On Wed, Sep 10, 2014 at 09:46:04AM +0530, Varka Bhadram wrote:
> On 09/10/2014 07:00 AM, Robin Gong wrote:
> >Enable DMA support on i.mx6. The read speed can increase from 600KB/s
> >to 1.2MB/s on i.mx6q. You can disable or enable dma function in dts.
>
> (...)
>
> >+
> >+static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data
> >*spi_imx,
> >+ struct spi_master *master,
> >+ const struct resource *res)
> >+{
> >+ struct dma_slave_config slave_config = {};
> >+ int ret;
> >+
> >+ /* Prepare for TX DMA: */
> >+ master->dma_tx = dma_request_slave_channel(dev, "tx");
> >+ if (!master->dma_tx) {
> >+ dev_err(dev, "cannot get the TX DMA channel!\n");
> >+ ret = -EINVAL;
> >+ goto err;
> >+ }
> >+
> >+ slave_config.direction = DMA_MEM_TO_DEV;
> >+ slave_config.dst_addr = res->start + MXC_CSPITXDATA;
> >+ slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
> >+ slave_config.dst_maxburst = spi_imx_get_fifosize(spi_imx) / 2;
> >+ ret = dmaengine_slave_config(master->dma_tx, &slave_config);
> >+ if (ret) {
> >+ dev_err(dev, "error in TX dma configuration.");
> >+
>
> Missed terminating new line..
>
You mean lack "\n" in the print info? If yes, I can improve it in v6.
> --
> Regards,
> Varka Bhadram.
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
