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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>
This commit is contained in:
Dmitry Osipenko 2017-10-20 01:08:04 +03:00 committed by Thierry Reding
parent 55a042b3f6
commit ccf151847b
1 changed files with 8 additions and 1 deletions
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9
drivers/soc/tegra/fuse/fuse-tegra20.c
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@ -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;