linux-kernel - [PATCH] rtc: tps65910: allow using RTC without alarm interrupt

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Message-Id: <20191109154652.7419-1-andrej.skvortzov@gmail.com>
Date:   Sat,  9 Nov 2019 18:46:52 +0300
From:   Andrey Skvortsov <andrej.skvortzov@...il.com>
To:     Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Andrey Skvortsov <andrej.skvortzov@...il.com>
Subject: [PATCH] rtc: tps65910: allow using RTC without alarm interrupt

Signed-off-by: Andrey Skvortsov <andrej.skvortzov@...il.com>
---
 drivers/rtc/rtc-tps65910.c | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c
index 2c0467a9e717..aa3a001ef413 100644
--- a/drivers/rtc/rtc-tps65910.c
+++ b/drivers/rtc/rtc-tps65910.c
@@ -361,6 +361,13 @@ static const struct rtc_class_ops tps65910_rtc_ops = {
 	.set_offset	= tps65910_set_offset,
 };
 
+static const struct rtc_class_ops tps65910_rtc_ops_noirq = {
+	.read_time	= tps65910_rtc_read_time,
+	.set_time	= tps65910_rtc_set_time,
+	.read_offset	= tps65910_read_offset,
+	.set_offset	= tps65910_set_offset,
+};
+
 static int tps65910_rtc_probe(struct platform_device *pdev)
 {
 	struct tps65910 *tps65910 = NULL;
@@ -415,13 +422,17 @@ static int tps65910_rtc_probe(struct platform_device *pdev)
 		tps65910_rtc_interrupt, IRQF_TRIGGER_LOW,
 		dev_name(&pdev->dev), &pdev->dev);
 	if (ret < 0) {
-		dev_err(&pdev->dev, "IRQ is not free.\n");
-		return ret;
+		dev_err(&pdev->dev, "request IRQ:%d failed, err = %d\n",
+			 irq, ret);
+		irq = -1;
 	}
 	tps_rtc->irq = irq;
-	device_set_wakeup_capable(&pdev->dev, 1);
+	if (irq != -1) {
+		device_set_wakeup_capable(&pdev->dev, 1);
+		tps_rtc->rtc->ops = &tps65910_rtc_ops;
+	} else
+		tps_rtc->rtc->ops = &tps65910_rtc_ops_noirq;
 
-	tps_rtc->rtc->ops = &tps65910_rtc_ops;
 	tps_rtc->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
 	tps_rtc->rtc->range_max = RTC_TIMESTAMP_END_2099;
 
-- 
2.20.1