rtc_intr = CMOS_READ(RTC_INTR_FLAGS);
-			rtc_update_irq(cmos->rtc, 1, rtc_intr);
-		}
-		spin_unlock_irqrestore(&rtc_lock, flags);
-	}
-
-	pm_wakeup_hard_event(dev);
-	acpi_clear_event(ACPI_EVENT_RTC);
-	acpi_disable_event(ACPI_EVENT_RTC, 0);
-	return ACPI_INTERRUPT_HANDLED;
-}
-
-static inline void rtc_wake_setup(struct device *dev)
-{
-	acpi_install_fixed_event_handler(ACPI_EVENT_RTC, rtc_handler, dev);
-	/*
-	 * After the RTC handler is installed, the Fixed_RTC event should
-	 * be disabled. Only when the RTC alarm is set will it be enabled.
-	 */
-	acpi_clear_event(ACPI_EVENT_RTC);
-	acpi_disable_event(ACPI_EVENT_RTC, 0);
-}
-
-static void rtc_wake_on(struct device *dev)
-{
-	acpi_clear_event(ACPI_EVENT_RTC);
-	acpi_enable_event(ACPI_EVENT_RTC, 0);
-}
-
-static void rtc_wake_off(struct device *dev)
-{
-	acpi_disable_event(ACPI_EVENT_RTC, 0);
-}
-
-#ifdef CONFIG_X86
-/* Enable use_acpi_alarm mode for Intel platforms no earlier than 2015 */
-static void use_acpi_alarm_quirks(void)
-{
-	if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
-		return;
-
-	if (!(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0))
-		return;
-
-	if (!is_hpet_enabled())
-		return;
-
-	if (dmi_get_bios_year() < 2015)
-		return;
-
-	use_acpi_alarm = true;
-}
-#else
-static inline void use_acpi_alarm_quirks(void) { }
-#endif
-
-/* Every ACPI platform has a mc146818 compatible "cmos rtc".  Here we find
- * its device node and pass extra config data.  This helps its driver use
- * capabilities that the now-obsolete mc146818 didn't have, and informs it
- * that this board's RTC is wakeup-capable (per ACPI spec).
- */
-static struct cmos_rtc_board_info acpi_rtc_info;
-
-static void cmos_wake_setup(struct device *dev)
-{
-	if (acpi_disabled)
-		return;
-
-	use_acpi_alarm_quirks();
-
-	rtc_wake_setup(dev);
-	acpi_rtc_info.wake_on = rtc_wake_on;
-	acpi_rtc_info.wake_off = rtc_wake_off;
-
-	/* workaround bug in some ACPI tables */
-	if (acpi_gbl_FADT.month_alarm && !acpi_gbl_FADT.day_alarm) {
-		dev_dbg(dev, "bogus FADT month_alarm (%d)\n",
-			acpi_gbl_FADT.month_alarm);
-		acpi_gbl_FADT.month_alarm = 0;
-	}
-
-	acpi_rtc_info.rtc_day_alarm = acpi_gbl_FADT.day_alarm;
-	acpi_rtc_info.rtc_mon_alarm = acpi_gbl_FADT.month_alarm;
-	acpi_rtc_info.rtc_century = acpi_gbl_FADT.century;
-
-	/* NOTE:  S4_RTC_WAKE is NOT currently useful to Linux */
-	if (acpi_gbl_FADT.flags & ACPI_FADT_S4_RTC_WAKE)
-		dev_info(dev, "RTC can wake from S4\n");
-
-	dev->platform_data = &acpi_rtc_info;
-
-	/* RTC always wakes from S1/S2/S3, and often S4/STD */
-	device_init_wakeup(dev, 1);
-}
-
-static void cmos_check_acpi_rtc_status(struct device *dev,
-				       unsigned char *rtc_control)
-{
-	struct cmos_rtc *cmos = dev_get_drvdata(dev);
-	acpi_event_status rtc_status;
-	acpi_status status;
-
-	if (acpi_gbl_FADT.flags & ACPI_FADT_FIXED_RTC)
-		return;
-
-	status = acpi_get_event_status(ACPI_EVENT_RTC, &rtc_status);
-	if (ACPI_FAILURE(status)) {
-		dev_err(dev, "Could not get RTC status\n");
-	} else if (rtc_status & ACPI_EVENT_FLAG_SET) {
-		unsigned char mask;
-		*rtc_control &= ~RTC_AIE;
-		CMOS_WRITE(*rtc_control, RTC_CONTROL);
-		mask = CMOS_READ(RTC_INTR_FLAGS);
-		rtc_update_irq(cmos->rtc, 1, mask);
-	}
-}
-
-#else
-
-static void cmos_wake_setup(struct device *dev)
-{
-}
-
-static void cmos_check_acpi_rtc_status(struct device *dev,
-				       unsigned char *rtc_control)
-{
-}
-
-#endif
-
 #ifdef	CONFIG_PNP
 
 #include <linux/pnp.h>
 
 static int cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
 {
-	cmos_wake_setup(&pnp->dev);
+	int irq;
 
 	if (pnp_port_start(pnp, 0) == 0x70 && !pnp_irq_valid(pnp, 0)) {
-		unsigned int irq = 0;
+		irq = 0;
 #ifdef CONFIG_X86
 		/* Some machines contain a PNP entry for the RTC, but
 		 * don't define the IRQ. It should always be safe to
@@ -1372,13 +1391,11 @@ static int cmos_pnp_probe(struct pnp_dev *pnp, const struct pnp_device_id *id)
 		if (nr_legacy_irqs())
 			irq = RTC_IRQ;
 #endif
-		return cmos_do_probe(&pnp->dev,
-				pnp_get_resource(pnp, IORESOURCE_IO, 0), irq);
 	} else {
-		return cmos_do_probe(&pnp->dev,
-				pnp_get_resource(pnp, IORESOURCE_IO, 0),
-				pnp_irq(pnp, 0));
+		irq = pnp_irq(pnp, 0);
 	}
+
+	return cmos_do_probe(&pnp->dev, pnp_get_resource(pnp, IORESOURCE_IO, 0), irq);
 }
 
 static void cmos_pnp_remove(struct pnp_dev *pnp)
@@ -1465,7 +1482,6 @@ static int __init cmos_platform_probe(struct platform_device *pdev)
 	int irq;
 
 	cmos_of_init(pdev);
-	cmos_wake_setup(&pdev->dev);
 
 	if (RTC_IOMAPPED)
 		resource = platform_get_resource(pdev, IORESOURCE_IO, 0);