rtc: rtc-m48t59: rtc-m48t59.0: IRQ index 0 not found

Hello

On my SPARC sunblade 100, I got this:

[   13.613727] rtc-m48t59 rtc-m48t59.0: IRQ index 0 not found
[   13.805777] rtc-m48t59 rtc-m48t59.0: registered as rtc0
[   14.385092] rtc-m48t59 rtc-m48t59.0: setting system clock to 2021-03-01T05:34:33 UTC (1614576873)

The IRQ index 0 message is found after 5.5

Testing rtc via hwclock give:
hwclock: ioctl(3, RTC_UIE_ON, 0) to /dev/rtc0 failed: Input/output error
But this hwclock behavior is present also on earlier kernel (tested 4.9.260, 4.19.179 and 4.14.224).

Does this Input/output error is normal ? (I think no)

Regards

Hello,

This is due to 7723f4c5ecdb8d832f049f8483beb0d1081cedf6

Can you try that?

From 55cc33fab5ac9f7e2a97aa7c564e8b35355886d5 Mon Sep 17 00:00:00 2001
From: Alexandre Belloni <[email protected]>
Date: Thu, 11 Mar 2021 09:48:09 +0100
Subject: [PATCH] rtc: m48t59: use platform_get_irq_optional

The IRQ is optional, avoid the error message by using platform_get_irq_optional.

---
 drivers/rtc/rtc-m48t59.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 1d2e99a70fce..f0f6b9b6daec 100644
@@ -421,7 +421,7 @@ static int m48t59_rtc_probe(struct platform_device *pdev)
 	/* Try to get irq number. We also can work in
 	 * the mode without IRQ.
 	 */
-	m48t59->irq = platform_get_irq(pdev, 0);
+	m48t59->irq = platform_get_irq_optional(pdev, 0);
 	if (m48t59->irq <= 0)
 		m48t59->irq = NO_IRQ;
 

2.29.2

-- 
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com