ARM: DT: stm32f7: add pin control node for serial port pins

And remove the uart pin configuration from board initialization.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>

diff --git a/arch/arm/dts/stm32f746-disco.dts b/arch/arm/dts/stm32f746-disco.dts
index 454b515..6734f23 100644 (file)
--- a/arch/arm/dts/stm32f746-disco.dts
+++ b/arch/arm/dts/stm32f746-disco.dts
@@ -70,6 +70,12 @@
        clock-frequency = <25000000>;
 };
 
+&usart1 {
+       pinctrl-0 = <&usart1_pins_a>;
+       pinctrl-names = "default";
+       status = "okay";
+};
+
 &mac {
        status = "okay";
        phy-mode = "rmii";

diff --git a/arch/arm/dts/stm32f746.dtsi b/arch/arm/dts/stm32f746.dtsi
index f59eca8..867f399 100644 (file)
--- a/arch/arm/dts/stm32f746.dtsi
+++ b/arch/arm/dts/stm32f746.dtsi
@@ -104,6 +104,19 @@
                        ranges = <0 0x40020000 0x3000>;
                        u-boot,dm-pre-reloc;
                        pins-are-numbered;
+
+                       usart1_pins_a: usart1@0 {
+                               pins1 {
+                                       pinmux = <STM32F746_PA9_FUNC_USART1_TX>;
+                                       bias-disable;
+                                       drive-push-pull;
+                                       slew-rate = <2>;
+                               };
+                               pins2 {
+                                       pinmux = <STM32F746_PB7_FUNC_USART1_RX>;
+                                       bias-disable;
+                               };
+                       };
                };
        };
 };

diff --git a/board/st/stm32f746-disco/stm32f746-disco.c b/board/st/stm32f746-disco/stm32f746-disco.c
index ee1deb5..9ebc36b 100644 (file)
--- a/board/st/stm32f746-disco/stm32f746-disco.c
+++ b/board/st/stm32f746-disco/stm32f746-disco.c
@@ -27,14 +27,6 @@ const struct stm32_gpio_ctl gpio_ctl_gpout = {
        .af = STM32_GPIO_AF0
 };
 
-const struct stm32_gpio_ctl gpio_ctl_usart = {
-       .mode = STM32_GPIO_MODE_AF,
-       .otype = STM32_GPIO_OTYPE_PP,
-       .speed = STM32_GPIO_SPEED_50M,
-       .pupd = STM32_GPIO_PUPD_UP,
-       .af = STM32_GPIO_AF7
-};
-
 const struct stm32_gpio_ctl gpio_ctl_fmc = {
        .mode = STM32_GPIO_MODE_AF,
        .otype = STM32_GPIO_OTYPE_PP,
@@ -245,26 +237,11 @@ int dram_init(void)
        return rv;
 }
 
-static const struct stm32_gpio_dsc usart_gpio[] = {
-       {STM32_GPIO_PORT_A, STM32_GPIO_PIN_9},  /* TX */
-       {STM32_GPIO_PORT_B, STM32_GPIO_PIN_7},  /* RX */
-};
-
 int uart_setup_gpio(void)
 {
-       int i;
-       int rv = 0;
-
        clock_setup(GPIO_A_CLOCK_CFG);
        clock_setup(GPIO_B_CLOCK_CFG);
-       for (i = 0; i < ARRAY_SIZE(usart_gpio); i++) {
-               rv = stm32_gpio_config(&usart_gpio[i], &gpio_ctl_usart);
-               if (rv)
-                       goto out;
-       }
-
-out:
-       return rv;
+       return 0;
 }
 
 #ifdef CONFIG_ETH_DESIGNWARE