Platform devices added through OF usually do not have any dma_mask
pointer set. In this case, point it at the coherent_dma_mask and set
their value to a 32 bit mask. This still allows any platform code to set
any more specific mask if needed, but makes the driver work for most
dma-enabled hardware.
Signed-off-by: Matthijs Kooijman <matthijs@xxxxxxxx>
---
drivers/staging/dwc2/platform.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/staging/dwc2/platform.c b/drivers/staging/dwc2/platform.c
index 74f1b7d..fdf81c2 100644
--- a/drivers/staging/dwc2/platform.c
+++ b/drivers/staging/dwc2/platform.c
@@ -187,6 +187,14 @@ static int dwc2_driver_probe(struct platform_device *dev)
hsotg->dev = &dev->dev;
+ /*
+ * Use reasonable defaults so platforms don't have to provide these.
+ */
+ if (!dev->dev.dma_mask)
+ dev->dev.dma_mask = &dev->dev.coherent_dma_mask;
+ if (!dev->dev.coherent_dma_mask)
+ dev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+
irq = platform_get_irq(dev, 0);
if (irq < 0) {
dev_err(&dev->dev, "missing IRQ resource\n");
--
1.8.0
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