From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andy Gross Subject: Re: [V5,4/6] i2c: qup: Add bam dma capabilities Date: Fri, 8 Jan 2016 22:38:09 -0600 Message-ID: <20160109043809.GC4616@hector.attlocal.net> References: <1447760727-4897-5-git-send-email-sricharan@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <1447760727-4897-5-git-send-email-sricharan@codeaurora.org> Sender: linux-i2c-owner@vger.kernel.org To: Sricharan R 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 List-Id: linux-arm-msm@vger.kernel.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 > --- Reviewed-by: Andy Gross From mboxrd@z Thu Jan 1 00:00:00 1970 From: andy.gross@linaro.org (Andy Gross) Date: Fri, 8 Jan 2016 22:38:09 -0600 Subject: [V5,4/6] i2c: qup: Add bam dma capabilities In-Reply-To: <1447760727-4897-5-git-send-email-sricharan@codeaurora.org> References: <1447760727-4897-5-git-send-email-sricharan@codeaurora.org> Message-ID: <20160109043809.GC4616@hector.attlocal.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.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 > --- Reviewed-by: Andy Gross