[PATCH v2 34/34] ARM: dts: sama7g5ek: fix TXC pin configuration

Eugen Hristev
2020-12-05T10:03:16Z

From: Nicolas Ferre <nicolas.ferre@microchip.com>

TXC line is directly connected from the SoC to the KSZ9131 PHY. There
is a transient state on this signal, before configuring it to RGMII,
which leads to packet transmit being blocked.
Keeping a pull-up when muxing this pin as function A (G0_TXCK) fixes
the issue.

Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
---
arch/arm/dts/sama7g5ek.dts | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm/dts/sama7g5ek.dts b/arch/arm/dts/sama7g5ek.dts
index b7c35559fe..ff9c9eb45c 100644
--- a/arch/arm/dts/sama7g5ek.dts
+++ b/arch/arm/dts/sama7g5ek.dts
@@ -90,7 +90,7 @@
#address-cells = <1>;
#size-cells = <0>;
pinctrl-names = "default";
- pinctrl-0 = <&pinctrl_gmac0_default>;
+ pinctrl-0 = <&pinctrl_gmac0_default &pinctrl_gmac0_txc_default>;
phy-mode = "rgmii-id";
status = "okay";

@@ -173,7 +173,6 @@
<PIN_PA28__G0_RX2>,
<PIN_PA29__G0_RX3>,
<PIN_PA15__G0_TXEN>,
- <PIN_PA24__G0_TXCK>,
<PIN_PA30__G0_RXCK>,
<PIN_PA18__G0_RXDV>,
<PIN_PA22__G0_MDC>,
@@ -182,6 +181,11 @@
bias-disable;
};

+ pinctrl_gmac0_txc_default: gmac0_txc_default {
+ pinmux = <PIN_PA24__G0_TXCK>;
+ bias-pull-up;
+ };
+
pinctrl_gmac1_default: gmac1_default {
pinmux = <PIN_PD30__G1_TXCK>,
<PIN_PD22__G1_TX0>,
--
2.25.1