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mmc: atmel-mci: convert to dma_request_slave_channel_compat() 

Use generic DMA DT helper. Platforms booting with or without DT populated
are both supported.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Ludovic Desroches 2013-04-19 09:11:22 +00:00 committed by Chris Ball
parent 361b848202
commit 8c964df07a
1 changed files with 12 additions and 13 deletions
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25
drivers/mmc/host/atmel-mci.c
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@ -2230,10 +2230,15 @@ 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;
@ -2245,24 +2250,18 @@ 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;