diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2017-01-02 13:47:31 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2017-01-04 18:36:41 +0000 |
| commit | 25014521603f70225c1e6fa232839614f7b4f692 (patch) | |
| tree | df2b6b9ebaf90dc668ac103ec8f24c66497da216 | |
| parent | 63971c5682bf89e15083733dcd7b4610e789e843 (diff) | |
| download | linux-25014521603f70225c1e6fa232839614f7b4f692.tar.bz2 | |
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>
| -rw-r--r-- | drivers/spi/spi-pxa2xx-pci.c | 24 |
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; } |