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authorArnd Bergmann <arnd@arndb.de>2017-02-07 15:25:19 +0100
committerArnd Bergmann <arnd@arndb.de>2017-02-07 15:25:19 +0100
commit4b5f4835d16b0d8a7599e930b17e27fc6f1f3aba (patch)
treee79749ed5cf8ddafa2263f649fe418da227a4a87 /arch/arm/boot
parent54fe90874fd37caeb8914a1dee511920fa799c08 (diff)
parent390891d0baf82278a04835c8a62bb14dca98b96b (diff)
Merge tag 'stm32-dt-for-v4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32 into next/dt
Pull "STM32 DT updates for v4.11, round 2" from Alexandre Torgue: Highlights: ---------- - ADD Timers support on STM32F429 MCU - Enable PWM1 & PWM3 on STM32F469 Disco board - Fix STM32F4_X_CLOCK macro - Use STM32F4_X_CLOCK macro in STM32 device tree - Add I2C1 support for STM32F429 MCU - Enable I2C1 on STM32F429 eval board * tag 'stm32-dt-for-v4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32: ARM: dts: stm32: Add I2C1 support for STM32429 eval board ARM: dts: stm32: Add I2C1 support for STM32F429 SoC ARM: dts: stm32: Use clock DT binding definition on stm32f429 family dt-bindings: mfd: stm32f4: Add missing binding definition dt-bindings: mfd: stm32f4: Fix STM32F4_X_CLOCK() macro ARM: dts: stm32: Enable pwm1 and pwm3 for stm32f469-disco ARM: dts: stm32: add Timers driver for stm32f429 MCU
Diffstat (limited to 'arch/arm/boot')
-rw-r--r--arch/arm/boot/dts/stm32429i-eval.dts8
-rw-r--r--arch/arm/boot/dts/stm32f429.dtsi371
-rw-r--r--arch/arm/boot/dts/stm32f469-disco.dts28
3 files changed, 371 insertions, 36 deletions
diff --git a/arch/arm/boot/dts/stm32429i-eval.dts b/arch/arm/boot/dts/stm32429i-eval.dts
index eedb27d33f66..3c99466989b1 100644
--- a/arch/arm/boot/dts/stm32429i-eval.dts
+++ b/arch/arm/boot/dts/stm32429i-eval.dts
@@ -121,7 +121,7 @@
usbotg_hs_phy: usbphy {
#phy-cells = <0>;
compatible = "usb-nop-xceiv";
- clocks = <&rcc 0 30>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(OTGHSULPI)>;
clock-names = "main_clk";
};
};
@@ -141,6 +141,12 @@
clock-frequency = <25000000>;
};
+&i2c1 {
+ pinctrl-0 = <&i2c1_pins>;
+ pinctrl-names = "default";
+ status = "okay";
+};
+
&mac {
status = "okay";
pinctrl-0 = <&ethernet_mii>;
diff --git a/arch/arm/boot/dts/stm32f429.dtsi b/arch/arm/boot/dts/stm32f429.dtsi
index f05a9d95ef23..ee0da970e8ad 100644
--- a/arch/arm/boot/dts/stm32f429.dtsi
+++ b/arch/arm/boot/dts/stm32f429.dtsi
@@ -49,6 +49,7 @@
#include "armv7-m.dtsi"
#include <dt-bindings/pinctrl/stm32f429-pinfunc.h>
#include <dt-bindings/clock/stm32fx-clock.h>
+#include <dt-bindings/mfd/stm32f4-rcc.h>
/ {
clocks {
@@ -82,47 +83,214 @@
compatible = "st,stm32-timer";
reg = <0x40000000 0x400>;
interrupts = <28>;
- clocks = <&rcc 0 128>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM2)>;
status = "disabled";
};
+ timers2: timers@40000000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40000000 0x400>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM2)>;
+ clock-names = "int";
+ status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+
+ timer@1 {
+ compatible = "st,stm32-timer-trigger";
+ reg = <1>;
+ status = "disabled";
+ };
+ };
+
timer3: timer@40000400 {
compatible = "st,stm32-timer";
reg = <0x40000400 0x400>;
interrupts = <29>;
- clocks = <&rcc 0 129>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM3)>;
+ status = "disabled";
+ };
+
+ timers3: timers@40000400 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40000400 0x400>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM3)>;
+ clock-names = "int";
status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+
+ timer@2 {
+ compatible = "st,stm32-timer-trigger";
+ reg = <2>;
+ status = "disabled";
+ };
};
timer4: timer@40000800 {
compatible = "st,stm32-timer";
reg = <0x40000800 0x400>;
interrupts = <30>;
- clocks = <&rcc 0 130>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM4)>;
+ status = "disabled";
+ };
+
+ timers4: timers@40000800 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40000800 0x400>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM4)>;
