On 04/15/2013 02:16 PM, ludovic.desroches@xxxxxxxxx :
> From: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
>
> Use generic DMA DT helper. Platforms booting with or without DT populated are
> both supported.
>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>
> ---
> drivers/mmc/host/atmel-mci.c | 25 ++++++++++++-------------
> 1 file changed, 12 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index 10f8b73..73d5d24 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -2224,10 +2224,15 @@ static void __exit atmci_cleanup_slot(struct atmel_mci_slot *slot,
> mmc_free_host(slot->mmc);
> }
>
> -static bool atmci_filter(struct dma_chan *chan, void *slave)
> +static bool atmci_filter(struct dma_chan *chan, void *pdata)
> {
> - struct mci_dma_data *sl = slave;
> + struct mci_platform_data *sl_pdata = pdata;
> + struct mci_dma_data *sl;
>
> + if (!sl_pdata)
> + return false;
> +
> + sl = sl_pdata->dma_slave;
> if (sl && find_slave_dev(sl) == chan->device->dev) {
> chan->private = slave_data_ptr(sl);
> return true;
> @@ -2239,24 +2244,18 @@ static bool atmci_filter(struct dma_chan *chan, void *slave)
> static bool atmci_configure_dma(struct atmel_mci *host)
> {
> struct mci_platform_data *pdata;
> + dma_cap_mask_t mask;
>
> if (host == NULL)
> return false;
>
> pdata = host->pdev->dev.platform_data;
>
> - if (!pdata)
> - return false;
> + dma_cap_zero(mask);
> + dma_cap_set(DMA_SLAVE, mask);
>
> - if (pdata->dma_slave && find_slave_dev(pdata->dma_slave)) {
> - dma_cap_mask_t mask;
> -
> - /* Try to grab a DMA channel */
> - dma_cap_zero(mask);
> - dma_cap_set(DMA_SLAVE, mask);
> - host->dma.chan =
> - dma_request_channel(mask, atmci_filter, pdata->dma_slave);
> - }
> + host->dma.chan = dma_request_slave_channel_compat(mask, atmci_filter, pdata,
> + &host->pdev->dev, "rxtx");
> if (!host->dma.chan) {
> dev_warn(&host->pdev->dev, "no DMA channel available\n");
> return false;
>
--
Nicolas Ferre
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