linux-kernel - [PATCH] arm64: dts: meson: add ethernet fifo sizes

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Message-Id: <20190718090301.19283-1-jbrunet@baylibre.com>
Date:   Thu, 18 Jul 2019 11:03:01 +0200
From:   Jerome Brunet <jbrunet@...libre.com>
To:     Kevin Hilman <khilman@...libre.com>
Cc:     Jerome Brunet <jbrunet@...libre.com>, devicetree@...r.kernel.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] arm64: dts: meson: add ethernet fifo sizes

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 datasheets in the SoC in DT so
flow control may be enabled if necessary.

Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
 arch/arm64/boot/dts/amlogic/meson-axg.dtsi  | 2 ++
 arch/arm64/boot/dts/amlogic/meson-g12a.dtsi | 2 ++
 arch/arm64/boot/dts/amlogic/meson-gx.dtsi   | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
index 6219337033a0..12bf959c17a7 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
@@ -182,6 +182,8 @@
 				 <&clkc CLKID_FCLK_DIV2>,
 				 <&clkc CLKID_MPLL2>;
 			clock-names = "stmmaceth", "clkin0", "clkin1";
+			rx-fifo-depth = <4096>;
+			tx-fifo-depth = <2048>;
 			status = "disabled";
 		};
 
diff --git a/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi
index 0bb9705a33f1..c8b9b9754598 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-g12a.dtsi
@@ -150,6 +150,8 @@
 				 <&clkc CLKID_FCLK_DIV2>,
 				 <&clkc CLKID_MPLL2>;
 			clock-names = "stmmaceth", "clkin0", "clkin1";
+			rx-fifo-depth = <4096>;
+			tx-fifo-depth = <2048>;
 			status = "disabled";
 
 			mdio0: mdio {
diff --git a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
index 74d03fc706be..e62aad5bf867 100644
--- a/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-gx.dtsi
@@ -493,6 +493,8 @@
 			       0x0 0xc8834540 0x0 0x4>;
 			interrupts = <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>;
 			interrupt-names = "macirq";
+			rx-fifo-depth = <4096>;
+			tx-fifo-depth = <2048>;
 			status = "disabled";
 		};
 
-- 
2.21.0