+ clock-names = "int";
status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+
+ timer@3 {
+ compatible = "st,stm32-timer-trigger";
+ reg = <3>;
+ status = "disabled";
+ };
};
timer5: timer@40000c00 {
compatible = "st,stm32-timer";
reg = <0x40000c00 0x400>;
interrupts = <50>;
- clocks = <&rcc 0 131>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM5)>;
+ };
+
+ timers5: timers@40000c00 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40000C00 0x400>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM5)>;
+ clock-names = "int";
+ status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+
+ timer@4 {
+ compatible = "st,stm32-timer-trigger";
+ reg = <4>;
+ status = "disabled";
+ };
};
timer6: timer@40001000 {
compatible = "st,stm32-timer";
reg = <0x40001000 0x400>;
interrupts = <54>;
- clocks = <&rcc 0 132>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM6)>;
+ status = "disabled";
+ };
+
+ timers6: timers@40001000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40001000 0x400>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM6)>;
+ clock-names = "int";
status = "disabled";
+
+ timer@5 {
+ compatible = "st,stm32-timer-trigger";
+ reg = <5>;
+ status = "disabled";
+ };
};
timer7: timer@40001400 {
compatible = "st,stm32-timer";
reg = <0x40001400 0x400>;
interrupts = <55>;
- clocks = <&rcc 0 133>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM7)>;
+ status = "disabled";
+ };
+
+ timers7: timers@40001400 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40001400 0x400>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM7)>;
+ clock-names = "int";
+ status = "disabled";
+
+ timer@6 {
+ compatible = "st,stm32-timer-trigger";
+ reg = <6>;
+ status = "disabled";
+ };
+ };
+
+ timers12: timers@40001800 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40001800 0x400>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM12)>;
+ clock-names = "int";
+ status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+
+ timer@11 {
+ compatible = "st,stm32-timer-trigger";
+ reg = <11>;
+ status = "disabled";
+ };
+ };
+
+ timers13: timers@40001c00 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40001C00 0x400>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM13)>;
+ clock-names = "int";
+ status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+ };
+
+ timers14: timers@40002000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40002000 0x400>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(TIM14)>;
+ clock-names = "int";
status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
};
rtc: rtc@40002800 {
@@ -143,7 +311,7 @@
compatible = "st,stm32-usart", "st,stm32-uart";
reg = <0x40004400 0x400>;
interrupts = <38>;
- clocks = <&rcc 0 145>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(UART2)>;
status = "disabled";
};
@@ -151,7 +319,7 @@
compatible = "st,stm32-usart", "st,stm32-uart";
reg = <0x40004800 0x400>;
interrupts = <39>;
- clocks = <&rcc 0 146>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(UART3)>;
status = "disabled";
dmas = <&dma1 1 4 0x400 0x0>,
<&dma1 3 4 0x400 0x0>;
@@ -162,7 +330,7 @@
compatible = "st,stm32-uart";
reg = <0x40004c00 0x400>;
interrupts = <52>;
- clocks = <&rcc 0 147>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(UART4)>;
status = "disabled";
};
@@ -170,7 +338,19 @@
compatible = "st,stm32-uart";
reg = <0x40005000 0x400>;
interrupts = <53>;
- clocks = <&rcc 0 148>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(UART5)>;
+ status = "disabled";
+ };
+
+ i2c1: i2c@40005400 {
+ compatible = "st,stm32f4-i2c";
+ reg = <0x40005400 0x400>;
+ interrupts = <31>,
+ <32>;
+ resets = <&rcc STM32F4_APB1_RESET(I2C1)>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(I2C1)>;
+ #address-cells = <1>;
+ #size-cells = <0>;
status = "disabled";
};
@@ -178,7 +358,7 @@
compatible = "st,stm32-usart", "st,stm32-uart";
reg = <0x40007800 0x400>;
interrupts = <82>;
- clocks = <&rcc 0 158>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(UART7)>;
