* [PATCH] rtc: goldfish: Enable interrupt in set_alarm() when necessary
@ 2020-06-20 12:04 Huacai Chen
2020-07-03 3:00 ` Huacai Chen
2020-07-16 9:16 ` Alexandre Belloni
0 siblings, 2 replies; 5+ messages in thread
From: Huacai Chen @ 2020-06-20 12:04 UTC (permalink / raw)
To: Miodrag Dinic, Alessandro Zummo, Alexandre Belloni
Cc: linux-rtc, Fuxin Zhang, Huacai Chen, Jiaxun Yang, Huacai Chen
When use goldfish rtc, the "hwclock" command fails with "select() to
/dev/rtc to wait for clock tick timed out". This is because "hwclock"
need the set_alarm() hook to enable interrupt when alrm->enabled is
true. This operation is missing in goldfish rtc (but other rtc drivers,
such as cmos rtc, enable interrupt here), so add it.
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
drivers/rtc/rtc-goldfish.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/rtc/rtc-goldfish.c b/drivers/rtc/rtc-goldfish.c
index 1a3420e..d5083b0 100644
--- a/drivers/rtc/rtc-goldfish.c
+++ b/drivers/rtc/rtc-goldfish.c
@@ -73,6 +73,7 @@ static int goldfish_rtc_set_alarm(struct device *dev,
rtc_alarm64 = rtc_tm_to_time64(&alrm->time) * NSEC_PER_SEC;
writel((rtc_alarm64 >> 32), base + TIMER_ALARM_HIGH);
writel(rtc_alarm64, base + TIMER_ALARM_LOW);
+ writel(1, base + TIMER_IRQ_ENABLED);
} else {
/*
* if this function was called with enabled=0
--
2.7.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] rtc: goldfish: Enable interrupt in set_alarm() when necessary
2020-06-20 12:04 [PATCH] rtc: goldfish: Enable interrupt in set_alarm() when necessary Huacai Chen
@ 2020-07-03 3:00 ` Huacai Chen
2020-07-09 9:39 ` Huacai Chen
2020-07-16 9:16 ` Alexandre Belloni
1 sibling, 1 reply; 5+ messages in thread
From: Huacai Chen @ 2020-07-03 3:00 UTC (permalink / raw)
To: Miodrag Dinic, Alessandro Zummo, Alexandre Belloni
Cc: linux-rtc, Fuxin Zhang, Jiaxun Yang
Ping?
On Sat, Jun 20, 2020 at 8:03 PM Huacai Chen <chenhc@lemote.com> wrote:
>
> When use goldfish rtc, the "hwclock" command fails with "select() to
> /dev/rtc to wait for clock tick timed out". This is because "hwclock"
> need the set_alarm() hook to enable interrupt when alrm->enabled is
> true. This operation is missing in goldfish rtc (but other rtc drivers,
> such as cmos rtc, enable interrupt here), so add it.
>
> Signed-off-by: Huacai Chen <chenhc@lemote.com>
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> ---
> drivers/rtc/rtc-goldfish.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/rtc/rtc-goldfish.c b/drivers/rtc/rtc-goldfish.c
> index 1a3420e..d5083b0 100644
> --- a/drivers/rtc/rtc-goldfish.c
> +++ b/drivers/rtc/rtc-goldfish.c
> @@ -73,6 +73,7 @@ static int goldfish_rtc_set_alarm(struct device *dev,
> rtc_alarm64 = rtc_tm_to_time64(&alrm->time) * NSEC_PER_SEC;
> writel((rtc_alarm64 >> 32), base + TIMER_ALARM_HIGH);
> writel(rtc_alarm64, base + TIMER_ALARM_LOW);
> + writel(1, base + TIMER_IRQ_ENABLED);
> } else {
> /*
> * if this function was called with enabled=0
> --
> 2.7.0
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] rtc: goldfish: Enable interrupt in set_alarm() when necessary
2020-07-03 3:00 ` Huacai Chen
@ 2020-07-09 9:39 ` Huacai Chen
2020-07-09 10:30 ` Miodrag Dinic
0 siblings, 1 reply; 5+ messages in thread
From: Huacai Chen @ 2020-07-09 9:39 UTC (permalink / raw)
To: Alessandro Zummo, Alexandre Belloni, miodrag.dinic
Cc: linux-rtc, Fuxin Zhang, Jiaxun Yang
Hi, Midorag,
Maybe miodrag.dinic@syrmia.com is your new email address? Please
review this patch.
