diff options
| author | Mans Rullgard <mans@mansr.com> | 2016-01-09 15:45:10 +0300 |
|---|---|---|
| committer | Hans-Christian Egtvedt <egtvedt@samfundet.no> | 2016-01-14 15:40:13 +0300 |
| commit | 74843787158e9dff249f0528e7d4806102cc2c26 (patch) | |
| tree | c5a8b3c384392ac82867c4883c6e8df37152190e /drivers/mmc | |
| parent | a193f07d1e3cda30513914b1e88967419a9dbd8c (diff) | |
| download | linux-74843787158e9dff249f0528e7d4806102cc2c26.tar.xz | |
mmc: atmel-mci: restore dma on AVR32
Commit ecb89f2f5f3e7 ("mmc: atmel-mci: remove compat for non DT board
when requesting dma chan") broke dma on AVR32 and any other boards not
using DT. This restores a fallback mechanism for such cases.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Acked-by: Hans-Christian Noren Egtvedt <egtvedt@samfundet.no>
Acked-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/atmel-mci.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c index bf62e429f7fc..070dffc4699e 100644 --- a/drivers/mmc/host/atmel-mci.c +++ b/drivers/mmc/host/atmel-mci.c @@ -2280,6 +2280,23 @@ static int atmci_configure_dma(struct atmel_mci *host) { host->dma.chan = dma_request_slave_channel_reason(&host->pdev->dev, "rxtx"); + + if (PTR_ERR(host->dma.chan) == -ENODEV) { + struct mci_platform_data *pdata = host->pdev->dev.platform_data; + dma_cap_mask_t mask; + + if (!pdata->dma_filter) + return -ENODEV; + + dma_cap_zero(mask); + dma_cap_set(DMA_SLAVE, mask); + + host->dma.chan = dma_request_channel(mask, pdata->dma_filter, + pdata->dma_slave); + if (!host->dma.chan) + host->dma.chan = ERR_PTR(-ENODEV); + } + if (IS_ERR(host->dma.chan)) return PTR_ERR(host->dma.chan); |