spi: pxa2xx-pci: Enable DMA for Intel Merrifield

SPI controller on Intel Merrifield is backed by DMA engine. Add necessary bits
to support it.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c
index 58d2d48e16a530869528288d50f3a6581c3ea311..868452d8e3e11c4094527fcce17d4c5a55dc27d1 100644 (file)
--- a/drivers/spi/spi-pxa2xx-pci.c
+++ b/drivers/spi/spi-pxa2xx-pci.c
@@ -41,6 +41,13 @@ struct pxa_spi_info {
 static struct dw_dma_slave byt_tx_param = { .dst_id = 0 };
 static struct dw_dma_slave byt_rx_param = { .src_id = 1 };
 
+static struct dw_dma_slave mrfld3_tx_param = { .dst_id = 15 };
+static struct dw_dma_slave mrfld3_rx_param = { .src_id = 14 };
+static struct dw_dma_slave mrfld5_tx_param = { .dst_id = 13 };
+static struct dw_dma_slave mrfld5_rx_param = { .src_id = 12 };
+static struct dw_dma_slave mrfld6_tx_param = { .dst_id = 11 };
+static struct dw_dma_slave mrfld6_rx_param = { .src_id = 10 };
+
 static struct dw_dma_slave bsw0_tx_param = { .dst_id = 0 };
 static struct dw_dma_slave bsw0_rx_param = { .src_id = 1 };
 static struct dw_dma_slave bsw1_tx_param = { .dst_id = 6 };
@@ -93,22 +100,39 @@ static int lpss_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
 
 static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
 {
+       struct pci_dev *dma_dev = pci_get_slot(dev->bus, PCI_DEVFN(21, 0));
+       struct dw_dma_slave *tx, *rx;
+
        switch (PCI_FUNC(dev->devfn)) {
        case 0:
                c->port_id = 3;
                c->num_chipselect = 1;
+               c->tx_param = &mrfld3_tx_param;
+               c->rx_param = &mrfld3_rx_param;
                break;
        case 1:
                c->port_id = 5;
                c->num_chipselect = 4;
+               c->tx_param = &mrfld5_tx_param;
+               c->rx_param = &mrfld5_rx_param;
                break;
        case 2:
                c->port_id = 6;
                c->num_chipselect = 1;
+               c->tx_param = &mrfld6_tx_param;
+               c->rx_param = &mrfld6_rx_param;
                break;
        default:
                return -ENODEV;
        }
+
+       tx = c->tx_param;
+       tx->dma_dev = &dma_dev->dev;
+
+       rx = c->rx_param;
+       rx->dma_dev = &dma_dev->dev;
+
+       c->dma_filter = lpss_dma_filter;
        return 0;
 }