And Alessandro, Alexandre, could you please help to review this patch?
Huacai
On Fri, Jul 3, 2020 at 11:00 AM Huacai Chen <chenhuacai@gmail.com> wrote:
>
> Ping?
>
> On Sat, Jun 20, 2020 at 8:03 PM Huacai Chen <chenhc@lemote.com> wrote:
> >
> > When use goldfish rtc, the "hwclock" command fails with "select() to
> > /dev/rtc to wait for clock tick timed out". This is because "hwclock"
> > need the set_alarm() hook to enable interrupt when alrm->enabled is
> > true. This operation is missing in goldfish rtc (but other rtc drivers,
> > such as cmos rtc, enable interrupt here), so add it.
> >
> > Signed-off-by: Huacai Chen <chenhc@lemote.com>
> > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > ---
> > drivers/rtc/rtc-goldfish.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/rtc/rtc-goldfish.c b/drivers/rtc/rtc-goldfish.c
> > index 1a3420e..d5083b0 100644
> > --- a/drivers/rtc/rtc-goldfish.c
> > +++ b/drivers/rtc/rtc-goldfish.c
> > @@ -73,6 +73,7 @@ static int goldfish_rtc_set_alarm(struct device *dev,
> > rtc_alarm64 = rtc_tm_to_time64(&alrm->time) * NSEC_PER_SEC;
> > writel((rtc_alarm64 >> 32), base + TIMER_ALARM_HIGH);
> > writel(rtc_alarm64, base + TIMER_ALARM_LOW);
> > + writel(1, base + TIMER_IRQ_ENABLED);
> > } else {
> > /*
> > * if this function was called with enabled=0
> > --
> > 2.7.0
> >
^ permalink raw reply [flat|nested] 5+ messages in thread
* RE: [PATCH] rtc: goldfish: Enable interrupt in set_alarm() when necessary
2020-07-09 9:39 ` Huacai Chen
@ 2020-07-09 10:30 ` Miodrag Dinic
0 siblings, 0 replies; 5+ messages in thread
From: Miodrag Dinic @ 2020-07-09 10:30 UTC (permalink / raw)
To: Huacai Chen, Alessandro Zummo, Alexandre Belloni
Cc: linux-rtc, Fuxin Zhang, Jiaxun Yang, Aleksandar Markovic,
Petar Jovanovic
Hi Huacai,
Yes, this is my new address. However I haven't been involved in kernel/QEMU community for a while now.
The patch itself looks OK to me, if you made sure the RTC device emulation on the QEMU side is now also inspecting the TIMER_IRQ_ENABLED setting.
OK I see now that you have committed upstream to QEMU the Goldfish RTC device, good job with that.
https://github.com/qemu/qemu/blame/971b2a1e5b1a8cc8f597ac5d7016908f9fa880de/hw/rtc/goldfish_rtc.c
You can add my "reviewed-by".
Glad to see that the "goldfish" project is still alive out there.
