[PATCH] ARM: dts: meson8b: add ethernet fifo sizes

Jerome Brunet jbrunet at baylibre.com
Thu Jul 18 02:36:23 PDT 2019

If unspecified in DT, the fifo sizes are not automatically detected by
the dwmac1000 dma driver and the reported fifo sizes default to 0.
Because of this, flow control will be turned off on the device.

Add the fifo sizes provided by the datasheet in the SoC in DT so
flow control may be enabled if necessary.

Signed-off-by: Jerome Brunet <jbrunet at baylibre.com>
 arch/arm/boot/dts/meson8b.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
index fba2c70c2fda..b044ad78b475 100644
--- a/arch/arm/boot/dts/meson8b.dtsi
+++ b/arch/arm/boot/dts/meson8b.dtsi
@@ -410,6 +410,8 @@
 		 <&clkc CLKID_MPLL2>,
 		 <&clkc CLKID_MPLL2>;
 	clock-names = "stmmaceth", "clkin0", "clkin1";
+	rx-fifo-depth = <4096>;
+	tx-fifo-depth = <2048>;
 	resets = <&reset RESET_ETHERNET>;
 	reset-names = "stmmaceth";

More information about the linux-amlogic mailing list