diff options
| -rw-r--r-- | drivers/dma/k3dma.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c index e415c854e291..5737d92eaeeb 100644 --- a/drivers/dma/k3dma.c +++ b/drivers/dma/k3dma.c @@ -111,6 +111,7 @@ struct k3_dma_dev { struct dma_pool *pool; u32 dma_channels; u32 dma_requests; + u32 dma_channel_mask; unsigned int irq; }; @@ -319,6 +320,9 @@ static void k3_dma_tasklet(unsigned long arg) /* check new channel request in d->chan_pending */ spin_lock_irq(&d->lock); for (pch = 0; pch < d->dma_channels; pch++) { + if (!(d->dma_channel_mask & (1 << pch))) + continue; + p = &d->phy[pch]; if (p->vchan == NULL && !list_empty(&d->chan_pending)) { @@ -336,6 +340,9 @@ static void k3_dma_tasklet(unsigned long arg) spin_unlock_irq(&d->lock); for (pch = 0; pch < d->dma_channels; pch++) { + if (!(d->dma_channel_mask & (1 << pch))) + continue; + if (pch_alloc & (1 << pch)) { p = &d->phy[pch]; c = p->vchan; @@ -856,6 +863,13 @@ static int k3_dma_probe(struct platform_device *op) "dma-channels", &d->dma_channels); of_property_read_u32((&op->dev)->of_node, "dma-requests", &d->dma_requests); + ret = of_property_read_u32((&op->dev)->of_node, + "dma-channel-mask", &d->dma_channel_mask); + if (ret) { + dev_warn(&op->dev, + "dma-channel-mask doesn't exist, considering all as available.\n"); + d->dma_channel_mask = (u32)~0UL; + } } if (!(soc_data->flags & K3_FLAG_NOCLK)) { @@ -887,8 +901,12 @@ static int k3_dma_probe(struct platform_device *op) return -ENOMEM; for (i = 0; i < d->dma_channels; i++) { - struct k3_dma_phy *p = &d->phy[i]; + struct k3_dma_phy *p; + + if (!(d->dma_channel_mask & BIT(i))) + continue; + p = &d->phy[i]; p->idx = i; p->base = d->base + i * 0x40; } |