linux-kernel - [PATCH 1/1] ARM: dts: stm32: adjust USB OTG gadget fifo sizes in stm32mp151

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Message-ID: <20201110131059.7826-1-amelie.delaunay@st.com>
Date:   Tue, 10 Nov 2020 14:10:59 +0100
From:   Amelie Delaunay <amelie.delaunay@...com>
To:     Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Rob Herring <robh+dt@...nel.org>
CC:     <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Amelie Delaunay <amelie.delaunay@...com>
Subject: [PATCH 1/1] ARM: dts: stm32: adjust USB OTG gadget fifo sizes in stm32mp151

Defaut use case on stm32mp151 USB OTG is ethernet gadget, using EP1 bulk
endpoint (MPS=512 bytes) and EP2 interrupt endpoint (MPS=16 bytes).
This patch optimizes USB OTG FIFO sizes accordingly.

Signed-off-by: Amelie Delaunay <amelie.delaunay@...com>
---
 arch/arm/boot/dts/stm32mp151.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi
index 6ffcf06dc0e8..928e31db1526 100644
--- a/arch/arm/boot/dts/stm32mp151.dtsi
+++ b/arch/arm/boot/dts/stm32mp151.dtsi
@@ -1070,9 +1070,9 @@
 			resets = <&rcc USBO_R>;
 			reset-names = "dwc2";
 			interrupts = <GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>;
-			g-rx-fifo-size = <256>;
+			g-rx-fifo-size = <512>;
 			g-np-tx-fifo-size = <32>;
-			g-tx-fifo-size = <128 128 64 64 64 64 32 32>;
+			g-tx-fifo-size = <256 16 16 16 16 16 16 16>;
 			dr_mode = "otg";
 			usb33d-supply = <&usb33>;
 			status = "disabled";
-- 
2.17.1