ARM: dts: stm32: fix usart 2 & 3 pinconf to wake up with flow control

Modify usart 2 & 3 pins to allow wake up from low power mode while the
hardware flow control is activated. UART RTS pin need to stay configure
in idle mode to receive characters in order to wake up.

Fixes: 842ed898a757 ("ARM: dts: stm32: add usart2, usart3 and uart7 pins in stm32mp15-pinctrl")
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

diff --git a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi
index 7b4249ed198330ad01a6dd128020874b8866fedd..060baa8b7e9d4daadc97c9f8545307d60eb2e2c8 100644 (file)
--- a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi
+++ b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi
@@ -1891,10 +1891,15 @@
        usart2_idle_pins_c: usart2-idle-2 {
                pins1 {
                        pinmux = <STM32_PINMUX('D', 5, ANALOG)>, /* USART2_TX */
-                                <STM32_PINMUX('D', 4, ANALOG)>, /* USART2_RTS */
                                 <STM32_PINMUX('D', 3, ANALOG)>; /* USART2_CTS_NSS */
                };
                pins2 {
+                       pinmux = <STM32_PINMUX('D', 4, AF7)>; /* USART2_RTS */
+                       bias-disable;
+                       drive-push-pull;
+                       slew-rate = <3>;
+               };
+               pins3 {
                        pinmux = <STM32_PINMUX('D', 6, AF7)>; /* USART2_RX */
                        bias-disable;
                };
@@ -1940,10 +1945,15 @@
        usart3_idle_pins_b: usart3-idle-1 {
                pins1 {
                        pinmux = <STM32_PINMUX('B', 10, ANALOG)>, /* USART3_TX */
-                                <STM32_PINMUX('G', 8, ANALOG)>, /* USART3_RTS */
                                 <STM32_PINMUX('I', 10, ANALOG)>; /* USART3_CTS_NSS */
                };
                pins2 {
+                       pinmux = <STM32_PINMUX('G', 8, AF8)>; /* USART3_RTS */
+                       bias-disable;
+                       drive-push-pull;
+                       slew-rate = <0>;
+               };
+               pins3 {
                        pinmux = <STM32_PINMUX('B', 12, AF8)>; /* USART3_RX */
                        bias-disable;
                };
@@ -1976,10 +1986,15 @@
        usart3_idle_pins_c: usart3-idle-2 {
                pins1 {
                        pinmux = <STM32_PINMUX('B', 10, ANALOG)>, /* USART3_TX */
-                                <STM32_PINMUX('G', 8, ANALOG)>, /* USART3_RTS */
                                 <STM32_PINMUX('B', 13, ANALOG)>; /* USART3_CTS_NSS */
                };
                pins2 {
+                       pinmux = <STM32_PINMUX('G', 8, AF8)>; /* USART3_RTS */
+                       bias-disable;
+                       drive-push-pull;
+                       slew-rate = <0>;
+               };
+               pins3 {
                        pinmux = <STM32_PINMUX('B', 12, AF8)>; /* USART3_RX */
                        bias-disable;
                };