linux-kernel - Re: [PATCH 03/18] dmaengine: st_fdma: Add STMicroelectronics FDMA engine driver support

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Date:	Mon, 25 Apr 2016 10:04:15 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Appana Durga Kedareswara Rao <appana.durga.rao@...inx.com>
Cc:	Peter Griffin <peter.griffin@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"srinivas.kandagatla@...il.com" <srinivas.kandagatla@...il.com>,
	"maxime.coquelin@...com" <maxime.coquelin@...com>,
	"patrice.chotard@...com" <patrice.chotard@...com>,
	"vinod.koul@...el.com" <vinod.koul@...el.com>,
	"dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"arnd@...db.de" <arnd@...db.de>,
	"broonie@...nel.org" <broonie@...nel.org>,
	"ludovic.barre@...com" <ludovic.barre@...com>,
	Appana Durga Kedareswara Rao <appanad@...inx.com>
Subject: Re: [PATCH 03/18] dmaengine: st_fdma: Add STMicroelectronics FDMA
 engine driver support

On Thu, 21 Apr 2016, Appana Durga Kedareswara Rao wrote:
> > -----Original Message-----
> > From: dmaengine-owner@...r.kernel.org [mailto:dmaengine-
> > owner@...r.kernel.org] On Behalf Of Peter Griffin
> > Sent: Thursday, April 21, 2016 4:34 PM
> > To: linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org;
> > srinivas.kandagatla@...il.com; maxime.coquelin@...com;
> > patrice.chotard@...com; vinod.koul@...el.com
> > Cc: peter.griffin@...aro.org; lee.jones@...aro.org;
> > dmaengine@...r.kernel.org; devicetree@...r.kernel.org; arnd@...db.de;
> > broonie@...nel.org; ludovic.barre@...com
> > Subject: [PATCH 03/18] dmaengine: st_fdma: Add STMicroelectronics FDMA
> > engine driver support

What is this text?  If you wish to contribute to upstream mailing
lists, please fix your email client.  Also, please read:

  Documentation/email-clients.txt

> > This patch adds support for the Flexible Direct Memory Access (FDMA) core
> > driver. The FDMA is a slim core CPU with a dedicated firmware.
> > It is a general purpose DMA controller capable of supporting 16
> > independent DMA channels. Data moves maybe from memory to memory
> > or between memory and paced latency critical real time targets and it
> > is found on al STi based chipsets.
> > 
> > Signed-off-by: Ludovic Barre <ludovic.barre@...com>
> > Signed-off-by: Peter Griffin <peter.griffin@...aro.org>
> > ---
> >  drivers/dma/Kconfig   |  12 +
> >  drivers/dma/Makefile  |   1 +
> >  drivers/dma/st_fdma.c | 967
> > ++++++++++++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 980 insertions(+)
> >  create mode 100644 drivers/dma/st_fdma.c

[...]
> > +static int st_fdma_clk_enable(struct st_fdma_dev *fdev)
> > +{
> > +	int i, ret;
> > +
> > +	for (i = 0; i < CLK_MAX_NUM; i++) {
> > +		ret = clk_prepare_enable(fdev->clks[i]);
> > +		if (ret < 0)
> 
> You should disable and unprepared the other clocks...

Replying to a 1000 line email and not snipping (especially for a one
single-line comment), it considered bad etiquette.  Please remove all
unrelated text in future.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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