soc/tegra: fuse: Explicitly request DMA channel from APB DMA driver (ccf15184) · Commits · 戴 / test

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>

drivers/soc/tegra/fuse/fuse-tegra20.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -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;

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