linux-kernel - Re: [PATCH v2 2/2] dma: Add Xilinx zynqmp dma engine driver support

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Message-ID: <CAM=Q2ctpOhxryYqgiHDQry7Q_1noYGEX4pYg+tp+wLgV9=X1hw@mail.gmail.com>
Date:	Mon, 15 Jun 2015 20:35:17 +0530
From:	Shubhrajyoti Datta <omaplinuxkernel@...il.com>
To:	Punnaiah Choudary Kalluri <punnaiah.choudary.kalluri@...inx.com>
Cc:	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, Kumar Gala <galak@...eaurora.org>,
	Michal Simek <michal.simek@...inx.com>,
	Sören Brinkmann <soren.brinkmann@...inx.com>,
	vinod.koul@...el.com, dan.j.williams@...el.com,
	devicetree@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	kpc528@...il.com, kalluripunnaiahchoudary@...il.com,
	dmaengine@...r.kernel.org,
	Punnaiah Choudary Kalluri <punnaia@...inx.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 2/2] dma: Add Xilinx zynqmp dma engine driver support

On Mon, Jun 15, 2015 at 8:06 PM, Punnaiah Choudary Kalluri
<punnaiah.choudary.kalluri@...inx.com> wrote:
> Added the basic driver for zynqmp dma engine used in Zynq
> UltraScale+ MPSoC. The initial release of this driver supports
> only memory to memory transfers.
>
> Signed-off-by: Punnaiah Choudary Kalluri <punnaia@...inx.com>
> ---
<snip>

> +/**
> + * zynqmp_dma_chan_is_idle - Provides the channel idle status
> + * @chan: ZynqMP DMA DMA channel pointer
> + *
> + * Return: '1' if the channel is idle otherwise '0'
> + */
> +static int zynqmp_dma_chan_is_idle(struct zynqmp_dma_chan *chan)

maybe this could return bool.

> +{
> +       u32 regval;
> +
> +       regval = readl(chan->regs + STATUS);
> +       if (regval & STATUS_BUSY)
> +               return 0;
> +
> +       return 1;
> +}
> +
--
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