diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2016-05-04 11:23:08 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-05-04 14:12:00 +0300 |
| commit | d15b08fb2246fa28b4cf01337951026177641af4 (patch) | |
| tree | c8481feb27e58a604253d49507237b6ef3f32be4 /drivers/mmc/host/omap.c | |
| parent | 437db4c6e79881d33aca521987188c728df350a8 (diff) | |
| download | linux-d15b08fb2246fa28b4cf01337951026177641af4.tar.xz | |
mmc: omap: Use dma_request_chan() for requesting DMA channel
With the new dma_request_chan() the client driver does not need to look for
the DMA resource and it does not need to pass filter_fn anymore.
By switching to the new API the driver can now support deferred probing
against DMA.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
CC: Ulf Hansson <ulf.hansson@linaro.org>
CC: Jarkko Nikula <jarkko.nikula@bitmer.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/omap.c')
| -rw-r--r-- | drivers/mmc/host/omap.c | 48 |
1 files changed, 25 insertions, 23 deletions
diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c index b9958a123594..f23d65eb070d 100644 --- a/drivers/mmc/host/omap.c +++ b/drivers/mmc/host/omap.c @@ -23,7 +23,6 @@ #include <linux/spinlock.h> #include <linux/timer.h> #include <linux/of.h> -#include <linux/omap-dma.h> #include <linux/mmc/host.h> #include <linux/mmc/card.h> #include <linux/mmc/mmc.h> @@ -1321,8 +1320,6 @@ static int mmc_omap_probe(struct platform_device *pdev) struct omap_mmc_platform_data *pdata = pdev->dev.platform_data; struct mmc_omap_host *host = NULL; struct resource *res; - dma_cap_mask_t mask; - unsigned sig = 0; int i, ret = 0; int irq; @@ -1382,29 +1379,34 @@ static int mmc_omap_probe(struct platform_device *pdev) goto err_free_iclk; } - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - host->dma_tx_burst = -1; host->dma_rx_burst = -1; - res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); - if (res) - sig = res->start; - host->dma_tx = dma_request_slave_channel_compat(mask, - omap_dma_filter_fn, &sig, &pdev->dev, "tx"); - if (!host->dma_tx) - dev_warn(host->dev, "unable to obtain TX DMA engine channel %u\n", - sig); - - res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); - if (res) - sig = res->start; - host->dma_rx = dma_request_slave_channel_compat(mask, - omap_dma_filter_fn, &sig, &pdev->dev, "rx"); - if (!host->dma_rx) - dev_warn(host->dev, "unable to obtain RX DMA engine channel %u\n", - sig); + host->dma_tx = dma_request_chan(&pdev->dev, "tx"); + if (IS_ERR(host->dma_tx)) { + ret = PTR_ERR(host->dma_tx); + if (ret == -EPROBE_DEFER) { + clk_put(host->fclk); + goto err_free_iclk; + } + + host->dma_tx = NULL; + dev_warn(host->dev, "TX DMA channel request failed\n"); + } + + host->dma_rx = dma_request_chan(&pdev->dev, "rx"); + if (IS_ERR(host->dma_rx)) { + ret = PTR_ERR(host->dma_rx); + if (ret == -EPROBE_DEFER) { + if (host->dma_tx) + dma_release_channel(host->dma_tx); + clk_put(host->fclk); + goto err_free_iclk; + } + + host->dma_rx = NULL; + dev_warn(host->dev, "RX DMA channel request failed\n"); + } ret = request_irq(host->irq, mmc_omap_irq, 0, DRIVER_NAME, host); if (ret) |