From 0cad6684881805a3c4712da95e0149f31fe47a69 Mon Sep 17 00:00:00 2001 From: Matt Porter Date: Thu, 20 Sep 2012 00:37:54 -0400 Subject: [PATCH] spi: omap2-mcspi: convert to dma_request_slave_channel_compat() Convert dmaengine channel requests to use dma_request_slave_channel_compat(). This supports the DT case of platforms requiring channel selection from either the OMAP DMA or the EDMA engine. AM33xx only boots from DT and is the only user implementing EDMA so in the !DT case we can default to the OMAP DMA filter. Signed-off-by: Matt Porter Acked-by: Mark Brown --- drivers/spi/spi-omap2-mcspi.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/drivers/spi/spi-omap2-mcspi.c b/drivers/spi/spi-omap2-mcspi.c index 61eef47ae821..642f5f8db532 100644 --- a/drivers/spi/spi-omap2-mcspi.c +++ b/drivers/spi/spi-omap2-mcspi.c @@ -102,6 +102,9 @@ struct omap2_mcspi_dma { struct completion dma_tx_completion; struct completion dma_rx_completion; + + char dma_rx_ch_name[14]; + char dma_tx_ch_name[14]; }; /* use PIO for small transfers, avoiding DMA setup/teardown overhead and @@ -826,14 +829,23 @@ static int omap2_mcspi_request_dma(struct spi_device *spi) dma_cap_zero(mask); dma_cap_set(DMA_SLAVE, mask); sig = mcspi_dma->dma_rx_sync_dev; - mcspi_dma->dma_rx = dma_request_channel(mask, omap_dma_filter_fn, &sig); + + mcspi_dma->dma_rx = + dma_request_slave_channel_compat(mask, omap_dma_filter_fn, + &sig, &master->dev, + mcspi_dma->dma_rx_ch_name); + if (!mcspi_dma->dma_rx) { dev_err(&spi->dev, "no RX DMA engine channel for McSPI\n"); return -EAGAIN; } sig = mcspi_dma->dma_tx_sync_dev; - mcspi_dma->dma_tx = dma_request_channel(mask, omap_dma_filter_fn, &sig); + mcspi_dma->dma_tx = + dma_request_slave_channel_compat(mask, omap_dma_filter_fn, + &sig, &master->dev, + mcspi_dma->dma_tx_ch_name); + if (!mcspi_dma->dma_tx) { dev_err(&spi->dev, "no TX DMA engine channel for McSPI\n"); dma_release_channel(mcspi_dma->dma_rx); @@ -1244,12 +1256,13 @@ static int omap2_mcspi_probe(struct platform_device *pdev) goto free_master; for (i = 0; i < master->num_chipselect; i++) { - char dma_ch_name[14]; + char *dma_rx_ch_name = mcspi->dma_channels[i].dma_rx_ch_name; + char *dma_tx_ch_name = mcspi->dma_channels[i].dma_tx_ch_name; struct resource *dma_res; - sprintf(dma_ch_name, "rx%d", i); + sprintf(dma_rx_ch_name, "rx%d", i); dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA, - dma_ch_name); + dma_rx_ch_name); if (!dma_res) { dev_dbg(&pdev->dev, "cannot get DMA RX channel\n"); status = -ENODEV; @@ -1257,9 +1270,9 @@ static int omap2_mcspi_probe(struct platform_device *pdev) } mcspi->dma_channels[i].dma_rx_sync_dev = dma_res->start; - sprintf(dma_ch_name, "tx%d", i); + sprintf(dma_tx_ch_name, "tx%d", i); dma_res = platform_get_resource_byname(pdev, IORESOURCE_DMA, - dma_ch_name); + dma_tx_ch_name); if (!dma_res) { dev_dbg(&pdev->dev, "cannot get DMA TX channel\n"); status = -ENODEV; -- 2.39.5