From: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>
To: Ben Dooks <ben-i2c-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
Cc: Haojian Zhuang
<haojian.zhuang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
eric.y.miao-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
Haojian Zhuang
<haojian.zhuang-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>
Subject: Re: [PATCH 1/3] i2c: append hardware lock with bus lock
Date: Mon, 2 May 2011 11:46:16 +0200 [thread overview]
Message-ID: <20110502114616.7813da79@endymion.delvare> (raw)
In-Reply-To: <20110502092734.GV15795-SMNkleLxa3Z6Wcw2j4pizdi2O/JbrIOy@public.gmane.org>
On Mon, 2 May 2011 10:27:34 +0100, Ben Dooks wrote:
> On Thu, Apr 28, 2011 at 11:15:44PM +0800, Haojian Zhuang wrote:
> > Both AP and CP are contained in Marvell PXA910 silicon. These two ARM
> > cores are sharing one pair of I2C pins.
> >
> > In order to keep I2C transaction operated with atomic, hardware lock
> > (RIPC) is required. Because of this, bus lock in AP side can't afford
> > this requirement. Now hardware lock is appended.
> >
> > Signed-off-by: Haojian Zhuang <haojian.zhuang-eYqpPyKDWXRBDgjK7y7TUQ@public.gmane.org>
> > Cc: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
> > Cc: Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>
>
> Right, this looks like a reasonable explanation of what is going on here
> and if Jean is happy with the core changes I'll look at where the driver
> change can go.
Yes I am!
Let me know if you want me to take the core change in my tree or if you
prefer to have it in yours to avoid a dependency.
--
Jean Delvare
next prev parent reply other threads:[~2011-05-02 9:46 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <2011042801>
2011-04-28 4:02 ` [PATCH 1/3] i2c: append hardware lock with bus lock Haojian Zhuang
[not found] ` <1303963358-4652-1-git-send-email-haojian.zhuang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-04-28 8:22 ` Jean Delvare
[not found] ` <20110428102212.2d8d607c-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-04-28 8:36 ` Eric Miao
[not found] ` <BANLkTin6jguQue_0Y74jGPnmhCcvWLBjHg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2011-04-28 14:16 ` Jean Delvare
[not found] ` <20110428161625.5eaacb85-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-04-28 14:37 ` Russell King - ARM Linux
2011-04-28 14:48 ` Haojian Zhuang
2011-04-28 14:19 ` Haojian Zhuang
2011-04-28 4:02 ` [PATCH 2/3] i2c: pxa: support hardware lock Haojian Zhuang
2011-04-28 4:02 ` [PATCH 3/3] ARM: mmp: add hardware lock support in PXA910 Haojian Zhuang
2011-04-28 15:15 ` [PATCH 1/3] i2c: append hardware lock with bus lock Haojian Zhuang
[not found] ` <1304003746-12127-1-git-send-email-haojian.zhuang-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2011-05-02 9:27 ` Ben Dooks
[not found] ` <20110502092734.GV15795-SMNkleLxa3Z6Wcw2j4pizdi2O/JbrIOy@public.gmane.org>
2011-05-02 9:46 ` Jean Delvare [this message]
[not found] ` <20110502114616.7813da79-R0o5gVi9kd7kN2dkZ6Wm7A@public.gmane.org>
2011-05-10 23:08 ` Ben Dooks
2011-04-28 15:15 ` [PATCH 2/3] i2c: pxa: support hardware lock Haojian Zhuang
2011-04-28 15:15 ` [PATCH 3/3] ARM: mmp: add hardware lock support in PXA910 Haojian Zhuang
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