The RTL8211F PHY gets confused when the MDIO bus lines get switched
to ANALOG during suspend/resume cycle. Keep the MDIO and MDC lines
in AF during suspend/resume to avoid confusing the PHY. The PHY can
be brought out of the confused state by restarting auto-negotiation
too, but that seems like an odd workaround and shouldn't be in the
PHY driver.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
---
Cc: Alexandre Torgue <alexandre.torgue@xxxxxxxxxxx>
Cc: Christophe Roullier <christophe.roullier@xxxxxxxxxxx>
Cc: Conor Dooley <conor+dt@xxxxxxxxxx>
Cc: Krzysztof Kozlowski <krzk+dt@xxxxxxxxxx>
Cc: Maxime Coquelin <mcoquelin.stm32@xxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: kernel@xxxxxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-stm32@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
---
arch/arm/boot/dts/st/stm32mp13-pinctrl.dtsi | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/arch/arm/boot/dts/st/stm32mp13-pinctrl.dtsi b/arch/arm/boot/dts/st/stm32mp13-pinctrl.dtsi
index d3deec602ae7a..e6c0dceee9866 100644
--- a/arch/arm/boot/dts/st/stm32mp13-pinctrl.dtsi
+++ b/arch/arm/boot/dts/st/stm32mp13-pinctrl.dtsi
@@ -88,14 +88,20 @@ pins2 {
eth1_rgmii_sleep_pins_a: eth1-rgmii-sleep-0 {
pins1 {
+ pinmux = <STM32_PINMUX('A', 2, AF11)>, /* ETH_MDIO */
+ <STM32_PINMUX('G', 2, AF11)>; /* ETH_MDC */
+ bias-disable;
+ drive-push-pull;
+ slew-rate = <2>;
+ };
+
+ pins2 {
pinmux = <STM32_PINMUX('G', 13, ANALOG)>, /* ETH_RGMII_TXD0 */
<STM32_PINMUX('G', 14, ANALOG)>, /* ETH_RGMII_TXD1 */
<STM32_PINMUX('C', 2, ANALOG)>, /* ETH_RGMII_TXD2 */
<STM32_PINMUX('E', 5, ANALOG)>, /* ETH_RGMII_TXD3 */
<STM32_PINMUX('B', 11, ANALOG)>, /* ETH_RGMII_TX_CTL */
<STM32_PINMUX('C', 1, ANALOG)>, /* ETH_RGMII_GTX_CLK */
- <STM32_PINMUX('A', 2, ANALOG)>, /* ETH_MDIO */
- <STM32_PINMUX('G', 2, ANALOG)>, /* ETH_MDC */
<STM32_PINMUX('C', 4, ANALOG)>, /* ETH_RGMII_RXD0 */
<STM32_PINMUX('C', 5, ANALOG)>, /* ETH_RGMII_RXD1 */
<STM32_PINMUX('B', 0, ANALOG)>, /* ETH_RGMII_RXD1 */
@@ -169,14 +175,20 @@ pins2 {
eth2_rgmii_sleep_pins_a: eth2-rgmii-sleep-0 {
pins1 {
+ pinmux = <STM32_PINMUX('B', 6, ANALOG)>, /* ETH_MDIO */
+ <STM32_PINMUX('G', 5, ANALOG)>; /* ETH_MDC */
+ bias-disable;
+ drive-push-pull;
+ slew-rate = <2>;
+ };
+
+ pins2 {
pinmux = <STM32_PINMUX('F', 7, ANALOG)>, /* ETH_RGMII_TXD0 */
<STM32_PINMUX('G', 11, ANALOG)>, /* ETH_RGMII_TXD1 */
<STM32_PINMUX('G', 1, ANALOG)>, /* ETH_RGMII_TXD2 */
<STM32_PINMUX('E', 6, ANALOG)>, /* ETH_RGMII_TXD3 */
<STM32_PINMUX('F', 6, ANALOG)>, /* ETH_RGMII_TX_CTL */
<STM32_PINMUX('G', 3, ANALOG)>, /* ETH_RGMII_GTX_CLK */
- <STM32_PINMUX('B', 6, ANALOG)>, /* ETH_MDIO */
- <STM32_PINMUX('G', 5, ANALOG)>, /* ETH_MDC */
<STM32_PINMUX('F', 4, ANALOG)>, /* ETH_RGMII_RXD0 */
<STM32_PINMUX('E', 2, ANALOG)>, /* ETH_RGMII_RXD1 */
<STM32_PINMUX('H', 6, ANALOG)>, /* ETH_RGMII_RXD2 */
--
2.43.0
