linux-kernel - Re: [V5,4/6] i2c: qup: Add bam dma capabilities

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Message-ID: <20160109043809.GC4616@hector.attlocal.net>
Date:	Fri, 8 Jan 2016 22:38:09 -0600
From:	Andy Gross <andy.gross@...aro.org>
To:	Sricharan R <sricharan@...eaurora.org>
Cc:	iivanov@...sol.com, devicetree@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, galak@...eaurora.org,
	linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
	agross@...eaurora.org, dmaengine@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [V5,4/6] i2c: qup: Add bam dma capabilities

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@...eaurora.org>
> ---

Reviewed-by: Andy Gross <andy.gross@...aro.org>