@@ -943,12 +943,19 @@ static int bcm2835_dma_probe(struct platform_device *pdev)
}
/* Request DMA channel mask from device tree */
- if (of_property_read_u32(pdev->dev.of_node,
- "brcm,dma-channel-mask",
- &chans_available)) {
- dev_err(&pdev->dev, "Failed to get channel mask\n");
- rc = -EINVAL;
- goto err_no_dma;
+ rc = of_property_read_u32(pdev->dev.of_node, "dma-channel-mask",
+ &chans_available);
+
+ if (rc) {
+ /* Try deprecated property */
+ if (of_property_read_u32(pdev->dev.of_node,
+ "brcm,dma-channel-mask",
+ &chans_available)) {
+ dev_err(&pdev->dev, "Failed to get channel mask\n");
+ goto err_no_dma;
+ }
+
+ dev_warn(&pdev->dev, "Please update DT blob\n");
}
/* get irqs for each channel that we support */
Nowadays there is a generic property for dma-channel-mask in the DMA controller binding. So prefer this one instead of the old vendor specific one. Print a warning in case the old one is used. Btw use the result of of_property_read_u32() as return code in error case. Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> --- drivers/dma/bcm2835-dma.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-)