From: Andy Gross <andy.gross@linaro.org>
To: Sricharan R <sricharan@codeaurora.org>
Cc: iivanov@mm-sol.com, devicetree@vger.kernel.org,
linux-arm-msm@vger.kernel.org, galak@codeaurora.org,
linux-kernel@vger.kernel.org, linux-i2c@vger.kernel.org,
agross@codeaurora.org, dmaengine@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [V5,4/6] i2c: qup: Add bam dma capabilities
Date: Fri, 8 Jan 2016 22:38:09 -0600 [thread overview]
Message-ID: <20160109043809.GC4616@hector.attlocal.net> (raw)
In-Reply-To: <1447760727-4897-5-git-send-email-sricharan@codeaurora.org>
On Tue, Nov 17, 2015 at 05:15:25PM +0530, Sricharan R wrote:
> QUP cores can be attached to a BAM module, which acts as a dma engine for the
> QUP core. When DMA with BAM is enabled, the BAM consumer pipe transmitted data
> is written to the output FIFO and the BAM producer pipe received data is read
> from the input FIFO.
>
> With BAM capabilities, qup-i2c core can transfer more than 256 bytes, without a
> 'stop' which is not possible otherwise.
>
> Signed-off-by: Sricharan R <sricharan@codeaurora.org>
> ---
Reviewed-by: Andy Gross <andy.gross@linaro.org>
WARNING: multiple messages have this Message-ID (diff)
From: andy.gross@linaro.org (Andy Gross)
To: linux-arm-kernel@lists.infradead.org
Subject: [V5,4/6] i2c: qup: Add bam dma capabilities
Date: Fri, 8 Jan 2016 22:38:09 -0600 [thread overview]
Message-ID: <20160109043809.GC4616@hector.attlocal.net> (raw)
In-Reply-To: <1447760727-4897-5-git-send-email-sricharan@codeaurora.org>
On Tue, Nov 17, 2015 at 05:15:25PM +0530, Sricharan R wrote:
> QUP cores can be attached to a BAM module, which acts as a dma engine for the
> QUP core. When DMA with BAM is enabled, the BAM consumer pipe transmitted data
> is written to the output FIFO and the BAM producer pipe received data is read
> from the input FIFO.
>
> With BAM capabilities, qup-i2c core can transfer more than 256 bytes, without a
> 'stop' which is not possible otherwise.
>
> Signed-off-by: Sricharan R <sricharan@codeaurora.org>
> ---
Reviewed-by: Andy Gross <andy.gross@linaro.org>
next prev parent reply other threads:[~2016-01-09 4:38 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-17 11:45 [PATCH V5 0/6] i2c: qup: Add support for v2 tags and bam dma Sricharan R
2015-11-17 11:45 ` Sricharan R
2015-11-17 11:45 ` [PATCH V5 1/6] i2c: qup: Change qup_wait_writeready function to use for all timeouts Sricharan R
2015-11-17 11:45 ` Sricharan R
[not found] ` <1447760727-4897-2-git-send-email-sricharan-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2016-01-05 3:19 ` [V5, " Andy Gross
2016-01-05 3:19 ` Andy Gross
2016-01-05 3:19 ` Andy Gross
2015-11-17 11:45 ` [PATCH V5 2/6] i2c: qup: Add V2 tags support Sricharan R
2015-11-17 11:45 ` Sricharan R
2015-11-17 11:45 ` [PATCH V5 3/6] i2c: qup: Transfer each i2c_msg in i2c_msgs without a stop bit Sricharan R
2015-11-17 11:45 ` Sricharan R
2016-01-09 4:36 ` [V5, " Andy Gross
2016-01-09 4:36 ` Andy Gross
2015-11-17 11:45 ` [PATCH V5 4/6] i2c: qup: Add bam dma capabilities Sricharan R
2015-11-17 11:45 ` Sricharan R
2016-01-09 4:38 ` Andy Gross [this message]
2016-01-09 4:38 ` [V5,4/6] " Andy Gross
2015-11-17 11:45 ` [PATCH V5 5/6] dts: msm8974: Add blsp2_bam dma node Sricharan R
2015-11-17 11:45 ` Sricharan R
2016-01-09 4:39 ` [V5,5/6] " Andy Gross
2016-01-09 4:39 ` Andy Gross
2015-11-17 11:45 ` [PATCH V5 6/6] dts: msm8974: Add dma channels for blsp2_i2c1 node Sricharan R
2015-11-17 11:45 ` Sricharan R
2016-01-09 4:40 ` [V5,6/6] " Andy Gross
2016-01-09 4:40 ` Andy Gross
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