From: David Lechner <dlechner@baylibre.com>
Date: Mon, 15 Jun 2026 19:23:32 +0000 (-0500)
Subject: net: mtk_eth: select LMB_LIMIT_DMA_BELOW_RAM_TOP
X-Git-Tag: v2026.07~13^2~6
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=2d9a9f1cad906bbc13e8c131ed6932d0da4e28ee;p=thirdparty%2Fu-boot.git

net: mtk_eth: select LMB_LIMIT_DMA_BELOW_RAM_TOP

Default to CONFIG_LMB_LIMIT_DMA_BELOW_RAM_TOP=y when MEDIATEK_ETH is
enabled. The MediaTek Ethernet controller can only access the first 4GB
of RAM when DMA is used.

Link: https://patch.msgid.link/20260615-mtk-fix-ram-size-v2-2-f72cfc52ce58@baylibre.com
Signed-off-by: David Lechner <dlechner@baylibre.com>
---

diff --git a/drivers/net/mtk_eth/Kconfig b/drivers/net/mtk_eth/Kconfig
index 5d4e54ab90e..7d58f542bde 100644
--- a/drivers/net/mtk_eth/Kconfig
+++ b/drivers/net/mtk_eth/Kconfig
@@ -5,6 +5,7 @@ config MEDIATEK_ETH
 	select PHYLIB
 	select DM_GPIO
 	select DM_RESET
+	select LMB_LIMIT_DMA_BELOW_RAM_TOP
 	help
 	  This Driver support MediaTek Ethernet GMAC
 	  Say Y to enable support for the MediaTek Ethernet GMAC.