stmmac: Read tx-fifo-depth and rx-fifo-depth from the devicetree

Read the tx-fifo-depth and rx-fifo-depth from the devicetree. The Synopsys
stmmac controller fifos are configurable per product instance, and the fifo
sizes are needed to configure certain features correctly such as flow control.

Signed-off-by: Vince Bridgers <vbridger@opensource.altera.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index f9b42f11950f..705bbdf93940 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -181,6 +181,10 @@ static int stmmac_probe_config_dt(struct platform_device *pdev,
                                      sizeof(struct stmmac_mdio_bus_data),
                                      GFP_KERNEL);
 
+        of_property_read_u32(np, "tx-fifo-depth", &plat->tx_fifo_size);
+
+        of_property_read_u32(np, "rx-fifo-depth", &plat->rx_fifo_size);
+
         plat->force_sf_dma_mode =
                 of_property_read_bool(np, "snps,force_sf_dma_mode");