From: Wolfram Sang <wsa@the-dreams.de>
To: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: linux-sh@vger.kernel.org, linux-i2c@vger.kernel.org,
Magnus Damm <magnus.damm@gmail.com>,
Simon Horman <horms@verge.net.au>,
linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org
Subject: Re: [PATCH V2 5/5] i2c: riic: add driver
Date: Fri, 20 Dec 2013 16:47:46 +0100 [thread overview]
Message-ID: <20131220154746.GA9017@katana> (raw)
In-Reply-To: <2069590.SA4Ef3s3BZ@avalon>
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> disable interrupts at runtime and use that as a state machine, while I was
> wondering whether it wouldn't be simpler to keep all interrupts enabled at all
> time and handle the synchronization explicitly.
If I do this, I'll get another "spurious" interrupt telling me the transmit
register is empty again, even after I wrote the last byte. I don't like
this.
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From: Wolfram Sang <wsa@the-dreams.de>
To: linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH V2 5/5] i2c: riic: add driver
Date: Fri, 20 Dec 2013 15:47:46 +0000 [thread overview]
Message-ID: <20131220154746.GA9017@katana> (raw)
In-Reply-To: <2069590.SA4Ef3s3BZ@avalon>
[-- Attachment #1: Type: text/plain, Size: 376 bytes --]
> disable interrupts at runtime and use that as a state machine, while I was
> wondering whether it wouldn't be simpler to keep all interrupts enabled at all
> time and handle the synchronization explicitly.
If I do this, I'll get another "spurious" interrupt telling me the transmit
register is empty again, even after I wrote the last byte. I don't like
this.
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WARNING: multiple messages have this Message-ID (diff)
From: wsa@the-dreams.de (Wolfram Sang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V2 5/5] i2c: riic: add driver
Date: Fri, 20 Dec 2013 16:47:46 +0100 [thread overview]
Message-ID: <20131220154746.GA9017@katana> (raw)
In-Reply-To: <2069590.SA4Ef3s3BZ@avalon>
> disable interrupts at runtime and use that as a state machine, while I was
> wondering whether it wouldn't be simpler to keep all interrupts enabled at all
> time and handle the synchronization explicitly.
If I do this, I'll get another "spurious" interrupt telling me the transmit
register is empty again, even after I wrote the last byte. I don't like
this.
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next prev parent reply other threads:[~2013-12-20 15:47 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-18 21:31 [PATCH V2 0/5] arm: shmobile: r7s72100: add native i2c support Wolfram Sang
2013-12-18 21:31 ` Wolfram Sang
2013-12-18 21:31 ` Wolfram Sang
2013-12-18 21:31 ` [PATCH V2 2/5] arm: shmobile: r7s72100: add i2c clocks Wolfram Sang
2013-12-18 21:31 ` Wolfram Sang
2013-12-18 21:31 ` Wolfram Sang
[not found] ` <1387402321-21866-3-git-send-email-wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
2013-12-24 2:48 ` Simon Horman
2013-12-24 2:48 ` Simon Horman
2013-12-24 2:48 ` Simon Horman
[not found] ` <20131224024855.GC22401-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org>
2013-12-26 21:20 ` Geert Uytterhoeven
2013-12-26 21:20 ` Geert Uytterhoeven
2013-12-26 21:20 ` Geert Uytterhoeven
2013-12-26 21:25 ` Wolfram Sang
2013-12-26 21:25 ` Wolfram Sang
2013-12-26 21:25 ` Wolfram Sang
2013-12-26 21:34 ` Geert Uytterhoeven
2013-12-26 21:34 ` Geert Uytterhoeven
2013-12-26 21:34 ` Geert Uytterhoeven
[not found] ` <CAMuHMdXF6WmS_j4pC1U5jL3SK-ck7N=EA+-45duXdRZP1cOJkw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-12-26 21:51 ` Geert Uytterhoeven
2013-12-26 21:51 ` Geert Uytterhoeven
2013-12-26 21:51 ` Geert Uytterhoeven
[not found] ` <CAMuHMdXP4DAF1_DPtNfwCyP8WHFU03=zgM7i8FW9n6tcJpAHHQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-12-27 2:01 ` Simon Horman
2013-12-27 2:01 ` Simon Horman
2013-12-27 2:01 ` Simon Horman
[not found] ` <1387402321-21866-1-git-send-email-wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
2013-12-18 21:31 ` [PATCH V2 1/5] pinctrl: r7s72100: add riic groups Wolfram Sang
2013-12-18 21:31 ` Wolfram Sang
2013-12-18 21:31 ` Wolfram Sang
[not found] ` <1387402321-21866-2-git-send-email-wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
2013-12-18 21:49 ` Wolfram Sang
2013-12-18 21:49 ` Wolfram Sang
2013-12-18 21:49 ` Wolfram Sang
2013-12-18 21:31 ` [PATCH V2 3/5] arm: shmobile: r7s72100: add nodes for i2c controllers to dtsi Wolfram Sang
2013-12-18 21:31 ` Wolfram Sang
2013-12-18 21:31 ` Wolfram Sang
[not found] ` <1387402321-21866-4-git-send-email-wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
2013-12-27 4:27 ` Wolfram Sang
2013-12-27 4:27 ` Wolfram Sang
2013-12-27 4:27 ` Wolfram Sang
2014-01-06 5:22 ` Simon Horman
2014-01-06 5:22 ` Simon Horman
2014-01-06 5:22 ` Simon Horman
2013-12-18 21:32 ` [PATCH V2 4/5] arm: shmobile: genmai: adapt dts to use native i2c driver Wolfram Sang
2013-12-18 21:32 ` Wolfram Sang
2013-12-18 21:32 ` Wolfram Sang
2013-12-18 21:32 ` [PATCH V2 5/5] i2c: riic: add driver Wolfram Sang
2013-12-18 21:32 ` Wolfram Sang
2013-12-18 21:32 ` Wolfram Sang
[not found] ` <1387402321-21866-6-git-send-email-wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
2013-12-19 0:01 ` Laurent Pinchart
2013-12-19 0:01 ` Laurent Pinchart
2013-12-19 0:01 ` Laurent Pinchart
2013-12-19 12:06 ` Wolfram Sang
2013-12-19 12:06 ` Wolfram Sang
2013-12-19 12:06 ` Wolfram Sang
2013-12-19 15:33 ` Laurent Pinchart
2013-12-19 15:33 ` Laurent Pinchart
2013-12-19 15:33 ` Laurent Pinchart
2013-12-20 15:47 ` Wolfram Sang [this message]
2013-12-20 15:47 ` Wolfram Sang
2013-12-20 15:47 ` Wolfram Sang
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