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Commit 7611c7a5 authored by Alexander Stein's avatar Alexander Stein Committed by Mark Brown
Browse files

spi/topcliff-pch: Fix DMA channel 



bus_num might be asigned dynamically to e.g. 32766. In this case the
calculated DMA channel based on SPI bus number is bogus. Use SPI channel
number instead for calculation.

Signed-off-by: default avatarAlexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 38dbfb59

drivers/spi/spi-topcliff-pch.c

+2 −2
Original line number Diff line number Diff line
@@ -915,7 +915,7 @@ static void pch_spi_request_dma(struct pch_spi_data *data, int bpw) 
	/* Set Tx DMA */

	param = &dma->param_tx;

	param->dma_dev = &dma_dev->dev;

	param->chan_id = data->master->bus_num * 2; /* Tx = 0, 2 */

	param->chan_id = data->ch * 2; /* Tx = 0, 2 */;

	param->tx_reg = data->io_base_addr + PCH_SPDWR;

	param->width = width;

	chan = dma_request_channel(mask, pch_spi_filter, param);
@@ -930,7 +930,7 @@ static void pch_spi_request_dma(struct pch_spi_data *data, int bpw) 
	/* Set Rx DMA */

	param = &dma->param_rx;

	param->dma_dev = &dma_dev->dev;

	param->chan_id = data->master->bus_num * 2 + 1; /* Rx = Tx + 1 */

	param->chan_id = data->ch * 2 + 1; /* Rx = Tx + 1 */;

	param->rx_reg = data->io_base_addr + PCH_SPDRR;

	param->width = width;

	chan = dma_request_channel(mask, pch_spi_filter, param);