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authorDmitry Osipenko <digetx@gmail.com>2017-10-20 01:08:04 +0300
committerThierry Reding <treding@nvidia.com>2017-12-21 19:04:12 +0300
commitccf151847b81a3ad779b64f5f71f0632f2009eb6 (patch)
tree883b67cc6cc273e7f7912c8d45a4cd3aeee6c898
parent55a042b3f68fc8c68adf4333ff74c4d3de796589 (diff)
downloadlinux-ccf151847b81a3ad779b64f5f71f0632f2009eb6.tar.xz
soc/tegra: fuse: Explicitly request DMA channel from APB DMA driver
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@gmail.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
-rw-r--r--drivers/soc/tegra/fuse/fuse-tegra20.c9
1 files changed, 8 insertions, 1 deletions
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 @@ out:
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;