ARM: dts: lpc18xx: configure dwmac properly

Configure the DWMAC FIFO sizes, burst length and threshold DMA mode on
LPC18xx/43xx SoCs. These parameters are needed for correct operation of
the Ethernet MAC. The DWMAC on LPC18xx/43xx does not support RSF DMA
mode and therefore must use threshold mode.

Signed-off-by: Joachim Eastwood <manabian@gmail.com>

diff --git a/arch/arm/boot/dts/lpc18xx.dtsi b/arch/arm/boot/dts/lpc18xx.dtsi
index fdb736c82045ca25671728112bcdd982939d5ae3..3d828fcfc7c43e958546ae62866cfbb07c65615f 100644 (file)
--- a/arch/arm/boot/dts/lpc18xx.dtsi
+++ b/arch/arm/boot/dts/lpc18xx.dtsi
@@ -186,6 +186,10 @@
                        clock-names = "stmmaceth";
                        resets = <&rgu 22>;
                        reset-names = "stmmaceth";
+                       rx-fifo-depth = <256>;
+                       tx-fifo-depth = <256>;
+                       snps,pbl = <4>; /* 32 (8x mode) */
+                       snps,force_thresh_dma_mode;
                        status = "disabled";
                };