spi: pxa2xx: Introduce DMA burst size support
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>
diff --git a/drivers/spi/spi-pxa2xx-dma.c b/drivers/spi/spi-pxa2xx-dma.c
index 1559259..e5c26c1 100644
--- a/drivers/spi/spi-pxa2xx-dma.c
+++ b/drivers/spi/spi-pxa2xx-dma.c
@@ -239,13 +239,15 @@
u32 *threshold)
{
struct pxa2xx_spi_chip *chip_info = spi->controller_data;
+ struct driver_data *drv_data = spi_controller_get_devdata(spi->controller);
+ u32 dma_burst_size = drv_data->controller_info->dma_burst_size;
/*
* If the DMA burst size is given in chip_info we use that,
* otherwise we use the default. Also we use the default FIFO
* thresholds for now.
*/
- *burst_code = chip_info ? chip_info->dma_burst_size : 1;
+ *burst_code = chip_info ? chip_info->dma_burst_size : dma_burst_size;
*threshold = SSCR1_RxTresh(RX_THRESH_DFLT)
| SSCR1_TxTresh(TX_THRESH_DFLT);