arm64: dts: freescale: imx{91,93}-phycore-som: Adjust PHY RST drive-strength

According to measurements, the PHY reset signal shows an overshoot on
the rising edge that exceeds the specified limits (max 2.1V) when using
X4 strength on ENET2_RXC. Reduce drive-strength to X1 to decrease the
overshoot and bring signal within specification limits.

Signed-off-by: Primoz Fiser <primoz.fiser@norik.com>
Signed-off-by: Frank Li <Frank.Li@nxp.com>

diff --git a/arch/arm64/boot/dts/freescale/imx91-phycore-som.dtsi b/arch/arm64/boot/dts/freescale/imx91-phycore-som.dtsi
index 95a6a0b1dd7531ea990ecf26a427c94e8afd3b7c..1d8adfd34e92f38e40c4d3245c4338c7617f841e 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx91-phycore-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx91-phycore-som.dtsi
@@ -242,7 +242,7 @@
                        MX91_PAD_ENET2_TD1__ENET2_RGMII_TD1             0x50e
                        MX91_PAD_ENET2_TX_CTL__ENET2_RGMII_TX_CTL       0x50e
                        MX91_PAD_ENET2_TD2__ENET2_TX_CLK2               0x4000050e
-                       MX91_PAD_ENET2_RXC__GPIO4_IO23                  0x51e
+                       MX91_PAD_ENET2_RXC__GPIO4_IO23                  0x502
                >;
        };
 

diff --git a/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi b/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi
index d59a89254623e41373c15d46c98347bd6a4ed1ce..5148101def31632ca6f31c2e25e04eb1db779cd5 100644 (file)
--- a/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx93-phycore-som.dtsi
@@ -244,7 +244,7 @@
                        MX93_PAD_ENET2_TD1__ENET1_RGMII_TD1             0x50e
                        MX93_PAD_ENET2_TX_CTL__ENET1_RGMII_TX_CTL       0x50e
                        MX93_PAD_ENET2_TD2__ENET1_TX_CLK                0x4000050e
-                       MX93_PAD_ENET2_RXC__GPIO4_IO23                  0x51e
+                       MX93_PAD_ENET2_RXC__GPIO4_IO23                  0x502
                >;
        };