ls1x RTC fix

0001-drivers-rtc-ls1x-Prevent-RTC-irq-block-whole-system.patch

From 20d76cab4ab707325b42629ecebe34b9b5cb603a Mon Sep 17 00:00:00 2001
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Date: Mon, 24 Dec 2018 11:26:48 +0800
Subject: [PATCH] drivers/rtc/ls1x: Prevent RTC irq block whole system

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 drivers/rtc/rtc-ls1x-toy.c |  5 +++++
 drivers/rtc/rtc-ls1x.c     | 11 +++++++++++
 2 files changed, 16 insertions(+)

diff --git a/drivers/rtc/rtc-ls1x-toy.c b/drivers/rtc/rtc-ls1x-toy.c
index 274085ef..1bb2bb99 100644
--- a/drivers/rtc/rtc-ls1x-toy.c
+++ b/drivers/rtc/rtc-ls1x-toy.c
@@ -173,6 +173,11 @@ static int ls1x_rtc_probe(struct platform_device *pdev)
 	while (readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS)
 		usleep_range(1000, 3000);
 
+	/* Clear TOYMATCHs to prevent irq block whole system */
+	writel(0x0, SYS_TOYMATCH0);
+	writel(0x0, SYS_TOYMATCH1);
+	writel(0x0, SYS_TOYMATCH2);
+
 	rtcdev = devm_rtc_device_register(&pdev->dev, "ls1x-toy",
 					&ls1x_rtc_ops , THIS_MODULE);
 	if (IS_ERR(rtcdev)) {
diff --git a/drivers/rtc/rtc-ls1x.c b/drivers/rtc/rtc-ls1x.c
index ca0b0224..31ae8843 100644
--- a/drivers/rtc/rtc-ls1x.c
+++ b/drivers/rtc/rtc-ls1x.c
@@ -189,6 +189,8 @@ static irqreturn_t ls1x_rtc0_handler(int irq, void *rtc)
 	events |= RTC_IRQF | RTC_AF;
 	rtc_update_irq(rtc, 1, events);
 
+	writel(0x0, SYS_RTCMATCH0);
+
 	return IRQ_HANDLED;
 }
 
@@ -199,6 +201,8 @@ static irqreturn_t ls1x_rtc1_handler(int irq, void *rtc)
 	events |= RTC_IRQF | RTC_AF;
 	rtc_update_irq(rtc, 1, events);
 
+	writel(0x0, SYS_RTCMATCH1);
+
 	return IRQ_HANDLED;
 }
 
@@ -209,6 +213,8 @@ static irqreturn_t ls1x_rtc2_handler(int irq, void *rtc)
 	events |= RTC_IRQF | RTC_AF;
 	rtc_update_irq(rtc, 1, events);
 
+	writel(0x0, SYS_RTCMATCH2);
+
 	return IRQ_HANDLED;
 }
 
@@ -268,6 +274,11 @@ static int ls1x_rtc_probe(struct platform_device *pdev)
 		goto err;
 	}
 
+	/* Clear RTCMATCHs to prevent irq block whole system */
+	writel(0x0, SYS_RTCMATCH0);
+	writel(0x0, SYS_RTCMATCH1);
+	writel(0x0, SYS_RTCMATCH2);
+
 	platform_set_drvdata(pdev, rtcdev);
 
 	for (i = 0; i < 4; i++) {
-- 
2.19.2