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ARM: dts: stm32: Keep MDIO bus in AF across suspend DH STM32MP13xx DHCOR DHSBC board

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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@denx.de>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
This commit is contained in:
Marek Vasut 2024-07-05 09:59:10 +02:00 committed by Alexandre Torgue
parent 8400291e28
commit b230e1b21c
1 changed files with 16 additions and 4 deletions
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20
arch/arm/boot/dts/st/stm32mp13-pinctrl.dtsi
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@ -94,14 +94,20 @@ pins2 {
/omit-if-no-ref/
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 */
@ -178,14 +184,20 @@ pins2 {
/omit-if-no-ref/
eth2_rgmii_sleep_pins_a: eth2-rgmii-sleep-0 {
pins1 {
pinmux = <STM32_PINMUX('B', 6, AF11)>, /* ETH_MDIO */
<STM32_PINMUX('G', 5, AF10)>; /* 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 */