From: Joachim Eastwood <manabian@gmail.com>
Date: Fri, 6 May 2016 06:57:49 +0000 (+0200)
Subject: ARM: dts: lpc18xx: configure dwmac properly
X-Git-Tag: v4.9-rc1~76^2~29^2
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=3ed6d3cb14097218629ace56aa1a2d0a862b3125;p=karo-tx-linux.git

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 fdb736c82045..3d828fcfc7c4 100644
--- 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";
 		};