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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2017-01-02 13:47:31 +0200
committerMark Brown <broonie@kernel.org>2017-01-04 18:36:41 +0000
commit25014521603f70225c1e6fa232839614f7b4f692 (patch)
treedf2b6b9ebaf90dc668ac103ec8f24c66497da216 /drivers/spi
parent63971c5682bf89e15083733dcd7b4610e789e843 (diff)
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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>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-pxa2xx-pci.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/spi/spi-pxa2xx-pci.c b/drivers/spi/spi-pxa2xx-pci.c
index 58d2d48e16a5..868452d8e3e1 100644
--- 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;
}