diff options
| author |   Dmitry Osipenko <digetx@gmail.com> | 2017-10-20 01:08:04 +0300 |
|---|---|---|
| committer |   Thierry Reding <treding@nvidia.com> | 2017-12-21 17:04:12 +0100 |
| commit | ccf151847b81a3ad779b64f5f71f0632f2009eb6 (patch) | |
| tree | 883b67cc6cc273e7f7912c8d45a4cd3aeee6c898 /drivers/soc | |
| parent | soc/tegra: fuse: Fix reading registers using DMA on Tegra20 (diff) | |
| download | linux-dev-ccf151847b81a3ad779b64f5f71f0632f2009eb6.tar.xz linux-dev-ccf151847b81a3ad779b64f5f71f0632f2009eb6.zip | |
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>
Diffstat (limited to 'drivers/soc')
| -rw-r--r-- | drivers/soc/tegra/fuse/fuse-tegra20.c | 9 |
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; |