[PATCH 08/12] rtc: ds1511: let the core know when alarm are not supported

[alexandre.belloni@bootlin.com]

From: Alexandre Belloni <alexandre.belloni@bootlin.com>

Instead of failing function calls, let the core know alarms are not
supported so it can fail early and avoid unnecessary calls.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
 drivers/rtc/rtc-ds1511.c | 24 +++++++++---------------
 1 file changed, 9 insertions(+), 15 deletions(-)

diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c
index b0dfdda2c8fc..c81f464e6a50 100644
--- a/drivers/rtc/rtc-ds1511.c
+++ b/drivers/rtc/rtc-ds1511.c
@@ -188,9 +188,6 @@ static int ds1511_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 	struct rtc_plat_data *pdata = dev_get_drvdata(dev);
 	unsigned long flags;
 
-	if (pdata->irq <= 0)
-		return -EINVAL;
-
 	pdata->alrm_mday = alrm->time.tm_mday;
 	pdata->alrm_hour = alrm->time.tm_hour;
 	pdata->alrm_min = alrm->time.tm_min;
@@ -219,9 +216,6 @@ static int ds1511_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
 {
 	struct rtc_plat_data *pdata = dev_get_drvdata(dev);
 
-	if (pdata->irq <= 0)
-		return -EINVAL;
-
 	alrm->time.tm_mday = pdata->alrm_mday < 0 ? 0 : pdata->alrm_mday;
 	alrm->time.tm_hour = pdata->alrm_hour < 0 ? 0 : pdata->alrm_hour;
 	alrm->time.tm_min = pdata->alrm_min < 0 ? 0 : pdata->alrm_min;
@@ -253,9 +247,6 @@ static int ds1511_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
 	struct rtc_plat_data *pdata = dev_get_drvdata(dev);
 	unsigned long flags;
 
-	if (pdata->irq <= 0)
-		return -EINVAL;
-
 	spin_lock_irqsave(&pdata->lock, flags);
 	ds1511_rtc_alarm_enable(enabled);
 	spin_unlock_irqrestore(&pdata->lock, flags);
@@ -349,12 +340,6 @@ static int ds1511_rtc_probe(struct platform_device *pdev)
 
 	pdata->rtc->ops = &ds1511_rtc_ops;
 
-	ret = devm_rtc_register_device(pdata->rtc);
-	if (ret)
-		return ret;
-
-	devm_rtc_nvmem_register(pdata->rtc, &ds1511_nvmem_cfg);
-
 	/*
 	 * if the platform has an interrupt in mind for this device,
 	 * then by all means, set it
@@ -369,6 +354,15 @@ static int ds1511_rtc_probe(struct platform_device *pdev)
 		}
 	}
 
+	if (pdata->irq == 0)
+		clear_bit(RTC_FEATURE_ALARM, pdata->rtc->features);
+
+	ret = devm_rtc_register_device(pdata->rtc);
+	if (ret)
+		return ret;
+
+	devm_rtc_nvmem_register(pdata->rtc, &ds1511_nvmem_cfg);
+
 	return 0;
 }
 
-- 
2.43.0