status = "disabled";
};
@@ -186,15 +366,57 @@
compatible = "st,stm32-usart", "st,stm32-uart";
reg = <0x40007c00 0x400>;
interrupts = <83>;
- clocks = <&rcc 0 159>;
+ clocks = <&rcc 0 STM32F4_APB1_CLOCK(UART8)>;
+ status = "disabled";
+ };
+
+ timers1: timers@40010000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40010000 0x400>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(TIM1)>;
+ clock-names = "int";
+ status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+
+ timer@0 {
+ compatible = "st,stm32-timer-trigger";
+ reg = <0>;
+ status = "disabled";
+ };
+ };
+
+ timers8: timers@40010400 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40010400 0x400>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(TIM8)>;
+ clock-names = "int";
status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+
+ timer@7 {
+ compatible = "st,stm32-timer-trigger";
+ reg = <7>;
+ status = "disabled";
+ };
};
usart1: serial@40011000 {
compatible = "st,stm32-usart", "st,stm32-uart";
reg = <0x40011000 0x400>;
interrupts = <37>;
- clocks = <&rcc 0 164>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(USART1)>;
status = "disabled";
dmas = <&dma2 2 4 0x400 0x0>,
<&dma2 7 4 0x400 0x0>;
@@ -205,7 +427,7 @@
compatible = "st,stm32-usart", "st,stm32-uart";
reg = <0x40011400 0x400>;
interrupts = <71>;
- clocks = <&rcc 0 165>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(USART6)>;
status = "disabled";
};
@@ -213,7 +435,7 @@
compatible = "st,stm32f4-adc-core";
reg = <0x40012000 0x400>;
interrupts = <18>;
- clocks = <&rcc 0 168>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(ADC1)>;
clock-names = "adc";
interrupt-controller;
#interrupt-cells = <1>;
@@ -225,7 +447,7 @@
compatible = "st,stm32f4-adc";
#io-channel-cells = <1>;
reg = <0x0>;
- clocks = <&rcc 0 168>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(ADC1)>;
interrupt-parent = <&adc>;
interrupts = <0>;
status = "disabled";
@@ -235,7 +457,7 @@
compatible = "st,stm32f4-adc";
#io-channel-cells = <1>;
reg = <0x100>;
- clocks = <&rcc 0 169>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(ADC2)>;
interrupt-parent = <&adc>;
interrupts = <1>;
status = "disabled";
@@ -245,7 +467,7 @@
compatible = "st,stm32f4-adc";
#io-channel-cells = <1>;
reg = <0x200>;
- clocks = <&rcc 0 170>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(ADC3)>;
interrupt-parent = <&adc>;
interrupts = <2>;
status = "disabled";
@@ -265,6 +487,57 @@
interrupts = <1>, <2>, <3>, <6>, <7>, <8>, <9>, <10>, <23>, <40>, <41>, <42>, <62>, <76>;
};
+ timers9: timers@40014000 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40014000 0x400>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(TIM9)>;
+ clock-names = "int";
+ status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+
+ timer@8 {
+ compatible = "st,stm32-timer-trigger";
+ reg = <8>;
+ status = "disabled";
+ };
+ };
+
+ timers10: timers@40014400 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40014400 0x400>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(TIM10)>;
+ clock-names = "int";
+ status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+ };
+
+ timers11: timers@40014800 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ compatible = "st,stm32-timers";
+ reg = <0x40014800 0x400>;
+ clocks = <&rcc 0 STM32F4_APB2_CLOCK(TIM11)>;
+ clock-names = "int";
+ status = "disabled";
+
+ pwm {
+ compatible = "st,stm32-pwm";
+ status = "disabled";
+ };
+ };
+
pwrcfg: power-config@40007000 {
compatible = "syscon";
reg = <0x40007000 0x400>;
@@ -283,7 +556,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0x0 0x400>;
- clocks = <&rcc 0 0>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOA)>;
st,bank-name = "GPIOA";
};
@@ -291,7 +564,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0x400 0x400>;
- clocks = <&rcc 0 1>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOB)>;
st,bank-name = "GPIOB";
};
@@ -299,7 +572,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0x800 0x400>;