Kind regards,
Miodrag
-----Original Message-----
From: Huacai Chen <chenhuacai@gmail.com>
Sent: Thursday, July 9, 2020 11:40 AM
To: Alessandro Zummo <a.zummo@towertech.it>; Alexandre Belloni <alexandre.belloni@bootlin.com>; Miodrag Dinic <Miodrag.Dinic@syrmia.com>
Cc: linux-rtc@vger.kernel.org; Fuxin Zhang <zhangfx@lemote.com>; Jiaxun Yang <jiaxun.yang@flygoat.com>
Subject: Re: [PATCH] rtc: goldfish: Enable interrupt in set_alarm() when necessary
Hi, Midorag,
Maybe miodrag.dinic@syrmia.com is your new email address? Please review this patch.
And Alessandro, Alexandre, could you please help to review this patch?
Huacai
On Fri, Jul 3, 2020 at 11:00 AM Huacai Chen <chenhuacai@gmail.com> wrote:
>
> Ping?
>
> On Sat, Jun 20, 2020 at 8:03 PM Huacai Chen <chenhc@lemote.com> wrote:
> >
> > When use goldfish rtc, the "hwclock" command fails with "select() to
> > /dev/rtc to wait for clock tick timed out". This is because "hwclock"
> > need the set_alarm() hook to enable interrupt when alrm->enabled is
> > true. This operation is missing in goldfish rtc (but other rtc
> > drivers, such as cmos rtc, enable interrupt here), so add it.
> >
> > Signed-off-by: Huacai Chen <chenhc@lemote.com>
> > Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> > ---
> > drivers/rtc/rtc-goldfish.c | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/rtc/rtc-goldfish.c b/drivers/rtc/rtc-goldfish.c
> > index 1a3420e..d5083b0 100644
> > --- a/drivers/rtc/rtc-goldfish.c
> > +++ b/drivers/rtc/rtc-goldfish.c
> > @@ -73,6 +73,7 @@ static int goldfish_rtc_set_alarm(struct device *dev,
> > rtc_alarm64 = rtc_tm_to_time64(&alrm->time) * NSEC_PER_SEC;
> > writel((rtc_alarm64 >> 32), base + TIMER_ALARM_HIGH);
> > writel(rtc_alarm64, base + TIMER_ALARM_LOW);
> > + writel(1, base + TIMER_IRQ_ENABLED);
> > } else {
> > /*
> > * if this function was called with enabled=0
> > --
> > 2.7.0
> >
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] rtc: goldfish: Enable interrupt in set_alarm() when necessary
2020-06-20 12:04 [PATCH] rtc: goldfish: Enable interrupt in set_alarm() when necessary Huacai Chen
2020-07-03 3:00 ` Huacai Chen
@ 2020-07-16 9:16 ` Alexandre Belloni
1 sibling, 0 replies; 5+ messages in thread
From: Alexandre Belloni @ 2020-07-16 9:16 UTC (permalink / raw)
To: Huacai Chen, Miodrag Dinic, Alessandro Zummo
Cc: Alexandre Belloni, Huacai Chen, linux-rtc, Jiaxun Yang, Fuxin Zhang
On Sat, 20 Jun 2020 20:04:43 +0800, Huacai Chen wrote:
> When use goldfish rtc, the "hwclock" command fails with "select() to
> /dev/rtc to wait for clock tick timed out". This is because "hwclock"
> need the set_alarm() hook to enable interrupt when alrm->enabled is
> true. This operation is missing in goldfish rtc (but other rtc drivers,
> such as cmos rtc, enable interrupt here), so add it.
Applied, thanks!
[1/1] rtc: goldfish: Enable interrupt in set_alarm() when necessary
commit: 22f8d5a1bf230cf8567a4121fc3789babb46336d
Best regards,
--
Alexandre Belloni <alexandre.belloni@bootlin.com>
^ permalink raw reply [flat|nested] 5+ messages in thread
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2020-06-20 12:04 [PATCH] rtc: goldfish: Enable interrupt in set_alarm() when necessary Huacai Chen
2020-07-03 3:00 ` Huacai Chen
2020-07-09 9:39 ` Huacai Chen
2020-07-09 10:30 ` Miodrag Dinic
2020-07-16 9:16 ` Alexandre Belloni
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