Hello, On 10/03/2021 10:53:34+0100, Corentin Labbe wrote: > 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) This is due to 7723f4c5ecdb8d832f049f8483beb0d1081cedf6 Can you try that? >From 55cc33fab5ac9f7e2a97aa7c564e8b35355886d5 Mon Sep 17 00:00:00 2001 From: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> 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. Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx> --- drivers/rtc/rtc-m48t59.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/rtc/rtc-m48t59.c b/drivers/rtc/rtc-m48t59.c index 1d2e99a70fce..f0f6b9b6daec 100644 --- a/drivers/rtc/rtc-m48t59.c +++ b/drivers/rtc/rtc-m48t59.c @@ -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