- clocks = <&rcc 0 2>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOC)>;
st,bank-name = "GPIOC";
};
@@ -307,7 +580,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0xc00 0x400>;
- clocks = <&rcc 0 3>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOD)>;
st,bank-name = "GPIOD";
};
@@ -315,7 +588,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0x1000 0x400>;
- clocks = <&rcc 0 4>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOE)>;
st,bank-name = "GPIOE";
};
@@ -323,7 +596,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0x1400 0x400>;
- clocks = <&rcc 0 5>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOF)>;
st,bank-name = "GPIOF";
};
@@ -331,7 +604,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0x1800 0x400>;
- clocks = <&rcc 0 6>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOG)>;
st,bank-name = "GPIOG";
};
@@ -339,7 +612,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0x1c00 0x400>;
- clocks = <&rcc 0 7>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOH)>;
st,bank-name = "GPIOH";
};
@@ -347,7 +620,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0x2000 0x400>;
- clocks = <&rcc 0 8>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOI)>;
st,bank-name = "GPIOI";
};
@@ -355,7 +628,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0x2400 0x400>;
- clocks = <&rcc 0 9>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOJ)>;
st,bank-name = "GPIOJ";
};
@@ -363,7 +636,7 @@
gpio-controller;
#gpio-cells = <2>;
reg = <0x2800 0x400>;
- clocks = <&rcc 0 10>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOK)>;
st,bank-name = "GPIOK";
};
@@ -438,6 +711,31 @@
pinmux = <STM32F429_PF10_FUNC_ANALOG>;
};
};
+
+ pwm1_pins: pwm@1 {
+ pins {
+ pinmux = <STM32F429_PA8_FUNC_TIM1_CH1>,
+ <STM32F429_PB13_FUNC_TIM1_CH1N>,
+ <STM32F429_PB12_FUNC_TIM1_BKIN>;
+ };
+ };
+
+ pwm3_pins: pwm@3 {
+ pins {
+ pinmux = <STM32F429_PB4_FUNC_TIM3_CH1>,
+ <STM32F429_PB5_FUNC_TIM3_CH2>;
+ };
+ };
+
+ i2c1_pins: i2c1@0 {
+ pins {
+ pinmux = <STM32F429_PB9_FUNC_I2C1_SDA>,
+ <STM32F429_PB6_FUNC_I2C1_SCL>;
+ bias-disable;
+ drive-open-drain;
+ slew-rate = <3>;
+ };
+ };
};
rcc: rcc@40023810 {
@@ -462,7 +760,7 @@
<16>,
<17>,
<47>;
- clocks = <&rcc 0 21>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(DMA1)>;
#dma-cells = <4>;
};
@@ -477,7 +775,7 @@
<68>,
<69>,
<70>;
- clocks = <&rcc 0 22>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(DMA2)>;
#dma-cells = <4>;
st,mem2mem;
};
@@ -489,7 +787,9 @@
interrupts = <61>;
interrupt-names = "macirq";
clock-names = "stmmaceth", "mac-clk-tx", "mac-clk-rx";
- clocks = <&rcc 0 25>, <&rcc 0 26>, <&rcc 0 27>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(ETHMAC)>,
+ <&rcc 0 STM32F4_AHB1_CLOCK(ETHMACTX)>,
+ <&rcc 0 STM32F4_AHB1_CLOCK(ETHMACRX)>;
st,syscon = <&syscfg 0x4>;
snps,pbl = <8>;
snps,mixed-burst;
@@ -500,7 +800,7 @@
compatible = "snps,dwc2";
reg = <0x40040000 0x40000>;
interrupts = <77>;
- clocks = <&rcc 0 29>;
+ clocks = <&rcc 0 STM32F4_AHB1_CLOCK(OTGHS)>;
clock-names = "otg";
status = "disabled";
};
@@ -509,12 +809,13 @@
compatible = "st,stm32-rng";
reg = <0x50060800 0x400>;
interrupts = <80>;
- clocks = <&rcc 0 38>;
+ clocks = <&rcc 0 STM32F4_AHB2_CLOCK(RNG)>;
+
};
};
};
&systick {
- clocks = <&rcc 1 0>;
+ clocks = <&rcc 1 SYSTICK>;
status = "okay";
};
diff --git a/arch/arm/boot/dts/stm32f469-disco.dts b/arch/arm/boot/dts/stm32f469-disco.dts
index f52b9f6cf566..0dd56ef574fa 100644
--- a/arch/arm/boot/dts/stm32f469-disco.dts
+++ b/arch/arm/boot/dts/stm32f469-disco.dts
@@ -82,6 +82,34 @@
status = "okay";
};
+&timers1 {
+ status = "okay";
+
+ pwm {
+ pinctrl-0 = <&pwm1_pins>;
+ pinctrl-names = "default";
+ status = "okay";
+ };
+
+ timer@0 {
+ status = "okay";
+ };
+};
+
+&timers3 {
+ status = "okay";
+
+ pwm {
+ pinctrl-0 = <&pwm3_pins>;
+ pinctrl-names = "default";
+ status = "okay";
+ };
+
+ timer@2 {
+ status = "okay";
+ };
+};
+
&usart3 {
pinctrl-0 = <&usart3_pins_a>;
pinctrl-names = "default";