From: Ben Dooks <ben-linux@fluff.org>
To: Hebbar <gururajakr@sanyo.co.in>
Cc: linux-kernel@vger.kernel.org
Subject: Re: need help to enable ARM AMBA PL031 RTC
Date: Tue, 15 Jul 2008 11:47:41 +0100 [thread overview]
Message-ID: <20080715104741.GF24620@fluff.org.uk> (raw)
In-Reply-To: <18462244.post@talk.nabble.com>
On Tue, Jul 15, 2008 at 03:43:14AM -0700, Hebbar wrote:
>
> I all,
>
> I am working on customized arm versatile board and i am trying to use ARM
> AMBA PL031 RTC.
linux-arm-kernel@lists.arm.linux.org.uk is the right place to
discuss this, although I belive it is moderated for non-subscribers.
> i enabled CONFIG_RTC_DRV_PL031=y
>
> But the date never changes or updates.
>
> / # cat /sys/class/rtc/rtc0/time
> 00:00:00
>
> When i went through the Ref Manual of ARM AMBA PL031 RTC i found that we
> need to enable or set high to RTC START bit (bit 0) in RTC Control Register
> ( 0x0C ).
>
> but in rtc-pl031.c, RTC_START is no where set in RTC CONTROL Register.
>
> I think we need to enable it in rtc_probe func after rtc_device_register
> returns success.
>
> #define RTC_CR_MIE (1 << 0)
>
> __raw_writel(RTC_CR_MIE, ldata->base + RTC_CR);
>
> Kindly Comment.
>
> Regards
> Gururaja
>
>
> --
> View this message in context: http://www.nabble.com/need-help-to-enable-ARM-AMBA-PL031-RTC-tp18462244p18462244.html
> Sent from the linux-kernel mailing list archive at Nabble.com.
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
--
Ben (ben@fluff.org, http://www.fluff.org/)
'a smiley only costs 4 bytes'
prev parent reply other threads:[~2008-07-15 10:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-15 10:43 Hebbar
2008-07-15 10:47 ` Ben Dooks [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20080715104741.GF24620@fluff.org.uk \
--to=ben-linux@fluff.org \
--cc=gururajakr@sanyo.co.in \
--cc=linux-kernel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®