dmaengine: acpi: Set up DMA mask based on CSRT

CSRT has an information about address width, which is supported by
the certain DMA controller.

Use information from CSRT to set up DMA mask for shared controller.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20190820131546.75744-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Andy Shevchenko 2019-08-20 16:15:37 +03:00 коммит произвёл Vinod Koul
Родитель d071fd294f
Коммит a6bc332373
1 изменённых файлов: 7 добавлений и 0 удалений

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@ -10,6 +10,7 @@
*/
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/kernel.h>
@ -82,6 +83,12 @@ static int acpi_dma_parse_resource_group(const struct acpi_csrt_group *grp,
if (si->base_request_line == 0 && si->num_handshake_signals == 0)
return 0;
/* Set up DMA mask based on value from CSRT */
ret = dma_coerce_mask_and_coherent(&adev->dev,
DMA_BIT_MASK(si->dma_address_width));
if (ret)
return 0;
adma->base_request_line = si->base_request_line;
adma->end_request_line = si->base_request_line +
si->num_handshake_signals - 1;