diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2016-04-29 16:06:18 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-05-04 10:28:03 +0300 |
| commit | 81eef6ca92014845d40e3f1310e42b7010303acc (patch) | |
| tree | c64797f95e80828c683d906caf8ec023907c39a9 /drivers | |
| parent | 4406433dec687c54be48a18a71dd28acb319137e (diff) | |
| download | linux-81eef6ca92014845d40e3f1310e42b7010303acc.tar.xz | |
mmc: omap_hsmmc: 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>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/host/omap_hsmmc.c | 50 |
1 files changed, 10 insertions, 40 deletions
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 3563321a3cf3..24ebc9a8de89 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -32,7 +32,6 @@ #include <linux/of_irq.h> #include <linux/of_gpio.h> #include <linux/of_device.h> -#include <linux/omap-dmaengine.h> #include <linux/mmc/host.h> #include <linux/mmc/core.h> #include <linux/mmc/mmc.h> @@ -1993,8 +1992,6 @@ static int omap_hsmmc_probe(struct platform_device *pdev) struct resource *res; int ret, irq; const struct of_device_id *match; - dma_cap_mask_t mask; - unsigned tx_req, rx_req; const struct omap_mmc_of_data *data; void __iomem *base; @@ -2124,44 +2121,17 @@ static int omap_hsmmc_probe(struct platform_device *pdev) omap_hsmmc_conf_bus_power(host); - if (!pdev->dev.of_node) { - res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); - if (!res) { - dev_err(mmc_dev(host->mmc), "cannot get DMA TX channel\n"); - ret = -ENXIO; - goto err_irq; - } - tx_req = res->start; - - res = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); - if (!res) { - dev_err(mmc_dev(host->mmc), "cannot get DMA RX channel\n"); - ret = -ENXIO; - goto err_irq; - } - rx_req = res->start; - } - - dma_cap_zero(mask); - dma_cap_set(DMA_SLAVE, mask); - - host->rx_chan = - dma_request_slave_channel_compat(mask, omap_dma_filter_fn, - &rx_req, &pdev->dev, "rx"); - - if (!host->rx_chan) { - dev_err(mmc_dev(host->mmc), "unable to obtain RX DMA engine channel\n"); - ret = -ENXIO; + host->rx_chan = dma_request_chan(&pdev->dev, "rx"); + if (IS_ERR(host->rx_chan)) { + dev_err(mmc_dev(host->mmc), "RX DMA channel request failed\n"); + ret = PTR_ERR(host->rx_chan); goto err_irq; } - host->tx_chan = - dma_request_slave_channel_compat(mask, omap_dma_filter_fn, - &tx_req, &pdev->dev, "tx"); - - if (!host->tx_chan) { - dev_err(mmc_dev(host->mmc), "unable to obtain TX DMA engine channel\n"); - ret = -ENXIO; + host->tx_chan = dma_request_chan(&pdev->dev, "tx"); + if (IS_ERR(host->tx_chan)) { + dev_err(mmc_dev(host->mmc), "TX DMA channel request failed\n"); + ret = PTR_ERR(host->tx_chan); goto err_irq; } @@ -2219,9 +2189,9 @@ err_slot_name: mmc_remove_host(mmc); err_irq: device_init_wakeup(&pdev->dev, false); - if (host->tx_chan) + if (!IS_ERR_OR_NULL(host->tx_chan)) dma_release_channel(host->tx_chan); - if (host->rx_chan) + if (!IS_ERR_OR_NULL(host->rx_chan)) dma_release_channel(host->rx_chan); pm_runtime_dont_use_autosuspend(host->dev); pm_runtime_put_sync(host->dev); |