return 0;
}
+static int s3c64xx_spi_unprepare_transfer(struct spi_master *spi)
+{
+ struct s3c64xx_spi_driver_data *sdd = spi_master_get_devdata(spi);
+
+ if (is_polling(sdd))
+ return 0;
+
+ /* Releases DMA channels if they are allocated */
+ if (sdd->rx_dma.ch && sdd->tx_dma.ch) {
+ dma_release_channel(sdd->rx_dma.ch);
+ dma_release_channel(sdd->tx_dma.ch);
+ sdd->rx_dma.ch = 0;
+ sdd->tx_dma.ch = 0;
+ }
+
+ return 0;
+}
+
static bool s3c64xx_spi_can_dma(struct spi_master *master,
struct spi_device *spi,
struct spi_transfer *xfer)
xfer->len = origin_len;
}
- /* Releases DMA channels after data transfer is completed */
- if (sdd->rx_dma.ch && sdd->tx_dma.ch) {
- dma_release_channel(sdd->rx_dma.ch);
- dma_release_channel(sdd->tx_dma.ch);
- sdd->rx_dma.ch = NULL;
- sdd->tx_dma.ch = NULL;
- }
-
return status;
}
master->setup = s3c64xx_spi_setup;
master->cleanup = s3c64xx_spi_cleanup;
master->prepare_transfer_hardware = s3c64xx_spi_prepare_transfer;
+ master->unprepare_transfer_hardware = s3c64xx_spi_unprepare_transfer;
master->prepare_message = s3c64xx_spi_prepare_message;
master->transfer_one = s3c64xx_spi_transfer_one;
master->num_chipselect = sci->num_cs;