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spi: pxa2xx: Introduce DMA burst size support

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Some masters may have different DMA burst size than hard coded default.
In such case respect the value given by DMA burst size provided via
platform data.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reviewed-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andy Shevchenko
2019-03-19 17:48:42 +02:00
committed by Mark Brown
parent 560ee7e910
commit 37821a82e6
4 changed files with 9 additions and 1 deletions
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4
drivers/spi/spi-pxa2xx-pci.c
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@@ -34,6 +34,8 @@ struct pxa_spi_info {
void *tx_param;
void *rx_param;
int dma_burst_size;
int (*setup)(struct pci_dev *pdev, struct pxa_spi_info *c);
};
@@ -132,6 +134,7 @@ static int mrfld_spi_setup(struct pci_dev *dev, struct pxa_spi_info *c)
rx->dma_dev = &dma_dev->dev;
c->dma_filter = lpss_dma_filter;
c->dma_burst_size = 8;
return 0;
}
@@ -222,6 +225,7 @@ static int pxa2xx_spi_pci_probe(struct pci_dev *dev,
spi_pdata.tx_param = c->tx_param;
spi_pdata.rx_param = c->rx_param;
spi_pdata.enable_dma = c->rx_param && c->tx_param;
spi_pdata.dma_burst_size = c->dma_burst_size ? c->dma_burst_size : 1;
ssp = &spi_pdata.ssp;
ssp->phys_base = pci_resource_start(dev, 0);