Currently fuse driver requests DMA channel from an arbitrary DMA device,
it is not a problem since there is only one DMA provider for Tegra20 yet,
but it may become troublesome if another provider will appear.
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
drivers/soc/tegra/fuse/fuse-tegra20.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/soc/tegra/fuse/fuse-tegra20.c b/drivers/soc/tegra/fuse/fuse-tegra20.c
index 27e9ac7d3165..49ff017f3ded 100644
--- a/drivers/soc/tegra/fuse/fuse-tegra20.c
+++ b/drivers/soc/tegra/fuse/fuse-tegra20.c
@@ -96,6 +96,13 @@ static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset)
return value;
}
+static bool dma_filter(struct dma_chan *chan, void *filter_param)
+{
+ struct device_node *np = chan->device->dev->of_node;
+
+ return of_device_is_compatible(np, "nvidia,tegra20-apbdma");
+}
+
static int tegra20_fuse_probe(struct tegra_fuse *fuse)
{
dma_cap_mask_t mask;
@@ -103,7 +110,7 @@ static int tegra20_fuse_probe(struct tegra_fuse *fuse)
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
- fuse->apbdma.chan = dma_request_channel(mask, NULL, NULL);
+ fuse->apbdma.chan = __dma_request_channel(&mask, dma_filter, NULL);
if (!fuse->apbdma.chan)
return -EPROBE_DEFER;
--
2.14.2
--
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