According to our HW dev, there is no provision for software to safely
disable RX DMA in the AU-NB8800 hardware block (ethernet DMA). Thus,
it is the responsibility of the SoC designer to provide such a feature.
The nb8800_dma_stop() implementation is a clever hack that works most
of the times, but it breaks the DMA state machine in rare cases.
Therefore, let's drop generic support.
FWIW, tango chips provide a reset register. When the ethernet block
comes out of reset, DMA is disabled.
Signed-off-by: Marc Gonzalez <marc_gonza...@sigmadesigns.com>
---
drivers/net/ethernet/aurora/nb8800.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/net/ethernet/aurora/nb8800.c
b/drivers/net/ethernet/aurora/nb8800.c
index e94159507847..26f719e2d6ca 100644
--- a/drivers/net/ethernet/aurora/nb8800.c
+++ b/drivers/net/ethernet/aurora/nb8800.c
@@ -1335,9 +1335,6 @@ static const struct nb8800_ops nb8800_tango4_ops = {
};
static const struct of_device_id nb8800_dt_ids[] = {
- {
- .compatible = "aurora,nb8800",
- },
{
.compatible = "sigma,smp8642-ethernet",
.data = &nb8800_tangox_ops,
--
2.15.0
